multitasking with MoveHub

[romarro]

It is possible to do multitaksing with MoveHub?

I have the following program:

from pybricks.hubs import MoveHub
from pybricks.pupdevices import Motor
from pybricks.parameters import Button, Color, Direction, Port, Side, Stop
from pybricks.tools import wait, StopWatch, run_task, multitask

hub = MoveHub()
motor_a = Motor(Port.A)

async def blink(color:Color, duration:int):
    timer = StopWatch()
    hub.light.off()
    l_status = False 
    print("Starting blink")
    while True:
        if timer.time() > duration:
            hub.light.on(color) if l_status else hub.light.off()
            l_status = not l_status
            timer.reset()

async def run_motor_a():
    timer = StopWatch()
    motor_status = 1
    print("Executa motoarele")
    while True:
        if timer.time() > 1000:
            print("run motor"+ str(motor_status)+" * 50")
            motor_a.dc(motor_status*50)
            motor_status = motor_status*(-1)
            timer.reset()


async def main():
    hub.light.on(Color.GREEN)
    await wait(2000)
    print("start")
    await multitask(run_motor_a(), blink(Color.RED, 1000) , race=True)

run_task(main())

The multitask function executes only the first coroutine!

Thanks

[dlech]

There is no await in either task, so it never yields to let other task run.

Instead of using a StopWatch I would suggest to rewrite this as:

async def blink(color: Color, duration: int):
    # some code
    ...
    while True:
        await wait(duration)
        # rest of the code
    ...

[romarro]

Thanks. Problem solved!