Cocotb 2.0 changes

value_change, kill -> cancel

.github/workflows/build.yaml

@@ -0,0 +1,63 @@
+name: build
+
+on:
+  push:
+    branches:
+      - master
+      - 'dev/**'
+  pull_request:
+    branches: [ master ]
+  release:
+    types:
+      - published
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build distributions
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-python@v4
+        name: Install Python
+        with:
+          python-version: "3.10"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install build
+
+      - name: Build sdist
+        run: python -m build
+
+      - uses: actions/upload-artifact@v3
+        with:
+          name: dist
+          path: |
+            dist/*.tar.gz
+            dist/*.whl
+
+#-------------------------------------------------------------------------------
+  deploy:
+    needs:
+      - build
+
+    runs-on: ubuntu-latest
+    environment: release
+    permissions:
+      id-token: write
+
+    # Only publish when a Gitea Release is created.
+    if: gitea.event_name == 'release'
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: dist
+          path: dist
+
+      - run: python3 -m pip install twine --user --break-system-packages
+      - run: python3 -m pip install -U packaging --user --break-system-packages
+      - run: TWINE_PASSWORD=${{ secrets.PYPI_PAT }} TWINE_USERNAME=bslathi19 python -m twine upload --repository-url ${{ vars.CI_API_URL }} dist/*

.github/workflows/regression-tests.yml

@@ -5,17 +5,17 @@ on: [push, pull_request]
 jobs:
   build:
     name: Python ${{matrix.python-version}}
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v3
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
 

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -1,6 +1,6 @@
 # Ethernet interface modules for Cocotb
 
-[![Build Status](https://github.com/alexforencich/cocotbext-eth/workflows/Regression%20Tests/badge.svg?branch=master)](https://github.com/alexforencich/cocotbext-eth/actions/)
+[![Regression Tests](https://github.com/alexforencich/cocotbext-eth/actions/workflows/regression-tests.yml/badge.svg)](https://github.com/alexforencich/cocotbext-eth/actions/workflows/regression-tests.yml)
 [![codecov](https://codecov.io/gh/alexforencich/cocotbext-eth/branch/master/graph/badge.svg)](https://codecov.io/gh/alexforencich/cocotbext-eth)
 [![PyPI version](https://badge.fury.io/py/cocotbext-eth.svg)](https://pypi.org/project/cocotbext-eth)
 [![Downloads](https://pepy.tech/badge/cocotbext-eth)](https://pepy.tech/project/cocotbext-eth)
@@ -30,7 +30,7 @@ Installation for active development:
 
 ## Documentation and usage examples
 
-See the `tests` directory, [verilog-ethernet](https://github.com/alexforencich/verilog-ethernet), and [corundum](https://github.com/corundum/corundum) for complete testbenches using these modules.
+See the `tests` directory, [taxi](https://github.com/fpganinja/taxi), [verilog-ethernet](https://github.com/alexforencich/verilog-ethernet), and [corundum](https://github.com/corundum/corundum) for complete testbenches using these modules.
 
 ### GMII
 
@@ -467,6 +467,7 @@ To use these modules, import the one you need and connect it to the DUT:
         tx_bus=AxiStreamBus.from_prefix(dut, "tx_axis"),
         tx_ptp_time=dut.tx_ptp_time,
         tx_ptp_ts=dut.tx_ptp_ts,
+        tx_ptp_ts_tag=dut.tx_ptp_ts_tag,
         tx_ptp_ts_valid=dut.tx_ptp_ts_valid,
         rx_clk=dut.rx_clk,
         rx_rst=dut.rx_rst,
@@ -492,6 +493,8 @@ To receive data, call `recv()` or `recv_nowait()`.  Optionally call `wait()` to
 
     data = await mac.tx.recv()
 
+PTP timestamping requires free-running PTP clocks driving the PTP time inputs, synchronous with the corresponding MAC clocks.  The values of these fields are then captured when the frame SFD is transferred and returned either on tuser (for received frames) or on a separate streaming interface (for transmitted frames).  Additionally, on the transmit path, a tag value from tuser is returned along with the timestamp.
+
 #### Signals
 
 * `tdata`: payload data, must be a multiple of 8 bits
@@ -499,9 +502,10 @@ To receive data, call `recv()` or `recv_nowait()`.  Optionally call `wait()` to
 * `tready`: indicates sink is ready for data (tx only)
 * `tlast`: marks the last cycle of a frame
 * `tkeep`: qualifies data byte, data bus width must be evenly divisible by `tkeep` signal width
-* `tuser`: user data, carries frame error mark and captured receive PTP timestamp
-* `ptp_time`: PTP time input from PHC, captured into `ptp_timestamp` field coincident with transfer of frame SFD and output on `ptp_ts`
+* `tuser`: user data, carries frame error mark and captured receive PTP timestamp (RX) or PTP timestamp tag (TX)
+* `ptp_time`: PTP time input from PHC, captured into `ptp_timestamp` field coincident with transfer of frame SFD and output on `ptp_ts` (TX) or `tuser` (RX)
 * `ptp_ts`: captured transmit PTP timestamp
+* `ptp_ts_tag`: captured transmit PTP timestamp tag
 * `ptp_ts_valid`: qualifies captured transmit PTP timestamp
 
 #### Constructor parameters (`EthMacRx` and `EthMacTx`):
@@ -510,7 +514,8 @@ To receive data, call `recv()` or `recv_nowait()`.  Optionally call `wait()` to
 * _clock_: clock signal
 * _reset_: reset signal (optional)
 * _ptp_time_: PTP time input from PHC (optional)
-* _ptp_ts_: PTP timestamp output (optional) (tx)
+* _ptp_ts_: PTP timestamp (optional) (tx)
+* _ptp_ts_tag_: PTP timestamp tag (optional) (tx)
 * _ptp_ts_valid_: PTP timestamp valid (optional) (tx)
 * _reset_active_level_: reset active level (optional, default `True`)
 * _ifg_: IFG size in byte times (optional, default `12`)
@@ -522,7 +527,8 @@ To receive data, call `recv()` or `recv_nowait()`.  Optionally call `wait()` to
 * _tx_clk_: transmit clock
 * _tx_rst_: transmit reset (optional)
 * _tx_ptp_time_: transmit PTP time input from PHC (optional)
-* _tx_ptp_ts_: transmit PTP timestamp output (optional)
+* _tx_ptp_ts_: transmit PTP timestamp (optional)
+* _tx_ptp_ts_tag_: transmit PTP timestamp tag (optional)
 * _tx_ptp_ts_valid_: transmit PTP timestamp valid (optional)
 * _rx_bus_: `AxiStreamBus` object containing receive AXI stream interface signals
 * _rx_clk_: receive clock
@@ -565,6 +571,7 @@ Attributes:
 * `sim_time_start`: simulation time of first transfer cycle of frame.
 * `sim_time_sfd`: simulation time at which the SFD was transferred.
 * `sim_time_end`: simulation time of last transfer cycle of frame.
+* `ptp_tag`: PTP timestamp tag for transmitted frames.
 * `ptp_timestamp`: captured value of `ptp_time` at frame SFD
 * `tx_complete`: event or callable triggered when frame is transmitted.
 
@@ -578,15 +585,15 @@ Methods:
 
 ### PTP clock
 
-The `PtpClock` class implements a PTP hardware clock that produces IEEE 1588 format 96 and 64 bit PTP timestamps.
+The `PtpClock` class implements a PTP hardware clock that produces IEEE 1588 format 96-bit time-of-day and 64-bit relative PTP timestamps.
 
 To use this module, import it and connect it to the DUT:
 
     from cocotbext.eth import PtpClock
 
     ptp_clock = PtpClock(
-        ts_96=dut.ts_96,
-        ts_64=dut.ts_64,
+        ts_tod=dut.ts_tod,
+        ts_rel=dut.ts_rel,
         ts_step=dut.ts_step,
         pps=dut.pps,
         clock=dut.clk,
@@ -596,17 +603,21 @@ To use this module, import it and connect it to the DUT:
 
 Once the clock is instantiated, it will generate a continuous stream of monotonically increasing PTP timestamps on every clock edge.
 
+Internally, the `PtpClock` module uses 32-bit fractional ns fields for higher frequency resolution.  Only the upper 16 bits are returned in the timestamps, but the full fns value can be accessed with the _ts_tod_fns_ and _ts_rel_fns_ attributes.
+
+All APIs that handle fractional values use the `Decimal` type for maximum precision, as the combination of timestamp range and resolution is usually too much for normal floating point numbers to handle without significant loss of precision.
+
 #### Signals
 
-* `ts_96`: 96-bit timestamp (48 bit seconds, 32 bit ns, 16 bit fractional ns)
-* `ts_64`: 64-bit timestamp (48 bit ns, 16 bit fractional ns)
+* `ts_tod`: 96-bit time-of-day timestamp (48 bit seconds, 32 bit ns, 16 bit fractional ns)
+* `ts_rel`: 64-bit relative timestamp (48 bit ns, 16 bit fractional ns)
 * `ts_step`: step output, pulsed when non-monotonic step occurs
-* `pps`: pulse-per-second output, pulsed when ts_96 seconds field increments
+* `pps`: pulse-per-second output, pulsed when ts_tod seconds field increments
 
 #### Constructor parameters:
 
-* _ts_96_: 96-bit timestamp signal (optional)
-* _ts_64_: 64-bit timestamp signal (optional)
+* _ts_tod_: 96-bit time-of-day timestamp signal (optional)
+* _ts_rel_: 64-bit relative timestamp signal (optional)
 * _ts_step_: timestamp step signal (optional)
 * _pps_: pulse-per-second signal (optional)
 * _clock_: clock
@@ -616,74 +627,84 @@ Once the clock is instantiated, it will generate a continuous stream of monotoni
 
 #### Attributes:
 
-* _ts_96_s_: current 96-bit timestamp seconds field
-* _ts_96_ns_: current 96-bit timestamp ns field
-* _ts_96_fns_: current 96-bit timestamp fractional ns field
-* _ts_64_ns_: current 64-bit timestamp ns field
-* _ts_64_fns_: current 64-bit timestamp fractional ns field
+* _ts_tod_s_: current 96-bit ToD timestamp seconds field
+* _ts_tod_ns_: current 96-bit ToD timestamp ns field
+* _ts_tod_fns_: current 96-bit ToD timestamp fractional ns field
+* _ts_rel_ns_: current 64-bit relative timestamp ns field
+* _ts_rel_fns_: current 64-bit relative timestamp fractional ns field
 
 #### Methods
 
 * `set_period(ns, fns)`: set clock period from separate fields
-* `set_drift(ns, fns, rate)`: set clock drift from separate fields
-* `set_period_ns(t)`: set clock period in ns (float)
-* `get_period_ns()`: return current clock period in ns (float)
-* `set_ts_96(ts_s, ts_ns=None, ts_fns=None)`: set 96-bit timestamp from integer or from separate fields
-* `set_ts_96_ns(t)`: set 96-bit timestamp from ns (float)
-* `set_ts_96_s(t)`: set 96-bit timestamp from seconds (float)
-* `get_ts_96()`: return current 96-bit timestamp as an integer
-* `get_ts_96_ns()`: return current 96-bit timestamp in ns (float)
-* `get_ts_96_s()`: return current 96-bit timestamp in seconds (float)
-* `set_ts_64(ts_ns, ts_fns=None)`: set 64-bit timestamp from integer or from separate fields
-* `set_ts_64_ns(t)`: set 64-bit timestamp from ns (float)
-* `set_ts_64_s(t)`: set 64-bit timestamp from seconds (float)
-* `get_ts_64()`: return current 64-bit timestamp as an integer
-* `get_ts_64_ns()`: return current 64-bit timestamp in ns (float)
-* `get_ts_64_s()`: return current 64-bit timestamp in seconds (float)
+* `set_drift(num, denom)`: set clock drift from separate fields
+* `set_period_ns(t)`: set clock period and drift in ns (Decimal)
+* `get_period_ns()`: return current clock period in ns (Decimal)
+* `set_ts_tod(ts_s, ts_ns, ts_fns)`: set 96-bit ToD timestamp from separate fields
+* `set_ts_tod_96(ts)`: set 96-bit ToD timestamp from integer
+* `set_ts_tod_ns(t)`: set 96-bit ToD timestamp from ns (Decimal)
+* `set_ts_tod_s(t)`: set 96-bit ToD timestamp from seconds (Decimal)
+* `set_ts_tod_sim_time()`: set 96-bit ToD timestamp from sim time
+* `get_ts_tod()`: return current 96-bit ToD timestamp as separate fields
+* `get_ts_tod_96()`: return current 96-bit ToD timestamp as an integer
+* `get_ts_tod_ns()`: return current 96-bit ToD timestamp in ns (Decimal)
+* `get_ts_tod_s()`: return current 96-bit ToD timestamp in seconds (Decimal)
+* `set_ts_rel(ts_ns, ts_fns)`: set 64-bit relative timestamp from separate fields
+* `set_ts_rel_64(ts)`: set 64-bit relative timestamp from integer
+* `set_ts_rel_ns(t)`: set 64-bit relative timestamp from ns (Decimal)
+* `set_ts_rel_s(t)`: set 64-bit relative timestamp from seconds (Decimal)
+* `set_ts_rel_sim_time()`: set 64-bit relative timestamp from sim time
+* `get_ts_rel()`: return current 64-bit relative timestamp as separate fields
+* `get_ts_rel_64()`: return current 64-bit relative timestamp as an integer
+* `get_ts_rel_ns()`: return current 64-bit relative timestamp in ns (Decimal)
+* `get_ts_rel_s()`: return current 64-bit relative timestamp in seconds (Decimal)
 
 ### PTP clock (sim time)
 
-The `PtpClockSimTime` class implements a PTP hardware clock that produces IEEE 1588 format 96 and 64 bit PTP timestamps, derived from the current simulation time.  This module can be used in place of `PtpClock` so that captured PTP timestamps can be easily compared to captured simulation time.
+The `PtpClockSimTime` class implements a PTP hardware clock that produces IEEE 1588 format 96-bit time-of-day and 64-bit relative PTP timestamps, derived from the current simulation time.  This module can be used in place of `PtpClock` so that captured PTP timestamps can be easily compared to captured simulation time.
 
 To use this module, import it and connect it to the DUT:
 
     from cocotbext.eth import PtpClockSimTime
 
     ptp_clock = PtpClockSimTime(
-        ts_96=dut.ts_96,
-        ts_64=dut.ts_64,
+        ts_tod=dut.ts_tod,
+        ts_rel=dut.ts_rel,
         pps=dut.pps,
         clock=dut.clk
     )
 
 Once the clock is instantiated, it will generate a continuous stream of monotonically increasing PTP timestamps on every clock edge.
 
+All APIs that handle fractional values use the `Decimal` type for maximum precision, as the combination of timestamp range and resolution is usually too much for normal floating point numbers to handle without significant loss of precision.
+
 #### Signals
 
-* `ts_96`: 96-bit timestamp (48 bit seconds, 32 bit ns, 16 bit fractional ns)
-* `ts_64`: 64-bit timestamp (48 bit ns, 16 bit fractional ns)
-* `pps`: pulse-per-second output, pulsed when ts_96 seconds field increments
+* `ts_tod`: 96-bit time-of-day timestamp (48 bit seconds, 32 bit ns, 16 bit fractional ns)
+* `ts_rel`: 64-bit relative timestamp (48 bit ns, 16 bit fractional ns)
+* `pps`: pulse-per-second output, pulsed when ts_tod seconds field increments
 
 #### Constructor parameters:
 
-* _ts_96_: 96-bit timestamp signal (optional)
-* _ts_64_: 64-bit timestamp signal (optional)
+* _ts_tod_: 96-bit time-of-day timestamp signal (optional)
+* _ts_rel_: 64-bit relative timestamp signal (optional)
 * _pps_: pulse-per-second signal (optional)
 * _clock_: clock
 
 #### Attributes:
 
-* _ts_96_s_: current 96-bit timestamp seconds field
-* _ts_96_ns_: current 96-bit timestamp ns field
-* _ts_96_fns_: current 96-bit timestamp fractional ns field
-* _ts_64_ns_: current 64-bit timestamp ns field
-* _ts_64_fns_: current 64-bit timestamp fractional ns field
+* _ts_tod_s_: current 96-bit ToD timestamp seconds field
+* _ts_tod_ns_: current 96-bit ToD timestamp ns field
+* _ts_tod_fns_: current 96-bit ToD timestamp fractional ns field
+* _ts_rel_ns_: current 64-bit relative timestamp ns field
+* _ts_rel_fns_: current 64-bit relative timestamp fractional ns field
 
 #### Methods
 
-* `get_ts_96()`: return current 96-bit timestamp as an integer
-* `get_ts_96_ns()`: return current 96-bit timestamp in ns (float)
-* `get_ts_96_s()`: return current 96-bit timestamp in seconds (float)
-* `get_ts_64()`: return current 64-bit timestamp as an integer
-* `get_ts_64_ns()`: return current 64-bit timestamp in ns (float)
-* `get_ts_64_s()`: return current 64-bit timestamp in seconds (float)
+* `get_ts_tod()`: return current 96-bit ToD timestamp as separate fields
+* `get_ts_tod_96()`: return current 96-bit ToD timestamp as an integer
+* `get_ts_tod_ns()`: return current 96-bit ToD timestamp in ns (Decimal)
+* `get_ts_tod_s()`: return current 96-bit ToD timestamp in seconds (Decimal)
+* `get_ts_rel()`: return current 64-bit relative timestamp as separate fields
+* `get_ts_rel_96()`: return current 64-bit relative timestamp as an integer
+* `get_ts_rel_ns()`: return current 64-bit relative timestamp in ns (Decimal)
+* `get_ts_rel_s()`: return current 64-bit relative timestamp in seconds (Decimal)

cocotbext/eth/__init__.py

@@ -1,6 +1,6 @@
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

cocotbext/eth/constants.py

@@ -1,6 +1,6 @@
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -42,12 +42,12 @@ class XgmiiCtrl(enum.IntEnum):
     TERM   = 0xfd
     ERROR  = 0xfe
     SEQ_OS = 0x9c
-    RES0   = 0x1c
-    RES1   = 0x3c
-    RES2   = 0x7c
-    RES3   = 0xbc
-    RES4   = 0xdc
-    RES5   = 0xf7
+    RES_0  = 0x1c
+    RES_1  = 0x3c
+    RES_2  = 0x7c
+    RES_3  = 0xbc
+    RES_4  = 0xdc
+    RES_5  = 0xf7
     SIG_OS = 0x5c
 
 
@@ -93,3 +93,41 @@ class BaseRBlockType(enum.IntEnum):
     TERM_5   = 0xd2  # C7 C6    D4 D3 D2 D1 D0 BT
     TERM_6   = 0xe1  # C7    D5 D4 D3 D2 D1 D0 BT
     TERM_7   = 0xff  #    D6 D5 D4 D3 D2 D1 D0 BT
+
+
+xgmii_ctrl_to_baser_mapping = {
+    XgmiiCtrl.IDLE:   BaseRCtrl.IDLE,
+    XgmiiCtrl.LPI:    BaseRCtrl.LPI,
+    XgmiiCtrl.ERROR:  BaseRCtrl.ERROR,
+    XgmiiCtrl.RES_0:  BaseRCtrl.RES_0,
+    XgmiiCtrl.RES_1:  BaseRCtrl.RES_1,
+    XgmiiCtrl.RES_2:  BaseRCtrl.RES_2,
+    XgmiiCtrl.RES_3:  BaseRCtrl.RES_3,
+    XgmiiCtrl.RES_4:  BaseRCtrl.RES_4,
+    XgmiiCtrl.RES_5:  BaseRCtrl.RES_5,
+}
+
+
+baser_ctrl_to_xgmii_mapping = {
+    BaseRCtrl.IDLE:   XgmiiCtrl.IDLE,
+    BaseRCtrl.LPI:    XgmiiCtrl.LPI,
+    BaseRCtrl.ERROR:  XgmiiCtrl.ERROR,
+    BaseRCtrl.RES_0:  XgmiiCtrl.RES_0,
+    BaseRCtrl.RES_1:  XgmiiCtrl.RES_1,
+    BaseRCtrl.RES_2:  XgmiiCtrl.RES_2,
+    BaseRCtrl.RES_3:  XgmiiCtrl.RES_3,
+    BaseRCtrl.RES_4:  XgmiiCtrl.RES_4,
+    BaseRCtrl.RES_5:  XgmiiCtrl.RES_5,
+}
+
+
+block_type_term_lane_mapping = {
+    BaseRBlockType.TERM_0:  0,
+    BaseRBlockType.TERM_1:  1,
+    BaseRBlockType.TERM_2:  2,
+    BaseRBlockType.TERM_3:  3,
+    BaseRBlockType.TERM_4:  4,
+    BaseRBlockType.TERM_5:  5,
+    BaseRBlockType.TERM_6:  6,
+    BaseRBlockType.TERM_7:  7,
+}

cocotbext/eth/eth_mac.py

@@ -1,6 +1,6 @@
 """
 
-Copyright (c) 2021 Alex Forencich
+Copyright (c) 2021-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -43,23 +43,25 @@ AxiStreamBus, AxiStreamTransaction, AxiStreamSource, AxiStreamSink, AxiStreamMon
 
 
 class EthMacFrame:
-    def __init__(self, data=None, tx_complete=None):
-        self.data = bytearray()
+    def __init__(self, data=b'', tx_complete=None):
+        self.data = b''
         self.sim_time_start = None
         self.sim_time_sfd = None
         self.sim_time_end = None
         self.ptp_timestamp = None
+        self.ptp_tag = None
         self.tx_complete = None
 
         if type(data) is EthMacFrame:
-            self.data = bytearray(data.data)
+            self.data = bytes(data.data)
             self.sim_time_start = data.sim_time_start
             self.sim_time_sfd = data.sim_time_sfd
             self.sim_time_end = data.sim_time_end
             self.ptp_timestamp = data.ptp_timestamp
+            self.ptp_tag = data.ptp_tag
             self.tx_complete = data.tx_complete
         else:
-            self.data = bytearray(data)
+            self.data = bytes(data)
 
         if tx_complete is not None:
             self.tx_complete = tx_complete
@@ -104,7 +106,8 @@ class EthMacFrame:
             f"sim_time_start={self.sim_time_start!r}, "
             f"sim_time_sfd={self.sim_time_sfd!r}, "
             f"sim_time_end={self.sim_time_end!r}, "
-            f"ptp_timestamp={self.ptp_timestamp!r})"
+            f"ptp_timestamp={self.ptp_timestamp!r}, "
+            f"ptp_tag={self.ptp_tag!r})"
         )
 
     def __len__(self):
@@ -118,7 +121,7 @@ class EthMacFrame:
 
 
 class EthMacTx(Reset):
-    def __init__(self, bus, clock, reset=None, ptp_time=None, ptp_ts=None, ptp_ts_valid=None,
+    def __init__(self, bus, clock, reset=None, ptp_time=None, ptp_ts=None, ptp_ts_tag=None, ptp_ts_valid=None,
             reset_active_level=True, ifg=12, speed=1000e6, *args, **kwargs):
 
         self.bus = bus
@@ -126,14 +129,18 @@ class EthMacTx(Reset):
         self.reset = reset
         self.ptp_time = ptp_time
         self.ptp_ts = ptp_ts
+        self.ptp_ts_tag = ptp_ts_tag
         self.ptp_ts_valid = ptp_ts_valid
         self.ifg = ifg
         self.speed = speed
+        if bus._name:
             self.log = logging.getLogger(f"cocotb.{bus._entity._name}.{bus._name}")
+        else:
+            self.log = logging.getLogger(f"cocotb.{bus._entity._name}")
 
         self.log.info("Ethernet MAC TX model")
         self.log.info("cocotbext-eth version %s", __version__)
-        self.log.info("Copyright (c) 2020 Alex Forencich")
+        self.log.info("Copyright (c) 2021-2025 Alex Forencich")
         self.log.info("https://github.com/alexforencich/cocotbext-eth")
 
         super().__init__(*args, **kwargs)
@@ -172,6 +179,10 @@ class EthMacTx(Reset):
             self.log.info("  tuser width: %d bits", len(self.bus.tuser))
         else:
             self.log.info("  tuser: not present")
+        if self.ptp_time is not None:
+            self.log.info("  ptp_time width: %d bits", len(self.ptp_time))
+        else:
+            self.log.info("  ptp_time: not present")
 
         if self.bus.tready is None:
             raise ValueError("tready is required")
@@ -183,9 +194,11 @@ class EthMacTx(Reset):
             raise ValueError(f"Bus does not evenly divide into byte lanes "
                 f"({self.byte_lanes} * {self.byte_size} != {self.width})")
 
-        if self.ptp_ts:
+        if self.ptp_ts is not None:
             self.ptp_ts.setimmediatevalue(0)
-        if self.ptp_ts_valid:
+        if self.ptp_ts_tag is not None:
+            self.ptp_ts_tag.setimmediatevalue(0)
+        if self.ptp_ts_valid is not None:
             self.ptp_ts_valid.setimmediatevalue(0)
 
         self._run_cr = None
@@ -242,8 +255,8 @@ class EthMacTx(Reset):
                 self._run_ts_cr.kill()
                 self._run_ts_cr = None
 
-            if self.ptp_ts_valid:
-                self.ptp_ts_valid <= 0
+            if self.ptp_ts_valid is not None:
+                self.ptp_ts_valid.value = 0
 
             self.active = False
 
@@ -252,9 +265,9 @@ class EthMacTx(Reset):
         else:
             self.log.info("Reset de-asserted")
             if self._run_cr is None:
-                self._run_cr = cocotb.fork(self._run())
-            if self._run_ts_cr is None and self.ptp_ts:
-                self._run_ts_cr = cocotb.fork(self._run_ts())
+                self._run_cr = cocotb.start_soon(self._run())
+            if self._run_ts_cr is None and self.ptp_ts is not None:
+                self._run_ts_cr = cocotb.start_soon(self._run_ts())
 
     async def _run(self):
         frame = None
@@ -264,7 +277,9 @@ class EthMacTx(Reset):
             # wait for data
             cycle = await self.stream.recv()
 
-            frame = EthMacFrame(bytearray())
+            frame = EthMacFrame()
+            data = bytearray()
+
             frame.sim_time_start = get_sim_time()
 
             # wait for preamble time
@@ -272,23 +287,25 @@ class EthMacTx(Reset):
 
             frame.sim_time_sfd = get_sim_time()
 
-            if self.ptp_time:
-                frame.ptp_timestamp = self.ptp_time.value.integer
-                self.ts_queue.put_nowait(frame.ptp_timestamp)
+            if self.ptp_time is not None:
+                frame.ptp_timestamp = int(self.ptp_time.value)
+                frame.ptp_tag = int(cycle.tuser) >> 1
+                self.ts_queue.put_nowait((frame.ptp_timestamp, frame.ptp_tag))
 
             # process frame data
             while True:
                 byte_count = 0
 
                 for offset in range(self.byte_lanes):
-                    if not hasattr(self.bus, "tkeep") or (cycle.tkeep.integer >> offset) & 1:
-                        frame.data.append((cycle.tdata.integer >> (offset * self.byte_size)) & self.byte_mask)
+                    if not hasattr(self.bus, "tkeep") or (int(cycle.tkeep) >> offset) & 1:
+                        data.append((int(cycle.tdata) >> (offset * self.byte_size)) & self.byte_mask)
                         byte_count += 1
 
                 # wait for serialization time
                 await Timer(self.time_scale*byte_count*8//self.speed, 'step')
 
-                if cycle.tlast.integer:
+                if int(cycle.tlast):
+                    frame.data = bytes(data)
                     frame.sim_time_end = get_sim_time()
                     self.log.info("RX frame: %s", frame)
 
@@ -311,14 +328,18 @@ class EthMacTx(Reset):
             await Timer(self.time_scale*self.ifg*8//self.speed, 'step')
 
     async def _run_ts(self):
+        clock_edge_event = RisingEdge(self.clock)
+
         while True:
-            await RisingEdge(self.clock)
-            self.ptp_ts_valid <= 0
+            await clock_edge_event
+            self.ptp_ts_valid.value = 0
 
             if not self.ts_queue.empty():
-                ts = self.ts_queue.get_nowait()
-                self.ptp_ts <= ts
-                self.ptp_ts_valid <= 1
+                ts, tag = self.ts_queue.get_nowait()
+                self.ptp_ts.value = ts
+                if self.ptp_ts_tag is not None:
+                    self.ptp_ts_tag.value = tag
+                self.ptp_ts_valid.value = 1
 
 
 class EthMacRx(Reset):
@@ -331,11 +352,14 @@ class EthMacRx(Reset):
         self.ptp_time = ptp_time
         self.ifg = ifg
         self.speed = speed
+        if bus._name:
             self.log = logging.getLogger(f"cocotb.{bus._entity._name}.{bus._name}")
+        else:
+            self.log = logging.getLogger(f"cocotb.{bus._entity._name}")
 
         self.log.info("Ethernet MAC RX model")
         self.log.info("cocotbext-eth version %s", __version__)
-        self.log.info("Copyright (c) 2020 Alex Forencich")
+        self.log.info("Copyright (c) 2021-2025 Alex Forencich")
         self.log.info("https://github.com/alexforencich/cocotbext-eth")
 
         super().__init__(*args, **kwargs)
@@ -378,6 +402,10 @@ class EthMacRx(Reset):
             self.log.info("  tuser width: %d bits", len(self.bus.tuser))
         else:
             self.log.info("  tuser: not present")
+        if self.ptp_time is not None:
+            self.log.info("  ptp_time width: %d bits", len(self.ptp_time))
+        else:
+            self.log.info("  ptp_time: not present")
 
         if self.byte_size != 8:
             raise ValueError("Byte size must be 8")
@@ -458,10 +486,11 @@ class EthMacRx(Reset):
         else:
             self.log.info("Reset de-asserted")
             if self._run_cr is None:
-                self._run_cr = cocotb.fork(self._run())
+                self._run_cr = cocotb.start_soon(self._run())
 
     async def _run(self):
         frame = None
+        frame_offset = 0
         tuser = 0
         self.active = False
 
@@ -477,14 +506,15 @@ class EthMacRx(Reset):
             frame.sim_time_sfd = None
             frame.sim_time_end = None
             self.log.info("TX frame: %s", frame)
+            frame_offset = 0
 
             # wait for preamble time
             await Timer(self.time_scale*8*8//self.speed, 'step')
 
             frame.sim_time_sfd = get_sim_time()
 
-            if self.ptp_time:
-                frame.ptp_timestamp = self.ptp_time.value.integer
+            if self.ptp_time is not None:
+                frame.ptp_timestamp = int(self.ptp_time.value)
                 tuser |= frame.ptp_timestamp << 1
 
             # process frame data
@@ -499,11 +529,12 @@ class EthMacRx(Reset):
                 cycle.tuser = tuser
 
                 for offset in range(self.byte_lanes):
-                    cycle.tdata |= (frame.data.pop(0) & self.byte_mask) << (offset * self.byte_size)
+                    cycle.tdata |= (frame.data[frame_offset] & self.byte_mask) << (offset * self.byte_size)
                     cycle.tkeep |= 1 << offset
                     byte_count += 1
+                    frame_offset += 1
 
-                    if len(frame.data) == 0:
+                    if frame_offset >= len(frame.data):
                         cycle.tlast = 1
                         frame.sim_time_end = get_sim_time()
                         frame.handle_tx_complete()
@@ -521,13 +552,13 @@ class EthMacRx(Reset):
 
 
 class EthMac:
-    def __init__(self, tx_bus=None, tx_clk=None, tx_rst=None, tx_ptp_time=None, tx_ptp_ts=None, tx_ptp_ts_valid=None,
-            rx_bus=None, rx_clk=None, rx_rst=None, rx_ptp_time=None,
+    def __init__(self, tx_bus=None, tx_clk=None, tx_rst=None, tx_ptp_time=None, tx_ptp_ts=None, tx_ptp_ts_tag=None,
+            tx_ptp_ts_valid=None, rx_bus=None, rx_clk=None, rx_rst=None, rx_ptp_time=None,
             reset_active_level=True, ifg=12, speed=1000e6, *args, **kwargs):
 
         super().__init__(*args, **kwargs)
 
-        self.tx = EthMacTx(tx_bus, tx_clk, tx_rst, tx_ptp_time, tx_ptp_ts, tx_ptp_ts_valid,
+        self.tx = EthMacTx(tx_bus, tx_clk, tx_rst, tx_ptp_time, tx_ptp_ts, tx_ptp_ts_tag, tx_ptp_ts_valid,
             reset_active_level=reset_active_level, ifg=ifg, speed=speed)
         self.rx = EthMacRx(rx_bus, rx_clk, rx_rst, rx_ptp_time,
             reset_active_level=reset_active_level, ifg=ifg, speed=speed)

cocotbext/eth/gmii.py

@@ -1,6 +1,6 @@
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -146,7 +146,7 @@ class GmiiSource(Reset):
 
         self.log.info("GMII source")
         self.log.info("cocotbext-eth version %s", __version__)
-        self.log.info("Copyright (c) 2020 Alex Forencich")
+        self.log.info("Copyright (c) 2020-2025 Alex Forencich")
         self.log.info("https://github.com/alexforencich/cocotbext-eth")
 
         super().__init__(*args, **kwargs)
@@ -157,6 +157,7 @@ class GmiiSource(Reset):
         self.current_frame = None
         self.idle_event = Event()
         self.idle_event.set()
+        self.active_event = Event()
 
         self.ifg = 12
         self.mii_mode = False
@@ -189,6 +190,7 @@ class GmiiSource(Reset):
         frame = GmiiFrame(frame)
         await self.queue.put(frame)
         self.idle_event.clear()
+        self.active_event.set()
         self.queue_occupancy_bytes += len(frame)
         self.queue_occupancy_frames += 1
 
@@ -198,6 +200,7 @@ class GmiiSource(Reset):
         frame = GmiiFrame(frame)
         self.queue.put_nowait(frame)
         self.idle_event.clear()
+        self.active_event.set()
         self.queue_occupancy_bytes += len(frame)
         self.queue_occupancy_frames += 1
 
@@ -225,6 +228,7 @@ class GmiiSource(Reset):
             frame.handle_tx_complete()
         self.dequeue_event.set()
         self.idle_event.set()
+        self.active_event.clear()
         self.queue_occupancy_bytes = 0
         self.queue_occupancy_frames = 0
 
@@ -239,10 +243,10 @@ class GmiiSource(Reset):
                 self._run_cr = None
 
             self.active = False
-            self.data <= 0
+            self.data.value = 0
             if self.er is not None:
-                self.er <= 0
-            self.dv <= 0
+                self.er.value = 0
+            self.dv.value = 0
 
             if self.current_frame:
                 self.log.warning("Flushed transmit frame during reset: %s", self.current_frame)
@@ -251,20 +255,30 @@ class GmiiSource(Reset):
 
             if self.queue.empty():
                 self.idle_event.set()
+                self.active_event.clear()
         else:
             self.log.info("Reset de-asserted")
             if self._run_cr is None:
-                self._run_cr = cocotb.fork(self._run())
+                self._run_cr = cocotb.start_soon(self._run())
 
     async def _run(self):
         frame = None
+        frame_offset = 0
+        frame_data = None
+        frame_error = None
         ifg_cnt = 0
         self.active = False
 
-        while True:
-            await RisingEdge(self.clock)
+        clock_edge_event = RisingEdge(self.clock)
 
-            if self.enable is None or self.enable.value:
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
+        while True:
+            await clock_edge_event
+
+            if self.enable is None or int(self.enable.value):
                 if ifg_cnt > 0:
                     # in IFG
                     ifg_cnt -= 1
@@ -283,43 +297,54 @@ class GmiiSource(Reset):
                     frame.normalize()
 
                     if self.mii_select is not None:
-                        self.mii_mode = bool(self.mii_select.value.integer)
+                        self.mii_mode = bool(int(self.mii_select.value))
 
                     if self.mii_mode:
-                        mii_data = []
-                        mii_error = []
+                        # convert to MII
+                        frame_data = []
+                        frame_error = []
                         for b, e in zip(frame.data, frame.error):
-                            mii_data.append(b & 0x0F)
-                            mii_data.append(b >> 4)
-                            mii_error.append(e)
-                            mii_error.append(e)
-                        frame.data = mii_data
-                        frame.error = mii_error
+                            frame_data.append(b & 0x0F)
+                            frame_data.append(b >> 4)
+                            frame_error.append(e)
+                            frame_error.append(e)
+                    else:
+                        frame_data = frame.data
+                        frame_error = frame.error
 
                     self.active = True
+                    frame_offset = 0
 
                 if frame is not None:
-                    d = frame.data.pop(0)
+                    d = frame_data[frame_offset]
                     if frame.sim_time_sfd is None and d in (EthPre.SFD, 0xD):
                         frame.sim_time_sfd = get_sim_time()
-                    self.data <= d
+                    self.data.value = d
                     if self.er is not None:
-                        self.er <= frame.error.pop(0)
-                    self.dv <= 1
+                        self.er.value = frame_error[frame_offset]
+                    self.dv.value = 1
+                    frame_offset += 1
 
-                    if not frame.data:
+                    if frame_offset >= len(frame_data):
                         ifg_cnt = max(self.ifg, 1)
                         frame.sim_time_end = get_sim_time()
                         frame.handle_tx_complete()
                         frame = None
                         self.current_frame = None
                 else:
-                    self.data <= 0
+                    self.data.value = 0
                     if self.er is not None:
-                        self.er <= 0
-                    self.dv <= 0
+                        self.er.value = 0
+                    self.dv.value = 0
                     self.active = False
+
+                    if ifg_cnt == 0 and self.queue.empty():
                         self.idle_event.set()
+                        self.active_event.clear()
+                        await self.active_event.wait()
+
+            elif self.enable is not None and not self.enable.value:
+                await enable_event
 
 
 class GmiiSink(Reset):
@@ -336,7 +361,7 @@ class GmiiSink(Reset):
 
         self.log.info("GMII sink")
         self.log.info("cocotbext-eth version %s", __version__)
-        self.log.info("Copyright (c) 2020 Alex Forencich")
+        self.log.info("Copyright (c) 2020-2025 Alex Forencich")
         self.log.info("https://github.com/alexforencich/cocotbext-eth")
 
         super().__init__(*args, **kwargs)
@@ -415,19 +440,27 @@ class GmiiSink(Reset):
         else:
             self.log.info("Reset de-asserted")
             if self._run_cr is None:
-                self._run_cr = cocotb.fork(self._run())
+                self._run_cr = cocotb.start_soon(self._run())
 
     async def _run(self):
         frame = None
         self.active = False
 
-        while True:
-            await RisingEdge(self.clock)
+        clock_edge_event = RisingEdge(self.clock)
 
-            if self.enable is None or self.enable.value:
-                d_val = self.data.value.integer
-                dv_val = self.dv.value.integer
-                er_val = 0 if self.er is None else self.er.value.integer
+        active_event = RisingEdge(self.dv)
+
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
+        while True:
+            await clock_edge_event
+
+            if self.enable is None or int(self.enable.value):
+                d_val = int(self.data.value)
+                dv_val = int(self.dv.value)
+                er_val = 0 if self.er is None else int(self.er.value)
 
                 if frame is None:
                     if dv_val:
@@ -439,7 +472,7 @@ class GmiiSink(Reset):
                         # end of frame
 
                         if self.mii_select is not None:
-                            self.mii_mode = bool(self.mii_select.value.integer)
+                            self.mii_mode = bool(int(self.mii_select.value))
 
                         if self.mii_mode:
                             odd = True
@@ -481,6 +514,12 @@ class GmiiSink(Reset):
                     frame.data.append(d_val)
                     frame.error.append(er_val)
 
+                if not dv_val:
+                    await active_event
+
+            elif self.enable is not None and not self.enable.value:
+                await enable_event
+
 
 class GmiiPhy:
     def __init__(self, txd, tx_er, tx_en, tx_clk, gtx_clk, rxd, rx_er, rx_dv, rx_clk,
@@ -510,12 +549,12 @@ class GmiiPhy:
             self._clock_cr.kill()
 
         if self.speed == 1000e6:
-            self._clock_cr = cocotb.fork(self._run_clocks(8*1e9/self.speed))
+            self._clock_cr = cocotb.start_soon(self._run_clocks(8*1e9/self.speed))
             self.tx.mii_mode = False
             self.rx.mii_mode = False
             self.tx.clock = self.gtx_clk
         else:
-            self._clock_cr = cocotb.fork(self._run_clocks(4*1e9/self.speed))
+            self._clock_cr = cocotb.start_soon(self._run_clocks(4*1e9/self.speed))
             self.tx.mii_mode = True
             self.rx.mii_mode = True
             self.tx.clock = self.tx_clk
@@ -529,8 +568,8 @@ class GmiiPhy:
 
         while True:
             await t
-            self.rx_clk <= 1
-            self.tx_clk <= 1
+            self.rx_clk.value = 1
+            self.tx_clk.value = 1
             await t
-            self.rx_clk <= 0
-            self.tx_clk <= 0
+            self.rx_clk.value = 0
+            self.tx_clk.value = 0

cocotbext/eth/mii.py

@@ -1,6 +1,6 @@
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -48,7 +48,7 @@ class MiiSource(Reset):
 
         self.log.info("MII source")
         self.log.info("cocotbext-eth version %s", __version__)
-        self.log.info("Copyright (c) 2020 Alex Forencich")
+        self.log.info("Copyright (c) 2020-2025 Alex Forencich")
         self.log.info("https://github.com/alexforencich/cocotbext-eth")
 
         super().__init__(*args, **kwargs)
@@ -59,6 +59,7 @@ class MiiSource(Reset):
         self.current_frame = None
         self.idle_event = Event()
         self.idle_event.set()
+        self.active_event = Event()
 
         self.ifg = 12
 
@@ -90,6 +91,7 @@ class MiiSource(Reset):
         frame = GmiiFrame(frame)
         await self.queue.put(frame)
         self.idle_event.clear()
+        self.active_event.set()
         self.queue_occupancy_bytes += len(frame)
         self.queue_occupancy_frames += 1
 
@@ -99,6 +101,7 @@ class MiiSource(Reset):
         frame = GmiiFrame(frame)
         self.queue.put_nowait(frame)
         self.idle_event.clear()
+        self.active_event.set()
         self.queue_occupancy_bytes += len(frame)
         self.queue_occupancy_frames += 1
 
@@ -126,6 +129,7 @@ class MiiSource(Reset):
             frame.handle_tx_complete()
         self.dequeue_event.set()
         self.idle_event.set()
+        self.active_event.clear()
         self.queue_occupancy_bytes = 0
         self.queue_occupancy_frames = 0
 
@@ -140,10 +144,10 @@ class MiiSource(Reset):
                 self._run_cr = None
 
             self.active = False
-            self.data <= 0
+            self.data.value = 0
             if self.er is not None:
-                self.er <= 0
-            self.dv <= 0
+                self.er.value = 0
+            self.dv.value = 0
 
             if self.current_frame:
                 self.log.warning("Flushed transmit frame during reset: %s", self.current_frame)
@@ -152,20 +156,30 @@ class MiiSource(Reset):
 
             if self.queue.empty():
                 self.idle_event.set()
+                self.active_event.clear()
         else:
             self.log.info("Reset de-asserted")
             if self._run_cr is None:
-                self._run_cr = cocotb.fork(self._run())
+                self._run_cr = cocotb.start_soon(self._run())
 
     async def _run(self):
         frame = None
+        frame_offset = 0
+        frame_data = None
+        frame_error = None
         ifg_cnt = 0
         self.active = False
 
-        while True:
-            await RisingEdge(self.clock)
+        clock_edge_event = RisingEdge(self.clock)
 
-            if self.enable is None or self.enable.value:
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
+        while True:
+            await clock_edge_event
+
+            if self.enable is None or int(self.enable.value):
                 if ifg_cnt > 0:
                     # in IFG
                     ifg_cnt -= 1
@@ -183,40 +197,48 @@ class MiiSource(Reset):
                     self.log.info("TX frame: %s", frame)
                     frame.normalize()
 
-                    mii_data = []
-                    mii_error = []
+                    # convert to MII
+                    frame_data = []
+                    frame_error = []
                     for b, e in zip(frame.data, frame.error):
-                        mii_data.append(b & 0x0F)
-                        mii_data.append(b >> 4)
-                        mii_error.append(e)
-                        mii_error.append(e)
-                    frame.data = mii_data
-                    frame.error = mii_error
+                        frame_data.append(b & 0x0F)
+                        frame_data.append(b >> 4)
+                        frame_error.append(e)
+                        frame_error.append(e)
 
                     self.active = True
+                    frame_offset = 0
 
                 if frame is not None:
-                    d = frame.data.pop(0)
+                    d = frame_data[frame_offset]
                     if frame.sim_time_sfd is None and d == 0xD:
                         frame.sim_time_sfd = get_sim_time()
-                    self.data <= d
+                    self.data.value = d
                     if self.er is not None:
-                        self.er <= frame.error.pop(0)
-                    self.dv <= 1
+                        self.er.value = frame_error[frame_offset]
+                    self.dv.value = 1
+                    frame_offset += 1
 
-                    if not frame.data:
+                    if frame_offset >= len(frame_data):
                         ifg_cnt = max(self.ifg, 1)
                         frame.sim_time_end = get_sim_time()
                         frame.handle_tx_complete()
                         frame = None
                         self.current_frame = None
                 else:
-                    self.data <= 0
+                    self.data.value = 0
                     if self.er is not None:
-                        self.er <= 0
-                    self.dv <= 0
+                        self.er.value = 0
+                    self.dv.value = 0
                     self.active = False
+
+                    if ifg_cnt == 0 and self.queue.empty():
                         self.idle_event.set()
+                        self.active_event.clear()
+                        await self.active_event.wait()
+
+            elif self.enable is not None and not self.enable.value:
+                await enable_event
 
 
 class MiiSink(Reset):
@@ -232,7 +254,7 @@ class MiiSink(Reset):
 
         self.log.info("MII sink")
         self.log.info("cocotbext-eth version %s", __version__)
-        self.log.info("Copyright (c) 2020 Alex Forencich")
+        self.log.info("Copyright (c) 2020-2025 Alex Forencich")
         self.log.info("https://github.com/alexforencich/cocotbext-eth")
 
         super().__init__(*args, **kwargs)
@@ -309,19 +331,27 @@ class MiiSink(Reset):
         else:
             self.log.info("Reset de-asserted")
             if self._run_cr is None:
-                self._run_cr = cocotb.fork(self._run())
+                self._run_cr = cocotb.start_soon(self._run())
 
     async def _run(self):
         frame = None
         self.active = False
 
-        while True:
-            await RisingEdge(self.clock)
+        clock_edge_event = RisingEdge(self.clock)
 
-            if self.enable is None or self.enable.value:
-                d_val = self.data.value.integer
-                dv_val = self.dv.value.integer
-                er_val = 0 if self.er is None else self.er.value.integer
+        active_event = RisingEdge(self.dv)
+
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
+        while True:
+            await clock_edge_event
+
+            if self.enable is None or int(self.enable.value):
+                d_val = int(self.data.value)
+                dv_val = int(self.dv.value)
+                er_val = 0 if self.er is None else int(self.er.value)
 
                 if frame is None:
                     if dv_val:
@@ -370,6 +400,12 @@ class MiiSink(Reset):
                     frame.data.append(d_val)
                     frame.error.append(er_val)
 
+                if not dv_val:
+                    await active_event
+
+            elif self.enable is not None and not self.enable.value:
+                await enable_event
+
 
 class MiiPhy:
     def __init__(self, txd, tx_er, tx_en, tx_clk, rxd, rx_er, rx_dv, rx_clk, reset=None,
@@ -398,7 +434,7 @@ class MiiPhy:
         if self._clock_cr is not None:
             self._clock_cr.kill()
 
-        self._clock_cr = cocotb.fork(self._run_clocks(4*1e9/self.speed))
+        self._clock_cr = cocotb.start_soon(self._run_clocks(4*1e9/self.speed))
 
     async def _run_clocks(self, period):
         half_period = get_sim_steps(period / 2.0, 'ns')
@@ -406,8 +442,8 @@ class MiiPhy:
 
         while True:
             await t
-            self.tx_clk <= 1
-            self.rx_clk <= 1
+            self.tx_clk.value = 1
+            self.rx_clk.value = 1
             await t
-            self.tx_clk <= 0
-            self.rx_clk <= 0
+            self.tx_clk.value = 0
+            self.rx_clk.value = 0

cocotbext/eth/ptp.py

@@ -1,6 +1,6 @@
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -23,7 +23,7 @@ THE SOFTWARE.
 """
 
 import logging
-import math
+from decimal import Decimal, Context
 from fractions import Fraction
 
 import cocotb
@@ -38,8 +38,8 @@ class PtpClock(Reset):
 
     def __init__(
             self,
-            ts_96=None,
-            ts_64=None,
+            ts_tod=None,
+            ts_rel=None,
             ts_step=None,
             pps=None,
             clock=None,
@@ -49,42 +49,42 @@ class PtpClock(Reset):
             *args, **kwargs):
 
         self.log = logging.getLogger(f"cocotb.eth.{type(self).__name__}")
-        self.ts_96 = ts_96
-        self.ts_64 = ts_64
+        self.ts_tod = ts_tod
+        self.ts_rel = ts_rel
         self.ts_step = ts_step
         self.pps = pps
         self.clock = clock
         self.reset = reset
 
-        self.period_ns = 0
-        self.period_fns = 0
-        self.drift_ns = 0
-        self.drift_fns = 0
-        self.drift_rate = 0
-        self.set_period_ns(period_ns)
-
         self.log.info("PTP clock")
         self.log.info("cocotbext-eth version %s", __version__)
-        self.log.info("Copyright (c) 2020 Alex Forencich")
+        self.log.info("Copyright (c) 2020-2025 Alex Forencich")
         self.log.info("https://github.com/alexforencich/cocotbext-eth")
 
         super().__init__(*args, **kwargs)
 
-        self.ts_96_s = 0
-        self.ts_96_ns = 0
-        self.ts_96_fns = 0
+        self.ctx = Context(prec=60)
 
-        self.ts_64_ns = 0
-        self.ts_64_fns = 0
+        self.period_ns = 0
+        self.period_fns = 0
+        self.drift_num = 0
+        self.drift_denom = 0
+        self.drift_cnt = 0
+        self.set_period_ns(period_ns)
+
+        self.ts_tod_s = 0
+        self.ts_tod_ns = 0
+        self.ts_tod_fns = 0
+
+        self.ts_rel_ns = 0
+        self.ts_rel_fns = 0
 
         self.ts_updated = False
 
-        self.drift_cnt = 0
-
-        if self.ts_96 is not None:
-            self.ts_96.setimmediatevalue(0)
-        if self.ts_64 is not None:
-            self.ts_64.setimmediatevalue(0)
+        if self.ts_tod is not None:
+            self.ts_tod.setimmediatevalue(0)
+        if self.ts_rel is not None:
+            self.ts_rel.setimmediatevalue(0)
         if self.ts_step is not None:
             self.ts_step.setimmediatevalue(0)
         if self.pps is not None:
@@ -96,90 +96,103 @@ class PtpClock(Reset):
 
     def set_period(self, ns, fns):
         self.period_ns = int(ns)
-        self.period_fns = int(fns) & 0xffff
+        self.period_fns = int(fns) & 0xffffffff
 
-    def set_drift(self, ns, fns, rate):
-        self.drift_ns = int(ns)
-        self.drift_fns = int(fns) & 0xffff
-        self.drift_rate = int(rate)
+    def set_drift(self, num, denom):
+        self.drift_num = int(num)
+        self.drift_denom = int(denom)
 
     def set_period_ns(self, t):
-        drift, period = math.modf(t*2**16)
+        t = Decimal(t)
+        period, drift = self.ctx.divmod(Decimal(t) * Decimal(2**32), Decimal(1))
         period = int(period)
-        frac = Fraction(drift).limit_denominator(2**16)
-        drift = frac.numerator
-        rate = frac.denominator
-        self.period_ns = period >> 16
-        self.period_fns = period & 0xffff
-        self.drift_ns = drift >> 16
-        self.drift_fns = drift & 0xffff
-        self.drift_rate = rate
+        frac = Fraction(drift).limit_denominator(2**16-1)
+        self.set_period(period >> 32, period & 0xffffffff)
+        self.set_drift(frac.numerator, frac.denominator)
+
+        self.log.info("Set period: %s ns", t)
+        self.log.info("Period: 0x%x ns 0x%08x fns", self.period_ns, self.period_fns)
+        self.log.info("Drift: 0x%04x / 0x%04x fns", self.drift_num, self.drift_denom)
 
     def get_period_ns(self):
-        p = ((self.period_ns << 16) | self.period_fns) / 2**16
-        if self.drift_rate:
-            return p + ((self.drift_ns << 16) | self.drift_fns) / self.drift_rate / 2**16
-        return p
+        p = Decimal((self.period_ns << 32) | self.period_fns)
+        if self.drift_denom:
+            p += Decimal(self.drift_num) / Decimal(self.drift_denom)
+        return p / Decimal(2**32)
 
-    def set_ts_96(self, ts_s, ts_ns=None, ts_fns=None):
-        ts_s = int(ts_s)
-        if ts_fns is not None:
-            # got separate fields
-            self.ts_96_s = ts_s
-            self.ts_96_ns = int(ts_ns)
-            self.ts_96_fns = int(ts_fns)
-        else:
-            # got timestamp as integer
-            self.ts_96_s = ts_s >> 48
-            self.ts_96_ns = (ts_s >> 16) & 0x3fffffff
-            self.ts_96_fns = ts_s & 0xffff
+    def set_ts_tod(self, ts_s, ts_ns, ts_fns):
+        self.ts_tod_s = int(ts_s)
+        self.ts_tod_ns = int(ts_ns)
+        self.ts_tod_fns = int(ts_fns)
         self.ts_updated = True
 
-    def set_ts_96_ns(self, t):
-        self.set_ts_96_s(t*1e-9)
+    def set_ts_tod_96(self, ts):
+        ts = int(ts)
+        self.set_ts_tod(ts >> 48, (ts >> 32) & 0x3fffffff, (ts & 0xffff) << 16)
 
-    def set_ts_96_s(self, t):
-        ts_ns, ts_s = math.modf(t)
-        ts_ns *= 1e9
-        ts_fns, ts_ns = math.modf(ts_ns)
-        ts_fns *= 2**16
-        self.set_ts_96(ts_s, ts_ns, ts_fns)
+    def set_ts_tod_ns(self, t):
+        ts_s, ts_ns = self.ctx.divmod(Decimal(t), Decimal(1000000000))
+        ts_ns, ts_fns = self.ctx.divmod(ts_ns, Decimal(1))
+        ts_ns = ts_ns.to_integral_value()
+        ts_fns = (ts_fns * Decimal(2**32)).to_integral_value()
+        self.set_ts_tod(ts_s, ts_ns, ts_fns)
 
-    def get_ts_96(self):
-        return (self.ts_96_s << 48) | (self.ts_96_ns << 16) | self.ts_96_fns
+    def set_ts_tod_s(self, t):
+        self.set_ts_tod_ns(Decimal(t).scaleb(9, self.ctx))
 
-    def get_ts_96_ns(self):
-        return self.ts_96_s*1e9+self.ts_96_ns+self.ts_96_fns/2**16
+    def set_ts_tod_sim_time(self):
+        self.set_ts_tod_ns(Decimal(get_sim_time('fs')).scaleb(-6))
 
-    def get_ts_96_s(self):
-        return self.get_ts_96_ns()*1e-9
+    def get_ts_tod(self):
+        return (self.ts_tod_s, self.ts_tod_ns, self.ts_tod_fns)
 
-    def set_ts_64(self, ts_ns, ts_fns=None):
-        ts_ns = int(ts_ns)
-        if ts_fns is not None:
-            # got separate fields
-            self.ts_64_ns = ts_ns
-            self.ts_64_fns = int(ts_fns)
-        else:
-            # got timestamp as integer
-            self.ts_64_ns = ts_ns >> 16
-            self.ts_64_fns = ts_ns & 0xffff
+    def get_ts_tod_96(self):
+        ts_s, ts_ns, ts_fns = self.get_ts_tod()
+        return (ts_s << 48) | (ts_ns << 16) | (ts_fns >> 16)
+
+    def get_ts_tod_ns(self):
+        ts_s, ts_ns, ts_fns = self.get_ts_tod()
+        ns = Decimal(ts_fns) / Decimal(2**32)
+        ns = self.ctx.add(ns, Decimal(ts_ns))
+        return self.ctx.add(ns, Decimal(ts_s).scaleb(9))
+
+    def get_ts_tod_s(self):
+        return self.get_ts_tod_ns().scaleb(-9, self.ctx)
+
+    def set_ts_rel(self, ts_ns, ts_fns):
+        self.ts_rel_ns = int(ts_ns)
+        self.ts_rel_fns = int(ts_fns)
         self.ts_updated = True
 
-    def set_ts_64_ns(self, t):
-        self.set_ts_64(t*2**16)
+    def set_ts_rel_64(self, ts):
+        ts = int(ts)
+        self.set_ts_rel(ts >> 16, (ts & 0xffff) << 16)
 
-    def set_ts_64_s(self, t):
-        self.set_ts_64_ns(t*1e9)
+    def set_ts_rel_ns(self, t):
+        ts_ns, ts_fns = self.ctx.divmod(Decimal(t), Decimal(1))
+        ts_ns = ts_ns.to_integral_value()
+        ts_fns = (ts_fns * Decimal(2**32)).to_integral_value()
+        self.set_ts_rel(ts_ns, ts_fns)
 
-    def get_ts_64(self):
-        return (self.ts_64_ns << 16) | self.ts_64_fns
+    def set_ts_rel_s(self, t):
+        self.set_ts_rel_ns(Decimal(t).scaleb(9, self.ctx))
 
-    def get_ts_64_ns(self):
-        return self.get_ts_64()/2**16
+    def set_ts_rel_sim_time(self):
+        self.set_ts_rel_ns(Decimal(get_sim_time('fs')).scaleb(-6))
 
-    def get_ts_64_s(self):
-        return self.get_ts_64()*1e-9
+    def get_ts_rel(self):
+        return (self.ts_rel_ns, self.ts_rel_fns)
+
+    def get_ts_rel_64(self):
+        ts_ns, ts_fns = self.get_ts_rel()
+        return (ts_ns << 16) | (ts_fns >> 16)
+
+    def get_ts_rel_ns(self):
+        ts_ns, ts_fns = self.get_ts_rel()
+        return self.ctx.add(Decimal(ts_fns) / Decimal(2**32), Decimal(ts_ns))
+
+    def get_ts_rel_s(self):
+        return self.get_ts_rel_ns().scaleb(-9, self.ctx)
 
     def _handle_reset(self, state):
         if state:
@@ -188,145 +201,169 @@ class PtpClock(Reset):
                 self._run_cr.kill()
                 self._run_cr = None
 
-            self.ts_96_s = 0
-            self.ts_96_ns = 0
-            self.ts_96_fns = 0
-            self.ts_64_ns = 0
-            self.ts_64_fns = 0
+            self.ts_tod_s = 0
+            self.ts_tod_ns = 0
+            self.ts_tod_fns = 0
+            self.ts_rel_ns = 0
+            self.ts_rel_fns = 0
             self.drift_cnt = 0
-            if self.ts_96 is not None:
-                self.ts_96 <= 0
-            if self.ts_64 is not None:
-                self.ts_64 <= 0
+            if self.ts_tod is not None:
+                self.ts_tod.value = 0
+            if self.ts_rel is not None:
+                self.ts_rel.value = 0
             if self.ts_step is not None:
-                self.ts_step <= 0
+                self.ts_step.value = 0
             if self.pps is not None:
-                self.pps <= 0
+                self.pps.value = 0
         else:
             self.log.info("Reset de-asserted")
             if self._run_cr is None:
-                self._run_cr = cocotb.fork(self._run())
+                self._run_cr = cocotb.start_soon(self._run())
 
     async def _run(self):
+        clock_edge_event = RisingEdge(self.clock)
+
         while True:
-            await RisingEdge(self.clock)
+            await clock_edge_event
 
             if self.ts_step is not None:
-                self.ts_step <= self.ts_updated
+                self.ts_step.value = self.ts_updated
                 self.ts_updated = False
 
             if self.pps is not None:
-                self.pps <= 0
+                self.pps.value = 0
 
-            # increment 96 bit timestamp
-            if self.ts_96 is not None or self.pps is not None:
-                t = ((self.ts_96_ns << 16) + self.ts_96_fns) + ((self.period_ns << 16) + self.period_fns)
+            # increment tod bit timestamp
+            self.ts_tod_fns += (self.period_ns << 32) + self.period_fns
 
-                if self.drift_rate and self.drift_cnt == 0:
-                    t += (self.drift_ns << 16) + self.drift_fns
+            if self.drift_denom and self.drift_cnt == 0:
+                self.ts_tod_fns += self.drift_num
 
-                if t > (1000000000 << 16):
-                    self.ts_96_s += 1
-                    t -= (1000000000 << 16)
+            ns_inc = self.ts_tod_fns >> 32
+            self.ts_tod_fns &= 0xffffffff
+
+            self.ts_tod_ns += ns_inc
+
+            if self.ts_tod_ns >= 1000000000:
+                self.ts_tod_s += 1
+                self.ts_tod_ns -= 1000000000
                 if self.pps is not None:
-                        self.pps <= 1
+                    self.pps.value = 1
 
-                self.ts_96_fns = t & 0xffff
-                self.ts_96_ns = t >> 16
+            if self.ts_tod is not None:
+                self.ts_tod.value = (self.ts_tod_s << 48) | (self.ts_tod_ns << 16) | (self.ts_tod_fns >> 16)
 
-                if self.ts_96 is not None:
-                    self.ts_96 <= (self.ts_96_s << 48) | (self.ts_96_ns << 16) | (self.ts_96_fns)
+            # increment rel bit timestamp
+            self.ts_rel_fns += (self.period_ns << 32) + self.period_fns
 
-            # increment 64 bit timestamp
-            if self.ts_64 is not None:
-                t = ((self.ts_64_ns << 16) + self.ts_64_fns) + ((self.period_ns << 16) + self.period_fns)
+            if self.drift_denom and self.drift_cnt == 0:
+                self.ts_rel_fns += self.drift_num
 
-                if self.drift_rate and self.drift_cnt == 0:
-                    t += ((self.drift_ns << 16) + self.drift_fns)
+            ns_inc = self.ts_rel_fns >> 32
+            self.ts_rel_fns &= 0xffffffff
 
-                self.ts_64_fns = t & 0xffff
-                self.ts_64_ns = t >> 16
+            self.ts_rel_ns = (self.ts_rel_ns + ns_inc) & 0xffffffffffff
 
-                self.ts_64 <= (self.ts_64_ns << 16) | self.ts_64_fns
+            if self.ts_rel is not None:
+                self.ts_rel.value = (self.ts_rel_ns << 16) | (self.ts_rel_fns >> 16)
 
-            if self.drift_rate:
+            if self.drift_denom:
                 if self.drift_cnt > 0:
                     self.drift_cnt -= 1
                 else:
-                    self.drift_cnt = self.drift_rate-1
+                    self.drift_cnt = self.drift_denom-1
 
 
 class PtpClockSimTime:
 
-    def __init__(self, ts_96=None, ts_64=None, pps=None, clock=None, *args, **kwargs):
+    def __init__(self, ts_tod=None, ts_rel=None, pps=None, clock=None, *args, **kwargs):
         self.log = logging.getLogger(f"cocotb.eth.{type(self).__name__}")
-        self.ts_96 = ts_96
-        self.ts_64 = ts_64
+        self.ts_tod = ts_tod
+        self.ts_rel = ts_rel
         self.pps = pps
         self.clock = clock
 
         self.log.info("PTP clock (sim time)")
         self.log.info("cocotbext-eth version %s", __version__)
-        self.log.info("Copyright (c) 2020 Alex Forencich")
+        self.log.info("Copyright (c) 2020-2025 Alex Forencich")
         self.log.info("https://github.com/alexforencich/cocotbext-eth")
 
         super().__init__(*args, **kwargs)
 
-        self.ts_96_s = 0
-        self.ts_96_ns = 0
-        self.ts_96_fns = 0
+        self.ctx = Context(prec=60)
 
-        self.ts_64_ns = 0
-        self.ts_64_fns = 0
+        self.ts_tod_s = 0
+        self.ts_tod_ns = 0
+        self.ts_tod_fns = 0
 
-        self.last_ts_96_s = 0
+        self.ts_rel_ns = 0
+        self.ts_rel_fns = 0
 
-        if self.ts_96 is not None:
-            self.ts_96.setimmediatevalue(0)
-        if self.ts_64 is not None:
-            self.ts_64.setimmediatevalue(0)
+        self.last_ts_tod_s = 0
+
+        if self.ts_tod is not None:
+            self.ts_tod.setimmediatevalue(0)
+        if self.ts_rel is not None:
+            self.ts_rel.setimmediatevalue(0)
         if self.pps is not None:
-            self.pps <= 0
+            self.pps.value = 0
 
-        self._run_cr = cocotb.fork(self._run())
+        self._run_cr = cocotb.start_soon(self._run())
 
-    def get_ts_96(self):
-        return (self.ts_96_s << 48) | (self.ts_96_ns << 16) | self.ts_96_fns
+    def get_ts_tod(self):
+        return (self.ts_tod_s, self.ts_tod_ns, self.ts_tod_fns)
 
-    def get_ts_96_ns(self):
-        return self.ts_96_s*1e9+self.ts_96_ns+self.ts_96_fns/2**16
+    def get_ts_tod_96(self):
+        ts_s, ts_ns, ts_fns = self.get_ts_tod()
+        return (ts_s << 48) | (ts_ns << 16) | (ts_fns >> 16)
 
-    def get_ts_96_s(self):
-        return self.get_ts_96_ns()*1e-9
+    def get_ts_tod_ns(self):
+        ts_s, ts_ns, ts_fns = self.get_ts_tod()
+        ns = Decimal(ts_fns) / Decimal(2**32)
+        ns = self.ctx.add(ns, Decimal(ts_ns))
+        return self.ctx.add(ns, Decimal(ts_s).scaleb(9))
 
-    def get_ts_64(self):
-        return (self.ts_64_ns << 16) | self.ts_64_fns
+    def get_ts_tod_s(self):
+        return self.get_ts_tod_ns().scaleb(-9, self.ctx)
 
-    def get_ts_64_ns(self):
-        return self.get_ts_64()/2**16
+    def get_ts_rel(self):
+        return (self.ts_rel_ns, self.ts_rel_fns)
 
-    def get_ts_64_s(self):
-        return self.get_ts_64()*1e-9
+    def get_ts_rel_64(self):
+        ts_ns, ts_fns = self.get_ts_rel()
+        return (ts_ns << 16) | (ts_fns >> 16)
+
+    def get_ts_rel_ns(self):
+        ts_ns, ts_fns = self.get_ts_rel()
+        return self.ctx.add(Decimal(ts_fns) / Decimal(2**32), Decimal(ts_ns))
+
+    def get_ts_rel_s(self):
+        return self.get_ts_rel_ns().scaleb(-9, self.ctx)
 
     async def _run(self):
+        clock_edge_event = RisingEdge(self.clock)
+
         while True:
-            await RisingEdge(self.clock)
+            await clock_edge_event
 
-            self.ts_64_fns, self.ts_64_ns = math.modf(get_sim_time('ns'))
+            ts_ns, ts_fns = self.ctx.divmod(Decimal(get_sim_time('fs')).scaleb(-6), Decimal(1))
 
-            self.ts_64_ns = int(self.ts_64_ns)
-            self.ts_64_fns = int(self.ts_64_fns*0x10000)
+            self.ts_rel_ns = int(ts_ns.to_integral_value()) & 0xffffffffffff
+            self.ts_rel_fns = int((ts_fns * Decimal(2**16)).to_integral_value())
 
-            self.ts_96_s, self.ts_96_ns = divmod(self.ts_64_ns, 1000000000)
-            self.ts_96_fns = self.ts_64_fns
+            ts_s, ts_ns = self.ctx.divmod(ts_ns, Decimal(1000000000))
 
-            if self.ts_96 is not None:
-                self.ts_96 <= (self.ts_96_s << 48) | (self.ts_96_ns << 16) | self.ts_96_fns
+            self.ts_tod_s = int(ts_s.scaleb(-9).to_integral_value())
+            self.ts_tod_ns = int(ts_ns.to_integral_value())
+            self.ts_tod_fns = self.ts_rel_fns
 
-            if self.ts_64 is not None:
-                self.ts_64 <= (self.ts_64_ns << 16) | self.ts_64_fns
+            if self.ts_tod is not None:
+                self.ts_tod.value = (self.ts_tod_s << 48) | (self.ts_tod_ns << 16) | self.ts_tod_fns
+
+            if self.ts_rel is not None:
+                self.ts_rel.value = (self.ts_rel_ns << 16) | self.ts_rel_fns
 
             if self.pps is not None:
-                self.pps <= int(self.last_ts_96_s != self.ts_96_s)
+                self.pps.value = int(self.last_ts_tod_s != self.ts_tod_s)
 
-            self.last_ts_96_s = self.ts_96_s
+            self.last_ts_tod_s = self.ts_tod_s

cocotbext/eth/reset.py

@@ -1,6 +1,6 @@
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -23,7 +23,7 @@ THE SOFTWARE.
 """
 
 import cocotb
-from cocotb.triggers import RisingEdge, FallingEdge
+from cocotb.triggers import Edge
 
 
 class Reset:
@@ -33,7 +33,7 @@ class Reset:
         self._reset_state = True
 
         if reset_signal is not None:
-            cocotb.fork(self._run_reset(reset_signal, bool(active_level)))
+            cocotb.start_soon(self._run_reset(reset_signal, bool(active_level)))
 
         self._update_reset()
 
@@ -56,11 +56,14 @@ class Reset:
 
     async def _run_reset(self, reset_signal, active_level):
         while True:
-            if bool(reset_signal.value):
-                await FallingEdge(reset_signal)
-                self._ext_reset = not active_level
-                self._update_reset()
-            else:
-                await RisingEdge(reset_signal)
+            await reset_signal.value_change
+            try:
+                level = bool(int(reset_signal.value))
+            except ValueError:
+                continue
+            if level:
                 self._ext_reset = active_level
                 self._update_reset()
+            else:
+                self._ext_reset = not active_level
+                self._update_reset()

cocotbext/eth/rgmii.py

@@ -1,6 +1,6 @@
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -50,7 +50,7 @@ class RgmiiSource(Reset):
 
         self.log.info("RGMII source")
         self.log.info("cocotbext-eth version %s", __version__)
-        self.log.info("Copyright (c) 2020 Alex Forencich")
+        self.log.info("Copyright (c) 2020-2025 Alex Forencich")
         self.log.info("https://github.com/alexforencich/cocotbext-eth")
 
         super().__init__(*args, **kwargs)
@@ -61,6 +61,7 @@ class RgmiiSource(Reset):
         self.current_frame = None
         self.idle_event = Event()
         self.idle_event.set()
+        self.active_event = Event()
 
         self.ifg = 12
         self.mii_mode = False
@@ -90,6 +91,7 @@ class RgmiiSource(Reset):
         frame = GmiiFrame(frame)
         await self.queue.put(frame)
         self.idle_event.clear()
+        self.active_event.set()
         self.queue_occupancy_bytes += len(frame)
         self.queue_occupancy_frames += 1
 
@@ -99,6 +101,7 @@ class RgmiiSource(Reset):
         frame = GmiiFrame(frame)
         self.queue.put_nowait(frame)
         self.idle_event.clear()
+        self.active_event.set()
         self.queue_occupancy_bytes += len(frame)
         self.queue_occupancy_frames += 1
 
@@ -126,6 +129,7 @@ class RgmiiSource(Reset):
             frame.handle_tx_complete()
         self.dequeue_event.set()
         self.idle_event.set()
+        self.active_event.clear()
         self.queue_occupancy_bytes = 0
         self.queue_occupancy_frames = 0
 
@@ -136,12 +140,12 @@ class RgmiiSource(Reset):
         if state:
             self.log.info("Reset asserted")
             if self._run_cr is not None:
-                self._run_cr.kill()
+                self._run_cr.cancel()
                 self._run_cr = None
 
             self.active = False
-            self.data <= 0
-            self.ctrl <= 0
+            self.data.value = 0
+            self.ctrl.value = 0
 
             if self.current_frame:
                 self.log.warning("Flushed transmit frame during reset: %s", self.current_frame)
@@ -150,30 +154,51 @@ class RgmiiSource(Reset):
 
             if self.queue.empty():
                 self.idle_event.set()
+                self.active_event.clear()
         else:
             self.log.info("Reset de-asserted")
             if self._run_cr is None:
-                self._run_cr = cocotb.fork(self._run())
+                self._run_cr = cocotb.start_soon(self._run())
 
     async def _run(self):
         frame = None
+        frame_offset = 0
+        frame_data = None
+        frame_error = None
         ifg_cnt = 0
+        in_ifg = False
         self.active = False
         d = 0
         er = 0
         en = 0
 
+        clock_rising_edge_event = RisingEdge(self.clock)
+        clock_falling_edge_event = FallingEdge(self.clock)
+
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
         while True:
-            await RisingEdge(self.clock)
+            await clock_falling_edge_event
+
+            # send low nibble after falling edge, leading in to rising edge
+            self.data.value = d & 0x0F
+            self.ctrl.value = en
+
+            await clock_rising_edge_event
 
             # send high nibble after rising edge, leading in to falling edge
-            self.data <= d >> 4
-            self.ctrl <= en ^ er
+            self.data.value = d >> 4
+            self.ctrl.value = en ^ er
+
+            if self.enable is None or int(self.enable.value):
+                in_ifg = False
 
-            if self.enable is None or self.enable.value:
                 if ifg_cnt > 0:
                     # in IFG
                     ifg_cnt -= 1
+                    in_ifg = True
 
                 elif frame is None and not self.queue.empty():
                     # send frame
@@ -189,31 +214,36 @@ class RgmiiSource(Reset):
                     frame.normalize()
 
                     if self.mii_select is not None:
-                        self.mii_mode = bool(self.mii_select.value.integer)
+                        self.mii_mode = bool(int(self.mii_select.value))
 
                     if self.mii_mode:
-                        mii_data = []
-                        mii_error = []
+                        # convert to MII
+                        frame_data = []
+                        frame_error = []
                         for b, e in zip(frame.data, frame.error):
-                            mii_data.append((b & 0x0F)*0x11)
-                            mii_data.append((b >> 4)*0x11)
-                            mii_error.append(e)
-                            mii_error.append(e)
-                        frame.data = mii_data
-                        frame.error = mii_error
+                            frame_data.append((b & 0x0F)*0x11)
+                            frame_data.append((b >> 4)*0x11)
+                            frame_error.append(e)
+                            frame_error.append(e)
+                    else:
+                        frame_data = frame.data
+                        frame_error = frame.error
 
                     self.active = True
+                    frame_offset = 0
 
                 if frame is not None:
-                    d = frame.data.pop(0)
-                    er = frame.error.pop(0)
+                    d = frame_data[frame_offset]
+                    er = frame_error[frame_offset]
                     en = 1
+                    frame_offset += 1
 
                     if frame.sim_time_sfd is None and d in (EthPre.SFD, 0xD, 0xDD):
                         frame.sim_time_sfd = get_sim_time()
 
-                    if not frame.data:
+                    if frame_offset >= len(frame_data):
                         ifg_cnt = max(self.ifg, 1)
+                        in_ifg = True
                         frame.sim_time_end = get_sim_time()
                         frame.handle_tx_complete()
                         frame = None
@@ -223,13 +253,14 @@ class RgmiiSource(Reset):
                     er = 0
                     en = 0
                     self.active = False
+
+                    if not in_ifg and self.queue.empty():
                         self.idle_event.set()
+                        self.active_event.clear()
+                        await self.active_event.wait()
 
-            await FallingEdge(self.clock)
-
-            # send low nibble after falling edge, leading in to rising edge
-            self.data <= d & 0x0F
-            self.ctrl <= en
+            elif self.enable is not None and not self.enable.value:
+                await enable_event
 
 
 class RgmiiSink(Reset):
@@ -247,7 +278,7 @@ class RgmiiSink(Reset):
 
         self.log.info("RGMII sink")
         self.log.info("cocotbext-eth version %s", __version__)
-        self.log.info("Copyright (c) 2020 Alex Forencich")
+        self.log.info("Copyright (c) 2020-2025 Alex Forencich")
         self.log.info("https://github.com/alexforencich/cocotbext-eth")
 
         super().__init__(*args, **kwargs)
@@ -316,14 +347,14 @@ class RgmiiSink(Reset):
         if state:
             self.log.info("Reset asserted")
             if self._run_cr is not None:
-                self._run_cr.kill()
+                self._run_cr.cancel()
                 self._run_cr = None
 
             self.active = False
         else:
             self.log.info("Reset de-asserted")
             if self._run_cr is None:
-                self._run_cr = cocotb.fork(self._run())
+                self._run_cr = cocotb.start_soon(self._run())
 
     async def _run(self):
         frame = None
@@ -332,20 +363,29 @@ class RgmiiSink(Reset):
         dv_val = 0
         er_val = 0
 
+        clock_rising_edge_event = RisingEdge(self.clock)
+        clock_falling_edge_event = FallingEdge(self.clock)
+
+        active_event = RisingEdge(self.ctrl)
+
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
         while True:
-            await RisingEdge(self.clock)
+            await clock_rising_edge_event
+
+            if self.enable is None or int(self.enable.value):
 
                 # capture low nibble on rising edge
-            d_val = self.data.value.integer
-            dv_val = self.ctrl.value.integer
+                d_val = int(self.data.value)
+                dv_val = int(self.ctrl.value)
 
-            await FallingEdge(self.clock)
+                await clock_falling_edge_event
 
                 # capture high nibble on falling edge
-            d_val |= self.data.value.integer << 4
-            er_val = dv_val ^ self.ctrl.value.integer
-
-            if self.enable is None or self.enable.value:
+                d_val |= int(self.data.value) << 4
+                er_val = dv_val ^ int(self.ctrl.value)
 
                 if frame is None:
                     if dv_val:
@@ -357,7 +397,7 @@ class RgmiiSink(Reset):
                         # end of frame
 
                         if self.mii_select is not None:
-                            self.mii_mode = bool(self.mii_select.value.integer)
+                            self.mii_mode = bool(int(self.mii_select.value))
 
                         if self.mii_mode:
                             odd = True
@@ -399,6 +439,12 @@ class RgmiiSink(Reset):
                     frame.data.append(d_val)
                     frame.error.append(er_val)
 
+                if not dv_val:
+                    await active_event
+
+            elif self.enable is not None and not self.enable.value:
+                await enable_event
+
 
 class RgmiiPhy:
     def __init__(self, txd, tx_ctl, tx_clk, rxd, rx_ctl, rx_clk, reset=None,
@@ -427,11 +473,11 @@ class RgmiiPhy:
             self._clock_cr.kill()
 
         if self.speed == 1000e6:
-            self._clock_cr = cocotb.fork(self._run_clock(8*1e9/self.speed))
+            self._clock_cr = cocotb.start_soon(self._run_clock(8*1e9/self.speed))
             self.tx.mii_mode = False
             self.rx.mii_mode = False
         else:
-            self._clock_cr = cocotb.fork(self._run_clock(4*1e9/self.speed))
+            self._clock_cr = cocotb.start_soon(self._run_clock(4*1e9/self.speed))
             self.tx.mii_mode = True
             self.rx.mii_mode = True
 
@@ -441,6 +487,6 @@ class RgmiiPhy:
 
         while True:
             await t
-            self.rx_clk <= 1
+            self.rx_clk.value = 1
             await t
-            self.rx_clk <= 0
+            self.rx_clk.value = 0

cocotbext/eth/version.py

@@ -1 +1 @@
-__version__ = "0.1.12"
+__version__ = "0.1.24"

cocotbext/eth/xgmii.py

@@ -1,6 +1,6 @@
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -28,7 +28,7 @@ import zlib
 
 import cocotb
 from cocotb.queue import Queue, QueueFull
-from cocotb.triggers import RisingEdge, Timer, First, Event
+from cocotb.triggers import Edge, RisingEdge, Timer, First, Event
 from cocotb.utils import get_sim_time
 
 from .version import __version__
@@ -147,7 +147,7 @@ class XgmiiSource(Reset):
 
         self.log.info("XGMII source")
         self.log.info("cocotbext-eth version %s", __version__)
-        self.log.info("Copyright (c) 2020 Alex Forencich")
+        self.log.info("Copyright (c) 2020-2025 Alex Forencich")
         self.log.info("https://github.com/alexforencich/cocotbext-eth")
 
         super().__init__(*args, **kwargs)
@@ -158,6 +158,7 @@ class XgmiiSource(Reset):
         self.current_frame = None
         self.idle_event = Event()
         self.idle_event.set()
+        self.active_event = Event()
 
         self.enable_dic = True
         self.ifg = 12
@@ -170,14 +171,19 @@ class XgmiiSource(Reset):
         self.queue_occupancy_limit_frames = -1
 
         self.width = len(self.data)
-        self.byte_width = len(self.ctrl)
+        self.byte_size = 8
+        self.byte_lanes = len(self.ctrl)
 
-        assert self.width == self.byte_width * 8
+        assert self.width == self.byte_lanes * self.byte_size
+
+        self.log.info("XGMII source model configuration")
+        self.log.info("  Byte size: %d bits", self.byte_size)
+        self.log.info("  Data width: %d bits (%d bytes)", self.width, self.byte_lanes)
 
         self.idle_d = 0
         self.idle_c = 0
 
-        for k in range(self.byte_width):
+        for k in range(self.byte_lanes):
             self.idle_d |= XgmiiCtrl.IDLE << k*8
             self.idle_c |= 1 << k
 
@@ -195,6 +201,7 @@ class XgmiiSource(Reset):
         frame = XgmiiFrame(frame)
         await self.queue.put(frame)
         self.idle_event.clear()
+        self.active_event.set()
         self.queue_occupancy_bytes += len(frame)
         self.queue_occupancy_frames += 1
 
@@ -204,6 +211,7 @@ class XgmiiSource(Reset):
         frame = XgmiiFrame(frame)
         self.queue.put_nowait(frame)
         self.idle_event.clear()
+        self.active_event.set()
         self.queue_occupancy_bytes += len(frame)
         self.queue_occupancy_frames += 1
 
@@ -231,6 +239,7 @@ class XgmiiSource(Reset):
             frame.handle_tx_complete()
         self.dequeue_event.set()
         self.idle_event.set()
+        self.active_event.clear()
         self.queue_occupancy_bytes = 0
         self.queue_occupancy_frames = 0
 
@@ -245,8 +254,8 @@ class XgmiiSource(Reset):
                 self._run_cr = None
 
             self.active = False
-            self.data <= 0
-            self.ctrl <= 0
+            self.data.value = 0
+            self.ctrl.value = 0
 
             if self.current_frame:
                 self.log.warning("Flushed transmit frame during reset: %s", self.current_frame)
@@ -255,24 +264,32 @@ class XgmiiSource(Reset):
 
             if self.queue.empty():
                 self.idle_event.set()
+                self.active_event.clear()
         else:
             self.log.info("Reset de-asserted")
             if self._run_cr is None:
-                self._run_cr = cocotb.fork(self._run())
+                self._run_cr = cocotb.start_soon(self._run())
 
     async def _run(self):
         frame = None
+        frame_offset = 0
         ifg_cnt = 0
         deficit_idle_cnt = 0
         self.active = False
 
-        while True:
-            await RisingEdge(self.clock)
+        clock_edge_event = RisingEdge(self.clock)
 
-            if self.enable is None or self.enable.value:
-                if ifg_cnt + deficit_idle_cnt > self.byte_width-1 or (not self.enable_dic and ifg_cnt > 4):
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
+        while True:
+            await clock_edge_event
+
+            if self.enable is None or int(self.enable.value):
+                if ifg_cnt + deficit_idle_cnt > self.byte_lanes-1 or (not self.enable_dic and ifg_cnt > 4):
                     # in IFG
-                    ifg_cnt = ifg_cnt - self.byte_width
+                    ifg_cnt = ifg_cnt - self.byte_lanes
                     if ifg_cnt < 0:
                         if self.enable_dic:
                             deficit_idle_cnt = max(deficit_idle_cnt+ifg_cnt, 0)
@@ -306,7 +323,7 @@ class XgmiiSource(Reset):
                         else:
                             min_ifg = 0
 
-                        if self.byte_width > 4 and (ifg_cnt > min_ifg or self.force_offset_start):
+                        if self.byte_lanes > 4 and (ifg_cnt > min_ifg or self.force_offset_start):
                             ifg_cnt = ifg_cnt-4
                             frame.start_lane = 4
                             frame.data = bytearray([XgmiiCtrl.IDLE]*4)+frame.data
@@ -316,6 +333,7 @@ class XgmiiSource(Reset):
                             deficit_idle_cnt = max(deficit_idle_cnt+ifg_cnt, 0)
                         ifg_cnt = 0
                         self.active = True
+                        frame_offset = 0
                     else:
                         # clear counters
                         deficit_idle_cnt = 0
@@ -325,16 +343,17 @@ class XgmiiSource(Reset):
                     d_val = 0
                     c_val = 0
 
-                    for k in range(self.byte_width):
+                    for k in range(self.byte_lanes):
                         if frame is not None:
-                            d = frame.data.pop(0)
+                            d = frame.data[frame_offset]
                             if frame.sim_time_sfd is None and d == EthPre.SFD:
                                 frame.sim_time_sfd = get_sim_time()
                             d_val |= d << k*8
-                            c_val |= frame.ctrl.pop(0) << k
+                            c_val |= frame.ctrl[frame_offset] << k
+                            frame_offset += 1
 
-                            if not frame.data:
-                                ifg_cnt = max(self.ifg - (self.byte_width-k), 0)
+                            if frame_offset >= len(frame.data):
+                                ifg_cnt = max(self.ifg - (self.byte_lanes-k), 0)
                                 frame.sim_time_end = get_sim_time()
                                 frame.handle_tx_complete()
                                 frame = None
@@ -343,13 +362,20 @@ class XgmiiSource(Reset):
                             d_val |= XgmiiCtrl.IDLE << k*8
                             c_val |= 1 << k
 
-                    self.data <= d_val
-                    self.ctrl <= c_val
+                    self.data.value = d_val
+                    self.ctrl.value = c_val
                 else:
-                    self.data <= self.idle_d
-                    self.ctrl <= self.idle_c
+                    self.data.value = self.idle_d
+                    self.ctrl.value = self.idle_c
                     self.active = False
+
+                    if ifg_cnt == 0 and self.queue.empty():
                         self.idle_event.set()
+                        self.active_event.clear()
+                        await self.active_event.wait()
+
+            elif self.enable is not None and not self.enable.value:
+                await enable_event
 
 
 class XgmiiSink(Reset):
@@ -364,7 +390,7 @@ class XgmiiSink(Reset):
 
         self.log.info("XGMII sink")
         self.log.info("cocotbext-eth version %s", __version__)
-        self.log.info("Copyright (c) 2020 Alex Forencich")
+        self.log.info("Copyright (c) 2020-2025 Alex Forencich")
         self.log.info("https://github.com/alexforencich/cocotbext-eth")
 
         super().__init__(*args, **kwargs)
@@ -377,9 +403,14 @@ class XgmiiSink(Reset):
         self.queue_occupancy_frames = 0
 
         self.width = len(self.data)
-        self.byte_width = len(self.ctrl)
+        self.byte_size = 8
+        self.byte_lanes = len(self.ctrl)
 
-        assert self.width == self.byte_width * 8
+        assert self.width == self.byte_lanes * self.byte_size
+
+        self.log.info("XGMII sink model configuration")
+        self.log.info("  Byte size: %d bits", self.byte_size)
+        self.log.info("  Data width: %d bits (%d bytes)", self.width, self.byte_lanes)
 
         self._run_cr = None
 
@@ -437,19 +468,32 @@ class XgmiiSink(Reset):
         else:
             self.log.info("Reset de-asserted")
             if self._run_cr is None:
-                self._run_cr = cocotb.fork(self._run())
+                self._run_cr = cocotb.start_soon(self._run())
 
     async def _run(self):
         frame = None
         self.active = False
 
-        while True:
-            await RisingEdge(self.clock)
+        clock_edge_event = RisingEdge(self.clock)
 
-            if self.enable is None or self.enable.value:
-                for offset in range(self.byte_width):
-                    d_val = (self.data.value.integer >> (offset*8)) & 0xff
-                    c_val = (self.ctrl.value.integer >> offset) & 1
+        active_event = First(Edge(self.data), Edge(self.ctrl))
+
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
+        idle_d = sum([XgmiiCtrl.IDLE << n*8 for n in range(self.byte_lanes)])
+        idle_c = 2**self.byte_lanes-1
+
+        while True:
+            await clock_edge_event
+
+            if self.enable is None or int(self.enable.value):
+                data_val = int(self.data.value)
+                ctrl_val = int(self.ctrl.value)
+                for offset in range(self.byte_lanes):
+                    d_val = (data_val >> (offset*8)) & 0xff
+                    c_val = (ctrl_val >> offset) & 1
 
                     if frame is None:
                         if c_val and d_val == XgmiiCtrl.START:
@@ -482,3 +526,9 @@ class XgmiiSink(Reset):
 
                             frame.data.append(d_val)
                             frame.ctrl.append(c_val)
+
+                if data_val == idle_d and ctrl_val == idle_c:
+                    await active_event
+
+            elif self.enable is not None and not self.enable.value:
+                await enable_event

setup.cfg

@@ -13,21 +13,22 @@ project_urls =
     Source Code = https://github.com/alexforencich/cocotbext-eth
 download_url = https://github.com/alexforencich/cocotbext-eth/tarball/master
 long_description = file: README.md
-long-description-content-type = text/markdown
+long_description_content_type = text/markdown
 platforms = any
 classifiers =
     Development Status :: 3 - Alpha
-    Programming Language :: Python :: 3
+    Framework :: cocotb
     License :: OSI Approved :: MIT License
     Operating System :: OS Independent
+    Programming Language :: Python :: 3
     Topic :: Scientific/Engineering :: Electronic Design Automation (EDA)
 
 [options]
 packages = find_namespace:
 python_requires = >=3.6
 install_requires =
-    cocotb
-    cocotbext-axi
+    cocotb >= 1.6.0
+    cocotbext-axi >= 0.1.16
 
 [options.extras_require]
 test =
@@ -46,31 +47,41 @@ addopts =
 
 # tox configuration
 [tox:tox]
-envlist = py36, py37, py38, py39
+envlist = py38, py39, py310, py311, py312, py313
+skip_missing_interpreters = true
+minversion = 3.18.0
+requires = virtualenv >= 16.1
 
 [gh-actions]
 python =
-    3.6: py36
-    3.7: py37
     3.8: py38
     3.9: py39
+    3.10: py310
+    3.11: py311
+    3.12: py312
+    3.13: py313
 
 [testenv]
 setenv =
     COVERAGE=1
+usedevelop = True
 
 deps =
-    pytest
-    pytest-xdist
-    cocotb-test
-    coverage
-    pytest-cov
+    pytest == 8.3.4
+    pytest-xdist == 3.6.1
+    cocotb == 1.9.2
+    cocotb-bus == 0.2.1
+    cocotb-test == 0.2.6
+    cocotbext-axi == 0.1.26
+    coverage == 7.0.5
+    pytest-cov == 4.0.0
 
 commands =
-    pytest --cov=cocotbext --cov=tests --cov-branch -n auto
+    pytest --cov=cocotbext --cov=tests --cov-branch {posargs:-n auto --verbose}
     bash -c 'find . -type f -name "\.coverage" | xargs coverage combine --append'
+    coverage report
 
-whitelist_externals =
+allowlist_externals =
     bash
 
 # combine if paths are different

tests/eth_mac/Makefile

@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Alex Forencich
+# Copyright (c) 2021-2025 Alex Forencich
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -27,35 +27,31 @@ COCOTB_HDL_TIMEUNIT = 1ns
 COCOTB_HDL_TIMEPRECISION = 1ns
 
 DUT      = test_eth_mac
-TOPLEVEL = $(DUT)
-MODULE   = $(DUT)
+COCOTB_TEST_MODULES = $(DUT)
+COCOTB_TOPLEVEL     = $(DUT)
+MODULE   = $(COCOTB_TEST_MODULES)
+TOPLEVEL = $(COCOTB_TOPLEVEL)
 VERILOG_SOURCES += $(DUT).v
 
+# module parameters
+export PARAM_PTP_TS_WIDTH := 96
+export PARAM_PTP_TAG_WIDTH := 16
+export PARAM_AXIS_DATA_WIDTH := 64
+export PARAM_AXIS_KEEP_WIDTH := $(shell expr $(PARAM_AXIS_DATA_WIDTH) / 8 )
+export PARAM_AXIS_TX_USER_WIDTH := $(shell expr $(PARAM_PTP_TAG_WIDTH) + 1 )
+export PARAM_AXIS_RX_USER_WIDTH := $(shell expr $(PARAM_PTP_TS_WIDTH) + 1 )
+
 ifeq ($(SIM), icarus)
 	PLUSARGS += -fst
 
-	ifeq ($(WAVES), 1)
-		VERILOG_SOURCES += iverilog_dump.v
-		COMPILE_ARGS += -s iverilog_dump
-	endif
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-P $(COCOTB_TOPLEVEL).$(subst PARAM_,,$(v))=$($(v)))
 else ifeq ($(SIM), verilator)
-	COMPILE_ARGS += -Wno-SELRANGE -Wno-WIDTH
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-G$(subst PARAM_,,$(v))=$($(v)))
 
 	ifeq ($(WAVES), 1)
 		COMPILE_ARGS += --trace-fst
+		VERILATOR_TRACE = 1
 	endif
 endif
 
 include $(shell cocotb-config --makefiles)/Makefile.sim
-
-iverilog_dump.v:
-	echo 'module iverilog_dump();' > $@
-	echo 'initial begin' >> $@
-	echo '    $$dumpfile("$(TOPLEVEL).fst");' >> $@
-	echo '    $$dumpvars(0, $(TOPLEVEL));' >> $@
-	echo 'end' >> $@
-	echo 'endmodule' >> $@
-
-clean::
-	@rm -rf iverilog_dump.v
-	@rm -rf dump.fst $(TOPLEVEL).fst

tests/eth_mac/test_eth_mac.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 """
 
-Copyright (c) 2021 Alex Forencich
+Copyright (c) 2021-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -28,6 +28,7 @@ import logging
 import os
 
 import cocotb_test.simulator
+import pytest
 
 import cocotb
 from cocotb.clock import Clock
@@ -45,8 +46,20 @@ class TB:
         self.log = logging.getLogger("cocotb.tb")
         self.log.setLevel(logging.DEBUG)
 
-        cocotb.fork(Clock(dut.tx_clk, 6.4, units="ns").start())
-        cocotb.fork(Clock(dut.rx_clk, 6.4, units="ns").start())
+        if len(dut.tx_axis_tdata) == 8:
+            clk_period = 8
+        elif len(dut.tx_axis_tdata) == 32:
+            clk_period = 3.102
+        elif len(dut.tx_axis_tdata) == 64:
+            if speed == 25e9:
+                clk_period = 2.56
+            else:
+                clk_period = 6.206
+        elif len(dut.tx_axis_tdata) == 512:
+            clk_period = 3.102
+
+        cocotb.start_soon(Clock(dut.tx_clk, clk_period, units="ns").start())
+        cocotb.start_soon(Clock(dut.rx_clk, clk_period, units="ns").start())
 
         self.mac = EthMac(
             tx_clk=dut.tx_clk,
@@ -54,6 +67,7 @@ class TB:
             tx_bus=AxiStreamBus.from_prefix(dut, "tx_axis"),
             tx_ptp_time=dut.tx_ptp_time,
             tx_ptp_ts=dut.tx_ptp_ts,
+            tx_ptp_ts_tag=dut.tx_ptp_ts_tag,
             tx_ptp_ts_valid=dut.tx_ptp_ts_valid,
             rx_clk=dut.rx_clk,
             rx_rst=dut.rx_rst,
@@ -63,12 +77,12 @@ class TB:
         )
 
         self.tx_ptp = PtpClockSimTime(
-            ts_96=dut.tx_ptp_time,
+            ts_tod=dut.tx_ptp_time,
             clock=dut.tx_clk
         )
 
         self.rx_ptp = PtpClockSimTime(
-            ts_96=dut.rx_ptp_time,
+            ts_tod=dut.rx_ptp_time,
             clock=dut.rx_clk
         )
 
@@ -80,12 +94,12 @@ class TB:
         self.dut.rx_rst.setimmediatevalue(0)
         await RisingEdge(self.dut.tx_clk)
         await RisingEdge(self.dut.tx_clk)
-        self.dut.tx_rst <= 1
-        self.dut.rx_rst <= 1
+        self.dut.tx_rst.value = 1
+        self.dut.rx_rst.value = 1
         await RisingEdge(self.dut.tx_clk)
         await RisingEdge(self.dut.tx_clk)
-        self.dut.tx_rst <= 0
-        self.dut.rx_rst <= 0
+        self.dut.tx_rst.value = 0
+        self.dut.rx_rst.value = 0
         await RisingEdge(self.dut.tx_clk)
         await RisingEdge(self.dut.tx_clk)
 
@@ -154,14 +168,23 @@ def incrementing_payload(length):
     return bytearray(itertools.islice(itertools.cycle(range(256)), length))
 
 
-if cocotb.SIM_NAME:
+if getattr(cocotb, 'top', None) is not None:
+
+    if len(cocotb.top.tx_axis_tdata) == 8:
+        speed = [100e6, 1e9]
+    elif len(cocotb.top.tx_axis_tdata) == 32:
+        speed = [10e9]
+    elif len(cocotb.top.tx_axis_tdata) == 64:
+        speed = [10e9, 25e9]
+    elif len(cocotb.top.tx_axis_tdata) == 512:
+        speed = [100e9]
 
     for test in [run_test_tx, run_test_rx]:
 
         factory = TestFactory(test)
         factory.add_option("payload_lengths", [size_list])
         factory.add_option("payload_data", [incrementing_payload])
-        factory.add_option("speed", [10e9, 1e9])
+        factory.add_option("speed", speed)
         factory.generate_tests()
 
 
@@ -170,7 +193,8 @@ if cocotb.SIM_NAME:
 tests_dir = os.path.dirname(__file__)
 
 
-def test_eth_mac(request):
+@pytest.mark.parametrize("data_width", [8, 32, 64, 512])
+def test_eth_mac(request, data_width):
     dut = "test_eth_mac"
     module = os.path.splitext(os.path.basename(__file__))[0]
     toplevel = dut
@@ -181,6 +205,13 @@ def test_eth_mac(request):
 
     parameters = {}
 
+    parameters['PTP_TS_WIDTH'] = 96
+    parameters['PTP_TAG_WIDTH'] = 16
+    parameters['AXIS_DATA_WIDTH'] = data_width
+    parameters['AXIS_KEEP_WIDTH'] = parameters['AXIS_DATA_WIDTH'] // 8
+    parameters['AXIS_TX_USER_WIDTH'] = parameters['PTP_TAG_WIDTH']+1
+    parameters['AXIS_RX_USER_WIDTH'] = parameters['PTP_TS_WIDTH']+1
+
     extra_env = {f'PARAM_{k}': str(v) for k, v in parameters.items()}
 
     sim_build = os.path.join(tests_dir, "sim_build",

tests/eth_mac/test_eth_mac.v

@@ -1,6 +1,6 @@
 /*
 
-Copyright (c) 2021 Alex Forencich
+Copyright (c) 2021-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -29,28 +29,37 @@ THE SOFTWARE.
 /*
  * Ethernet MAC model test
  */
-module test_eth_mac
+module test_eth_mac #
+(
+    parameter PTP_TS_WIDTH = 96,
+    parameter PTP_TAG_WIDTH = 16,
+    parameter AXIS_DATA_WIDTH = 64,
+    parameter AXIS_KEEP_WIDTH = (AXIS_DATA_WIDTH/8),
+    parameter AXIS_TX_USER_WIDTH = PTP_TAG_WIDTH+1,
+    parameter AXIS_RX_USER_WIDTH = PTP_TS_WIDTH+1
+)
 (
     inout  wire                           tx_clk,
     inout  wire                           tx_rst,
-    inout  wire [63:0] tx_axis_tdata,
-    inout  wire [7:0]  tx_axis_tkeep,
+    inout  wire [AXIS_DATA_WIDTH-1:0]     tx_axis_tdata,
+    inout  wire [AXIS_KEEP_WIDTH-1:0]     tx_axis_tkeep,
     inout  wire                           tx_axis_tlast,
-    inout  wire        tx_axis_tuser,
+    inout  wire [AXIS_TX_USER_WIDTH-1:0]  tx_axis_tuser,
     inout  wire                           tx_axis_tvalid,
     inout  wire                           tx_axis_tready,
-    inout  wire [95:0] tx_ptp_time,
-    inout  wire [95:0] tx_ptp_ts,
+    inout  wire [PTP_TS_WIDTH-1:0]        tx_ptp_time,
+    inout  wire [PTP_TS_WIDTH-1:0]        tx_ptp_ts,
+    inout  wire [PTP_TAG_WIDTH-1:0]       tx_ptp_ts_tag,
     inout  wire                           tx_ptp_ts_valid,
 
     inout  wire                           rx_clk,
     inout  wire                           rx_rst,
-    inout  wire [63:0] rx_axis_tdata,
-    inout  wire [7:0]  rx_axis_tkeep,
+    inout  wire [AXIS_DATA_WIDTH-1:0]     rx_axis_tdata,
+    inout  wire [AXIS_KEEP_WIDTH-1:0]     rx_axis_tkeep,
     inout  wire                           rx_axis_tlast,
-    inout  wire [96:0] rx_axis_tuser,
+    inout  wire [AXIS_RX_USER_WIDTH-1:0]  rx_axis_tuser,
     inout  wire                           rx_axis_tvalid,
-    inout  wire [95:0] rx_ptp_time
+    inout  wire [PTP_TS_WIDTH-1:0]        rx_ptp_time
 );
 
 endmodule

tests/gmii/Makefile

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 Alex Forencich
+# Copyright (c) 2020-2025 Alex Forencich
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -27,35 +27,23 @@ COCOTB_HDL_TIMEUNIT = 1ns
 COCOTB_HDL_TIMEPRECISION = 1ns
 
 DUT      = test_gmii
-TOPLEVEL = $(DUT)
-MODULE   = $(DUT)
+COCOTB_TEST_MODULES = $(DUT)
+COCOTB_TOPLEVEL     = $(DUT)
+MODULE   = $(COCOTB_TEST_MODULES)
+TOPLEVEL = $(COCOTB_TOPLEVEL)
 VERILOG_SOURCES += $(DUT).v
 
 ifeq ($(SIM), icarus)
 	PLUSARGS += -fst
 
-	ifeq ($(WAVES), 1)
-		VERILOG_SOURCES += iverilog_dump.v
-		COMPILE_ARGS += -s iverilog_dump
-	endif
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-P $(COCOTB_TOPLEVEL).$(subst PARAM_,,$(v))=$($(v)))
 else ifeq ($(SIM), verilator)
-	COMPILE_ARGS += -Wno-SELRANGE -Wno-WIDTH
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-G$(subst PARAM_,,$(v))=$($(v)))
 
 	ifeq ($(WAVES), 1)
 		COMPILE_ARGS += --trace-fst
+		VERILATOR_TRACE = 1
 	endif
 endif
 
 include $(shell cocotb-config --makefiles)/Makefile.sim
-
-iverilog_dump.v:
-	echo 'module iverilog_dump();' > $@
-	echo 'initial begin' >> $@
-	echo '    $$dumpfile("$(TOPLEVEL).fst");' >> $@
-	echo '    $$dumpvars(0, $(TOPLEVEL));' >> $@
-	echo 'end' >> $@
-	echo 'endmodule' >> $@
-
-clean::
-	@rm -rf iverilog_dump.v
-	@rm -rf dump.fst $(TOPLEVEL).fst

tests/gmii/test_gmii.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -47,7 +47,7 @@ class TB:
         self._enable_generator = None
         self._enable_cr = None
 
-        cocotb.fork(Clock(dut.clk, 2, units="ns").start())
+        cocotb.start_soon(Clock(dut.clk, 2, units="ns").start())
 
         self.source = GmiiSource(dut.gmii_d, dut.gmii_er, dut.gmii_en,
             dut.clk, dut.rst, dut.gmii_clk_en, dut.gmii_mii_sel)
@@ -61,10 +61,10 @@ class TB:
         self.dut.rst.setimmediatevalue(0)
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
-        self.dut.rst <= 1
+        self.dut.rst.value = 1
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
-        self.dut.rst <= 0
+        self.dut.rst.value = 0
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
 
@@ -76,15 +76,17 @@ class TB:
         self._enable_generator = generator
 
         if self._enable_generator is not None:
-            self._enable_cr = cocotb.fork(self._run_enable())
+            self._enable_cr = cocotb.start_soon(self._run_enable())
 
     def clear_enable_generator(self):
         self.set_enable_generator(None)
 
     async def _run_enable(self):
+        clock_edge_event = RisingEdge(self.dut.clk)
+
         for val in self._enable_generator:
-            self.dut.gmii_clk_en <= val
-            await RisingEdge(self.dut.clk)
+            self.dut.gmii_clk_en.value = val
+            await clock_edge_event
 
 
 async def run_test(dut, payload_lengths=None, payload_data=None, ifg=12, enable_gen=None, mii_sel=False):
@@ -92,7 +94,7 @@ async def run_test(dut, payload_lengths=None, payload_data=None, ifg=12, enable_
     tb = TB(dut)
 
     tb.source.ifg = ifg
-    tb.dut.gmii_mii_sel <= mii_sel
+    tb.dut.gmii_mii_sel.value = mii_sel
 
     if enable_gen is not None:
         tb.set_enable_generator(enable_gen())
@@ -130,7 +132,7 @@ def cycle_en():
     return itertools.cycle([0, 0, 0, 1])
 
 
-if cocotb.SIM_NAME:
+if getattr(cocotb, 'top', None) is not None:
 
     factory = TestFactory(run_test)
     factory.add_option("payload_lengths", [size_list])

tests/gmii/test_gmii.v

@@ -1,6 +1,6 @@
 /*
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

tests/gmii_phy/Makefile

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 Alex Forencich
+# Copyright (c) 2020-2025 Alex Forencich
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -27,35 +27,23 @@ COCOTB_HDL_TIMEUNIT = 1ns
 COCOTB_HDL_TIMEPRECISION = 1ns
 
 DUT      = test_gmii_phy
-TOPLEVEL = $(DUT)
-MODULE   = $(DUT)
+COCOTB_TEST_MODULES = $(DUT)
+COCOTB_TOPLEVEL     = $(DUT)
+MODULE   = $(COCOTB_TEST_MODULES)
+TOPLEVEL = $(COCOTB_TOPLEVEL)
 VERILOG_SOURCES += $(DUT).v
 
 ifeq ($(SIM), icarus)
 	PLUSARGS += -fst
 
-	ifeq ($(WAVES), 1)
-		VERILOG_SOURCES += iverilog_dump.v
-		COMPILE_ARGS += -s iverilog_dump
-	endif
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-P $(COCOTB_TOPLEVEL).$(subst PARAM_,,$(v))=$($(v)))
 else ifeq ($(SIM), verilator)
-	COMPILE_ARGS += -Wno-SELRANGE -Wno-WIDTH
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-G$(subst PARAM_,,$(v))=$($(v)))
 
 	ifeq ($(WAVES), 1)
 		COMPILE_ARGS += --trace-fst
+		VERILATOR_TRACE = 1
 	endif
 endif
 
 include $(shell cocotb-config --makefiles)/Makefile.sim
-
-iverilog_dump.v:
-	echo 'module iverilog_dump();' > $@
-	echo 'initial begin' >> $@
-	echo '    $$dumpfile("$(TOPLEVEL).fst");' >> $@
-	echo '    $$dumpvars(0, $(TOPLEVEL));' >> $@
-	echo 'end' >> $@
-	echo 'endmodule' >> $@
-
-clean::
-	@rm -rf iverilog_dump.v
-	@rm -rf dump.fst $(TOPLEVEL).fst

tests/gmii_phy/test_gmii_phy.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -44,7 +44,7 @@ class TB:
         self.log = logging.getLogger("cocotb.tb")
         self.log.setLevel(logging.DEBUG)
 
-        cocotb.fork(Clock(dut.phy_gtx_clk, 8, units="ns").start())
+        cocotb.start_soon(Clock(dut.phy_gtx_clk, 8, units="ns").start())
 
         self.gmii_phy = GmiiPhy(dut.phy_txd, dut.phy_tx_er, dut.phy_tx_en, dut.phy_tx_clk, dut.phy_gtx_clk,
             dut.phy_rxd, dut.phy_rx_er, dut.phy_rx_dv, dut.phy_rx_clk, dut.phy_rst, speed=speed)
@@ -64,10 +64,10 @@ class TB:
         self.dut.phy_rst.setimmediatevalue(0)
         await RisingEdge(self.dut.phy_tx_clk)
         await RisingEdge(self.dut.phy_tx_clk)
-        self.dut.phy_rst <= 1
+        self.dut.phy_rst.value = 1
         await RisingEdge(self.dut.phy_tx_clk)
         await RisingEdge(self.dut.phy_tx_clk)
-        self.dut.phy_rst <= 0
+        self.dut.phy_rst.value = 0
         await RisingEdge(self.dut.phy_tx_clk)
         await RisingEdge(self.dut.phy_tx_clk)
 
@@ -140,7 +140,7 @@ def cycle_en():
     return itertools.cycle([0, 0, 0, 1])
 
 
-if cocotb.SIM_NAME:
+if getattr(cocotb, 'top', None) is not None:
 
     for test in [run_test_tx, run_test_rx]:
 

tests/gmii_phy/test_gmii_phy.v

@@ -1,6 +1,6 @@
 /*
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

tests/mii/Makefile

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 Alex Forencich
+# Copyright (c) 2020-2025 Alex Forencich
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -27,35 +27,23 @@ COCOTB_HDL_TIMEUNIT = 1ns
 COCOTB_HDL_TIMEPRECISION = 1ns
 
 DUT      = test_mii
-TOPLEVEL = $(DUT)
-MODULE   = $(DUT)
+COCOTB_TEST_MODULES = $(DUT)
+COCOTB_TOPLEVEL     = $(DUT)
+MODULE   = $(COCOTB_TEST_MODULES)
+TOPLEVEL = $(COCOTB_TOPLEVEL)
 VERILOG_SOURCES += $(DUT).v
 
 ifeq ($(SIM), icarus)
 	PLUSARGS += -fst
 
-	ifeq ($(WAVES), 1)
-		VERILOG_SOURCES += iverilog_dump.v
-		COMPILE_ARGS += -s iverilog_dump
-	endif
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-P $(COCOTB_TOPLEVEL).$(subst PARAM_,,$(v))=$($(v)))
 else ifeq ($(SIM), verilator)
-	COMPILE_ARGS += -Wno-SELRANGE -Wno-WIDTH
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-G$(subst PARAM_,,$(v))=$($(v)))
 
 	ifeq ($(WAVES), 1)
 		COMPILE_ARGS += --trace-fst
+		VERILATOR_TRACE = 1
 	endif
 endif
 
 include $(shell cocotb-config --makefiles)/Makefile.sim
-
-iverilog_dump.v:
-	echo 'module iverilog_dump();' > $@
-	echo 'initial begin' >> $@
-	echo '    $$dumpfile("$(TOPLEVEL).fst");' >> $@
-	echo '    $$dumpvars(0, $(TOPLEVEL));' >> $@
-	echo 'end' >> $@
-	echo 'endmodule' >> $@
-
-clean::
-	@rm -rf iverilog_dump.v
-	@rm -rf dump.fst $(TOPLEVEL).fst

tests/mii/test_mii.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -47,7 +47,7 @@ class TB:
         self._enable_generator = None
         self._enable_cr = None
 
-        cocotb.fork(Clock(dut.clk, 2, units="ns").start())
+        cocotb.start_soon(Clock(dut.clk, 2, units="ns").start())
 
         self.source = MiiSource(dut.mii_d, dut.mii_er, dut.mii_en,
             dut.clk, dut.rst, dut.mii_clk_en)
@@ -60,10 +60,10 @@ class TB:
         self.dut.rst.setimmediatevalue(0)
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
-        self.dut.rst <= 1
+        self.dut.rst.value = 1
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
-        self.dut.rst <= 0
+        self.dut.rst.value = 0
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
 
@@ -75,15 +75,17 @@ class TB:
         self._enable_generator = generator
 
         if self._enable_generator is not None:
-            self._enable_cr = cocotb.fork(self._run_enable())
+            self._enable_cr = cocotb.start_soon(self._run_enable())
 
     def clear_enable_generator(self):
         self.set_enable_generator(None)
 
     async def _run_enable(self):
+        clock_edge_event = RisingEdge(self.dut.clk)
+
         for val in self._enable_generator:
-            self.dut.mii_clk_en <= val
-            await RisingEdge(self.dut.clk)
+            self.dut.mii_clk_en.value = val
+            await clock_edge_event
 
 
 async def run_test(dut, payload_lengths=None, payload_data=None, ifg=12, enable_gen=None):
@@ -128,7 +130,7 @@ def cycle_en():
     return itertools.cycle([0, 0, 0, 1])
 
 
-if cocotb.SIM_NAME:
+if getattr(cocotb, 'top', None) is not None:
 
     factory = TestFactory(run_test)
     factory.add_option("payload_lengths", [size_list])

tests/mii/test_mii.v

@@ -1,6 +1,6 @@
 /*
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

tests/mii_phy/Makefile

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 Alex Forencich
+# Copyright (c) 2020 Alex-2025 Forencich
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -27,35 +27,23 @@ COCOTB_HDL_TIMEUNIT = 1ns
 COCOTB_HDL_TIMEPRECISION = 1ns
 
 DUT      = test_mii_phy
-TOPLEVEL = $(DUT)
-MODULE   = $(DUT)
+COCOTB_TEST_MODULES = $(DUT)
+COCOTB_TOPLEVEL     = $(DUT)
+MODULE   = $(COCOTB_TEST_MODULES)
+TOPLEVEL = $(COCOTB_TOPLEVEL)
 VERILOG_SOURCES += $(DUT).v
 
 ifeq ($(SIM), icarus)
 	PLUSARGS += -fst
 
-	ifeq ($(WAVES), 1)
-		VERILOG_SOURCES += iverilog_dump.v
-		COMPILE_ARGS += -s iverilog_dump
-	endif
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-P $(COCOTB_TOPLEVEL).$(subst PARAM_,,$(v))=$($(v)))
 else ifeq ($(SIM), verilator)
-	COMPILE_ARGS += -Wno-SELRANGE -Wno-WIDTH
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-G$(subst PARAM_,,$(v))=$($(v)))
 
 	ifeq ($(WAVES), 1)
 		COMPILE_ARGS += --trace-fst
+		VERILATOR_TRACE = 1
 	endif
 endif
 
 include $(shell cocotb-config --makefiles)/Makefile.sim
-
-iverilog_dump.v:
-	echo 'module iverilog_dump();' > $@
-	echo 'initial begin' >> $@
-	echo '    $$dumpfile("$(TOPLEVEL).fst");' >> $@
-	echo '    $$dumpvars(0, $(TOPLEVEL));' >> $@
-	echo 'end' >> $@
-	echo 'endmodule' >> $@
-
-clean::
-	@rm -rf iverilog_dump.v
-	@rm -rf dump.fst $(TOPLEVEL).fst

tests/mii_phy/test_mii_phy.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -55,10 +55,10 @@ class TB:
         self.dut.phy_rst.setimmediatevalue(0)
         await RisingEdge(self.dut.phy_tx_clk)
         await RisingEdge(self.dut.phy_tx_clk)
-        self.dut.phy_rst <= 1
+        self.dut.phy_rst.value = 1
         await RisingEdge(self.dut.phy_tx_clk)
         await RisingEdge(self.dut.phy_tx_clk)
-        self.dut.phy_rst <= 0
+        self.dut.phy_rst.value = 0
         await RisingEdge(self.dut.phy_tx_clk)
         await RisingEdge(self.dut.phy_tx_clk)
 
@@ -131,7 +131,7 @@ def cycle_en():
     return itertools.cycle([0, 0, 0, 1])
 
 
-if cocotb.SIM_NAME:
+if getattr(cocotb, 'top', None) is not None:
 
     for test in [run_test_tx, run_test_rx]:
 

tests/mii_phy/test_mii_phy.v

@@ -1,6 +1,6 @@
 /*
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

tests/ptp_clock/Makefile

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 Alex Forencich
+# Copyright (c) 2020-2025 Alex Forencich
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -27,35 +27,23 @@ COCOTB_HDL_TIMEUNIT = 1ns
 COCOTB_HDL_TIMEPRECISION = 1ps
 
 DUT      = test_ptp_clock
-TOPLEVEL = $(DUT)
-MODULE   = $(DUT)
+COCOTB_TEST_MODULES = $(DUT)
+COCOTB_TOPLEVEL     = $(DUT)
+MODULE   = $(COCOTB_TEST_MODULES)
+TOPLEVEL = $(COCOTB_TOPLEVEL)
 VERILOG_SOURCES += $(DUT).v
 
 ifeq ($(SIM), icarus)
 	PLUSARGS += -fst
 
-	ifeq ($(WAVES), 1)
-		VERILOG_SOURCES += iverilog_dump.v
-		COMPILE_ARGS += -s iverilog_dump
-	endif
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-P $(COCOTB_TOPLEVEL).$(subst PARAM_,,$(v))=$($(v)))
 else ifeq ($(SIM), verilator)
-	COMPILE_ARGS += -Wno-SELRANGE -Wno-WIDTH
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-G$(subst PARAM_,,$(v))=$($(v)))
 
 	ifeq ($(WAVES), 1)
 		COMPILE_ARGS += --trace-fst
+		VERILATOR_TRACE = 1
 	endif
 endif
 
 include $(shell cocotb-config --makefiles)/Makefile.sim
-
-iverilog_dump.v:
-	echo 'module iverilog_dump();' > $@
-	echo 'initial begin' >> $@
-	echo '    $$dumpfile("$(TOPLEVEL).fst");' >> $@
-	echo '    $$dumpvars(0, $(TOPLEVEL));' >> $@
-	echo 'end' >> $@
-	echo 'endmodule' >> $@
-
-clean::
-	@rm -rf iverilog_dump.v
-	@rm -rf dump.fst $(TOPLEVEL).fst

tests/ptp_clock/test_ptp_clock.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -25,12 +25,13 @@ THE SOFTWARE.
 
 import logging
 import os
+from decimal import Decimal
 
 import cocotb_test.simulator
 
 import cocotb
 from cocotb.clock import Clock
-from cocotb.triggers import RisingEdge
+from cocotb.triggers import RisingEdge, ClockCycles
 from cocotb.utils import get_sim_time
 
 from cocotbext.eth import PtpClock
@@ -43,11 +44,11 @@ class TB:
         self.log = logging.getLogger("cocotb.tb")
         self.log.setLevel(logging.DEBUG)
 
-        cocotb.fork(Clock(dut.clk, 6.4, units="ns").start())
+        cocotb.start_soon(Clock(dut.clk, 6.4, units="ns").start())
 
         self.ptp_clock = PtpClock(
-            ts_96=dut.ts_96,
-            ts_64=dut.ts_64,
+            ts_tod=dut.ts_tod,
+            ts_rel=dut.ts_rel,
             ts_step=dut.ts_step,
             pps=dut.pps,
             clock=dut.clk,
@@ -59,13 +60,21 @@ class TB:
         self.dut.rst.setimmediatevalue(0)
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
-        self.dut.rst <= 1
+        self.dut.rst.value = 1
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
-        self.dut.rst <= 0
+        self.dut.rst.value = 0
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
 
+    def get_ts_tod_ns(self):
+        ts = int(self.dut.ts_tod.value)
+        return Decimal(ts >> 48).scaleb(9) + (Decimal(ts & 0xffffffffffff) / Decimal(2**16))
+
+    def get_ts_rel_ns(self):
+        ts = int(self.dut.ts_rel.value)
+        return Decimal(ts) / Decimal(2**16)
+
 
 @cocotb.test()
 async def run_default_rate(dut):
@@ -75,32 +84,32 @@ async def run_default_rate(dut):
     await tb.reset()
 
     await RisingEdge(dut.clk)
-    start_time = get_sim_time('sec')
-    start_ts_96 = (dut.ts_96.value.integer >> 48) + ((dut.ts_96.value.integer & 0xffffffffffff)/2**16*1e-9)
-    start_ts_64 = dut.ts_64.value.integer/2**16*1e-9
+    start_time = Decimal(get_sim_time('fs')).scaleb(-6)
+    start_ts_tod = tb.get_ts_tod_ns()
+    start_ts_rel = tb.get_ts_rel_ns()
 
-    for k in range(10000):
-        await RisingEdge(dut.clk)
+    await ClockCycles(dut.clk, 10000)
 
-    stop_time = get_sim_time('sec')
-    stop_ts_96 = (dut.ts_96.value.integer >> 48) + ((dut.ts_96.value.integer & 0xffffffffffff)/2**16*1e-9)
-    stop_ts_64 = dut.ts_64.value.integer/2**16*1e-9
+    stop_time = Decimal(get_sim_time('fs')).scaleb(-6)
+    stop_ts_tod = tb.get_ts_tod_ns()
+    stop_ts_rel = tb.get_ts_rel_ns()
 
     time_delta = stop_time-start_time
-    ts_96_delta = stop_ts_96-start_ts_96
-    ts_64_delta = stop_ts_64-start_ts_64
+    ts_tod_delta = stop_ts_tod-start_ts_tod
+    ts_rel_delta = stop_ts_rel-start_ts_rel
 
-    ts_96_diff = time_delta - ts_96_delta
-    ts_64_diff = time_delta - ts_64_delta
+    tb.log.info("sim time delta : %s ns", time_delta)
+    tb.log.info("ToD ts delta   : %s ns", ts_tod_delta)
+    tb.log.info("rel ts delta   : %s ns", ts_rel_delta)
 
-    tb.log.info("sim time delta  : %g s", time_delta)
-    tb.log.info("96 bit ts delta : %g s", ts_96_delta)
-    tb.log.info("64 bit ts delta : %g s", ts_64_delta)
-    tb.log.info("96 bit ts diff  : %g s", ts_96_diff)
-    tb.log.info("64 bit ts diff  : %g s", ts_64_diff)
+    ts_tod_diff = time_delta - ts_tod_delta
+    ts_rel_diff = time_delta - ts_rel_delta
 
-    assert abs(ts_96_diff) < 1e-12
-    assert abs(ts_64_diff) < 1e-12
+    tb.log.info("ToD ts diff    : %s ns", ts_tod_diff)
+    tb.log.info("rel ts diff    : %s ns", ts_rel_diff)
+
+    assert abs(ts_tod_diff) < 1e-3
+    assert abs(ts_rel_diff) < 1e-3
 
     await RisingEdge(dut.clk)
     await RisingEdge(dut.clk)
@@ -113,41 +122,41 @@ async def run_load_timestamps(dut):
 
     await tb.reset()
 
-    tb.ptp_clock.set_ts_96(12345678)
-    tb.ptp_clock.set_ts_64(12345678)
+    tb.ptp_clock.set_ts_tod_ns(12345678)
+    tb.ptp_clock.set_ts_rel_ns(12345678)
 
     await RisingEdge(dut.clk)
 
-    assert dut.ts_96.value.integer == 12345678+((tb.ptp_clock.period_ns << 16) + tb.ptp_clock.period_fns)
-    assert dut.ts_64.value.integer == 12345678+((tb.ptp_clock.period_ns << 16) + tb.ptp_clock.period_fns)
-    assert dut.ts_step.value.integer == 1
+    assert int(dut.ts_tod.value) == (12345678 << 16) + (tb.ptp_clock.period_ns << 16) + (tb.ptp_clock.period_fns >> 16)
+    assert int(dut.ts_rel.value) == (12345678 << 16) + (tb.ptp_clock.period_ns << 16) + (tb.ptp_clock.period_fns >> 16)
+    assert int(dut.ts_step.value) == 1
 
-    start_time = get_sim_time('sec')
-    start_ts_96 = (dut.ts_96.value.integer >> 48) + ((dut.ts_96.value.integer & 0xffffffffffff)/2**16*1e-9)
-    start_ts_64 = dut.ts_64.value.integer/2**16*1e-9
+    start_time = Decimal(get_sim_time('fs')).scaleb(-6)
+    start_ts_tod = tb.get_ts_tod_ns()
+    start_ts_rel = tb.get_ts_rel_ns()
 
-    for k in range(2000):
-        await RisingEdge(dut.clk)
+    await ClockCycles(dut.clk, 2000)
 
-    stop_time = get_sim_time('sec')
-    stop_ts_96 = (dut.ts_96.value.integer >> 48) + ((dut.ts_96.value.integer & 0xffffffffffff)/2**16*1e-9)
-    stop_ts_64 = dut.ts_64.value.integer/2**16*1e-9
+    stop_time = Decimal(get_sim_time('fs')).scaleb(-6)
+    stop_ts_tod = tb.get_ts_tod_ns()
+    stop_ts_rel = tb.get_ts_rel_ns()
 
     time_delta = stop_time-start_time
-    ts_96_delta = stop_ts_96-start_ts_96
-    ts_64_delta = stop_ts_64-start_ts_64
+    ts_tod_delta = stop_ts_tod-start_ts_tod
+    ts_rel_delta = stop_ts_rel-start_ts_rel
 
-    ts_96_diff = time_delta - ts_96_delta
-    ts_64_diff = time_delta - ts_64_delta
+    tb.log.info("sim time delta : %s ns", time_delta)
+    tb.log.info("ToD ts delta   : %s ns", ts_tod_delta)
+    tb.log.info("rel ts delta   : %s ns", ts_rel_delta)
 
-    tb.log.info("sim time delta  : %g s", time_delta)
-    tb.log.info("96 bit ts delta : %g s", ts_96_delta)
-    tb.log.info("64 bit ts delta : %g s", ts_64_delta)
-    tb.log.info("96 bit ts diff  : %g s", ts_96_diff)
-    tb.log.info("64 bit ts diff  : %g s", ts_64_diff)
+    ts_tod_diff = time_delta - ts_tod_delta
+    ts_rel_diff = time_delta - ts_rel_delta
 
-    assert abs(ts_96_diff) < 1e-12
-    assert abs(ts_64_diff) < 1e-12
+    tb.log.info("ToD ts diff    : %s ns", ts_tod_diff)
+    tb.log.info("rel ts diff    : %s ns", ts_rel_diff)
+
+    assert abs(ts_tod_diff) < 1e-3
+    assert abs(ts_rel_diff) < 1e-3
 
     await RisingEdge(dut.clk)
     await RisingEdge(dut.clk)
@@ -160,47 +169,48 @@ async def run_seconds_increment(dut):
 
     await tb.reset()
 
-    tb.ptp_clock.set_ts_96(999990000*2**16)
-    tb.ptp_clock.set_ts_64(999990000*2**16)
+    tb.ptp_clock.set_ts_tod_ns(999990000)
+    tb.ptp_clock.set_ts_rel_ns(999990000)
 
     await RisingEdge(dut.clk)
     await RisingEdge(dut.clk)
 
-    start_time = get_sim_time('sec')
-    start_ts_96 = (dut.ts_96.value.integer >> 48) + ((dut.ts_96.value.integer & 0xffffffffffff)/2**16*1e-9)
-    start_ts_64 = dut.ts_64.value.integer/2**16*1e-9
+    start_time = Decimal(get_sim_time('fs')).scaleb(-6)
+    start_ts_tod = tb.get_ts_tod_ns()
+    start_ts_rel = tb.get_ts_rel_ns()
 
     saw_pps = False
 
     for k in range(3000):
         await RisingEdge(dut.clk)
 
-        if dut.pps.value.integer:
+        if int(dut.pps.value):
             saw_pps = True
-            assert dut.ts_96.value.integer >> 48 == 1
-            assert dut.ts_96.value.integer & 0xffffffffffff < 10*2**16
+            assert int(dut.ts_tod.value) >> 48 == 1
+            assert int(dut.ts_tod.value) & 0xffffffffffff < 10*2**16
 
     assert saw_pps
 
-    stop_time = get_sim_time('sec')
-    stop_ts_96 = (dut.ts_96.value.integer >> 48) + ((dut.ts_96.value.integer & 0xffffffffffff)/2**16*1e-9)
-    stop_ts_64 = dut.ts_64.value.integer/2**16*1e-9
+    stop_time = Decimal(get_sim_time('fs')).scaleb(-6)
+    stop_ts_tod = tb.get_ts_tod_ns()
+    stop_ts_rel = tb.get_ts_rel_ns()
 
     time_delta = stop_time-start_time
-    ts_96_delta = stop_ts_96-start_ts_96
-    ts_64_delta = stop_ts_64-start_ts_64
+    ts_tod_delta = stop_ts_tod-start_ts_tod
+    ts_rel_delta = stop_ts_rel-start_ts_rel
 
-    ts_96_diff = time_delta - ts_96_delta
-    ts_64_diff = time_delta - ts_64_delta
+    tb.log.info("sim time delta : %s ns", time_delta)
+    tb.log.info("ToD ts delta   : %s ns", ts_tod_delta)
+    tb.log.info("rel ts delta   : %s ns", ts_rel_delta)
 
-    tb.log.info("sim time delta  : %g s", time_delta)
-    tb.log.info("96 bit ts delta : %g s", ts_96_delta)
-    tb.log.info("64 bit ts delta : %g s", ts_64_delta)
-    tb.log.info("96 bit ts diff  : %g s", ts_96_diff)
-    tb.log.info("64 bit ts diff  : %g s", ts_64_diff)
+    ts_tod_diff = time_delta - ts_tod_delta
+    ts_rel_diff = time_delta - ts_rel_delta
 
-    assert abs(ts_96_diff) < 1e-12
-    assert abs(ts_64_diff) < 1e-12
+    tb.log.info("ToD ts diff    : %s ns", ts_tod_diff)
+    tb.log.info("rel ts diff    : %s ns", ts_rel_diff)
+
+    assert abs(ts_tod_diff) < 1e-3
+    assert abs(ts_rel_diff) < 1e-3
 
     await RisingEdge(dut.clk)
     await RisingEdge(dut.clk)
@@ -213,36 +223,35 @@ async def run_frequency_adjustment(dut):
 
     await tb.reset()
 
-    tb.ptp_clock.period_ns = 0x6
-    tb.ptp_clock.period_fns = 0x6624
+    tb.ptp_clock.set_period(0x6, 0x66240000)
 
     await RisingEdge(dut.clk)
-    start_time = get_sim_time('sec')
-    start_ts_96 = (dut.ts_96.value.integer >> 48) + ((dut.ts_96.value.integer & 0xffffffffffff)/2**16*1e-9)
-    start_ts_64 = dut.ts_64.value.integer/2**16*1e-9
+    start_time = Decimal(get_sim_time('fs')).scaleb(-6)
+    start_ts_tod = tb.get_ts_tod_ns()
+    start_ts_rel = tb.get_ts_rel_ns()
 
-    for k in range(10000):
-        await RisingEdge(dut.clk)
+    await ClockCycles(dut.clk, 10000)
 
-    stop_time = get_sim_time('sec')
-    stop_ts_96 = (dut.ts_96.value.integer >> 48) + ((dut.ts_96.value.integer & 0xffffffffffff)/2**16*1e-9)
-    stop_ts_64 = dut.ts_64.value.integer/2**16*1e-9
+    stop_time = Decimal(get_sim_time('fs')).scaleb(-6)
+    stop_ts_tod = tb.get_ts_tod_ns()
+    stop_ts_rel = tb.get_ts_rel_ns()
 
     time_delta = stop_time-start_time
-    ts_96_delta = stop_ts_96-start_ts_96
-    ts_64_delta = stop_ts_64-start_ts_64
+    ts_tod_delta = stop_ts_tod-start_ts_tod
+    ts_rel_delta = stop_ts_rel-start_ts_rel
 
-    ts_96_diff = time_delta - ts_96_delta * 6.4/(6+(0x6624+2/5)/2**16)
-    ts_64_diff = time_delta - ts_64_delta * 6.4/(6+(0x6624+2/5)/2**16)
+    tb.log.info("sim time delta : %s ns", time_delta)
+    tb.log.info("ToD ts delta   : %s ns", ts_tod_delta)
+    tb.log.info("rel ts delta   : %s ns", ts_rel_delta)
 
-    tb.log.info("sim time delta  : %g s", time_delta)
-    tb.log.info("96 bit ts delta : %g s", ts_96_delta)
-    tb.log.info("64 bit ts delta : %g s", ts_64_delta)
-    tb.log.info("96 bit ts diff  : %g s", ts_96_diff)
-    tb.log.info("64 bit ts diff  : %g s", ts_64_diff)
+    ts_tod_diff = time_delta - ts_tod_delta * Decimal(6.4)/tb.ptp_clock.get_period_ns()
+    ts_rel_diff = time_delta - ts_rel_delta * Decimal(6.4)/tb.ptp_clock.get_period_ns()
 
-    assert abs(ts_96_diff) < 1e-12
-    assert abs(ts_64_diff) < 1e-12
+    tb.log.info("ToD ts diff    : %s ns", ts_tod_diff)
+    tb.log.info("rel ts diff    : %s ns", ts_rel_diff)
+
+    assert abs(ts_tod_diff) < 1e-3
+    assert abs(ts_rel_diff) < 1e-3
 
     await RisingEdge(dut.clk)
     await RisingEdge(dut.clk)
@@ -255,37 +264,35 @@ async def run_drift_adjustment(dut):
 
     await tb.reset()
 
-    tb.ptp_clock.drift_ns = 0
-    tb.ptp_clock.drift_fns = 20
-    tb.ptp_clock.drift_rate = 5
+    tb.ptp_clock.set_drift(20000, 5)
 
     await RisingEdge(dut.clk)
-    start_time = get_sim_time('sec')
-    start_ts_96 = (dut.ts_96.value.integer >> 48) + ((dut.ts_96.value.integer & 0xffffffffffff)/2**16*1e-9)
-    start_ts_64 = dut.ts_64.value.integer/2**16*1e-9
+    start_time = Decimal(get_sim_time('fs')).scaleb(-6)
+    start_ts_tod = tb.get_ts_tod_ns()
+    start_ts_rel = tb.get_ts_rel_ns()
 
-    for k in range(10000):
-        await RisingEdge(dut.clk)
+    await ClockCycles(dut.clk, 10000)
 
-    stop_time = get_sim_time('sec')
-    stop_ts_96 = (dut.ts_96.value.integer >> 48) + ((dut.ts_96.value.integer & 0xffffffffffff)/2**16*1e-9)
-    stop_ts_64 = dut.ts_64.value.integer/2**16*1e-9
+    stop_time = Decimal(get_sim_time('fs')).scaleb(-6)
+    stop_ts_tod = tb.get_ts_tod_ns()
+    stop_ts_rel = tb.get_ts_rel_ns()
 
     time_delta = stop_time-start_time
-    ts_96_delta = stop_ts_96-start_ts_96
-    ts_64_delta = stop_ts_64-start_ts_64
+    ts_tod_delta = stop_ts_tod-start_ts_tod
+    ts_rel_delta = stop_ts_rel-start_ts_rel
 
-    ts_96_diff = time_delta - ts_96_delta * 6.4/(6+(0x6666+20/5)/2**16)
-    ts_64_diff = time_delta - ts_64_delta * 6.4/(6+(0x6666+20/5)/2**16)
+    tb.log.info("sim time delta : %s ns", time_delta)
+    tb.log.info("ToD ts delta   : %s ns", ts_tod_delta)
+    tb.log.info("rel ts delta   : %s ns", ts_rel_delta)
 
-    tb.log.info("sim time delta  : %g s", time_delta)
-    tb.log.info("96 bit ts delta : %g s", ts_96_delta)
-    tb.log.info("64 bit ts delta : %g s", ts_64_delta)
-    tb.log.info("96 bit ts diff  : %g s", ts_96_diff)
-    tb.log.info("64 bit ts diff  : %g s", ts_64_diff)
+    ts_tod_diff = time_delta - ts_tod_delta * Decimal(6.4)/tb.ptp_clock.get_period_ns()
+    ts_rel_diff = time_delta - ts_rel_delta * Decimal(6.4)/tb.ptp_clock.get_period_ns()
 
-    assert abs(ts_96_diff) < 1e-12
-    assert abs(ts_64_diff) < 1e-12
+    tb.log.info("ToD ts diff    : %s ns", ts_tod_diff)
+    tb.log.info("rel ts diff    : %s ns", ts_rel_diff)
+
+    assert abs(ts_tod_diff) < 1e-3
+    assert abs(ts_rel_diff) < 1e-3
 
     await RisingEdge(dut.clk)
     await RisingEdge(dut.clk)

tests/ptp_clock/test_ptp_clock.v

@@ -1,6 +1,6 @@
 /*
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -34,8 +34,8 @@ module test_ptp_clock
     input  wire        clk,
     input  wire        rst,
 
-    inout  wire [95:0] ts_96,
-    inout  wire [63:0] ts_64,
+    inout  wire [95:0] ts_tod,
+    inout  wire [63:0] ts_rel,
     inout  wire        ts_step,
     inout  wire        pps
 );

tests/ptp_clock_sim_time/Makefile

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 Alex Forencich
+# Copyright (c) 2020-2025 Alex Forencich
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -27,35 +27,23 @@ COCOTB_HDL_TIMEUNIT = 1ns
 COCOTB_HDL_TIMEPRECISION = 1ps
 
 DUT      = test_ptp_clock_sim_time
-TOPLEVEL = $(DUT)
-MODULE   = $(DUT)
+COCOTB_TEST_MODULES = $(DUT)
+COCOTB_TOPLEVEL     = $(DUT)
+MODULE   = $(COCOTB_TEST_MODULES)
+TOPLEVEL = $(COCOTB_TOPLEVEL)
 VERILOG_SOURCES += $(DUT).v
 
 ifeq ($(SIM), icarus)
 	PLUSARGS += -fst
 
-	ifeq ($(WAVES), 1)
-		VERILOG_SOURCES += iverilog_dump.v
-		COMPILE_ARGS += -s iverilog_dump
-	endif
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-P $(COCOTB_TOPLEVEL).$(subst PARAM_,,$(v))=$($(v)))
 else ifeq ($(SIM), verilator)
-	COMPILE_ARGS += -Wno-SELRANGE -Wno-WIDTH
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-G$(subst PARAM_,,$(v))=$($(v)))
 
 	ifeq ($(WAVES), 1)
 		COMPILE_ARGS += --trace-fst
+		VERILATOR_TRACE = 1
 	endif
 endif
 
 include $(shell cocotb-config --makefiles)/Makefile.sim
-
-iverilog_dump.v:
-	echo 'module iverilog_dump();' > $@
-	echo 'initial begin' >> $@
-	echo '    $$dumpfile("$(TOPLEVEL).fst");' >> $@
-	echo '    $$dumpvars(0, $(TOPLEVEL));' >> $@
-	echo 'end' >> $@
-	echo 'endmodule' >> $@
-
-clean::
-	@rm -rf iverilog_dump.v
-	@rm -rf dump.fst $(TOPLEVEL).fst

tests/ptp_clock_sim_time/test_ptp_clock_sim_time.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 """
 
-Copyright (c) 2021 Alex Forencich
+Copyright (c) 2021-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -25,12 +25,13 @@ THE SOFTWARE.
 
 import logging
 import os
+from decimal import Decimal
 
 import cocotb_test.simulator
 
 import cocotb
 from cocotb.clock import Clock
-from cocotb.triggers import RisingEdge
+from cocotb.triggers import RisingEdge, ClockCycles
 from cocotb.utils import get_sim_time
 
 from cocotbext.eth import PtpClockSimTime
@@ -43,15 +44,23 @@ class TB:
         self.log = logging.getLogger("cocotb.tb")
         self.log.setLevel(logging.DEBUG)
 
-        cocotb.fork(Clock(dut.clk, 6.4, units="ns").start())
+        cocotb.start_soon(Clock(dut.clk, 6.4, units="ns").start())
 
         self.ptp_clock = PtpClockSimTime(
-            ts_96=dut.ts_96,
-            ts_64=dut.ts_64,
+            ts_tod=dut.ts_tod,
+            ts_rel=dut.ts_rel,
             pps=dut.pps,
             clock=dut.clk
         )
 
+    def get_ts_tod_ns(self):
+        ts = int(self.dut.ts_tod.value)
+        return Decimal(ts >> 48).scaleb(9) + (Decimal(ts & 0xffffffffffff) / Decimal(2**16))
+
+    def get_ts_rel_ns(self):
+        ts = int(self.dut.ts_rel.value)
+        return Decimal(ts) / Decimal(2**16)
+
 
 @cocotb.test()
 async def run_test(dut):
@@ -62,32 +71,32 @@ async def run_test(dut):
     await RisingEdge(dut.clk)
 
     await RisingEdge(dut.clk)
-    start_time = get_sim_time('sec')
-    start_ts_96 = (dut.ts_96.value.integer >> 48) + ((dut.ts_96.value.integer & 0xffffffffffff)/2**16*1e-9)
-    start_ts_64 = dut.ts_64.value.integer/2**16*1e-9
+    start_time = Decimal(get_sim_time('fs')).scaleb(-6)
+    start_ts_tod = tb.get_ts_tod_ns()
+    start_ts_rel = tb.get_ts_rel_ns()
 
-    for k in range(10000):
-        await RisingEdge(dut.clk)
+    await ClockCycles(dut.clk, 10000)
 
-    stop_time = get_sim_time('sec')
-    stop_ts_96 = (dut.ts_96.value.integer >> 48) + ((dut.ts_96.value.integer & 0xffffffffffff)/2**16*1e-9)
-    stop_ts_64 = dut.ts_64.value.integer/2**16*1e-9
+    stop_time = Decimal(get_sim_time('fs')).scaleb(-6)
+    stop_ts_tod = tb.get_ts_tod_ns()
+    stop_ts_rel = tb.get_ts_rel_ns()
 
     time_delta = stop_time-start_time
-    ts_96_delta = stop_ts_96-start_ts_96
-    ts_64_delta = stop_ts_64-start_ts_64
+    ts_tod_delta = stop_ts_tod-start_ts_tod
+    ts_rel_delta = stop_ts_rel-start_ts_rel
 
-    ts_96_diff = time_delta - ts_96_delta
-    ts_64_diff = time_delta - ts_64_delta
+    tb.log.info("sim time delta : %s ns", time_delta)
+    tb.log.info("ToD ts delta   : %s ns", ts_tod_delta)
+    tb.log.info("rel ts delta   : %s ns", ts_rel_delta)
 
-    tb.log.info("sim time delta  : %g s", time_delta)
-    tb.log.info("96 bit ts delta : %g s", ts_96_delta)
-    tb.log.info("64 bit ts delta : %g s", ts_64_delta)
-    tb.log.info("96 bit ts diff  : %g s", ts_96_diff)
-    tb.log.info("64 bit ts diff  : %g s", ts_64_diff)
+    ts_tod_diff = time_delta - ts_tod_delta
+    ts_rel_diff = time_delta - ts_rel_delta
 
-    assert abs(ts_96_diff) < 1e-12
-    assert abs(ts_64_diff) < 1e-12
+    tb.log.info("ToD ts diff    : %s ns", ts_tod_diff)
+    tb.log.info("rel ts diff    : %s ns", ts_rel_diff)
+
+    assert abs(ts_tod_diff) < 1e-3
+    assert abs(ts_rel_diff) < 1e-3
 
     await RisingEdge(dut.clk)
     await RisingEdge(dut.clk)

tests/ptp_clock_sim_time/test_ptp_clock_sim_time.v

@@ -1,6 +1,6 @@
 /*
 
-Copyright (c) 2021 Alex Forencich
+Copyright (c) 2021-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -33,8 +33,8 @@ module test_ptp_clock_sim_time
 (
     input  wire        clk,
 
-    inout  wire [95:0] ts_96,
-    inout  wire [63:0] ts_64,
+    inout  wire [95:0] ts_tod,
+    inout  wire [63:0] ts_rel,
     inout  wire        pps
 );
 

tests/rgmii/Makefile

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 Alex Forencich
+# Copyright (c) 2020-2025 Alex Forencich
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -27,35 +27,23 @@ COCOTB_HDL_TIMEUNIT = 1ns
 COCOTB_HDL_TIMEPRECISION = 1ns
 
 DUT      = test_rgmii
-TOPLEVEL = $(DUT)
-MODULE   = $(DUT)
+COCOTB_TEST_MODULES = $(DUT)
+COCOTB_TOPLEVEL     = $(DUT)
+MODULE   = $(COCOTB_TEST_MODULES)
+TOPLEVEL = $(COCOTB_TOPLEVEL)
 VERILOG_SOURCES += $(DUT).v
 
 ifeq ($(SIM), icarus)
 	PLUSARGS += -fst
 
-	ifeq ($(WAVES), 1)
-		VERILOG_SOURCES += iverilog_dump.v
-		COMPILE_ARGS += -s iverilog_dump
-	endif
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-P $(COCOTB_TOPLEVEL).$(subst PARAM_,,$(v))=$($(v)))
 else ifeq ($(SIM), verilator)
-	COMPILE_ARGS += -Wno-SELRANGE -Wno-WIDTH
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-G$(subst PARAM_,,$(v))=$($(v)))
 
 	ifeq ($(WAVES), 1)
 		COMPILE_ARGS += --trace-fst
+		VERILATOR_TRACE = 1
 	endif
 endif
 
 include $(shell cocotb-config --makefiles)/Makefile.sim
-
-iverilog_dump.v:
-	echo 'module iverilog_dump();' > $@
-	echo 'initial begin' >> $@
-	echo '    $$dumpfile("$(TOPLEVEL).fst");' >> $@
-	echo '    $$dumpvars(0, $(TOPLEVEL));' >> $@
-	echo 'end' >> $@
-	echo 'endmodule' >> $@
-
-clean::
-	@rm -rf iverilog_dump.v
-	@rm -rf dump.fst $(TOPLEVEL).fst

tests/rgmii/test_rgmii.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -47,7 +47,7 @@ class TB:
         self._enable_generator = None
         self._enable_cr = None
 
-        cocotb.fork(Clock(dut.clk, 2, units="ns").start())
+        cocotb.start_soon(Clock(dut.clk, 2, units="ns").start())
 
         self.source = RgmiiSource(dut.rgmii_d, dut.rgmii_ctl, dut.clk, dut.rst, dut.rgmii_clk_en, dut.rgmii_mii_sel)
         self.sink = RgmiiSink(dut.rgmii_d, dut.rgmii_ctl, dut.clk, dut.rst, dut.rgmii_clk_en, dut.rgmii_mii_sel)
@@ -59,10 +59,10 @@ class TB:
         self.dut.rst.setimmediatevalue(0)
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
-        self.dut.rst <= 1
+        self.dut.rst.value = 1
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
-        self.dut.rst <= 0
+        self.dut.rst.value = 0
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
 
@@ -74,15 +74,17 @@ class TB:
         self._enable_generator = generator
 
         if self._enable_generator is not None:
-            self._enable_cr = cocotb.fork(self._run_enable())
+            self._enable_cr = cocotb.start_soon(self._run_enable())
 
     def clear_enable_generator(self):
         self.set_enable_generator(None)
 
     async def _run_enable(self):
+        clock_edge_event = RisingEdge(self.dut.clk)
+
         for val in self._enable_generator:
-            self.dut.rgmii_clk_en <= val
-            await RisingEdge(self.dut.clk)
+            self.dut.rgmii_clk_en.value = val
+            await clock_edge_event
 
 
 async def run_test(dut, payload_lengths=None, payload_data=None, ifg=12, enable_gen=None, mii_sel=False):
@@ -90,7 +92,7 @@ async def run_test(dut, payload_lengths=None, payload_data=None, ifg=12, enable_
     tb = TB(dut)
 
     tb.source.ifg = ifg
-    tb.dut.rgmii_mii_sel <= mii_sel
+    tb.dut.rgmii_mii_sel.value = mii_sel
 
     if enable_gen is not None:
         tb.set_enable_generator(enable_gen())
@@ -128,7 +130,7 @@ def cycle_en():
     return itertools.cycle([0, 0, 0, 1])
 
 
-if cocotb.SIM_NAME:
+if getattr(cocotb, 'top', None) is not None:
 
     factory = TestFactory(run_test)
     factory.add_option("payload_lengths", [size_list])

tests/rgmii/test_rgmii.v

@@ -1,6 +1,6 @@
 /*
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

tests/rgmii_phy/Makefile

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 Alex Forencich
+# Copyright (c) 2020-2025 Alex Forencich
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -27,35 +27,23 @@ COCOTB_HDL_TIMEUNIT = 1ns
 COCOTB_HDL_TIMEPRECISION = 1ns
 
 DUT      = test_rgmii_phy
-TOPLEVEL = $(DUT)
-MODULE   = $(DUT)
+COCOTB_TEST_MODULES = $(DUT)
+COCOTB_TOPLEVEL     = $(DUT)
+MODULE   = $(COCOTB_TEST_MODULES)
+TOPLEVEL = $(COCOTB_TOPLEVEL)
 VERILOG_SOURCES += $(DUT).v
 
 ifeq ($(SIM), icarus)
 	PLUSARGS += -fst
 
-	ifeq ($(WAVES), 1)
-		VERILOG_SOURCES += iverilog_dump.v
-		COMPILE_ARGS += -s iverilog_dump
-	endif
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-P $(COCOTB_TOPLEVEL).$(subst PARAM_,,$(v))=$($(v)))
 else ifeq ($(SIM), verilator)
-	COMPILE_ARGS += -Wno-SELRANGE -Wno-WIDTH
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-G$(subst PARAM_,,$(v))=$($(v)))
 
 	ifeq ($(WAVES), 1)
 		COMPILE_ARGS += --trace-fst
+		VERILATOR_TRACE = 1
 	endif
 endif
 
 include $(shell cocotb-config --makefiles)/Makefile.sim
-
-iverilog_dump.v:
-	echo 'module iverilog_dump();' > $@
-	echo 'initial begin' >> $@
-	echo '    $$dumpfile("$(TOPLEVEL).fst");' >> $@
-	echo '    $$dumpvars(0, $(TOPLEVEL));' >> $@
-	echo 'end' >> $@
-	echo 'endmodule' >> $@
-
-clean::
-	@rm -rf iverilog_dump.v
-	@rm -rf dump.fst $(TOPLEVEL).fst

tests/rgmii_phy/test_rgmii_phy.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -45,11 +45,11 @@ class TB:
         self.log.setLevel(logging.DEBUG)
 
         if speed == 1000e6:
-            cocotb.fork(Clock(dut.phy_tx_clk, 8, units="ns").start())
+            cocotb.start_soon(Clock(dut.phy_tx_clk, 8, units="ns").start())
         elif speed == 100e6:
-            cocotb.fork(Clock(dut.phy_tx_clk, 40, units="ns").start())
+            cocotb.start_soon(Clock(dut.phy_tx_clk, 40, units="ns").start())
         elif speed == 10e6:
-            cocotb.fork(Clock(dut.phy_tx_clk, 400, units="ns").start())
+            cocotb.start_soon(Clock(dut.phy_tx_clk, 400, units="ns").start())
 
         self.rgmii_phy = RgmiiPhy(dut.phy_txd, dut.phy_tx_ctl, dut.phy_tx_clk,
             dut.phy_rxd, dut.phy_rx_ctl, dut.phy_rx_clk, dut.phy_rst, speed=speed)
@@ -68,10 +68,10 @@ class TB:
         self.dut.phy_rst.setimmediatevalue(0)
         await RisingEdge(self.dut.phy_tx_clk)
         await RisingEdge(self.dut.phy_tx_clk)
-        self.dut.phy_rst <= 1
+        self.dut.phy_rst.value = 1
         await RisingEdge(self.dut.phy_tx_clk)
         await RisingEdge(self.dut.phy_tx_clk)
-        self.dut.phy_rst <= 0
+        self.dut.phy_rst.value = 0
         await RisingEdge(self.dut.phy_tx_clk)
         await RisingEdge(self.dut.phy_tx_clk)
 
@@ -144,7 +144,7 @@ def cycle_en():
     return itertools.cycle([0, 0, 0, 1])
 
 
-if cocotb.SIM_NAME:
+if getattr(cocotb, 'top', None) is not None:
 
     for test in [run_test_tx, run_test_rx]:
 

tests/rgmii_phy/test_rgmii_phy.v

@@ -1,6 +1,6 @@
 /*
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

tests/xgmii/Makefile

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 Alex Forencich
+# Copyright (c) 2020-2025 Alex Forencich
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -27,45 +27,27 @@ COCOTB_HDL_TIMEUNIT = 1ns
 COCOTB_HDL_TIMEPRECISION = 1ns
 
 DUT      = test_xgmii
-TOPLEVEL = $(DUT)
-MODULE   = $(DUT)
+COCOTB_TEST_MODULES = $(DUT)
+COCOTB_TOPLEVEL     = $(DUT)
+MODULE   = $(COCOTB_TEST_MODULES)
+TOPLEVEL = $(COCOTB_TOPLEVEL)
 VERILOG_SOURCES += $(DUT).v
 
 # module parameters
-export PARAM_DATA_WIDTH ?= 64
-export PARAM_CTRL_WIDTH ?= $(shell expr $(PARAM_DATA_WIDTH) / 8 )
+export PARAM_DATA_WIDTH := 64
+export PARAM_CTRL_WIDTH := $(shell expr $(PARAM_DATA_WIDTH) / 8 )
 
 ifeq ($(SIM), icarus)
 	PLUSARGS += -fst
 
-	COMPILE_ARGS += -P $(TOPLEVEL).DATA_WIDTH=$(PARAM_DATA_WIDTH)
-	COMPILE_ARGS += -P $(TOPLEVEL).CTRL_WIDTH=$(PARAM_CTRL_WIDTH)
-
-	ifeq ($(WAVES), 1)
-		VERILOG_SOURCES += iverilog_dump.v
-		COMPILE_ARGS += -s iverilog_dump
-	endif
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-P $(COCOTB_TOPLEVEL).$(subst PARAM_,,$(v))=$($(v)))
 else ifeq ($(SIM), verilator)
-	COMPILE_ARGS += -Wno-SELRANGE -Wno-WIDTH
-
-	COMPILE_ARGS += -GDATA_WIDTH=$(PARAM_DATA_WIDTH)
-	COMPILE_ARGS += -GCTRL_WIDTH=$(PARAM_CTRL_WIDTH)
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-G$(subst PARAM_,,$(v))=$($(v)))
 
 	ifeq ($(WAVES), 1)
 		COMPILE_ARGS += --trace-fst
+		VERILATOR_TRACE = 1
 	endif
 endif
 
 include $(shell cocotb-config --makefiles)/Makefile.sim
-
-iverilog_dump.v:
-	echo 'module iverilog_dump();' > $@
-	echo 'initial begin' >> $@
-	echo '    $$dumpfile("$(TOPLEVEL).fst");' >> $@
-	echo '    $$dumpvars(0, $(TOPLEVEL));' >> $@
-	echo 'end' >> $@
-	echo 'endmodule' >> $@
-
-clean::
-	@rm -rf iverilog_dump.v
-	@rm -rf dump.fst $(TOPLEVEL).fst

tests/xgmii/test_xgmii.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 """
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -48,7 +48,7 @@ class TB:
         self._enable_generator = None
         self._enable_cr = None
 
-        cocotb.fork(Clock(dut.clk, 2, units="ns").start())
+        cocotb.start_soon(Clock(dut.clk, 2, units="ns").start())
 
         self.source = XgmiiSource(dut.xgmii_d, dut.xgmii_c, dut.clk, dut.rst, dut.xgmii_clk_en)
         self.sink = XgmiiSink(dut.xgmii_d, dut.xgmii_c, dut.clk, dut.rst, dut.xgmii_clk_en)
@@ -59,10 +59,10 @@ class TB:
         self.dut.rst.setimmediatevalue(0)
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
-        self.dut.rst <= 1
+        self.dut.rst.value = 1
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
-        self.dut.rst <= 0
+        self.dut.rst.value = 0
         await RisingEdge(self.dut.clk)
         await RisingEdge(self.dut.clk)
 
@@ -74,15 +74,17 @@ class TB:
         self._enable_generator = generator
 
         if self._enable_generator is not None:
-            self._enable_cr = cocotb.fork(self._run_enable())
+            self._enable_cr = cocotb.start_soon(self._run_enable())
 
     def clear_enable_generator(self):
         self.set_enable_generator(None)
 
     async def _run_enable(self):
+        clock_edge_event = RisingEdge(self.dut.clk)
+
         for val in self._enable_generator:
-            self.dut.xgmii_clk_en <= val
-            await RisingEdge(self.dut.clk)
+            self.dut.xgmii_clk_en.value = val
+            await clock_edge_event
 
 
 async def run_test(dut, payload_lengths=None, payload_data=None, ifg=12, enable_dic=True,
@@ -123,7 +125,7 @@ async def run_test_alignment(dut, payload_data=None, ifg=12, enable_dic=True,
 
     tb = TB(dut)
 
-    byte_width = tb.source.width // 8
+    byte_lanes = tb.source.byte_lanes
 
     tb.source.ifg = ifg
     tb.source.enable_dic = enable_dic
@@ -164,23 +166,23 @@ async def run_test_alignment(dut, payload_data=None, ifg=12, enable_dic=True,
         for test_data in test_frames:
             if ifg == 0:
                 lane = 0
-            if force_offset_start and byte_width > 4:
+            if force_offset_start and byte_lanes > 4:
                 lane = 4
 
             start_lane_ref.append(lane)
-            lane = (lane + len(test_data)+4+ifg) % byte_width
+            lane = (lane + len(test_data)+4+ifg) % byte_lanes
 
             if enable_dic:
                 offset = lane % 4
                 if deficit_idle_count+offset >= 4:
                     offset += 4
-                lane = (lane - offset) % byte_width
+                lane = (lane - offset) % byte_lanes
                 deficit_idle_count = (deficit_idle_count + offset) % 4
             else:
                 offset = lane % 4
                 if offset > 0:
                     offset += 4
-                lane = (lane - offset) % byte_width
+                lane = (lane - offset) % byte_lanes
 
         tb.log.info("start_lane_ref: %s", start_lane_ref)
 
@@ -206,7 +208,7 @@ def cycle_en():
     return itertools.cycle([0, 0, 0, 1])
 
 
-if cocotb.SIM_NAME:
+if getattr(cocotb, 'top', None) is not None:
 
     factory = TestFactory(run_test)
     factory.add_option("payload_lengths", [size_list])

tests/xgmii/test_xgmii.v

@@ -1,6 +1,6 @@
 /*
 
-Copyright (c) 2020 Alex Forencich
+Copyright (c) 2020-2025 Alex Forencich
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal