STM32F401C TIM2 Interrupt

[fritz1234]

Hello,

I try to use a TIM2 Interrupt to toggle a LED. I use a STM32F401C controller.

If I toggle the LED inside the while loop with delay, it works fine.

 while (1)
  {
    HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_15);
    HAL_Delay(1000);
  }

But there is no interrupt for TIM2.

I attached the CubeMX ioc file. Have I forgotten something to parmatrize?

[waclawek.jan]

Read out and check/post content of TIM and relevant GPIO registers.

JW

[fritz1234 · Accepted solution]

I forgot to call

TIM2-> DIER = TIM_DIER_UIE;

Is there a HAL Function to set TIM->DIER ?

These are the values of the peripheral TIM2 and NVIC. Timer 2 is counting.

   

[waclawek.jan]

Thanks for coming back with the solution.

> Is there a HAL Function to set TIM->DIER ?

I don't know, I don't use Cube/HAL. Probably there's a macro. Cube/HAL is open source.

However, I believe, under Cube/HAL  you are not supposed to set TIMx_DIER directly; you are supposed to call some of the HAL_xxx_Start_IT() functions (or something like that) which do this for you. Read the HAL/Cube documentation (which is mostly the comments to functions which you can see also in the source code).

JW