def compare(self, got, exp, log, strict_type=True):
"""
Common function for comparing two transactions.
Can be re-implemented by a subclass.
"""
# Compare the types
if strict_type and type(got) != type(exp):
self.errors += 1
log.error("Received transaction is a different type to expected "
"transaction")
log.info("Got: %s but expected %s" %
(str(type(got)), str(type(exp))))
if self._imm:
raise TestFailure("Received transaction of wrong type")
return
# Or convert to a string before comparison
elif not strict_type:
got, exp = str(got), str(exp)
# Compare directly
if got != exp:
self.errors += 1
# Try our best to print out something useful
strgot, strexp = str(got), str(exp)
log.error("Received transaction differed from expected output")
log.info("Expected:\n" + hexdump(strexp))
if not isinstance(exp, str):
try:
for word in exp:
log.info(str(word))
except:
pass
log.info("Received:\n" + hexdump(strgot))
if not isinstance(got, str):
try:
for word in got:
log.info(str(word))
except:
pass
log.warning("Difference:\n%s" % hexdiffs(strexp, strgot))
if self._imm:
raise TestFailure("Received transaction differed from expected"
"transaction")
else:
# Don't want to fail the test
# if we're passed something without __len__
try:
log.debug("Received expected transaction %d bytes" %
(len(got)))
log.debug(repr(got))
except:
pass
def compare(self, got, exp, log, strict_type=True):
"""
Common function for comparing two transactions.
Can be re-implemented by a subclass.
"""
# Compare the types
if strict_type and type(got) != type(exp):
self.errors += 1
log.error("Received transaction is a different type to expected "
"transaction")
log.info("Got: %s but expected %s" %
(str(type(got)), str(type(exp))))
if self._imm:
raise TestFailure("Received transaction of wrong type")
return
# Or convert to a string before comparison
elif not strict_type:
got, exp = str(got), str(exp)
# Compare directly
if got != exp:
self.errors += 1
# Try our best to print out something useful
strgot, strexp = str(got), str(exp)
log.error("Received transaction differed from expected output")
log.info("Expected:\n" + hexdump(strexp))
if not isinstance(exp, str):
try:
for word in exp:
log.info(str(word))
except:
pass
log.info("Received:\n" + hexdump(strgot))
if not isinstance(got, str):
try:
for word in got:
log.info(str(word))
except:
pass
log.warning("Difference:\n%s" % hexdiffs(strexp, strgot))
if self._imm:
raise TestFailure("Received transaction differed from expected"
"transaction")
else:
# Don't want to fail the test
# if we're passed something without __len__
try:
log.debug("Received expected transaction %d bytes" %
(len(got)))
log.debug(repr(got))
except:
pass
def _monitor_recv(self):
clk = RisingEdge(self.clock)
self._pkt = ""
while True:
yield clk
ctrl, bytes = self._get_bytes()
if ctrl[0] and bytes[0] == _XGMII_START:
ctrl, bytes = ctrl[1:], bytes[1:]
while self._add_payload(ctrl, bytes):
yield clk
ctrl, bytes = self._get_bytes()
if self._pkt:
self.log.debug("Received:\n%s" % (hexdump(self._pkt)))
if len(self._pkt) < 64 + 7:
self.log.error("Received a runt frame!")
if len(self._pkt) < 12:
self.log.error("No data to extract")
self._pkt = ""
continue
preamble_sfd = self._pkt[0:7]
crc32 = self._pkt[-4:]
payload = self._pkt[7:-4]
if preamble_sfd != _PREAMBLE_SFD:
self.log.error("Got a frame with unknown preamble/SFD")
self.log.error(hexdump(preamble_sfd))
self._pkt = ""
continue
expected_crc = struct.pack("<I",
(zlib.crc32(payload) & 0xFFFFFFFF))
if crc32 != expected_crc:
self.log.error("Incorrect CRC on received packet")
self.log.info("Expected: %s" % (hexdump(expected_crc)))
self.log.info("Received: %s" % (hexdump(crc32)))
# Use scapy to decode the packet
if _have_scapy:
p = Ether(payload)
self.log.debug("Received decoded packet:\n%s" % p.show2())
else:
p = payload
self._recv(p)
self._pkt = ""
def _monitor_recv(self):
clk = RisingEdge(self.clock)
self._pkt = ""
while True:
yield clk
ctrl, bytes = self._get_bytes()
if ctrl[0] and bytes[0] == _XGMII_START:
ctrl, bytes = ctrl[1:], bytes[1:]
while self._add_payload(ctrl, bytes):
yield clk
ctrl, bytes = self._get_bytes()
if self._pkt:
self.log.debug("Received:\n%s" % (hexdump(self._pkt)))
if len(self._pkt) < 64 + 7:
self.log.error("Received a runt frame!")
if len(self._pkt) < 12:
self.log.error("No data to extract")
self._pkt = ""
continue
preamble_sfd = self._pkt[0:7]
crc32 = self._pkt[-4:]
payload = self._pkt[7:-4]
if preamble_sfd != _PREAMBLE_SFD:
self.log.error("Got a frame with unknown preamble/SFD")
self.log.error(hexdump(preamble_sfd))
self._pkt = ""
continue
expected_crc = struct.pack("<I",
(zlib.crc32(payload) & 0xFFFFFFFF))
if crc32 != expected_crc:
self.log.error("Incorrect CRC on received packet")
self.log.info("Expected: %s" % (hexdump(expected_crc)))
self.log.info("Received: %s" % (hexdump(crc32)))
# Use scapy to decode the packet
if _have_scapy:
p = Ether(payload)
self.log.debug("Received decoded packet:\n%s" % p.show2())
else:
p = payload
self._recv(p)
self._pkt = ""
def result(self):
"""Determine the test result, do we have any pending data remaining?
Returns:
:any:`TestFailure`: If not all expected output was received or
error were recorded during the test.
"""
fail = False
for monitor, expected_output in self.expected.items():
if callable(expected_output):
self.log.debug("Can't check all data returned for %s since "
"expected output is callable function rather "
"than a list" % str(monitor))
continue
if len(expected_output):
self.log.warn("Still expecting %d transactions on %s" %
(len(expected_output), str(monitor)))
for index, transaction in enumerate(expected_output):
self.log.info("Expecting %d:\n%s" %
(index, hexdump(str(transaction))))
if index > 5:
self.log.info("... and %d more to come" %
(len(expected_output) - index - 1))
break
fail = True
if fail:
return TestFailure("Not all expected output was received")
if self.errors:
return TestFailure("Errors were recorded during the test")
return TestSuccess()
def check_received_transaction(transaction):
"""Called back by the monitor when a new transaction has been
received"""
log = logging.getLogger(self.log.name + '.' + monitor.name)
if callable(expected_output):
exp = expected_output(transaction)
elif len(expected_output):
for i in range(min((reorder_depth + 1), len(expected_output))):
if expected_output[i] == transaction:
break
else:
i = 0
exp = expected_output.pop(i)
else:
self.errors += 1
log.error("Received a transaction but wasn't expecting "
"anything")
log.info("Got: %s" % (hexdump(str(transaction))))
if self._imm:
raise TestFailure("Received a transaction but wasn't "
"expecting anything")
return
self.compare(transaction, exp, log, strict_type=strict_type)
async def _driver_send(self,
pkt: Union[bytes, Iterable],
sync: bool = True,
channel: Optional[int] = None):
"""Send a packet over the bus.
Args:
pkt: Packet to drive onto the bus.
channel: Channel attributed to the packet.
If ``pkt`` is a string, we simply send it word by word
If ``pkt`` is an iterable, it's assumed to yield objects with
attributes matching the signal names.
"""
# Avoid spurious object creation by recycling
if isinstance(pkt, bytes):
self.log.debug("Sending packet of length %d bytes", len(pkt))
self.log.debug(hexdump(pkt))
await self._send_string(pkt, sync=sync, channel=channel)
self.log.debug("Successfully sent packet of length %d bytes",
len(pkt))
elif isinstance(pkt, str):
raise TypeError("pkt must be a bytestring, not a unicode string")
else:
if channel is not None:
self.log.warning(
"%s is ignoring channel=%d because pkt is an iterable",
self.name, channel)
await self._send_iterable(pkt, sync=sync)
def result(self):
"""Determine the test result, do we have any pending data remaining?"""
fail = False
for monitor, expected_output in self.expected.items():
if callable(expected_output):
self.log.debug("Can't check all data returned for %s since "
"expected output is callable function rather "
"than a list" % str(monitor))
continue
if len(expected_output):
self.log.warn("Still expecting %d transactions on %s" %
(len(expected_output), str(monitor)))
for index, transaction in enumerate(expected_output):
self.log.info("Expecting %d:\n%s" %
(index, hexdump(str(transaction))))
if index > 5:
self.log.info("... and %d more to come" %
(len(expected_output) - index - 1))
break
fail = True
if fail:
return TestFailure("Not all expected output was received")
if self.errors:
return TestFailure("Errors were recorded during the test")
return TestSuccess()
def check_received_transaction(transaction):
"""Called back by the monitor when a new transaction has been
received"""
if monitor.name:
log_name = self.log.name + '.' + monitor.name
else:
log_name = self.log.name + '.' + monitor.__class__.__name__
log = logging.getLogger(log_name)
if callable(expected_output):
exp = expected_output(transaction)
elif len(expected_output):
for i in range(min((reorder_depth + 1), len(expected_output))):
if expected_output[i] == transaction:
break
else:
i = 0
exp = expected_output.pop(i)
else:
self.errors += 1
log.error("Received a transaction but wasn't expecting "
"anything")
log.info("Got: %s" % (hexdump(str(transaction))))
if self._imm:
raise TestFailure("Received a transaction but wasn't "
"expecting anything")
return
self.compare(transaction, exp, log, strict_type=strict_type)
def _driver_send(self, pkt, sync=True, channel=None):
"""Send a packet over the bus.
Args:
pkt (str or iterable): Packet to drive onto the bus.
channel (None or int): Channel attributed to the packet.
If ``pkt`` is a string, we simply send it word by word
If ``pkt`` is an iterable, it's assumed to yield objects with
attributes matching the signal names.
"""
# Avoid spurious object creation by recycling
if isinstance(pkt, str):
self.log.debug("Sending packet of length %d bytes", len(pkt))
self.log.debug(hexdump(pkt))
yield self._send_string(pkt, sync=sync, channel=channel)
self.log.debug("Successfully sent packet of length %d bytes",
len(pkt))
else:
if channel is not None:
self.log.warning(
"%s is ignoring channel=%d because pkt is an iterable",
self.name, channel)
yield self._send_iterable(pkt, sync=sync)
def check_received_transaction(transaction):
"""Called back by the monitor when a new transaction has been
received."""
if monitor.name:
log_name = self.log.name + '.' + monitor.name
else:
log_name = self.log.name + '.' + type(monitor).__qualname__
log = logging.getLogger(log_name)
if callable(expected_output):
exp = expected_output(transaction)
elif len(expected_output): # we expect something
for i in range(min((reorder_depth + 1), len(expected_output))):
if expected_output[i] == transaction:
break # break out of enclosing for loop
else: # run when for loop is exhausted (but no break occurs)
i = 0
exp = expected_output.pop(i)
else:
self.errors += 1
log.error("Received a transaction but wasn't expecting "
"anything")
log.info("Got: %s" % (hexdump(str(transaction))))
if self._imm:
raise TestFailure("Received a transaction but wasn't "
"expecting anything")
return
self.compare(transaction, exp, log, strict_type=strict_type)
def _monitor_recv(self):
"""Watch the pins and reconstruct transactions"""
# Avoid spurious object creation by recycling
clkedge = RisingEdge(self.clock)
rdonly = ReadOnly()
pkt = ""
in_pkt = False
invalid_cyclecount = 0
def valid():
if hasattr(self.bus, 'ready'):
return self.bus.valid.value and self.bus.ready.value
return self.bus.valid.value
while True:
yield clkedge
yield rdonly
if self.in_reset:
continue
if valid():
invalid_cyclecount = 0
if self.bus.startofpacket.value:
if pkt:
raise AvalonProtocolError(
"Duplicate start-of-packet received on %s" % (
str(self.bus.startofpacket)))
pkt = ""
in_pkt = True
if not in_pkt:
raise AvalonProtocolError("Data transfer outside of "
"packet")
vec = self.bus.data.value
vec.big_endian = self.config['firstSymbolInHighOrderBits']
pkt += vec.buff
if self.bus.endofpacket.value:
# Truncate the empty bits
if (self.config["useEmpty"] and
self.bus.empty.value.integer):
pkt = pkt[:-self.bus.empty.value.integer]
self.log.info("Received a packet of %d bytes" % len(pkt))
self.log.debug(hexdump(str((pkt))))
self._recv(pkt)
pkt = ""
in_pkt = False
else :
if in_pkt :
invalid_cyclecount += 1
if self.config["invalidTimeout"] :
if invalid_cyclecount >= self.config["invalidTimeout"] :
raise AvalonProtocolError(
"In-Packet Timeout. Didn't receive any valid data for %d cycles!" %
invalid_cyclecount)
def check_received_transaction(transaction):
"""Called back by the monitor when a new transaction has been received"""
log = logging.getLogger(self.log.name + '.' + monitor.name)
if callable(expected_output):
exp = expected_output(transaction)
elif len(expected_output):
exp = expected_output.pop(0)
else:
self.errors += 1
log.error("Received a transaction but wasn't expecting anything")
log.info("Got: %s" % (hexdump(str(transaction))))
if self._imm: raise TestFailure("Received a transaction but wasn't expecting anything")
return
if type(transaction) != type(exp):
self.errors += 1
log.error("Received transaction is a different type to expected transaction")
log.info("Got: %s but expected %s" % (str(type(transaction)), str(type(exp))))
if self._imm: raise TestFailure("Received transaction of wrong type")
return
if transaction != exp:
self.errors += 1
log.error("Received transaction differed from expected output")
log.info("Expected:\n" + hexdump(exp))
if not isinstance(exp, str):
try:
for word in exp: self.log.info(str(word))
except: pass
log.info("Received:\n" + hexdump(transaction))
if not isinstance(transaction, str):
try:
for word in transaction: self.log.info(str(word))
except: pass
log.warning("Difference:\n%s" % hexdiffs(exp, transaction))
if self._imm: raise TestFailure("Received transaction differed from expected transaction")
else:
# Don't want to fail the test if we're passed something without __len__
try:
log.debug("Received expected transaction %d bytes" % (len(transaction)))
log.debug(repr(transaction))
except: pass
async def _driver_send(self, pkt: bytes, sync: bool = True) -> None:
"""Send a packet over the bus.
Args:
pkt: The Ethernet packet to drive onto the bus.
"""
pkt = self.layer1(bytes(pkt))
self.log.debug("Sending packet of length %d bytes" % len(pkt))
self.log.debug(hexdump(pkt))
clkedge = RisingEdge(self.clock)
if sync:
await clkedge
self.bus[0] = (_XGMII_START, True)
for i in range(1, len(self.bus)):
self.bus[i] = (pkt[i - 1], False)
pkt = pkt[len(self.bus) - 1:]
self.signal.value = self.bus.value
await clkedge
done = False
while pkt:
for i in range(len(self.bus)):
if i == len(pkt):
self.terminate(i)
pkt = b""
done = True
break
self.bus[i] = (pkt[i], False)
self.signal.value = self.bus.value
await clkedge
pkt = pkt[len(self.bus):]
if not done:
self.terminate(0)
self.signal.value = self.bus.value
await clkedge
self.idle()
await clkedge
self.log.debug("Successfully sent packet")
def _driver_send(self, pkt, sync=True):
"""Send a packet over the bus
Args:
pkt (str): Ethernet packet to drive onto the bus
"""
pkt = self.layer1(str(pkt))
self.log.debug("Sending packet of length %d bytes" % len(pkt))
self.log.debug(hexdump(pkt))
clkedge = RisingEdge(self.clock)
if sync:
yield clkedge
self.bus[0] = (_XGMII_START, True)
for i in range(1, len(self.bus)):
self.bus[i] = (pkt[i - 1], False)
pkt = pkt[len(self.bus) - 1 :]
self.signal <= self.bus.value
yield clkedge
done = False
while pkt:
for i in range(len(self.bus)):
if i == len(pkt):
self.terminate(i)
pkt = ""
done = True
break
self.bus[i] = (pkt[i], False)
self.signal <= self.bus.value
yield clkedge
pkt = pkt[len(self.bus) :]
if not done:
self.terminate(0)
self.signal <= self.bus.value
yield clkedge
self.idle()
yield clkedge
self.log.debug("Successfully sent packet")
def _driver_send(self, pkt, sync=True):
"""Send a packet over the bus
Args:
pkt (str): Ethernet packet to drive onto the bus
"""
pkt = self.layer1(str(pkt))
self.log.debug("Sending packet of length %d bytes" % len(pkt))
self.log.debug(hexdump(pkt))
clkedge = RisingEdge(self.clock)
if sync:
yield clkedge
self.bus[0] = (_XGMII_START, True)
for i in range(1, len(self.bus)):
self.bus[i] = (pkt[i - 1], False)
pkt = pkt[len(self.bus) - 1:]
self.signal <= self.bus.value
yield clkedge
done = False
while pkt:
for i in range(len(self.bus)):
if i == len(pkt):
self.terminate(i)
pkt = ""
done = True
break
self.bus[i] = (pkt[i], False)
self.signal <= self.bus.value
yield clkedge
pkt = pkt[len(self.bus):]
if not done:
self.terminate(0)
self.signal <= self.bus.value
yield clkedge
self.idle()
yield clkedge
self.log.debug("Successfully sent packet")
def _driver_send(self, pkt, sync=True):
"""Send a packet over the bus
Args:
pkt (str or iterable): packet to drive onto the bus
If pkt is a string, we simply send it word by word
If pkt is an iterable, it's assumed to yield objects with attributes
matching the signal names
"""
# Avoid spurious object creation by recycling
if isinstance(pkt, str):
self.log.debug("Sending packet of length %d bytes" % len(pkt))
self.log.debug(hexdump(pkt))
yield self._send_string(pkt, sync=sync)
self.log.info("Sucessfully sent packet of length %d bytes" %
len(pkt))
else:
yield self._send_iterable(pkt, sync=sync)
def _driver_send(self, pkt, sync=True):
"""Send a packet over the bus
Args:
pkt (str or iterable): packet to drive onto the bus
If pkt is a string, we simply send it word by word
If pkt is an iterable, it's assumed to yield objects with attributes
matching the signal names
"""
# Avoid spurious object creation by recycling
if isinstance(pkt, str):
self.log.debug("Sending packet of length %d bytes" % len(pkt))
self.log.debug(hexdump(pkt))
yield self._send_string(pkt, sync=sync)
self.log.info("Sucessfully sent packet of length %d bytes" % len(pkt))
else:
yield self._send_iterable(pkt, sync=sync)
def _driver_send(self, pkt, sync=True, channel=None):
"""Send a packet over the bus.
Args:
pkt (str or iterable): Packet to drive onto the bus.
channel (None or int): Channel attributed to the packet.
If ``pkt`` is a string, we simply send it word by word
If ``pkt`` is an iterable, it's assumed to yield objects with
attributes matching the signal names.
"""
# Avoid spurious object creation by recycling
if isinstance(pkt, str):
self.log.debug("Sending packet of length %d bytes" % len(pkt))
self.log.debug(hexdump(pkt))
yield self._send_string(pkt, sync=sync, channel=channel)
self.log.debug("Successfully sent packet of length %d bytes" % len(pkt))
else:
if channel is not None:
self.log.warning("%s is ignoring channel=%d because pkt is an iterable" % (self.name, channel))
yield self._send_iterable(pkt, sync=sync)
def _monitor_recv(self):
"""Watch the pins and reconstruct transactions"""
# Avoid spurious object creation by recycling
clkedge = RisingEdge(self.clock)
rdonly = ReadOnly()
pkt = ""
def valid():
if hasattr(self.bus, 'ready'):
return self.bus.valid.value and self.bus.ready.value
return self.bus.valid.value
while True:
yield clkedge
yield rdonly
if valid():
if self.bus.startofpacket.value:
if pkt:
raise AvalonProtocolError(
"Duplicate start-of-packet received on %s" % (
str(self.bus.startofpacket)))
pkt = ""
vec = self.bus.data.value
vec.big_endian = self.config['firstSymbolInHighOrderBits']
pkt += vec.buff
if self.bus.endofpacket.value:
# Truncate the empty bits
if self.bus.empty.value.integer:
pkt = pkt[:-self.bus.empty.value.integer]
self.log.info("Received a packet of %d bytes" % len(pkt))
self.log.debug(hexdump(str((pkt))))
self._recv(pkt)
pkt = ""
for x, y in zip(self._h, [a, b, c, d, e, f, g, h])]
def digest(self):
return b''.join(
[struct.pack('!L', i) for i in self._h[:self._output_size]])
def hexdigest(self):
return self.digest().hex()
def compute(self):
w = True
while w:
w = self.NextWords()
self._sha256_process()
mess = b'8U\xa3@\x9a\xb3\x94\xd2\xcb\x9a5\xa3\xd7\xba\x00\x87\xc2py\xc8\xb1M\xa5M\xb6\x94f#\xfc4\xe0\x12.\x8ey\xc6;8\x8dz|\x80\xb5\n\xcc\xb8.\xe1\x88\x08u/H\xdb9\xd1\xaen\x01QC\x91\x9b\xbd\xf1m\x9b\x8a\xb4gL\xb1+p\xd1"\x9f\x86\x9c\x92\xbb\xfb\xc7\xee\xce\xc8\xc1m\xf1\xb3\x9f\xc7\xd8\xe1\xfb\xca\x991\xae<\xda\xbf!9\x8bk(\xdb}\x82\xbb\x92}z3.\x1et\xbaC\xdd|\x91COpu\xc9'
print(mess[0:64])
sha2 = SHA256(mess)
#print(sha2.padding())
eom = False
while not eom:
w_bytes = b''.join([struct.pack('!L', w) for w in sha2.NextWords()])
if w_bytes != b'':
print(hexdump(w_bytes))
else:
eom = True
# print([struct.pack('!L', w) for w in sha2.NextWords()])
sha2.compute()
print(sha2.hexdigest())
#print([struct.pack('!Q', w) for w in sha2.NextWords()])
def model(self, transaction):
"""Model the DUT based on the input transaction."""
self.expected_output.append(transaction)
self.st_in_recovered.log.info(hexdump(transaction))
def _monitor_recv(self):
"""Watch the pins and reconstruct transactions."""
# Avoid spurious object creation by recycling
clkedge = RisingEdge(self.clock)
rdonly = ReadOnly()
pkt = ""
in_pkt = False
invalid_cyclecount = 0
channel = None
def valid():
if hasattr(self.bus, 'ready'):
return self.bus.valid.value and self.bus.ready.value
return self.bus.valid.value
while True:
yield clkedge
yield rdonly
if self.in_reset:
continue
if valid():
invalid_cyclecount = 0
if self.bus.startofpacket.value:
if pkt:
raise AvalonProtocolError(
"Duplicate start-of-packet received on %s" %
str(self.bus.startofpacket))
pkt = ""
in_pkt = True
if not in_pkt:
raise AvalonProtocolError("Data transfer outside of "
"packet")
# Handle empty and X's in empty / data
vec = BinaryValue()
if not self.bus.endofpacket.value:
vec = self.bus.data.value
else:
value = self.bus.data.value.get_binstr()
if self.config["useEmpty"] and self.bus.empty.value.integer:
empty = self.bus.empty.value.integer * self.config[
"dataBitsPerSymbol"]
if self.config["firstSymbolInHighOrderBits"]:
value = value[:-empty]
else:
value = value[empty:]
vec.assign(value)
if not vec.is_resolvable:
raise AvalonProtocolError(
"After empty masking value is still bad? "
"Had empty {:d}, got value {:s}".format(
empty, self.bus.data.value.get_binstr()))
vec.big_endian = self.config['firstSymbolInHighOrderBits']
pkt += vec.buff
if hasattr(self.bus, 'channel'):
if channel is None:
channel = self.bus.channel.value.integer
if channel > self.config["maxChannel"]:
raise AvalonProtocolError(
"Channel value (%d) is greater than maxChannel (%d)"
% (channel, self.config["maxChannel"]))
elif self.bus.channel.value.integer != channel:
raise AvalonProtocolError(
"Channel value changed during packet")
if self.bus.endofpacket.value:
self.log.info("Received a packet of %d bytes", len(pkt))
self.log.debug(hexdump(str((pkt))))
self.channel = channel
if self.report_channel:
self._recv({"data": pkt, "channel": channel})
else:
self._recv(pkt)
pkt = ""
in_pkt = False
channel = None
else:
if in_pkt:
invalid_cyclecount += 1
if self.config["invalidTimeout"]:
if invalid_cyclecount >= self.config["invalidTimeout"]:
raise AvalonProtocolError(
"In-Packet Timeout. Didn't receive any valid data for %d cycles!"
% invalid_cyclecount)
def _monitor_recv(self):
"""Watch the pins and reconstruct transactions."""
# Avoid spurious object creation by recycling
clkedge = RisingEdge(self.clock)
rdonly = ReadOnly()
pkt = ""
in_pkt = False
invalid_cyclecount = 0
channel = None
def valid():
if hasattr(self.bus, 'ready'):
return self.bus.valid.value and self.bus.ready.value
return self.bus.valid.value
while True:
yield clkedge
yield rdonly
if self.in_reset:
continue
if valid():
invalid_cyclecount = 0
if self.bus.startofpacket.value:
if pkt and self.config['fail_immediately']:
raise AvalonProtocolError(
"Duplicate start-of-packet received on %s" % (
str(self.bus.startofpacket)))
pkt = ""
in_pkt = True
if not in_pkt and self.config['fail_immediately']:
raise AvalonProtocolError("Data transfer outside of "
"packet")
# Handle empty and X's in empty / data
vec = BinaryValue()
if not self.bus.endofpacket.value:
vec = self.bus.data.value
else:
value = self.bus.data.value.get_binstr()
if self.config["useEmpty"] and self.bus.empty.value.integer:
empty = self.bus.empty.value.integer * self.config["dataBitsPerSymbol"]
if self.config["firstSymbolInHighOrderBits"]:
value = value[:-empty]
else:
value = value[empty:]
vec.assign(value)
if not vec.is_resolvable:
raise AvalonProtocolError("After empty masking value is still bad? Had empty {:d}, got value {:s}".format(empty, self.bus.data.value.get_binstr()))
vec.big_endian = self.config['firstSymbolInHighOrderBits']
pkt += vec.buff
if hasattr(self.bus, 'channel'):
if channel is None:
channel = self.bus.channel.value.integer
if channel > self.config["maxChannel"]:
raise AvalonProtocolError("Channel value (%d) is greater than maxChannel (%d)" % (channel,self.config["maxChannel"]))
elif self.bus.channel.value.integer != channel:
raise AvalonProtocolError("Channel value changed during packet")
if self.bus.endofpacket.value:
self.log.info("Received a packet of %d bytes" % len(pkt))
self.log.debug(hexdump(str((pkt))))
self.channel = channel
self._recv(pkt)
pkt = ""
in_pkt = False
channel = None
else :
if in_pkt :
invalid_cyclecount += 1
if self.config["invalidTimeout"] :
if invalid_cyclecount >= self.config["invalidTimeout"] :
raise AvalonProtocolError(
"In-Packet Timeout. Didn't receive any valid data for %d cycles!" %
invalid_cyclecount)
def compare(self, got, exp, log, strict_type=True):
"""Common function for comparing two transactions.
Can be re-implemented by a sub-class.
Args:
got: The received transaction.
exp: The expected transaction.
log: The logger for reporting messages.
strict_type (bool, optional): Require transaction type to match
exactly if ``True``, otherwise compare its string representation.
Raises:
:any:`TestFailure`: If received transaction differed from
expected transaction when :attr:`fail_immediately` is ``True``.
If *strict_type* is ``True``,
also the transaction type must match.
"""
# Compare the types
if strict_type and type(got) != type(exp):
self.errors += 1
log.error("Received transaction type is different than expected")
log.info("Received: %s but expected %s" %
(str(type(got)), str(type(exp))))
if self._imm:
raise TestFailure("Received transaction of wrong type. "
"Set strict_type=False to avoid this.")
return
# Or convert to a string before comparison
elif not strict_type:
got, exp = str(got), str(exp)
# Compare directly
if got != exp:
self.errors += 1
# Try our best to print out something useful
strgot, strexp = str(got), str(exp)
log.error("Received transaction differed from expected output")
if not strict_type:
log.info("Expected:\n" + hexdump(strexp))
else:
log.info("Expected:\n" + repr(exp))
if not isinstance(exp, str):
try:
for word in exp:
log.info(str(word))
except Exception:
pass
if not strict_type:
log.info("Received:\n" + hexdump(strgot))
else:
log.info("Received:\n" + repr(got))
if not isinstance(got, str):
try:
for word in got:
log.info(str(word))
except Exception:
pass
log.warning("Difference:\n%s" % hexdiffs(strexp, strgot))
if self._imm:
raise TestFailure(
"Received transaction differed from expected "
"transaction")
else:
# Don't want to fail the test
# if we're passed something without __len__
try:
log.debug("Received expected transaction %d bytes" %
(len(got)))
log.debug(repr(got))
except Exception:
pass
