STM32F103ZET6 中断按键控制LED
key.h
#ifndef __KEY_H
#define __KEY_H
#include "main.h"
#define KEY_S2_PIN GPIO_PIN_0
#define KEY_S2_PORT GPIOA
#define KEY_S3_PIN GPIO_PIN_4
#define KEY_S3_PORT GPIOE
#define KEY_S4_PIN GPIO_PIN_3
#define KEY_S4_PORT GPIOE
#define KEY_S5_PIN GPIO_PIN_2
#define KEY_S5_PORT GPIOE
extern volatile uint8_t key_s2_flag;
extern volatile uint8_t key_s3_flag;
extern volatile uint8_t key_s4_flag;
extern volatile uint8_t key_s5_flag;
void KEY_EXTI_Callback(uint16_t GPIO_Pin);
#endifkey.c
#include "key.h"
volatile uint8_t key_s2_flag = 0;
volatile uint8_t key_s3_flag = 0;
volatile uint8_t key_s4_flag = 0;
volatile uint8_t key_s5_flag = 0;
// 中断只打标记 → 最灵敏、最稳定
void KEY_EXTI_Callback(uint16_t GPIO_Pin) {
if (GPIO_Pin == KEY_S2_PIN) {
key_s2_flag = 1;
}
if (GPIO_Pin == KEY_S3_PIN) {
key_s3_flag = 1;
}
if (GPIO_Pin == KEY_S4_PIN) {
key_s4_flag = 1;
}
if (GPIO_Pin == KEY_S5_PIN) {
key_s5_flag = 1;
}
}stm32f1xx_it.c
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file stm32f1xx_it.c
* @brief Interrupt Service Routines.
******************************************************************************
* @attention
*
* Copyright (c) 2026 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 "stm32f1xx_it.h"
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN TD */
/* USER CODE END TD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/* External variables --------------------------------------------------------*/
/* USER CODE BEGIN EV */
/* USER CODE END EV */
/******************************************************************************/
/* Cortex-M3 Processor Interruption and Exception Handlers */
/******************************************************************************/
/**
* @brief This function handles Non maskable interrupt.
*/
void NMI_Handler(void) {
/* USER CODE BEGIN NonMaskableInt_IRQn 0 */
/* USER CODE END NonMaskableInt_IRQn 0 */
/* USER CODE BEGIN NonMaskableInt_IRQn 1 */
while (1) {
}
/* USER CODE END NonMaskableInt_IRQn 1 */
}
/**
* @brief This function handles Hard fault interrupt.
*/
void HardFault_Handler(void) {
/* USER CODE BEGIN HardFault_IRQn 0 */
/* USER CODE END HardFault_IRQn 0 */
while (1) {
/* USER CODE BEGIN W1_HardFault_IRQn 0 */
/* USER CODE END W1_HardFault_IRQn 0 */
}
}
/**
* @brief This function handles Memory management fault.
*/
void MemManage_Handler(void) {
/* USER CODE BEGIN MemoryManagement_IRQn 0 */
/* USER CODE END MemoryManagement_IRQn 0 */
while (1) {
/* USER CODE BEGIN W1_MemoryManagement_IRQn 0 */
/* USER CODE END W1_MemoryManagement_IRQn 0 */
}
}
/**
* @brief This function handles Prefetch fault, memory access fault.
*/
void BusFault_Handler(void) {
/* USER CODE BEGIN BusFault_IRQn 0 */
/* USER CODE END BusFault_IRQn 0 */
while (1) {
/* USER CODE BEGIN W1_BusFault_IRQn 0 */
/* USER CODE END W1_BusFault_IRQn 0 */
}
}
/**
* @brief This function handles Undefined instruction or illegal state.
*/
void UsageFault_Handler(void) {
/* USER CODE BEGIN UsageFault_IRQn 0 */
/* USER CODE END UsageFault_IRQn 0 */
while (1) {
/* USER CODE BEGIN W1_UsageFault_IRQn 0 */
/* USER CODE END W1_UsageFault_IRQn 0 */
}
}
/**
* @brief This function handles System service call via SWI instruction.
*/
void SVC_Handler(void) {
/* USER CODE BEGIN SVCall_IRQn 0 */
/* USER CODE END SVCall_IRQn 0 */
/* USER CODE BEGIN SVCall_IRQn 1 */
/* USER CODE END SVCall_IRQn 1 */
}
/**
* @brief This function handles Debug monitor.
*/
void DebugMon_Handler(void) {
/* USER CODE BEGIN DebugMonitor_IRQn 0 */
/* USER CODE END DebugMonitor_IRQn 0 */
/* USER CODE BEGIN DebugMonitor_IRQn 1 */
/* USER CODE END DebugMonitor_IRQn 1 */
}
/**
* @brief This function handles Pendable request for system service.
*/
void PendSV_Handler(void) {
/* USER CODE BEGIN PendSV_IRQn 0 */
/* USER CODE END PendSV_IRQn 0 */
/* USER CODE BEGIN PendSV_IRQn 1 */
/* USER CODE END PendSV_IRQn 1 */
}
/**
* @brief This function handles System tick timer.
*/
void SysTick_Handler(void) {
/* USER CODE BEGIN SysTick_IRQn 0 */
/* USER CODE END SysTick_IRQn 0 */
HAL_IncTick();
/* USER CODE BEGIN SysTick_IRQn 1 */
/* USER CODE END SysTick_IRQn 1 */
}
/******************************************************************************/
/* STM32F1xx Peripheral Interrupt Handlers */
/* Add here the Interrupt Handlers for the used peripherals. */
/* For the available peripheral interrupt handler names, */
/* please refer to the startup file (startup_stm32f1xx.s). */
/******************************************************************************/
/**
* @brief This function handles EXTI line0 interrupt.
*/
void EXTI0_IRQHandler(void) {
/* USER CODE BEGIN EXTI0_IRQn 0 */
/* USER CODE END EXTI0_IRQn 0 */
HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_0);
/* USER CODE BEGIN EXTI0_IRQn 1 */
/* USER CODE END EXTI0_IRQn 1 */
}
/**
* @brief This function handles EXTI line2 interrupt.
*/
void EXTI2_IRQHandler(void) {
/* USER CODE BEGIN EXTI2_IRQn 0 */
/* USER CODE END EXTI2_IRQn 0 */
HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_2);
/* USER CODE BEGIN EXTI2_IRQn 1 */
/* USER CODE END EXTI2_IRQn 1 */
}
/**
* @brief This function handles EXTI line3 interrupt.
*/
void EXTI3_IRQHandler(void) {
/* USER CODE BEGIN EXTI3_IRQn 0 */
/* USER CODE END EXTI3_IRQn 0 */
HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_3);
/* USER CODE BEGIN EXTI3_IRQn 1 */
/* USER CODE END EXTI3_IRQn 1 */
}
/**
* @brief This function handles EXTI line4 interrupt.
*/
void EXTI4_IRQHandler(void) {
/* USER CODE BEGIN EXTI4_IRQn 0 */
/* USER CODE END EXTI4_IRQn 0 */
HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_4);
/* USER CODE BEGIN EXTI4_IRQn 1 */
/* USER CODE END EXTI4_IRQn 1 */
}
/* USER CODE BEGIN 1 */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) { KEY_EXTI_Callback(GPIO_Pin); }
/* USER CODE END 1 */main.c
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2026 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 "tim.h"
#include "usart.h"
#include "gpio.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 ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_TIM1_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
printf("hello world! \r\n");
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1) {
// HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_5);
// HAL_Delay(500);
// S2 → D3
// ========== S2 → D3 ==========
if (key_s2_flag) {
key_s2_flag = 0;
HAL_Delay(20);
if (HAL_GPIO_ReadPin(KEY_S2_PORT, KEY_S2_PIN) == GPIO_PIN_RESET) {
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_5);
}
}
// ========== S3 → D4 ==========
if (key_s3_flag) {
key_s3_flag = 0;
HAL_Delay(20);
if (HAL_GPIO_ReadPin(KEY_S3_PORT, KEY_S3_PIN) == GPIO_PIN_RESET) {
HAL_GPIO_TogglePin(GPIOE, GPIO_PIN_5);
}
}
// ========== S4 → D5 ==========
if (key_s4_flag) {
key_s4_flag = 0;
HAL_Delay(20);
if (HAL_GPIO_ReadPin(KEY_S4_PORT, KEY_S4_PIN) == GPIO_PIN_RESET) {
HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_5);
}
}
if (key_s5_flag) {
key_s5_flag = 0;
HAL_Delay(20);
if (HAL_GPIO_ReadPin(KEY_S5_PORT, KEY_S5_PIN) == GPIO_PIN_SET) {
HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_6);
}
}
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/* 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.
* @param file: pointer to the source file name
* @param 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 */
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