chThdSleepMilliseconds in main possible?

[wizhippo]

I'm trying nill out and if I call chThdSleepMilliseconds(250); in main it throws an unhandled excpetion, yet if I move the code into another thread and do not sleep in main I have no issue.

Any ideas?

[utzig]

from demos/STM32/NIL-STM32F100-DISCOVERY/main.c

Code: Select all

  /* This is now the idle thread loop, you may perform here a low priority
     task but you must never try to sleep or wait in this loop. Note that
     this tasks runs at the lowest priority level so any instruction added
     here will be executed after all other tasks have been started.*/
  while (true) {
  }

I guess that would also apply to any code you put under main().

Cheers,
Fabio Utzig

[wizhippo]

Didn't see that. Thank you

[Giovanni]

Correct, no sleeping there.

Giovanni

[ulikoehler]

Is there any point in running `__WFI()` in the main() loop for Cortex-Mx?

Best regards,
Uli

[Giovanni]

Hi,

Yes, placing _WFI in the loop improves power usage, it is not there by default because it can affect some debuggers.

Giovanni