LPTIM cnt Initialize

[MWisi.1]

I am using the low power timer (LPTIM), but i need to initialize the timer value to 30000 before start the counting.

Is it possible ?

Thank you!

[TDK]

Yes:

LPTIM1->CNT = 30000;

You can do this prior to using HAL_TIM_Base_Start() HAL_LPTIM_*_Start if you're using HAL since the function doesn't touch the counter.

[MWisi.1]

hi @TDK​ 

I had done

LPTIM1->CNT = 30000;

But, i hadnt used the HAL_TIM_Base_Start()!

I will try then tomorrow this sequence!

LPTIM1->CNT = 30000;

HAL_TIM_Base_Start(&s_TimerInstance);

Can i always repete this sequence in at any point in the program and repeat it ?

Because i will receive a LoRaWAN message that contains this LPTIM1 value.

I will have to change the LPTIM1 many times

Thanks

[TDK]

Yes you can change the counter during execution. If you’re interested in the details, read through the timer section of the reference manual.

[MWisi.1]

Did you see that is not writable the lptim counter ?

[MWisi.1]

hi,

can you send a example setting the LPTIM1 counter value ?

Thanks!

[TDK]

My first reply does this...

[TDK]

If you are brand new, perhaps look at some examples which use the timer. Here are some results from searching:

https://github.com/STMicroelectronics/STM32CubeG4/search?q=MX_LPTIM1_Init

You need to use HAL_LPTIM_* functions to interface with LPTIM timers, not HAL_TIM_* as I wrote previously.

Good luck.

[MWisi.1]

Hi, i had tried that but got compiler error!