Nucleo blue user button and exti in HAL

sergey2 · ‎2015-02-24

Posted on February 24, 2015 at 16:05

Is it possible to configure external interrupt for blue user button on Nucleo bord (which is PC13) using HAL library?

As given in examples for EXTI_Line0 connected to PA.00 pin:

GPIO_InitTypeDef GPIO_InitStructure;

__HAL_RCC_GPIOA_CLK_ENABLE();

GPIO_InitStructure.Mode = GPIO_MODE_IT_RISING;

GPIO_InitStructure.Pull = GPIO_NOPULL;

GPIO_InitStructure.Pin = GPIO_PIN_0;

HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);

HAL_NVIC_SetPriority(EXTI0_IRQn, 2, 0);

HAL_NVIC_EnableIRQ(EXTI0_IRQn);

Theoretically for PC13 it should look like:

GPIO_InitTypeDef GPIO_InitStructure;

__HAL_RCC_GPIOC_CLK_ENABLE();

GPIO_InitStructure.Mode = GPIO_MODE_IT_RISING;

GPIO_InitStructure.Pull = GPIO_NOPULL;

GPIO_InitStructure.Pin = GPIO_PIN_13;

HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);

HAL_NVIC_SetPriority(EXTI13_IRQn, 2, 0);

HAL_NVIC_EnableIRQ(EXTI13_IRQn);

But EXTI13 doesn't exist in HAL library. Any solution?

waclawek.jan · ‎2015-02-24

Posted on February 24, 2015 at 16:15

> But EXTI13 doesn't exist in HAL library. Any solution?

>

Yes: read the manual.

[STM32Cube]\Repository\STM32Cube_FW_F4_V1.4.0\Drivers\BSP\STM32F4xx-Nucleo\stm32f4xx_nucleo.h :

/**

* @brief Key push-button

*/

#define KEY_BUTTON_PIN GPIO_PIN_13

#define KEY_BUTTON_GPIO_PORT GPIOC

#define KEY_BUTTON_GPIO_CLK_ENABLE() __GPIOC_CLK_ENABLE()

#define KEY_BUTTON_GPIO_CLK_DISABLE() __GPIOC_CLK_DISABLE()

#define KEY_BUTTON_EXTI_IRQn EXTI15_10_IRQn

sergey2 · ‎2015-02-24

Posted on February 24, 2015 at 19:57

Thank you!

sergey2 · ‎2015-02-26

Posted on February 26, 2015 at 14:29

To help someone a lammer like me, that's how I did it:

void MX_GPIO_Init(void)

{

GPIO_InitTypeDef GPIO_InitStruct;

/* GPIO Ports Clock Enable */

__GPIOC_CLK_ENABLE();

__GPIOA_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);

/*Configure GPIO pin : PA5 */

GPIO_InitStruct.Pin = GPIO_PIN_5;

GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

GPIO_InitStruct.Speed = GPIO_SPEED_LOW;

HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

HAL_NVIC_SetPriority(EXTI15_10_IRQn, 2, 0);

HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);

}

void EXTI15_10_IRQHandler(void)

{

if(__HAL_GPIO_EXTI_GET_IT(GPIO_PIN_13) != RESET)

{

__HAL_GPIO_EXTI_CLEAR_IT(GPIO_PIN_13);

HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_5);

}