STM32w108 delay function with Ember stack

[w23]

Posted on December 16, 2011 at 15:09

hi,

i have a problem with delay time function of the STM32W108 and EmberZnet stack. so I want a delay time of more than 10 seconds. I used the HAL library and especially the function: halCommonDelayMilliseconds(); it was exactly like this: halCommonDelayMilliseconds(10000); when I put it ON the delay was only for less than 3seconds and the uC make a WDG reset. can you help me with a function of delay time more than 10 seconds? thank you so much

[Tesla DeLorean]

Posted on December 16, 2011 at 17:07

Break the delay down into digestible pieces, and kick the watch dog, repeat.

Otherwise take it up with the vendor's support contact.

[w23]

Posted on December 16, 2011 at 17:23

sorry, I didn't understand what you mean. How can I do it?

there is no function for max delay?!!

[Tesla DeLorean]

Posted on December 16, 2011 at 17:45

You'll have to work on the implementation details

void delaylongms(int delay)
{
while(delay > 2500) // 2.5 seconds
{
delayms(2500); // watch dog in 3 seconds
kickwatchdog();
delay -= 2500;
}
if (delay > 0) // consume any remaining delay
delayms(delay);
}

[w23]

Posted on December 16, 2011 at 18:43

thank you so much.

I found an other solution. It's a function that disable WDG. so the code is: FUNCTION0();  halInternalDisableWatchDog(MICRO_DISABLE_WATCH_DOG_KEY);  halCommonDelayMilliseconds(60000);  halInternalWatchDogEnabled();   FUNCTION1();   So in this case, I  do the FUNCTION0(), disable the WDG, delay function then enable WDG and finally FUNCTION1. this is the solution for disabling the WDG in STM32W108 with EmberZnet API. thanks again

[Tesla DeLorean]

Posted on December 16, 2011 at 19:18

I'm not sure I'd disable it, what if something goes wrong in the background and it never comes back? I think my earlier suggestion is more robust, and works better as a subroutine abstraction than placed in-line.

The kicking function in your case appears to be

halInternalResetWatchDog();

void delaylongms(int delay)
{
while(delay > 2500) // 2.5 seconds, use 1 second if more appropriate
{
halCommonDelayMilliseconds(2500); // watch dog in 3 seconds
halInternalResetWatchDog();
delay -= 2500;
}
if (delay > 0) // consume any remaining delay
halCommonDelayMilliseconds(delay);
}