python-can-isotp was blocking

[mikisama]

Hi, @pylessard

python-can-isotp was blocking when I use CANalyst-II interface with python-can.

python-can-isotp/isotp/protocol.py

Line 1089 in b770430

msg = self.bus.recv(0)

I fix this by changing the timeout parameter to 0.1

msg = self.bus.recv(0.1) 

[mikisama]

test code

import can
import isotp
import udsoncan
from udsoncan.client import Client
from udsoncan.connections import PythonIsoTpConnection


udsoncan.setup_logging()

bus_config = {
    "interface": "canalystii",
    # "interface": "vector",
    "channel": 0,
    "baud": 500000,
    "can_filters": [
        {"can_id": 0x693, "can_mask": 0xFFFFFFFF},
    ],
}

bus = can.interface.Bus(**bus_config)
# send something to start
bus.send(can.Message(arbitration_id=0))
bus.recv(0.5)

isotp_params = {
    "tx_padding": 0xCC,
}

addr = isotp.Address(isotp.AddressingMode.Normal_11bits, rxid=0x693, txid=0x692)
stack = isotp.CanStack(bus, address=addr, params=isotp_params)

conn = PythonIsoTpConnection(stack)
with Client(conn, request_timeout=5) as client:
    client.change_session(1)