extmod/uasyncio Interface to ISR is problematic #6415
Description
This arose from this forum post. The following code sample only runs the task scheduled by the ISR when the one running task wakes up. Tested on a Pyboard 1.1 running firmware V1.13.
import uasyncio
from machine import Pin
import micropython
async def example_task():
print('example task running')
def task_launcher(_):
print('task_launcher running')
uasyncio.create_task(example_task())
def irq_handler(pin):
print('IRQ!', pin.value())
micropython.schedule(task_launcher, None)
trigger = Pin(Pin.board.X6, Pin.IN, Pin.PULL_UP)
trigger.irq(irq_handler, Pin.IRQ_FALLING | Pin.IRQ_RISING)
async def endless_loop():
while True:
print('Tick.')
await uasyncio.sleep(5)
print('Tock.')
await uasyncio.sleep(5)
uasyncio.run(endless_loop())Given that #6106 is not merged, the problem can't be fixed with an Event.
Is there a way to interface uasyncio with an ISR other than a busy-wait loop?