xfcp: Symlinks for common testbench code

Signed-off-by: Alex Forencich <alex@alexforencich.com>
This commit is contained in:
Alex Forencich
2025-09-30 20:59:58 -07:00
parent 8f5a534d35
commit 86f52189b5
4 changed files with 4 additions and 636 deletions

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# SPDX-License-Identifier: MIT
"""
Copyright (c) 2017-2025 FPGA Ninja, LLC
Authors:
- Alex Forencich
"""
import struct
def cobs_encode(block):
block = bytes(block)
enc = bytearray()
seg = bytearray()
code = 1
new_data = True
for b in block:
if b == 0:
enc.append(code)
enc.extend(seg)
code = 1
seg = bytearray()
new_data = True
else:
code += 1
seg.append(b)
new_data = True
if code == 255:
enc.append(code)
enc.extend(seg)
code = 1
seg = bytearray()
new_data = False
if new_data:
enc.append(code)
enc.extend(seg)
return bytes(enc)
def cobs_decode(block):
block = bytes(block)
dec = bytearray()
code = 0
i = 0
if 0 in block:
return None
while i < len(block):
code = block[i]
i += 1
if i+code-1 > len(block):
return None
dec.extend(block[i:i+code-1])
i += code-1
if code < 255 and i < len(block):
dec.append(0)
return bytes(dec)
class XfcpFrame(object):
def __init__(self, payload=b'', path=[], rpath=[], ptype=0):
self._payload = b''
self.path = path
self.rpath = rpath
self.ptype = ptype
if type(payload) is bytes:
self.payload = payload
if type(payload) is XfcpFrame:
self.payload = payload.payload
self.path = list(payload.path)
self.rpath = list(payload.rpath)
self.ptype = payload.ptype
@property
def payload(self):
return self._payload
@payload.setter
def payload(self, value):
self._payload = bytes(value)
def build(self):
data = bytearray()
for p in self.path:
data.extend(struct.pack('B', p))
if self.rpath:
data.extend(struct.pack('B', 0xFE))
for p in self.rpath:
data.extend(struct.pack('B', p))
data.extend(struct.pack('B', 0xFF))
data.extend(struct.pack('B', self.ptype))
data.extend(self.payload)
return data
def build_cobs(self):
return cobs_encode(self.build())+b'\x00'
@classmethod
def parse(cls, data):
data = bytes(data)
i = 0
path = []
rpath = []
while i < len(data) and data[i] < 0xFE:
path.append(data[i])
i += 1
if data[i] == 0xFE:
i += 1
while i < len(data) and data[i] < 0xFE:
rpath.append(data[i])
i += 1
assert data[i] == 0xFF
i += 1
ptype = data[i]
i += 1
payload = data[i:]
return cls(payload, path, rpath, ptype)
@classmethod
def parse_cobs(cls, data):
return cls.parse(cobs_decode(bytes(data)))
def __eq__(self, other):
if type(other) is XfcpFrame:
return (self.path == other.path and
self.rpath == other.rpath and
self.ptype == other.ptype and
self.payload == other.payload)
return False
def __repr__(self):
return f"XfcpFrame(payload={self.payload!r}, path={self.path!r}, rpath={self.rpath!r}, ptype={self.ptype})"

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../xfcp.py

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# SPDX-License-Identifier: MIT
"""
Copyright (c) 2017-2025 FPGA Ninja, LLC
Authors:
- Alex Forencich
"""
import struct
def cobs_encode(block):
block = bytes(block)
enc = bytearray()
seg = bytearray()
code = 1
new_data = True
for b in block:
if b == 0:
enc.append(code)
enc.extend(seg)
code = 1
seg = bytearray()
new_data = True
else:
code += 1
seg.append(b)
new_data = True
if code == 255:
enc.append(code)
enc.extend(seg)
code = 1
seg = bytearray()
new_data = False
if new_data:
enc.append(code)
enc.extend(seg)
return bytes(enc)
def cobs_decode(block):
block = bytes(block)
dec = bytearray()
code = 0
i = 0
if 0 in block:
return None
while i < len(block):
code = block[i]
i += 1
if i+code-1 > len(block):
return None
dec.extend(block[i:i+code-1])
i += code-1
if code < 255 and i < len(block):
dec.append(0)
return bytes(dec)
class XfcpFrame(object):
def __init__(self, payload=b'', path=[], rpath=[], ptype=0):
self._payload = b''
self.path = path
self.rpath = rpath
self.ptype = ptype
if type(payload) is bytes:
self.payload = payload
if type(payload) is XfcpFrame:
self.payload = payload.payload
self.path = list(payload.path)
self.rpath = list(payload.rpath)
self.ptype = payload.ptype
@property
def payload(self):
return self._payload
@payload.setter
def payload(self, value):
self._payload = bytes(value)
def build(self):
data = bytearray()
for p in self.path:
data.extend(struct.pack('B', p))
if self.rpath:
data.extend(struct.pack('B', 0xFE))
for p in self.rpath:
data.extend(struct.pack('B', p))
data.extend(struct.pack('B', 0xFF))
data.extend(struct.pack('B', self.ptype))
data.extend(self.payload)
return data
def build_cobs(self):
return cobs_encode(self.build())+b'\x00'
@classmethod
def parse(cls, data):
data = bytes(data)
i = 0
path = []
rpath = []
while i < len(data) and data[i] < 0xFE:
path.append(data[i])
i += 1
if data[i] == 0xFE:
i += 1
while i < len(data) and data[i] < 0xFE:
rpath.append(data[i])
i += 1
assert data[i] == 0xFF
i += 1
ptype = data[i]
i += 1
payload = data[i:]
return cls(payload, path, rpath, ptype)
@classmethod
def parse_cobs(cls, data):
return cls.parse(cobs_decode(bytes(data)))
def __eq__(self, other):
if type(other) is XfcpFrame:
return (self.path == other.path and
self.rpath == other.rpath and
self.ptype == other.ptype and
self.payload == other.payload)
return False
def __repr__(self):
return f"XfcpFrame(payload={self.payload!r}, path={self.path!r}, rpath={self.rpath!r}, ptype={self.ptype})"

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../xfcp.py

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# SPDX-License-Identifier: MIT
"""
Copyright (c) 2017-2025 FPGA Ninja, LLC
Authors:
- Alex Forencich
"""
import struct
def cobs_encode(block):
block = bytes(block)
enc = bytearray()
seg = bytearray()
code = 1
new_data = True
for b in block:
if b == 0:
enc.append(code)
enc.extend(seg)
code = 1
seg = bytearray()
new_data = True
else:
code += 1
seg.append(b)
new_data = True
if code == 255:
enc.append(code)
enc.extend(seg)
code = 1
seg = bytearray()
new_data = False
if new_data:
enc.append(code)
enc.extend(seg)
return bytes(enc)
def cobs_decode(block):
block = bytes(block)
dec = bytearray()
code = 0
i = 0
if 0 in block:
return None
while i < len(block):
code = block[i]
i += 1
if i+code-1 > len(block):
return None
dec.extend(block[i:i+code-1])
i += code-1
if code < 255 and i < len(block):
dec.append(0)
return bytes(dec)
class XfcpFrame(object):
def __init__(self, payload=b'', path=[], rpath=[], ptype=0):
self._payload = b''
self.path = path
self.rpath = rpath
self.ptype = ptype
if type(payload) is bytes:
self.payload = payload
if type(payload) is XfcpFrame:
self.payload = payload.payload
self.path = list(payload.path)
self.rpath = list(payload.rpath)
self.ptype = payload.ptype
@property
def payload(self):
return self._payload
@payload.setter
def payload(self, value):
self._payload = bytes(value)
def build(self):
data = bytearray()
for p in self.path:
data.extend(struct.pack('B', p))
if self.rpath:
data.extend(struct.pack('B', 0xFE))
for p in self.rpath:
data.extend(struct.pack('B', p))
data.extend(struct.pack('B', 0xFF))
data.extend(struct.pack('B', self.ptype))
data.extend(self.payload)
return data
def build_cobs(self):
return cobs_encode(self.build())+b'\x00'
@classmethod
def parse(cls, data):
data = bytes(data)
i = 0
path = []
rpath = []
while i < len(data) and data[i] < 0xFE:
path.append(data[i])
i += 1
if data[i] == 0xFE:
i += 1
while i < len(data) and data[i] < 0xFE:
rpath.append(data[i])
i += 1
assert data[i] == 0xFF
i += 1
ptype = data[i]
i += 1
payload = data[i:]
return cls(payload, path, rpath, ptype)
@classmethod
def parse_cobs(cls, data):
return cls.parse(cobs_decode(bytes(data)))
def __eq__(self, other):
if type(other) is XfcpFrame:
return (self.path == other.path and
self.rpath == other.rpath and
self.ptype == other.ptype and
self.payload == other.payload)
return False
def __repr__(self):
return f"XfcpFrame(payload={self.payload!r}, path={self.path!r}, rpath={self.rpath!r}, ptype={self.ptype})"

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../xfcp.py

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@@ -1,159 +0,0 @@
# SPDX-License-Identifier: MIT
"""
Copyright (c) 2017-2025 FPGA Ninja, LLC
Authors:
- Alex Forencich
"""
import struct
def cobs_encode(block):
block = bytes(block)
enc = bytearray()
seg = bytearray()
code = 1
new_data = True
for b in block:
if b == 0:
enc.append(code)
enc.extend(seg)
code = 1
seg = bytearray()
new_data = True
else:
code += 1
seg.append(b)
new_data = True
if code == 255:
enc.append(code)
enc.extend(seg)
code = 1
seg = bytearray()
new_data = False
if new_data:
enc.append(code)
enc.extend(seg)
return bytes(enc)
def cobs_decode(block):
block = bytes(block)
dec = bytearray()
code = 0
i = 0
if 0 in block:
return None
while i < len(block):
code = block[i]
i += 1
if i+code-1 > len(block):
return None
dec.extend(block[i:i+code-1])
i += code-1
if code < 255 and i < len(block):
dec.append(0)
return bytes(dec)
class XfcpFrame(object):
def __init__(self, payload=b'', path=[], rpath=[], ptype=0):
self._payload = b''
self.path = path
self.rpath = rpath
self.ptype = ptype
if type(payload) is bytes:
self.payload = payload
if type(payload) is XfcpFrame:
self.payload = payload.payload
self.path = list(payload.path)
self.rpath = list(payload.rpath)
self.ptype = payload.ptype
@property
def payload(self):
return self._payload
@payload.setter
def payload(self, value):
self._payload = bytes(value)
def build(self):
data = bytearray()
for p in self.path:
data.extend(struct.pack('B', p))
if self.rpath:
data.extend(struct.pack('B', 0xFE))
for p in self.rpath:
data.extend(struct.pack('B', p))
data.extend(struct.pack('B', 0xFF))
data.extend(struct.pack('B', self.ptype))
data.extend(self.payload)
return data
def build_cobs(self):
return cobs_encode(self.build())+b'\x00'
@classmethod
def parse(cls, data):
data = bytes(data)
i = 0
path = []
rpath = []
while i < len(data) and data[i] < 0xFE:
path.append(data[i])
i += 1
if data[i] == 0xFE:
i += 1
while i < len(data) and data[i] < 0xFE:
rpath.append(data[i])
i += 1
assert data[i] == 0xFF
i += 1
ptype = data[i]
i += 1
payload = data[i:]
return cls(payload, path, rpath, ptype)
@classmethod
def parse_cobs(cls, data):
return cls.parse(cobs_decode(bytes(data)))
def __eq__(self, other):
if type(other) is XfcpFrame:
return (self.path == other.path and
self.rpath == other.rpath and
self.ptype == other.ptype and
self.payload == other.payload)
return False
def __repr__(self):
return f"XfcpFrame(payload={self.payload!r}, path={self.path!r}, rpath={self.rpath!r}, ptype={self.ptype})"

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../xfcp.py