def decrypt_dtc_code(code):
"""Returns the 5-digit DTC code from hex encoding"""
dtc = []
current = code
for i in range(0,3):
if len(current)<4:
raise "Tried to decode bad DTC: %s" % code
# type code
tc = carberry_sensors.hex_to_int(current[0])
tc >>= 2
if tc == 0:
type = "P"
elif tc == 1:
type = "C"
elif tc == 2:
type = "B"
elif tc == 3:
type = "U"
else:
raise tc
dig1 = str(carberry_sensors.hex_to_int(current[0]) & 3)
dig2 = str(carberry_sensors.hex_to_int(current[1]))
dig3 = str(carberry_sensors.hex_to_int(current[2]))
dig4 = str(carberry_sensors.hex_to_int(current[3]))
dtc.append(type+dig1+dig2+dig3+dig4)
current = current[4:]
return dtc
def decrypt_dtc_code(code):
"""Returns the 5-digit DTC code from hex encoding"""
dtc = []
current = code
for i in range(0, 3):
if len(current) < 4:
raise "Tried to decode bad DTC: %s" % code
# type code
tc = carberry_sensors.hex_to_int(current[0])
tc >>= 2
if tc == 0:
type = "P"
elif tc == 1:
type = "C"
elif tc == 2:
type = "B"
elif tc == 3:
type = "U"
else:
raise tc
dig1 = str(carberry_sensors.hex_to_int(current[0]) & 3)
dig2 = str(carberry_sensors.hex_to_int(current[1]))
dig3 = str(carberry_sensors.hex_to_int(current[2]))
dig4 = str(carberry_sensors.hex_to_int(current[3]))
dtc.append(type + dig1 + dig2 + dig3 + dig4)
current = current[4:]
return dtc
def get_dtc(self):
"""Returns a list of all pending DTC codes. Each element consists of
a 2-tuple: (DTC code (string), Code description (string) )"""
dtcLetters = ["P", "C", "B", "U"]
r = self.sensor(1)[1] #data
dtcNumber = r[0]
mil = r[1]
DTCCodes = []
print "Number of stored DTC:" + str(dtcNumber) + " MIL: " + str(mil)
# get all DTC, 3 per mesg response
for i in range(0, ((dtcNumber + 2) / 3)):
self.send_command(GET_DTC_COMMAND)
res = self.get_result()
print "DTC result:" + res
for i in range(0, 3):
val1 = hex_to_int(res[3 + i * 6:5 + i * 6])
val2 = hex_to_int(
res[6 + i * 6:8 + i *
6]) #get DTC codes from response (3 DTC each 2 bytes)
val = (val1 << 8) + val2 #DTC val as int
if val == 0: #skip fill of last packet
break
DTCStr = dtcLetters[(val & 0xC000) > 14] + str(
(val & 0x3000) >> 12) + str((val & 0x0f00) >> 8) + str(
(val & 0x00f0) >> 4) + str(val & 0x000f)
DTCCodes.append(["Active", DTCStr])
#read mode 7
self.send_command(GET_FREEZE_DTC_COMMAND)
res = self.get_result()
if res[:7] == "NODATA": #no freeze frame
return DTCCodes
print "DTC freeze result:" + res
for i in range(0, 3):
val1 = hex_to_int(res[3 + i * 6:5 + i * 6])
val2 = hex_to_int(
res[6 + i * 6:8 +
i * 6]) #get DTC codes from response (3 DTC each 2 bytes)
val = (val1 << 8) + val2 #DTC val as int
if val == 0: #skip fill of last packet
break
DTCStr = dtcLetters[(val & 0xC000) > 14] + str(
(val & 0x3000) >> 12) + str((val & 0x0f00) >> 8) + str(
(val & 0x00f0) >> 4) + str(val & 0x000f)
DTCCodes.append(["Passive", DTCStr])
return DTCCodes
def get_dtc(self):
"""Returns a list of all pending DTC codes. Each element consists of
a 2-tuple: (DTC code (string), Code description (string) )"""
dtcLetters = ["P", "C", "B", "U"]
r = self.sensor(1)[1] #data
dtcNumber = r[0]
mil = r[1]
DTCCodes = []
print "Number of stored DTC:" + str(dtcNumber) + " MIL: " + str(mil)
# get all DTC, 3 per mesg response
for i in range(0, ((dtcNumber+2)/3)):
self.send_command(GET_DTC_COMMAND)
res = self.get_result()
print "DTC result:" + res
for i in range(0, 3):
val1 = hex_to_int(res[3+i*6:5+i*6])
val2 = hex_to_int(res[6+i*6:8+i*6]) #get DTC codes from response (3 DTC each 2 bytes)
val = (val1<<8)+val2 #DTC val as int
if val==0: #skip fill of last packet
break
DTCStr=dtcLetters[(val&0xC000)>14]+str((val&0x3000)>>12)+str((val&0x0f00)>>8)+str((val&0x00f0)>>4)+str(val&0x000f)
DTCCodes.append(["Active",DTCStr])
#read mode 7
self.send_command(GET_FREEZE_DTC_COMMAND)
res = self.get_result()
if res[:7] == "NODATA": #no freeze frame
return DTCCodes
print "DTC freeze result:" + res
for i in range(0, 3):
val1 = hex_to_int(res[3+i*6:5+i*6])
val2 = hex_to_int(res[6+i*6:8+i*6]) #get DTC codes from response (3 DTC each 2 bytes)
val = (val1<<8)+val2 #DTC val as int
if val==0: #skip fill of last packet
break
DTCStr=dtcLetters[(val&0xC000)>14]+str((val&0x3000)>>12)+str((val&0x0f00)>>8)+str((val&0x00f0)>>4)+str(val&0x000f)
DTCCodes.append(["Passive",DTCStr])
return DTCCodes
