EXTI15_10 not triggered by user button on NUCLEO-F429ZI

[Fnx_QT]

Hello,

I'm trying to setup interrupts using the user push button (B1) on the Nucleo-F429ZI board. The push button is connected to the microcontroller through the I/O line PC13.

What I did is that I mapped the PC13 to the GPIO_EXTI15 in STM32CubeMX and enabled the NVIC interrupt for EXTI15_10. Then I regenerated the code which gave me the following function in main:

static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
 
  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOC_CLK_ENABLE();
 
  /*Configure GPIO pin : PC13 */
  GPIO_InitStruct.Pin = GPIO_PIN_13;
  GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
 
  /* EXTI interrupt init*/
  HAL_NVIC_SetPriority(EXTI15_10_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);
 
}

I call it in the main after initializing the clocks. However, after the function has been executed, pressing the button does not trigger an interrupt. I enabled interrupt tracing and I can see that the interrupt is never triggered and my callback is therefor never called.

Did I do something wrong ? Thank you.

[Fnx_QT]

Yes they're enaled. HAL_Delay(10) is working and to be sure I use the __enable_irq() function.

[Sarra.S]

Did you try with other interrupts ? not with the push button but with another pin that you can set and reset

[Fnx_QT · Accepted solution]

I finally found the problem... All the configuration was good, the only thing that broke my system was a preprocessor symbol define that was included in my example project : CMSIS_NVIC_VIRTUAL HSE_VALUE=8000000. I still don't know what purpose it serves.

In addition, the cmsis_nvic_virtual.h was used and some NVIC functions were redefined:

#define NVIC_SetPriorityGrouping    __NVIC_SetPriorityGrouping
#define NVIC_GetPriorityGrouping    __NVIC_GetPriorityGrouping
#define NVIC_EnableIRQ(IRQn)        svcNVIC_func(2U, IRQn)
#define NVIC_GetEnableIRQ           __NVIC_GetEnableIRQ
#define NVIC_DisableIRQ(IRQn)       svcNVIC_func(4U, IRQn)
#define NVIC_GetPendingIRQ          __NVIC_GetPendingIRQ
#define NVIC_SetPendingIRQ          __NVIC_SetPendingIRQ
#define NVIC_ClearPendingIRQ(IRQn)  svcNVIC_func(7U, IRQn)
#define NVIC_GetActive              __NVIC_GetActive
#define NVIC_SetPriority            __NVIC_SetPriority
#define NVIC_GetPriority            __NVIC_GetPriority
#define NVIC_SystemReset            __NVIC_SystemReset

Upon removing these two modifications, the button interrupt is now working correctly.

Thank you all for your help.