def driver_init(self):
yield WaitWriteOnly()
self.intf.en.write(self._enabled)
def monitor(self):
"""
Collect data from interface
If onMonitorReady is present run it before setting ready and before data is read from the channel
"""
start = self.sim.now
yield WaitCombRead()
if not self._enabled:
return
if self.notReset():
yield WaitWriteOnly()
if not self._enabled:
return
if self._readyComnsummed:
# try to run onMonitorReady if there is any to preset value on signals potentially
# going against main data flow of this channel
onMonitorReady = getattr(self, "onMonitorReady", None)
if onMonitorReady is not None:
onMonitorReady()
self._readyComnsummed = False
# update rd signal only if required
if self._lastRd != 1:
self.set_ready(1)
self._lastRd = 1
else:
yield WaitCombRead()
assert int(self.get_ready()) == self._lastRd, (
"Something changed the value of ready without notifying this agent"
" which is responsible for this", self.sim.now,
self.get_ready(), self._lastRd)
if not self._enabled:
return
# wait for response of master
yield WaitCombStable()
if not self._enabled:
return
vld = self.get_valid()
try:
vld = int(vld)
except ValueError:
raise AssertionError(self.sim.now, self.intf,
"vld signal is in invalid state")
if vld:
# master responded with positive ack, do read data
d = self.get_data()
if self._debugOutput is not None:
name = self.intf._getFullName()
self._debugOutput.write(
f"{name:s}, read, {self.sim.now:d}: {d}\n")
self.data.append(d)
if self._afterRead is not None:
self._afterRead()
# data was read from th channel next ready bellongs to a different data chunk
self._readyComnsummed = True
else:
self._readyComnsummed = True
if self._lastRd != 0:
yield WaitWriteOnly()
# can not receive, say it to masters
self.set_ready(0)
self._lastRd = 0
else:
assert int(self.get_ready()) == self._lastRd
assert start == self.sim.now
def data_feed():
for d in test_data:
yield WaitWriteOnly()
io.inp.write(d)
yield Timer(CLK_PERIOD)
def driver(self):
"""
Push data to interface
set vld high and wait on rd in high then pass new data
"""
start = self.sim.now
yield WaitWriteOnly()
if not self._enabled:
return
# pop new data if there are not any pending
if self.actualData is NOP and self.data:
self.actualData = self.data.popleft()
doSend = self.actualData is not NOP
# update data on signals if is required
if self.actualData is not self._lastWritten:
if doSend:
data = self.actualData
else:
data = None
self.set_data(data)
self._lastWritten = self.actualData
yield WaitCombRead()
if not self._enabled:
return
en = self.notReset()
vld = int(en and doSend)
if self._lastVld is not vld:
yield WaitWriteOnly()
self.set_valid(vld)
self._lastVld = vld
if not self._enabled:
# we can not check rd it in this function because we can not wait
# because we can be reactivated in this same time
yield self.checkIfRdWillBeValid()
return
# wait for response of slave
yield WaitCombStable()
if not self._enabled:
return
rd = self.get_ready()
try:
rd = int(rd)
except ValueError:
raise AssertionError(self.sim.now, self.intf,
"rd signal in invalid state") from None
if not vld:
assert start == self.sim.now
return
if rd:
# slave did read data, take new one
if self._debugOutput is not None:
name = self.intf._getFullName()
self._debugOutput.write(
f"{name:s}, wrote, {self.sim.now:d}: {self.actualData}\n")
a = self.actualData
# pop new data, because actual was read by slave
if self.data:
self.actualData = self.data.popleft()
else:
self.actualData = NOP
# try to run onDriverWriteAck if there is any
onDriverWriteAck = getattr(self, "onDriverWriteAck", None)
if onDriverWriteAck is not None:
onDriverWriteAck()
onDone = getattr(a, "onDone", None)
if onDone is not None:
onDone()
assert start == self.sim.now