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#!/usr/bin/env python

"""

This demo creates multiple processes of producers to spam a socketcan bus.

"""

from time import sleep

from concurrent.futures import ProcessPoolExecutor

import can

def producer(thread_id: int, message_count: int = 16) -> None:

"""Spam the bus with messages including the data id.

:param thread_id: the id of the thread/process

:param message_count: the number of messages that shall be send

"""

with can.Bus(bustype="socketcan", channel="vcan0") as bus: # type: ignore

for i in range(message_count):

msg = can.Message(

arbitration_id=0x0CF02200 + thread_id,

data=[thread_id, i, 0, 1, 3, 1, 4, 1],

)

bus.send(msg)

sleep(1.0)

print(f"Producer #{thread_id} finished sending {message_count} messages")

if __name__ == "__main__":

with ProcessPoolExecutor() as executor:

executor.map(producer, range(5))