STM32: Timer encoder reset

Question

I configured my TIM4 as encoder input and everything is working well when I execute TIM_GetCounter(TIM4) But I would like to put the timer value back to 0 (reset?) when I press a push button with an interrupt on it) and I don't find a reset function. I'm running a STM32F103 with only StdPeriph Lib.

Answer 1

You should write one for yourself based on the 'get' function:

uint32_t TIM_GetCounter(TIM_TypeDef* TIMx)
{
 /* Check the parameters */
 assert_param(IS_TIM_ALL_PERIPH(TIMx));
 /* Get the Counter Register value */
 return TIMx->CNT;
}

So a TIM_ResetCounter should look like this:

void TIM_ResetCounter(TIM_TypeDef* TIMx)
{
 /* Check the parameters */
 assert_param(IS_TIM_ALL_PERIPH(TIMx));
 /* Reset the Counter Register value */
 TIMx->CNT = 0;
}

If you check in the reference manual, you can see that the counter value register has read-write access. So you can set it to 0.

enter image description here

You can create a general set function as well with an additional "value" parameter.