send_periodic with SocketCan fails to stop when several tasks are running #720
Description
Hi,
Looks like trying to stop several send_periodic tasks at the same time fails with SocketCan on Raspberry Pi.
task = bus.send_periodic(msg, period) task2 = bus.send_periodic(msg2, period2) task.stop() task2.stop()Here is the error message:
Traceback (most recent call last): File "/home/pi/venv/lib/python3-6/site-packages/can/interfaces/socketcan/socketcan.py", line 280, in send_bcm return bcm_socket.send(data) OSError: [Errno 22] Invalid argument During handling of the above exception, another exception accurred: Traceback (most recent call last): File "test.py", line 9, in <module> task2.stop() File "/home/pi/venv/lib/python3-6/site-packages/can/interfaces/can/bus.py", line 218, in wrapped_stop_method original_stop_method() File "/home/pi/venv/lib/python3-6/site-packages/can/interfaces/socketcan/socketcan.py", line 365, in stop send_bcm(self.bcm_socket, stopframe) File "/home/pi/venv/lib/python3-6/site-packages/can/interfaces/socketcan/socketcan.py", line 285 in send_bcm raise can.CanError(base + "You are probably referring to a non-existing frame.") can.CanError: Couldn't send CAN BCM frame. OS Error 22: Invalid argument You are probably referring to a non-existing frame. I'm using python-can 3.3.2 on a 32 bits Raspbian stretch (v9.4)
Here is the output of uname -a:
pi@raspberrypi:~ $ uname -a Linux raspberrypi 4.14.71-v7+ #1145 SMP Fri Sep 21 15:38:35 BST 2018 armv7l GNU/Linux