Hello,
I am currently working with the STM32H7S78-DK board using STM32CubeIDE for setup. I have connected four external buttons to the following pins: D2 (PF1), D4 (PF2), D7 (PF3), and D8 (PF4) on the board.
I have configured the buttons as external interrupts. However, while I am able to detect button presses in the main loop by polling the GPIO pins, the interrupt does not seem to trigger the HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) function.
Steps I have followed:
- Configured GPIO pins (PF1, PF2, PF3, PF4) as interrupt inputs in STM32CubeMX.
- Enabled the interrupts in the NVIC configuration.
- Implemented the HAL_GPIO_EXTI_Callback function in the code.
- Used GPIO_MODE_IT_RISING for interrupt triggering.
Despite the above configurations, the interrupt Callback is not being invoked when the buttons are pressed.
Here I attached some snapshot of configuration and code i have write.
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2024 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stdio.h"
#include <string.h>
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef huart4;
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
static void MX_GPIO_Init(void);
static void MX_FLASH_Init(void);
static void MX_UART4_Init(void);
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
GPIO_PinState buttonState[4] = {GPIO_PIN_RESET, GPIO_PIN_RESET, GPIO_PIN_RESET, GPIO_PIN_RESET}; // Variables to store button states
/* USER CODE BEGIN PV */
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
void UART_Print(const char* message);
/* USER CODE END PFP */
/* USER CODE BEGIN 0 */
void UART_Print(const char* message)
{
// Transmit the string data over UART
HAL_UART_Transmit(&huart4, (uint8_t*)message, strlen(message), HAL_MAX_DELAY);
}
/* USER CODE BEGIN 0 */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
if (GPIO_Pin == BUTTON_1_Pin)
{
UART_Print("BUTTON_1 pressed\r\n");
}
else if (GPIO_Pin == BUTTON_2_Pin)
{
UART_Print("BUTTON_2 pressed\r\n");
}
else if (GPIO_Pin == BUTTON_3_Pin)
{
UART_Print("BUTTON_3 pressed\r\n");
}
else if (GPIO_Pin == BUTTON_4_Pin)
{
UART_Print("BUTTON_4 pressed\r\n");
}
HAL_GPIO_TogglePin(GREEN_LED_GPIO_Port, GREEN_LED_Pin);
}
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Update SystemCoreClock variable according to RCC registers values. */
SystemCoreClockUpdate();
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_FLASH_Init();
MX_UART4_Init();
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
buttonState[0] = HAL_GPIO_ReadPin(GPIOF, BUTTON_1_Pin);
buttonState[1] = HAL_GPIO_ReadPin(GPIOF, BUTTON_2_Pin);
buttonState[2] = HAL_GPIO_ReadPin(GPIOF, BUTTON_3_Pin);
buttonState[3] = HAL_GPIO_ReadPin(GPIOF, BUTTON_4_Pin);
// UART_Print("Hello from STM32!\n\r");
// printf("Hello_STM32!\n\r");
// HAL_Delay(1000);
for (int i = 0; i < 4; i++)
{
if (buttonState[i] == GPIO_PIN_SET) // If the button is pressed
{
printf("Buttton %d is pressed\n\r",i);
HAL_GPIO_TogglePin(GREEN_LED_GPIO_Port, GREEN_LED_Pin);
}
}
HAL_Delay(100);
}
/* USER CODE END 3 */
}
/**
* @brief FLASH Initialization Function
* None
* @retval None
*/
static void MX_FLASH_Init(void)
{
/* USER CODE BEGIN FLASH_Init 0 */
/* USER CODE END FLASH_Init 0 */
/* USER CODE BEGIN FLASH_Init 1 */
/* USER CODE END FLASH_Init 1 */
/* USER CODE BEGIN FLASH_Init 2 */
/* USER CODE END FLASH_Init 2 */
}
PUTCHAR_PROTOTYPE
{
/* Place your implementation of fputc here */
/* e.g. write a character to the LPUART1 and Loop until the end of transmission */
HAL_UART_Transmit(&huart4, (uint8_t *)&ch, 1, 0xFFFF);
return ch;
}
/**
* @brief UART4 Initialization Function
* None
* @retval None
*/
static void MX_UART4_Init(void)
{
/* USER CODE BEGIN UART4_Init 0 */
/* USER CODE END UART4_Init 0 */
/* USER CODE BEGIN UART4_Init 1 */
/* USER CODE END UART4_Init 1 */
huart4.Instance = UART4;
huart4.Init.BaudRate = 115200;
huart4.Init.WordLength = UART_WORDLENGTH_8B;
huart4.Init.StopBits = UART_STOPBITS_1;
huart4.Init.Parity = UART_PARITY_NONE;
huart4.Init.Mode = UART_MODE_TX_RX;
huart4.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart4.Init.OverSampling = UART_OVERSAMPLING_16;
huart4.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart4.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart4.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart4) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart4, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart4, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_DisableFifoMode(&huart4) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN UART4_Init 2 */
/* USER CODE END UART4_Init 2 */
}
/**
* @brief GPIO Initialization Function
* None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOO_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GREEN_LED_GPIO_Port, GREEN_LED_Pin, GPIO_PIN_RESET);
/*Configure GPIO pins : BUTTON_3_Pin BUTTON_2_Pin BUTTON_4_Pin BUTTON_1_Pin */
GPIO_InitStruct.Pin = BUTTON_3_Pin|BUTTON_2_Pin|BUTTON_4_Pin|BUTTON_1_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
/*Configure GPIO pin : GREEN_LED_Pin */
GPIO_InitStruct.Pin = GREEN_LED_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GREEN_LED_GPIO_Port, &GPIO_InitStruct);
/* EXTI interrupt init*/
HAL_NVIC_SetPriority(BUTTON_1_EXTI_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(BUTTON_1_EXTI_IRQn);
HAL_NVIC_SetPriority(BUTTON_2_EXTI_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(BUTTON_2_EXTI_IRQn);
HAL_NVIC_SetPriority(BUTTON_3_EXTI_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(BUTTON_3_EXTI_IRQn);
HAL_NVIC_SetPriority(BUTTON_4_EXTI_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(BUTTON_4_EXTI_IRQn);
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* file: pointer to the source file name
* line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
Could you please help me resolve this issue or provide guidance on what might be missing from the configuration?
Thank you for your support.
Best regards,
Mehul
After loading the program, an interrupt is generated without pressing the USER button (PC13) at starting. However, after pressing the button, no interrupt is generated. It is only detected by for loop "Button 4 is pressed".
here is my code,
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2024 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stdio.h"
#include <string.h>
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef huart4;
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
static void MX_GPIO_Init(void);
static void MX_FLASH_Init(void);
static void MX_UART4_Init(void);
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
GPIO_PinState buttonState[5] = {GPIO_PIN_RESET, GPIO_PIN_RESET, GPIO_PIN_RESET, GPIO_PIN_RESET, GPIO_PIN_RESET}; // Variables to store button states
/* USER CODE BEGIN PV */
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
void UART_Print(const char* message);
/* USER CODE END PFP */
/* USER CODE BEGIN 0 */
void UART_Print(const char* message)
{
// Transmit the string data over UART
HAL_UART_Transmit(&huart4, (uint8_t*)message, strlen(message), HAL_MAX_DELAY);
}
/* USER CODE BEGIN 0 */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
if (GPIO_Pin == BUTTON_1_Pin)
{
UART_Print("BUTTON_1 pressed\r\n");
}
else if (GPIO_Pin == BUTTON_2_Pin)
{
UART_Print("BUTTON_2 pressed\r\n");
}
else if (GPIO_Pin == BUTTON_3_Pin)
{
UART_Print("BUTTON_3 pressed\r\n");
}
else if (GPIO_Pin == BUTTON_4_Pin)
{
UART_Print("BUTTON_4 pressed\r\n");
}
else if (GPIO_Pin == BUTTON_5_Pin)
{
UART_Print("BUTTON_5 pressed\r\n");
}
HAL_GPIO_TogglePin(GREEN_LED_GPIO_Port, GREEN_LED_Pin);
}
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Update SystemCoreClock variable according to RCC registers values. */
SystemCoreClockUpdate();
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_FLASH_Init();
MX_UART4_Init();
/* USER CODE BEGIN 2 */
UART_Print("Hello from STM32 from UART4!\n\r");
printf("Hello_STM32 from printf function!\n\r");
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
buttonState[0] = HAL_GPIO_ReadPin(GPIOF, BUTTON_1_Pin);
buttonState[1] = HAL_GPIO_ReadPin(GPIOF, BUTTON_2_Pin);
buttonState[2] = HAL_GPIO_ReadPin(GPIOF, BUTTON_3_Pin);
buttonState[3] = HAL_GPIO_ReadPin(GPIOF, BUTTON_4_Pin);
buttonState[4] = HAL_GPIO_ReadPin(GPIOC, BUTTON_5_Pin);
// UART_Print("Hello from STM32!\n\r");
// printf("Hello_STM32!\n\r");
// HAL_Delay(5000);
for (int i = 0; i < 5; i++)
{
if (buttonState[i] == GPIO_PIN_SET) // If the button is pressed
{
printf("Buttton %d is pressed\n\r",i);
HAL_GPIO_TogglePin(GREEN_LED_GPIO_Port, GREEN_LED_Pin);
}
}
HAL_Delay(100);
}
/* USER CODE END 3 */
}
/**
* @brief FLASH Initialization Function
* None
* @retval None
*/
static void MX_FLASH_Init(void)
{
/* USER CODE BEGIN FLASH_Init 0 */
/* USER CODE END FLASH_Init 0 */
/* USER CODE BEGIN FLASH_Init 1 */
/* USER CODE END FLASH_Init 1 */
/* USER CODE BEGIN FLASH_Init 2 */
/* USER CODE END FLASH_Init 2 */
}
PUTCHAR_PROTOTYPE
{
/* Place your implementation of fputc here */
/* e.g. write a character to the LPUART1 and Loop until the end of transmission */
HAL_UART_Transmit(&huart4, (uint8_t *)&ch, 1, 0xFFFF);
return ch;
}
/**
* @brief UART4 Initialization Function
* None
* @retval None
*/
static void MX_UART4_Init(void)
{
/* USER CODE BEGIN UART4_Init 0 */
/* USER CODE END UART4_Init 0 */
/* USER CODE BEGIN UART4_Init 1 */
/* USER CODE END UART4_Init 1 */
huart4.Instance = UART4;
huart4.Init.BaudRate = 115200;
huart4.Init.WordLength = UART_WORDLENGTH_8B;
huart4.Init.StopBits = UART_STOPBITS_1;
huart4.Init.Parity = UART_PARITY_NONE;
huart4.Init.Mode = UART_MODE_TX_RX;
huart4.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart4.Init.OverSampling = UART_OVERSAMPLING_16;
huart4.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart4.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart4.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart4) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart4, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart4, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_DisableFifoMode(&huart4) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN UART4_Init 2 */
/* USER CODE END UART4_Init 2 */
}
/**
* @brief GPIO Initialization Function
* None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOO_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GREEN_LED_GPIO_Port, GREEN_LED_Pin, GPIO_PIN_RESET);
/*Configure GPIO pins : BUTTON_3_Pin BUTTON_2_Pin BUTTON_4_Pin BUTTON_1_Pin */
GPIO_InitStruct.Pin = BUTTON_3_Pin|BUTTON_2_Pin|BUTTON_4_Pin|BUTTON_1_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
/*Configure GPIO pin : BUTTON_5_Pin */
GPIO_InitStruct.Pin = BUTTON_5_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
HAL_GPIO_Init(BUTTON_5_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : GREEN_LED_Pin */
GPIO_InitStruct.Pin = GREEN_LED_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GREEN_LED_GPIO_Port, &GPIO_InitStruct);
/* EXTI interrupt init*/
HAL_NVIC_SetPriority(BUTTON_1_EXTI_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(BUTTON_1_EXTI_IRQn);
HAL_NVIC_SetPriority(BUTTON_2_EXTI_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(BUTTON_2_EXTI_IRQn);
HAL_NVIC_SetPriority(BUTTON_3_EXTI_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(BUTTON_3_EXTI_IRQn);
HAL_NVIC_SetPriority(BUTTON_4_EXTI_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(BUTTON_4_EXTI_IRQn);
HAL_NVIC_SetPriority(BUTTON_5_EXTI_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(BUTTON_5_EXTI_IRQn);
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* file: pointer to the source file name
* line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
~Mehul
Hello @Mehulrana511 ,
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So please attach the project here using Drag and drop feature.
