目录
项目需求
项目框图
硬件清单
振动传感器介绍及实战
振动传感器介绍
振动传感器编程实现
继电器介绍及实战
继电器工作原理
433M无线发射接收模块介绍及实战
433M无线发射接收模块介绍
编辑
433M编程实现
项目设计及实现
编程实现
//重写中断服务函数,如果检测到EXTI中断请求,则进入此函数
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{//一根中断线上接有多个中断源,判断中断请求是否来自PA4if(GPIO_Pin == GPIO_PIN_4){//如果检测到PA4被拉低if(HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_4) == GPIO_PIN_RESET){//则点亮LED1HAL_GPIO_WritePin(GPIOB, GPIO_PIN_8, GPIO_PIN_RESET);//延时1秒HAL_Delay(1000);//关闭LED1HAL_GPIO_WritePin(GPIOB, GPIO_PIN_8, GPIO_PIN_SET);}else{//未检测到PA4被拉低,则关闭LED1HAL_GPIO_WritePin(GPIOB, GPIO_PIN_8, GPIO_PIN_SET);}}
}
如果直接在中断服务函数里调用 HAL_Delay 函数,则会造成系统卡死。 原因:程序初始化时默认把滴答定时器的中断优先级设为最低,其它中断源很容易打断它导致卡 死。 解决:在 main 函数里使用以下函数提高滴答定时器的中断优先级(提升至0): HAL_NVIC_SetPriority(SysTick_IRQn,0,0);
并且将 EXTI4 的中断优先级设置比滴答定时器的中断优先级高,比如 2 。
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{switch(GPIO_Pin){case GPIO_PIN_5:if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_5)==GPIO_PIN_SET){//则点亮LED1HAL_GPIO_WritePin(GPIOB,GPIO_PIN_8,GPIO_PIN_RESET);HAL_Delay(1000);HAL_GPIO_WritePin(GPIOB,GPIO_PIN_8,GPIO_PIN_SET);}else{//如果未检测到PA5,则关闭LED1HAL_GPIO_WritePin(GPIOB, GPIO_PIN_8, GPIO_PIN_SET);}break;case GPIO_PIN_6:if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_6)==GPIO_PIN_SET){//则点亮LED2HAL_GPIO_WritePin(GPIOB,GPIO_PIN_9,GPIO_PIN_RESET);HAL_Delay(1000);HAL_GPIO_WritePin(GPIOB,GPIO_PIN_9,GPIO_PIN_SET);}else{//如果未检测到PA6,则关闭LED2HAL_GPIO_WritePin(GPIOB, GPIO_PIN_9, GPIO_PIN_SET);}break;}}
/* USER CODE BEGIN Header */
/********************************************************************************* @file : main.c* @brief : Main program body******************************************************************************* @attention** Copyright (c) 2023 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 "gpio.h"
#define J_OFF 0
#define J_ON 1
/* 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 */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{static int mark=J_OFF;switch(GPIO_Pin){case GPIO_PIN_4:if(mark==J_ON && HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_5)==GPIO_PIN_RESET){HAL_GPIO_WritePin(GPIOB,GPIO_PIN_7,GPIO_PIN_RESET);}break;case GPIO_PIN_5:if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_5)==GPIO_PIN_SET){HAL_GPIO_WritePin(GPIOB,GPIO_PIN_7,GPIO_PIN_RESET);HAL_Delay(2000);HAL_GPIO_WritePin(GPIOB,GPIO_PIN_7,GPIO_PIN_SET);mark=J_ON;}break;case GPIO_PIN_6:if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_6)==GPIO_PIN_SET){HAL_GPIO_WritePin(GPIOB,GPIO_PIN_7,GPIO_PIN_RESET);HAL_Delay(1000);HAL_GPIO_WritePin(GPIOB,GPIO_PIN_7,GPIO_PIN_SET);mark=J_OFF;}break;}}
/* 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();/* USER CODE BEGIN 2 */HAL_NVIC_SetPriority(SysTick_IRQn,0,0);/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* 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_MUL2;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_DIV1;RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != 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 */