EXTI by STM32Cube setting is not fired (SOLVED - mistake)

[ivan239955_stm1_stmicro_com]

Posted on October 05, 2014 at 19:48

I set PC4 as EXTI4 on STM32F405 using STM32Cube so MX_GPIO_Init() contains:

__GPIOC_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_4;
GPIO_InitStruct.Mode = GPIO_MODE_EVT_RISING;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
HAL_NVIC_SetPriority(EXTI4_IRQn, 3, 0);
HAL_NVIC_EnableIRQ(EXTI4_IRQn);

I set breakpoint in stm32f4xx_it.c:

void EXTI4_IRQHandler(void)
{
NVIC_ClearPendingIRQ(EXTI4_IRQn);
__HAL_GPIO_EXTI_CLEAR_IT(GPIO_PIN_4);
// My code
}

I have checked a presence of the rising edge on PC4 (INT signal of an accelerometer) by scope but the interrupt is not fired. Does anybody have an opinion or any advice? Thank you.

[ivan239955_stm1_stmicro_com]

Posted on October 10, 2014 at 09:37

My mistake - I have not noticed that the Event not Interrupt selection remained set in the STM32CubeMX for the corresponding pin.