Change the interrupt frequency

[Raül G]

Posted on April 11, 2018 at 18:08

Hello,

I'm just starting to create a basic code in order to play with the timer interrupt.

Now I have a little problem: my led blinks but I want to change the frequency when I push the button. Why this code inside the main function don't change the frequency?

while

 {

if (!HAL_GPIO_ReadPin(BotoBlau_GPIO_Port, BotoBlau_Pin))      htim14.Init.Period = 10000;

else  htim14.Init.Period = 2000;

 

}

Thanks!

Raul

[waclawek.jan]

Posted on April 11, 2018 at 18:14

Because that's just a variable, and it does not get magiaclly applied to the real physical register of the timer, only when the initialization function is called.

JW

[Tesla DeLorean]

Posted on April 11, 2018 at 21:00

if (!HAL_GPIO_ReadPin(BotoBlau_GPIO_Port, BotoBlau_Pin))      TIM14->ARR = 10000-1;

else  TIM14->ARR = 2000-1;