toprint=toprint+("%02x "%ord(bar))
return toprint;
- def packet2parsed(self,data):
+
+ ## This code could be drastica
+ def packet2parsedstr(self,data):
dp1 = ord(data[0])
dp2 = ord(data[1])
dp5 = ord(data[4])
#converts the CAN message to a string
msg="";
- for bar in data:
- msg=msg+("%02x"%ord(bar))
- packet = {'msg':msg}
+
#get the ide bit. allows us to check to see if we have an extended
#frame
- packet['ide'] = (dp2 & 0x0f)>>3
+ ide = (dp2 & 0x0f)>>3
#we have an extended frame
- if( packet['ide'] != 0):
+ if( ide != 0):
#get lower nibble, last 2 bits
eId = dp2 & 0x03
eId = eId<<8 | ord(data[2])
- packet['eID'] = eId<<8 | ord(data[3])
- packet['rtr'] = dp5>>6 & 0x01
+ eId = eId<<8 | ord(data[3])
+ rtr = dp5>>6 & 0x01
+ eIDmsg = " eID: %06d" %(eId)
+ rtrmsg = " rtr: %d" % (rtr)
else:
- packet['rtr'] = dp2>>4 & 0x01
-
- #error check, 2nd msb of the lower nibble of byte 2 should be 0
- if( (dp2 & 0x04) == 4 ):
- packet['error'] = 1
- #error check an always 0 bit
- if( (dp5 & 0xf0) == 240):
- packet['error'] = 1
+ rtr = dp2>>4 & 0x01
+ eIDmsg = ""
+ rtrmsg = " rtr: %d"%(rtr)
# Create the standard ID. from the message
- packet['sID'] = dp1<<3 | dp2>>5
-
-
+ sID = dp1<<3 | dp2>>5
length = dp5 & 0x0f
- packet['length'] = length
-
- if( length > 8):
- packet['error'] = 1
#generate the data section
+ dbmsg = ""
for i in range(0,length):
- idx = 5+i
- dbidx = 'db%d' % i
- packet[dbidx] = data[idx]
- return packet
+ dbmsg += data[idx]
+ msg = "sID: %04d" + eIDmsg + rtrmsg + ("length: %d"%(length)) + dbmsg
+
+ return msg
def peek8(self,adr):
if( verbose==True):
#if we want to print a parsed message
if( parsed == True):
- packetParsed = self.client.packet2parsed(packet)
- sId = packetParsed.get('sID')
- msg = "sID: %04d" %sId
- if( packetParsed.get('eID')):
- msg += " eID: %d" %packetParsed.get('eID')
- msg += " rtr: %d"%packetParsed['rtr']
- length = packetParsed['length']
- msg += " length: %d"%length
- msg += " data:"
- for i in range(0,length):
- dbidx = 'db%d'%i
- msg +=" %03d"% ord(packetParsed[dbidx])
+# packetParsed = self.client.packet2parsed(packet)
+# sId = packetParsed.get('sID')
+# msg = "sID: %04d" %sId
+# if( packetParsed.get('eID')):
+# msg += " eID: %d" %packetParsed.get('eID')
+# msg += " rtr: %d"%packetParsed['rtr']
+# length = packetParsed['length']
+# msg += " length: %d"%length
+# msg += " data:"
+# for i in range(0,length):
+# dbidx = 'db%d'%i
+# msg +=" %03d"% ord(packetParsed[dbidx])
+ msg = self.client.packet2parsedstr(packet)
print msg
# if we want to print just the message as it is read off the chip
else:
msgIDs = []
self.client.serInit()
self.client.MCPsetup()
- for i in range(low, high, 6):
+ for i in range(low, high+1, 6):
print "sniffing id: %d, %d, %d, %d, %d, %d" % (i,i+1,i+2,i+3,i+4,i+5)
comment= "sweepFilter: "
#comment = "sweepFilter_%d_%d_%d_%d_%d_%d" % (i,i+1,i+2,i+3,i+4,i+5)
ids = []
self.client.serInit()
self.client.MCPsetup()
- for i in range(0,number,6):
+ for i in range(0,number+1,6):
idsTemp = []
comment = "sweepFilter: "
for j in range(0,6,1):
print "CANINTF: %02x" %self.client.peek8(0x2C);
+
+
+ def addFilter(self,standardid,comment, verbose= True):
+ ### ON-CHIP FILTERING
+ if(standardid != None):
+ if( comment == None):
+ comment = ""
+ self.client.MCPreqstatConfiguration();
+ self.client.poke8(0x60,0x26); # set RXB0 CTRL register to ONLY accept STANDARD messages with filter match (RXM1=0, RMX0=1, BUKT=1)
+ self.client.poke8(0x20,0xFF); #set buffer 0 mask 1 (SID 10:3) to FF
+ self.client.poke8(0x21,0xE0); #set buffer 0 mask 2 bits 7:5 (SID 2:0) to 1s
+ if(len(standardid)>2):
+ self.client.poke8(0x70,0x20); # set RXB1 CTRL register to ONLY accept STANDARD messages with filter match (RXM1=0, RMX0=1)
+ self.client.poke8(0x24,0xFF); #set buffer 1 mask 1 (SID 10:3) to FF
+ self.client.poke8(0x25,0xE0); #set buffer 1 mask 2 bits 7:5 (SID 2:0) to 1s
+
+ for filter,ID in enumerate(standardid):
+
+ if (filter==0):
+ RXFSIDH = 0x00;
+ RXFSIDL = 0x01;
+ elif (filter==1):
+ RXFSIDH = 0x04;
+ RXFSIDL = 0x05;
+ elif (filter==2):
+ RXFSIDH = 0x08;
+ RXFSIDL = 0x09;
+ elif (filter==3):
+ RXFSIDH = 0x10;
+ RXFSIDL = 0x11;
+ elif (filter==4):
+ RXFSIDH = 0x14;
+ RXFSIDL = 0x15;
+ else:
+ RXFSIDH = 0x18;
+ RXFSIDL = 0x19;
+
+ #### split SID into different regs
+ SIDlow = (ID & 0x07) << 5; # get SID bits 2:0, rotate them to bits 7:5
+ SIDhigh = (ID >> 3) & 0xFF; # get SID bits 10:3, rotate them to bits 7:0
+
+ #write SID to regs
+ self.client.poke8(RXFSIDH,SIDhigh);
+ self.client.poke8(RXFSIDL, SIDlow);
+
+ if (verbose == True):
+ print "Filtering for SID %d (0x%02xh) with filter #%d"%(ID, ID, filter);
+ comment += ("f%d" %(ID))
+
+
+
+ # this will sweep through the given ids to request a packet and then sniff on that
+ # id for a given amount duration. This will be repeated the number of attempts time
+
+ #at the moment this is set to switch to the next id once a message is identified
+ def rtrSweep(self,freq,lowID,highID, attempts = 2,duration = 1, verbose = True):
+ self.client.serInit()
+ self.spitSetup(freq)
+
+ for i in range(lowID,highID+1, 1):
+ standardid = [i, i, i]
+ #set filters
+ self.addFilter(standardid, comment, verbose = True)
+ #### split SID into different regs
+ SIDlow = (standardid[0] & 0x07) << 5; # get SID bits 2:0, rotate them to bits 7:5
+ SIDhigh = (standardid[0] >> 3) & 0xFF; # get SID bits 10:3, rotate them to bits 7:0
+ #create RTR packet
+ packet = [SIDhigh, SIDlow, 0x00,0x00,0x40]
+ self.client.txpacket(packet)
+ ## listen for 2 packets. one should be the rtr we requested the other should be
+ ## a new packet response
+ packet1=self.client.rxpacket();
+ packet2=self.client.rxpacket();
+ if( packet1 != None and packet2 != None):
+ print "packets recieved :\n "
+ print self.client.packet2parsedstr(packet1);
+ print self.client.packet2parsedstr(packet2);
+ continue
+ trial= 1;
+ # for each trial
+ while( trial <= attempts):
+ self.client.MCPrts(TXB0=True);
+ starttime = time.time()
+ # this time we will sniff for the given amount of time to see if there is a
+ # time till the packets come in
+ while( time.time()-starttime < duration):
+ packet1=self.client.rxpacket();
+ packet2=self.client.rxpacket();
+
+ if( packet1 != None and packet2 != None):
+ print "packets recieved :\n "
+ print self.client.packet2parsedstr(packet1);
+ print self.client.packet2parsedstr(packet2);
+ break
def spitSetup(self,freq):
self.reset();
print "Transmitting packet: "
- for byte in packet:
- print "%02x " %byte,
+ print self.client.packet2str(packet)
self.client.txpacket(packet);
while(1):
self.client.MCPrts(TXB0=True);
print "messages injected"
+
# MORE DEBUGGING
if(debug):
checkcount = 0;
projects / goodfet / commitdiff