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karlding/testj1939.py

Created April 25, 2020 09:45
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  1. karlding created this gist Apr 25, 2020.
    27 changes: 27 additions & 0 deletions testj1939.py
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,27 @@
    """A partial re-implementation of testj1939 from can-utils in Python to test
    https://github.com/python/cpython/pull/19538
    """
    import socket


    def main():
    with socket.socket(
    family=socket.PF_CAN, type=socket.SOCK_DGRAM, proto=socket.CAN_J1939
    ) as s:
    s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
    addr = "vcan0", socket.J1939_NO_NAME, socket.J1939_NO_PGN, socket.J1939_NO_ADDR
    s.bind(addr)

    while True:
    data, addr = s.recvfrom(128)
    print("{:02x} {:05x}:".format(addr[3], addr[2]), end="")

    for j in range(len(data)):
    if j % 8 == 0 and j != 0:
    print("\n{:05x} ".format(j), end="")
    print(" {:02x}".format(data[j]), end="")
    print("\n", end="")


    if __name__ == "__main__":
    main()