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
 
@@ -585,15 +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,
@@ -603,17 +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
@@ -623,74 +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
@@ -43,8 +43,8 @@ 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
@@ -53,7 +53,7 @@ class EthMacFrame:
         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
@@ -61,7 +61,7 @@ class EthMacFrame:
             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
@@ -133,11 +133,14 @@ class EthMacTx(Reset):
         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)
@@ -176,7 +179,7 @@ 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:
+        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")
@@ -191,11 +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_tag:
+        if self.ptp_ts_tag is not None:
             self.ptp_ts_tag.setimmediatevalue(0)
-        if self.ptp_ts_valid:
+        if self.ptp_ts_valid is not None:
             self.ptp_ts_valid.setimmediatevalue(0)
 
         self._run_cr = None
@@ -252,8 +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
 
@@ -262,9 +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
@@ -274,7 +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
@@ -282,9 +287,9 @@ class EthMacTx(Reset):
 
             frame.sim_time_sfd = get_sim_time()
 
-            if self.ptp_time:
-                frame.ptp_timestamp = self.ptp_time.value.integer
-                frame.ptp_tag = cycle.tuser.integer >> 1
+            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
@@ -292,14 +297,15 @@ class EthMacTx(Reset):
                 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)
 
@@ -322,16 +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, tag = self.ts_queue.get_nowait()
-                self.ptp_ts <= ts
+                self.ptp_ts.value = ts
                 if self.ptp_ts_tag is not None:
-                    self.ptp_ts_tag <= tag
-                self.ptp_ts_valid <= 1
+                    self.ptp_ts_tag.value = tag
+                self.ptp_ts_valid.value = 1
 
 
 class EthMacRx(Reset):
@@ -344,11 +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)
@@ -391,7 +402,7 @@ 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:
+        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")
@@ -475,7 +486,7 @@ 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
@@ -502,8 +513,8 @@ class EthMacRx(Reset):
 
             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

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)
@@ -251,10 +255,11 @@ 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
@@ -264,10 +269,16 @@ class GmiiSource(Reset):
         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
@@ -286,7 +297,7 @@ 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:
                         # convert to MII
@@ -308,10 +319,10 @@ class GmiiSource(Reset):
                     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[frame_offset]
-                    self.dv <= 1
+                        self.er.value = frame_error[frame_offset]
+                    self.dv.value = 1
                     frame_offset += 1
 
                     if frame_offset >= len(frame_data):
@@ -321,12 +332,19 @@ class GmiiSource(Reset):
                         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):
@@ -343,7 +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)
@@ -422,19 +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:
@@ -446,7 +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
@@ -488,6 +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,
@@ -517,12 +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
@@ -536,8 +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)
@@ -152,10 +156,11 @@ 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
@@ -165,10 +170,16 @@ class MiiSource(Reset):
         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
@@ -202,10 +213,10 @@ class MiiSource(Reset):
                     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[frame_offset]
-                    self.dv <= 1
+                        self.er.value = frame_error[frame_offset]
+                    self.dv.value = 1
                     frame_offset += 1
 
                     if frame_offset >= len(frame_data):
@@ -215,12 +226,19 @@ class MiiSource(Reset):
                         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):
@@ -236,7 +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)
@@ -313,19 +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:
@@ -374,6 +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,
@@ -402,7 +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')
@@ -410,8 +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)
@@ -150,10 +154,11 @@ 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
@@ -161,22 +166,39 @@ class RgmiiSource(Reset):
         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
@@ -192,7 +214,7 @@ 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:
                         # convert to MII
@@ -221,6 +243,7 @@ class RgmiiSource(Reset):
 
                     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
@@ -230,13 +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):
@@ -254,7 +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)
@@ -323,14 +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
@@ -339,20 +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:
@@ -364,7 +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
@@ -406,6 +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,
@@ -434,11 +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
 
@@ -448,6 +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__ = "0.1.16"
+__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
@@ -200,6 +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
 
@@ -209,6 +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
 
@@ -236,6 +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
 
@@ -250,8 +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)
@@ -260,10 +264,11 @@ 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
@@ -272,10 +277,16 @@ class XgmiiSource(Reset):
         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:
+        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_lanes
@@ -351,13 +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):
@@ -372,7 +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)
@@ -450,19 +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:
+        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 = (self.data.value.integer >> (offset*8)) & 0xff
-                    c_val = (self.ctrl.value.integer >> offset) & 1
+                    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:
@@ -495,3 +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,
@@ -64,12 +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
         )
 
@@ -81,12 +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)
 
@@ -155,14 +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()
 
 
@@ -171,7 +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
@@ -182,6 +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
@@ -29,29 +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 [16:0] 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 [15:0] tx_ptp_ts_tag,
+    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,
@@ -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