3 years, 7 months ago.

STM32 nucleo EXTI interrupt, after signal nucleo stop

with this easy code i make signal to PA0 to enable EXTI interrupt and set count1 to 0

after interrupt nucleo stop loop cycle !

where is my error?


include the mbed library with this snippet

#include "mbed.h"
#include "stm32f4xx.h"
#include "stm32f4xx_hal_tim_ex.h"
#include "stm32f4xx_hal_conf.h"
int16_t count1 = 10; 
void EXTI0_IRQHandler(void)
void HAL_GPIO_EXTI_Callback (uint16_t GPIO_Pin)
    if (GPIO_Pin == GPIO_PIN_0) {
        count1 = 0;
int main()
    GPIO_InitTypeDef GPIO_InitStruct;
    GPIO_InitStruct.Pin = GPIO_PIN_0;  //PA0 as interrupt test
    GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
    GPIO_InitStruct.Pull = GPIO_PULLDOWN;
    GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
    HAL_NVIC_SetPriority(EXTI0_IRQn, 0, 1);
    while (1) {
        printf("loop%d\r\n", count1);

Comment on this question

3 Answers

1 year, 9 months ago.

I have completely THE SAME PROBLEM with my NUCLEO-F767ZI board. I hope somebody will answer here.

Regards, Ales Zupanc

Did you get your code working?

posted by Ales Zupanc 04 Sep 2017
1 year, 9 months ago.

This is not mbed code, just pure STM32 HAL. Check mbed's interrupt in API here:

You shall declare count1 volatile.

posted by Mark Peter Vargha 08 Sep 2017
1 year, 9 months ago.


If you want to use pure STM32 HAL in mbed, please see GPIO EXTI example available in STM32CubeF7 package.

BTW why don't you use mbed api for this ?

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