registered function on Timerchannel gets not executed

[tlo]

Hi,
i try to register a user defined function for a periodic timer interupt on the wipy.
This works:

Code: Select all

tim = Timer(1, mode=Timer.PERIODIC)
tim_a = tim.channel(Timer.A, freq=700)
tim_a.irq(handler=lambda t: pin_step.toggle())

This not. There is no error, the wipy just seems to ignore the handler silently.:

Code: Select all

def stepnext():
    pin_step.toggle()

tim = Timer(1, mode=Timer.PERIODIC)
tim_a = tim.channel(Timer.A, freq=700)
tim_a.irq(handler=lambda t: stepnext())
#I also tried this:
#tim_a.irq(handler=stepnext())

Am i missing something?
Thanks Thilo

[Oli_]

According to some example found in the documentaton, this work like that :

Code: Select all

def stepnext(timer):
    pin_step.toggle()

tim = Timer(1, mode=Timer.PERIODIC)
tim_a = tim.channel(Timer.A, freq=700)
tim_a.irq(handler=stepnext)

[tlo]

Yep, thats it. I seems to have overlooked the parameter of the function.
Thanks a lot!

[pythoncoder]

This is surely a bug. Even with

Code: Select all

import micropython
micropython.alloc_emergency_exception_buf(100)

the version where the ISR has no argument quietly fails to run with no error message being reported.