Changes between Version 2 and Version 3 of BlueCANReader

Timestamp:

05/31/13 03:08:29 (11 years ago)

Author:

Boris Ioffe

Comment:

--

BlueCANReader

@@ -17 +17 @@
 
 
+
 {{{
-def parseLine(line):
-    msgLength = line[0] & 0b1111
-    isExtended = (line[0] >> 4) & 1
-    isRTR = (line[0] >> 5) & 1
-    payload = line[1:msgLength+1]
-    id = line[-4:]
-    id =  id[0] + (id[1] << 8) + (id[2] << 16) + (id[3] << 24)
-    #print msgLength, isExtended, isRTR, [hex(x) for x in payload], hex(id)
-    return id, payload
+to send a CAN message: 
 
+    3Ah,3Dh,(X),  ID0,ID1,ID2,ID3,   byte0,byte1,byte2,byte3,byte4,byte5,byte6,byte7       (number of bytes depends on (X) value)
 
+(X) is bitmapped value: 
+    i.e.  00111000b
+    bit3 bit2 bit1 bit0 defines number of DATA bytes to send on CAN BUS    1000b will send 8 bytes, (when CANex module receives (X) with last 4 bits equal 1000b, it will expect 4 bytes for ID + 8 bytes for DATA bytes to send)
+    bit4 is CAN EXTENSION bit normaly =1 for NMEA
+    bit5 is RTR mark, normaly =0
+    bit6 and bit7 MUST BE 0 !!!!!!!!
 
-while True:
-    s = ser.read()
-    if s == ";":
-        buffer = buffer[1:]
-        print [x for x in buffer]
-        print buffer
-        id,strData = parseLine(buffer)
-        buffer = bytearray()
-#        strID, strData = parseLine(buffer)
-#        id = int(strID, base=16)
-        priority, source_id, pgn, destination_id  = parseCanID(id)
-#
-        print strformat.format(i, buffer, id, (priority, source_id, pgn, destination_id)), strData, msgdict.get(pgn)
-#        i+=1
-#        buffer = ''
-    else:
-        buffer.append(ord(s))
 }}}