class DoCan:
def __init__(self, channel):
"""Open connection with Vector hardware on selected channel,
channel is 0 based"""
xcp_rx_id = 0x1CE9F827
can_filters = [{"can_id": 0x1CE9F827, "can_mask": 0x0, "extended": True}]
self.bus = VectorBus(channel=[channel], app_name='CANoe', can_filters=can_filters)
# can_filters = [{"can_id": xcp_rx_id, "can_mask": 0xFFFFFFFF, "extended": True}]
# self.bus.set_filters(can_filters)
# self.reader = can.BufferedReader()
self.notifier = can.Notifier(self.bus, [can.BufferedReader()])
def connect(self):
xcp_tx_id = 0xE927F8
xcp_connect = can.Message(arbitration_id=xcp_tx_id, dlc=8, extended_id=True,
data=[0xFF, 0, 0, 0, 0, 0, 0, 0])
self.bus.send(xcp_connect)
def print_latest(self):
msg = self.notifier.listeners[0].get_message()
print('from latest {}'.format(msg))
def cyclic_thread(self, ID):
my_lock = threading.Lock()
pto_data = [0]
pto_msg = can.Message(arbitration_id=ID, dlc=1, extended_id=True, data=pto_data)
task = can.broadcastmanager.ThreadBasedCyclicSendTask(self.bus, my_lock, pto_msg, .01)
task.start()
return task
@staticmethod
def modify(thread):
pto_data = [1]
pto_msg = can.Message(arbitration_id=0x18fef0fe, dlc=1, extended_id=True, data=pto_data)
thread.modify_data(pto_msg)
class XcpCommunicator:
def __init__(self, channel):
conn = sqlite3.connect('main.db')
self.c = conn.cursor()
self.xcp_tx_id = 0xE927F8
# configure logging settings
logging.basicConfig(level=logging.DEBUG,
format=' %(asctime)s - %(levelname)s- %(message)s')
'''Open connection with Vector hardware, configure channel'''
can.rc['interface'] = 'vector'
can.rc['channel'] = 0
can.rc['bitrate'] = 500000
self.bus = VectorBus(channel=[channel], app_name='CANoe')
def check_xcp_response(self):
# slave to master:
xcp_rx_id = 0x1CE9F827
# read response
# NOTE: add more sophisticated XCP error reporting using error array
for recvd_msg in self.bus:
if recvd_msg.arbitration_id == xcp_rx_id:
return recvd_msg
def write_xcp(self, message):
self.bus.send(message)
response_message = self.check_xcp_response()
command = hex(message.data[0])
if response_message.data[0] == 0xFF:
# response indicates command succesful
logging.debug('Command: {} Response: Success'.format(command))
elif response_message.data[0] == 0xFE:
# response indicates error, report error
error_code = response_message.data[1]
self.c.execute("SELECT * FROM error_array WHERE error_code=?",
(error_code, ))
error_info = self.c.fetchone()
if error_info is not None:
logging.debug('Command: {} Response: {} {}'.format(
command, error_info[1], error_info[2].strip()))
else:
logging.debug('Command: {} Response: {}'.format(
hex(message.data[0]), hex(response_message.data[1])))
else:
pass
def send_connect(self):
xcp_connect = can.Message(arbitration_id=self.xcp_tx_id,
dlc=8,
extended_id=True,
data=[0xFF, 0, 0, 0, 0, 0, 0, 0])
self.write_xcp(xcp_connect)
def xcp_stop(self):
xcp_stop_daq = can.Message(arbitration_id=self.xcp_tx_id,
dlc=8,
extended_id=True,
data=[0xFE, 0, 0, 0, 0, 0, 0, 0])
self.write_xcp(xcp_stop_daq)
def setup_daq(self, address):
xcp_tx_id = 0xE927F8
self.send_connect()
# This command clears all DAQ lists
xcp_free_daq = can.Message(arbitration_id=xcp_tx_id,
dlc=8,
extended_id=True,
data=[0xD6, 0, 0, 0, 0, 0, 0, 0])
self.write_xcp(xcp_free_daq)
# allocate daq lists
daq_count = 1
alloc_daq_array = struct.pack('<Bxhxxxx', 0xD5, daq_count)
xcp_alloc_daq = can.Message(arbitration_id=xcp_tx_id,
dlc=8,
extended_id=True,
data=alloc_daq_array)
self.write_xcp(xcp_alloc_daq)
# allocate and assign ODT
daq_list_number = 0
odt_count = 1
alloc_odt_array = struct.pack('<BxhBxxx', 0xD4, daq_list_number,
odt_count)
xcp_alloc_odt = can.Message(arbitration_id=xcp_tx_id,
dlc=8,
extended_id=True,
data=alloc_odt_array)
self.write_xcp(xcp_alloc_odt)
# allocate entries and assign to specific ODT in DAQ list
odt_number = 0
number_of_entries = 1
alloc_odt__entry_array = struct.pack('<BxhBBxx', 0xD3, daq_list_number,
odt_number, number_of_entries)
xcp_alloc_odt_entry = can.Message(arbitration_id=xcp_tx_id,
dlc=8,
extended_id=True,
data=alloc_odt__entry_array)
self.write_xcp(xcp_alloc_odt_entry)
# configure DAQ lists
# initializes the DAQ list pointer for a subsequent operation with WRITE_DAQ or READ_DAQ.
xcp_set_daq_ptr = can.Message(arbitration_id=xcp_tx_id,
dlc=8,
extended_id=True,
data=[0xE2, 0, 0, 0, 0, 0, 0, 0])
self.write_xcp(xcp_set_daq_ptr)
# en_PscActivationState, SLONG length = 4, address = 0x20080CC
bit_offset = 0xFF # normal data element
element_size = 4
address_extension = 0
write_daq_data = struct.pack('<BBBBi', 0xE1, bit_offset, element_size,
address_extension, address)
xcp_write_daq = can.Message(arbitration_id=xcp_tx_id,
dlc=8,
extended_id=True,
data=write_daq_data)
self.write_xcp(xcp_write_daq)
xcp_set_daq_list_mode = can.Message(arbitration_id=xcp_tx_id,
dlc=8,
extended_id=True,
data=[0xE0, 0, 0, 0, 1, 0, 2, 0])
self.write_xcp(xcp_set_daq_list_mode)
xcp_start_stop_daq_list = can.Message(arbitration_id=xcp_tx_id,
dlc=8,
extended_id=True,
data=[0xDE, 2, 0, 0, 0, 0, 0, 0])
self.write_xcp(xcp_start_stop_daq_list)
xcp_start_daq = can.Message(arbitration_id=xcp_tx_id,
dlc=8,
extended_id=True,
data=[0xDD, 1, 0, 0, 0, 0, 0, 0])
self.write_xcp(xcp_start_daq)
def graph_response(self, time_delay):
for i in range(time_delay):
recvd_msg = self.check_xcp_response()
y = struct.unpack('<xIxxx', recvd_msg.data)
#y = (y[0] / 100000)
# plt.scatter(i, y, '-')
# plt.pause(.05)
print(y)
time.sleep(1)
