+
+
+ def addFilter(self,standardid, verbose= True):
+ comment = None
+ ### ON-CHIP FILTERING
+ if(standardid != None):
+ 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);
+
+ self.client.MCPreqstatNormal();
+
+
+ # 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 = 1,duration = 1, verbose = True):
+ #set up file
+ now = datetime.datetime.now()
+ datestr = now.strftime("%Y%m%d")
+ path = self.DATALOCATION+datestr+"_rtr.csv"
+ filename = path
+ outfile = open(filename,'a');
+ dataWriter = csv.writer(outfile,delimiter=',');
+ dataWriter.writerow(['# Time Error Bytes 1-13']);
+ dataWriter.writerow(['#' + "rtr sweep from %d to %d"%(lowID,highID)])
+ print "started"
+ #self.client.serInit()
+ #self.spitSetup(freq)
+ for i in range(lowID,highID+1, 1):
+ self.client.serInit()
+ self.spitSetup(freq)
+ standardid = [i, i, i, i]
+ #set filters
+ self.addFilter(standardid, verbose = True)
+
+ #### split SID into different areas
+ 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]
+ dataWriter.writerow(["#requested id %d"%i])
+ #self.client.poke8(0x2C,0x00); #clear the CANINTF register; we care about bits 0 and 1 (RXnIF flags) which indicate a message is being held
+ #clear buffer
+ packet1 = self.client.rxpacket();
+ packet2 = self.client.rxpacket();
+ #send in rtr request
+ self.client.txpacket(packet)
+ ## listen for 2 packets. one should be the rtr we requested the other should be
+ ## a new packet response
+ starttime = time.time()
+ while ((time.time() - starttime) < duration):
+ packet = self.client.rxpacket()
+ if( packet == None):
+ continue
+ row = []
+ row.append("%f"%time.time()) #timestamp
+ row.append(0) #error flag (not checkign)
+ row.append("rtrRequest_%d"%i) #comment
+ row.append(duration) #sniff time
+ row.append(1) # filtering boolean
+ for byte in packet:
+ row.append("%02x"%ord(byte));
+ dataWriter.writerow(row)
+ print self.client.packet2parsedstr(packet)
+# 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
+# elif( packet1 != None):
+# print self.client.packet2parsedstr(packet1)
+# elif( packet2 != None):
+# print self.client.packet2parsedstr(packet2)
+ trial= 2;
+ # for each trial
+ while( trial <= attempts):
+ print "trial: ", trial
+ 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):
+ packet=self.client.rxpacket();
+ row = []
+ row.append("%f"%time.time()) #timestamp
+ row.append(0) #error flag (not checking)
+ row.append("rtrRequest_%d"%i) #comment
+ row.append(duration) #sniff time
+ row.append(1) # filtering boolean
+ for byte in packet:
+ row.append("%02x"%ord(byte));
+ dataWriter.writerow(row)
+ print self.client.packet2parsedstr(packet)
+# 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
+# elif( packet1 != None):
+# print "just packet1"
+# print self.client.packet2parsedstr(packet1)
+# elif( packet2 != None):
+# print "just packet2"
+# print self.client.packet2parsedstr(packet2)
+ trial += 1
+ print "sweep complete"
+ outfile.close()