Interrupt not triggered on EXTI1

[kkhli.1]

actually I'm using stm32F446RE, I'm using hal library just to detect external interrupt from PA1 pin but it doesn't work, and if I put the interrupt from PA0 pin, it works fine?

/* USER CODE BEGIN 0 */

 void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)

{

 count++; 

}

int main(void)

{

 HAL_Init();

 SystemClock_Config();

 MX_GPIO_Init();

 MX_TIM1_Init();

 while (1)

 {

 }

}

void MX_GPIO_Init(void)

{

 GPIO_InitTypeDef GPIO_InitStruct = {0};

 /* GPIO Ports Clock Enable */

 __HAL_RCC_GPIOH_CLK_ENABLE();

 __HAL_RCC_GPIOA_CLK_ENABLE();

 /*Configure GPIO pin : PA1 */

 GPIO_InitStruct.Pin = GPIO_PIN_1;

 GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;

 GPIO_InitStruct.Pull = GPIO_NOPULL;

 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

 /* EXTI interrupt init*/

 HAL_NVIC_SetPriority(EXTI1_IRQn, 0, 0);

 HAL_NVIC_EnableIRQ(EXTI1_IRQn);

}

[Sarra.S]

Hello @kkhli.1​,

Check that the EXTI1_IRQ interrupt is not being masked by other interrupts with higher priorities

[kkhli.1]

hello ,i'm using only one interrupt

[waclawek.jan]

Make sure you have connection from physical PA1 pin to the point you think the signal is. Observe input in GPIOA_IDR, or set PA1 as output and toggle.

Read out and check EXTI and relevant GPIO and SYSCFG registers content.

Other than that, follow the usual "interrupt does not fire" checklist.

JW

[kkhli.1 · Accepted solution]

thx for your answers @Sarra.S​ @Community member​ , i just replaced the stm card and it works

the pb that the pin PA1 is burnt