Change PIT Timer Period While Running

D_TTSA — Thu, 03 Jun 2021 15:01:47 GMT

Good day

I have a PIT timer that generates an interrupt every ms.

I would like to adjust the period on a regular basis in my program.

I tried calling the PIT_SetTimerPeriod() function, but this seems to have no effect.

I think that perhaps the timer must be stopped before the period can be adjusted.

Is there a way around this? Is it possible to change the timer period while the timer is running so that it doesn't lose it's counter?

I would like to delay the interrupt from occurring slightly sometimes, and sometimes have the interrupt happen sooner, preferably without having to de-initialise and re-initialise it every time.

Kind regards

Re: Change PIT Timer Period While Running

D_TTSA — Mon, 07 Jun 2021 10:23:36 GMT

Update: I figured it out.

First, store the number of ticks already counted (if necessary) by subtracting the previous period by PIT_GetCurrentTimerCount(...).

Then call PIT_StopTimer(...) to stop the timer.

Then change the period with PIT_SetTimerPeriod(...).

Then call PIT_StartTimer(...) to restart the timer with the new period.

topic Re: Change PIT Timer Period While Running in i.MX RT Crossover MCUs

Change PIT Timer Period While Running

Re: Change PIT Timer Period While Running