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new slac sequencer with modem autodetection works

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uhi22 2022-11-22 09:57:51 +01:00
parent 32660368f9
commit 15111915ec
1 changed files with 99 additions and 31 deletions
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110
pyPlcHomeplug.py
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@ -78,16 +78,17 @@ STATE_MODEM_SEARCH_ONGOING = 1
STATE_READY_FOR_SLAC = 2
STATE_WAITING_FOR_MODEM_RESTARTED = 3
STATE_WAITING_FOR_SLAC_PARAM_CNF = 4
STATE_BEFORE_START_ATTEN_CHAR = 5
STATE_SOUNDING = 6
STATE_WAIT_FOR_ATTEN_CHAR_IND = 7
STATE_ATTEN_CHAR_IND_RECEIVED = 8
STATE_DELAY_BEFORE_MATCH = 9
STATE_WAITING_FOR_SLAC_MATCH_CNF = 10
STATE_WAITING_FOR_RESTART2 = 11
STATE_FIND_MODEMS2 = 12
STATE_WAITING_FOR_RESTART2 = 13
STATE_SDP = 14
STATE_SLAC_PARAM_CNF_RECEIVED = 5
STATE_BEFORE_START_ATTEN_CHAR = 6
STATE_SOUNDING = 7
STATE_WAIT_FOR_ATTEN_CHAR_IND = 8
STATE_ATTEN_CHAR_IND_RECEIVED = 9
STATE_DELAY_BEFORE_MATCH = 10
STATE_WAITING_FOR_SLAC_MATCH_CNF = 11
STATE_WAITING_FOR_RESTART2 = 12
STATE_FIND_MODEMS2 = 13
STATE_WAITING_FOR_RESTART2 = 14
STATE_SDP = 15
class pyPlcHomeplug():
@ -536,15 +537,56 @@ class pyPlcHomeplug():
self.sniffer.sendpacket(bytes(pkt))
def evaluateGetKeyCnf(self):
# The getkey response contains the Network ID (NID), even if the request was rejected. We store the NID,
# to have it available for the next request.
self.addToTrace("received GET_KEY.CNF")
self.numberOfFoundModems += 1
sourceMac=bytearray(6)
for i in range(0, 6):
sourceMac[i] = self.myreceivebuffer[6+i]
strMac=prettyMac(sourceMac)
result = self.myreceivebuffer[19] # 0 in case of success
if (result==0):
strResult="(OK)"
else:
strResult="(NOK)"
self.addToTrace("Modem #" + str(self.numberOfFoundModems) + " has " + strMac + " and result code is " + str(result) + strResult)
if (self.numberOfFoundModems>1):
self.addToTrace("Info: NOK is normal for remote modems.")
# We observed the following cases:
# (A) Result=1 (NOK), NID all 00, key all 00: We requested the key with the wrong NID.
# (B) Result=0 (OK), NID all 00, key non-zero: We used the correct NID for the request.
# It is the local TPlink adaptor. A fresh started non-coordinator, like the PEV side.
# (C) Result=0 (OK), NID non-zero, key non-zero: We used the correct NID for the request.
# It is the local TPlink adaptor.
# (D) Result=1 (NOK), NID non-zero, key all 00: It was a remote device. They are rejecting the GET_KEY.
if (result==0):
# The ok case is for sure the local modem. Let's store its data.
self.localModemMac = sourceMac
self.localModemCurrentKey=bytearray(16)
s=""
for i in range(0, 16): # NMK has 16 bytes
self.localModemCurrentKey[i] = self.myreceivebuffer[41+i]
s=s+hex(self.localModemCurrentKey[i])+ " "
self.addToTrace("The local modem has key " + s)
if (self.localModemCurrentKey == bytearray(self.NMKdevelopment)):
self.addToTrace("This is the developer NMK.")
self.isDeveloperLocalKey = 1
else:
self.addToTrace("This is NOT the developer NMK.")
self.localModemFound=1
s = ""
# The getkey response contains the Network ID (NID), even if the request was rejected. We store the NID,
# to have it available for the next request. Use case: A fresh started, unconnected non-Coordinator
# modem has the default-NID all 00. On the other hand, a fresh started coordinator has the
# NID which he was configured before. We want to be able to cover both cases. That's why we
# ask GET_KEY, it will tell the NID (even if response code is 1 (NOK), and we will use this
# received NID for the next request. This will be ansered positive (for the local modem).
for i in range(0, 7): # NID has 7 bytes
self.NID[i] = self.myreceivebuffer[29+i]
s=s+hex(self.NID[i])+ " "
print("From GetKeyCnf, got network ID (NID) " + s)
def evaluateSetKeyCnf(self):
# The Setkey confirmation
# In spec, the result 0 means "success". But in reality, the 0 means: did not work. When it works,
@ -552,7 +594,7 @@ class pyPlcHomeplug():
self.addToTrace("received SET_KEY.CNF")
result = self.myreceivebuffer[19]
if (result == 0):
self.addToTrace("SetKeyCnf says 0, this is a bad sign")
self.addToTrace("SetKeyCnf says 0, this would be a bad sign for local modem, but normal for remote.")
else:
self.addToTrace("SetKeyCnf says " + str(result) + ", this is formally 'rejected', but indeed ok.")
@ -595,7 +637,7 @@ class pyPlcHomeplug():
if (self.iAmPev==1):
if (self.pevSequenceState==STATE_WAITING_FOR_SLAC_PARAM_CNF): # we were waiting for the SlacParamCnf
self.pevSequenceDelayCycles = 4 # original Ioniq is waiting 200ms
self.enterState(self.pevSequenceState+1) # enter next state. Will be handled in the cyclic runPevSequencer
self.enterState(STATE_SLAC_PARAM_CNF_RECEIVED) # enter next state. Will be handled in the cyclic runPevSequencer
def evaluateMnbcSoundInd(self):
# We received MNBC_SOUND.IND from the PEV. Normally this happens 10times, with a countdown (remaining number of sounds)
@ -689,7 +731,8 @@ class pyPlcHomeplug():
self.evaluateGetSwCnf()
def isEvseModemFound(self):
return 0 # todo: look whether the MAC of the EVSE modem is in the list of detected modems
#return 0 # todo: look whether the MAC of the EVSE modem is in the list of detected modems
return self.numberOfFoundModems>1
def enterState(self, n):
print("[PEVSLAC] from " + str(self.pevSequenceState) + " entering " + str(n))
@ -708,6 +751,8 @@ class pyPlcHomeplug():
self.isSimulationMode = 0
self.isSDPDone = 0
self.numberOfFoundModems = 0
self.localModemFound = 0
self.isDeveloperLocalKey = 0
self.nEvseModemMissingCounter = 0
# First action: find the connected homeplug modems, by sending a GET_KEY
self.composeGetKey()
@ -727,11 +772,12 @@ class pyPlcHomeplug():
self.enterState(STATE_READY_FOR_SLAC)
return
else:
if (self.localModemFound):
# we have at least a local modem. Maybe more remote.
# We want to make sure, that the local modem is set to the "default key", so that
# it is possible to connect to the PLC network for development purposes.
# That's why we check the key, and if it is not the intended, we set the default.
if (self.isDefaultLocalKey):
if (self.isDeveloperLocalKey):
self.enterState(STATE_READY_FOR_SLAC)
return
else:
@ -740,6 +786,19 @@ class pyPlcHomeplug():
self.transmit(self.mytransmitbuffer)
self.enterState(STATE_WAITING_FOR_MODEM_RESTARTED)
return
else:
# we found modems, but non of it could be identified as the local modem. This happens
# when we do not use the matching NID for the request. We try again, because in the
# first response we got a better NID in the meanwhile.
self.addToTrace("[PEVSLAC] local modem not yet identified.")
self.numberOfFoundModems = 0
# find the connected homeplug modems, by sending a GET_KEY
self.composeGetKey()
self.addToTrace("[PEVSLAC] searching for modems, transmitting GET_KEY.REQ...")
self.transmit(self.mytransmitbuffer)
self.enterState(STATE_MODEM_SEARCH_ONGOING)
return
return
if (self.pevSequenceState==STATE_WAITING_FOR_MODEM_RESTARTED): # Waiting for the modem to restart after SetKey.
if (self.pevSequenceCyclesInState>=100):
@ -753,15 +812,18 @@ class pyPlcHomeplug():
self.enterState(STATE_WAITING_FOR_SLAC_PARAM_CNF)
return
if (self.pevSequenceState==STATE_WAITING_FOR_SLAC_PARAM_CNF): # Waiting for slac_param confirmation.
self.pevSequenceDelayCycles = 6 # 6*30=180ms as preparation for the next state.
# Between the SLAC_PARAM.CNF and the first START_ATTEN_CHAR.IND the Ioniq waits 200ms.
self.nRemainingStartAttenChar = 3 # There shall be 3 START_ATTEN_CHAR messages.
if (self.pevSequenceCyclesInState>=30):
# No response for 1s, this is an error.
self.addToTrace("[PEVSLAC] Timeout while waiting for SLAC_PARAM.CNF")
self.enterState(STATE_INITIAL)
# (the normal state transition is done in the reception handler)
return
if (self.pevSequenceState==STATE_SLAC_PARAM_CNF_RECEIVED): # slac_param confirmation was received.
self.pevSequenceDelayCycles = 6 # 6*30=180ms as preparation for the next state.
# Between the SLAC_PARAM.CNF and the first START_ATTEN_CHAR.IND the Ioniq waits 200ms.
self.nRemainingStartAttenChar = 3 # There shall be 3 START_ATTEN_CHAR messages.
self.enterState(STATE_BEFORE_START_ATTEN_CHAR)
return
if (self.pevSequenceState==STATE_BEFORE_START_ATTEN_CHAR): # received SLAC_PARAM.CNF. Multiple transmissions of START_ATTEN_CHAR.
if (self.pevSequenceDelayCycles>0):
self.pevSequenceDelayCycles-=1
@ -831,6 +893,7 @@ class pyPlcHomeplug():
self.pevSequenceDelayCycles-=1
return
self.addToTrace("[PEVSLAC] Checking whether the pairing worked, by GET_KEY.REQ...")
self.numberOfFoundModems = 0 # reset the number, we want to count the modems newly.
self.composeGetKey()
self.transmit(self.mytransmitbuffer)
self.enterState(STATE_FIND_MODEMS2)
@ -838,9 +901,11 @@ class pyPlcHomeplug():
if (self.pevSequenceState==STATE_FIND_MODEMS2): # Waiting for the modems to answer.
if (self.pevSequenceCyclesInState>=10):
# It was sufficient time to get the answers from the modems.
self.addToTrace("[PEVSLAC] It was sufficient time to get the answers from the modems.")
# Let's see what we received.
if (not self.isEvseModemFound()):
if ((not self.isEvseModemFound()) and (not self.isSimulationMode)):
self.nEvseModemMissingCounter+=1
self.addToTrace("[PEVSLAC] No EVSE seen (yet). Still waiting for it.")
if (self.nEvseModemMissingCounter>5):
if (self.isSimulationMode):
self.addToTrace("[PEVSLAC] No EVSE modem. But this is fine, we are in SimulationMode.")
@ -854,6 +919,7 @@ class pyPlcHomeplug():
self.enterState(STATE_WAITING_FOR_RESTART2)
return
# The EVSE modem is present.
self.addToTrace("[PEVSLAC] EVSE is up, pairing successful.")
self.nEvseModemMissingCounter=0
# The AVLN is established, we have at least two modems in the network.
# If we did not SDP up to now, let's do it.
@ -865,6 +931,7 @@ class pyPlcHomeplug():
self.enterState(STATE_WAITING_FOR_RESTART2)
return
# SDP was not done yet. Now we start it.
self.addToTrace("[PEVSLAC] SDP was not done yet. Now we start it.")
# Next step is to discover the chargers communication controller (SECC) using discovery protocol (SDP).
self.pevSequenceDelayCycles=0
self.SdpRepetitionCounter = 50 # prepare the number of retries for the SDP. The more the better.
@ -957,7 +1024,8 @@ class pyPlcHomeplug():
self.findEthernetAdaptor()
self.sniffer = pcap.pcap(name=self.strInterfaceName, promisc=True, immediate=True, timeout_ms=50)
self.sniffer.setnonblock(True)
self.NMK = [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 ] # a default network key
self.NMKdevelopment = [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 ] # a default network key
self.NMK = self.NMKdevelopment # a default network key
self.NID = [ 1, 2, 3, 4, 5, 6, 7 ] # a default network ID
self.pevMac = [0xDC, 0x0E, 0xA1, 0x11, 0x67, 0x08 ] # a default pev MAC. Will be overwritten later.
self.evseMac = [0x55, 0x56, 0x57, 0xAA, 0xAA, 0xAA ] # a default evse MAC. Will be overwritten later.