档案室建设网站,名贵中药材初加工平台,中小企业电商网站建设的重要性,jrs直播(无插件)直播极速体育360看门狗这里我就不多介绍了#xff0c;能搜到这篇文章说明你了解
总之就是一个单片机重启程序#xff0c;设定好超时时间#xff0c;在超时时间内没有喂狗#xff0c;单片机就会复位
主要应用在单片机异常重启方面#xff0c;比如程序跑飞#xff08;注意程序跑飞时你就…看门狗这里我就不多介绍了能搜到这篇文章说明你了解
总之就是一个单片机重启程序设定好超时时间在超时时间内没有喂狗单片机就会复位
主要应用在单片机异常重启方面比如程序跑飞注意程序跑飞时你就没有喂狗然后就会重启单片机注意看门狗独立于程序之外看门狗不会随着程序跑飞
1cubeMX配置
1.打开看门狗配置看门狗相关参数 我设置的超时时间为10s
超时时间预分频值*重载值/时钟频率
10s(256*1250)/32000
至于为什么是这样计算
IWDG时钟32000经过分频后为32000/256125 也就是每秒计数125次
重载值reload value1250表示计数1250次内不喂狗就重启
所以超时时间1250/12510s
至于那个window value 有些芯片是没有这个值的大家可以去了解了解WWDG窗口看门狗也就是只能在窗口期喂狗
窗口期window value/reload value *超时时间~超时时间
在上面例子 窗口期600/1250*10~10s
也就是4.8s~10s才能喂狗
不喂狗或者在4.8s之前喂狗都会复位单片机
我用的是stm32l471rgt6芯片看门狗时钟频率32kHz 2,打开串口1可选
为了调试方便 3.生成代码基本配置默认你们都会
勾选生成.c .h文件 我用的是clion开发所以生成是STM32CubeIDE 用keil的就MDK就行 2.代码编写
就写喂狗函数就好了初始化cubemx已经写好了
HAL_IWDG_Init(hiwdg)//初始化
HAL_IWDG_Refresh(hiwdg);//喂狗
main.c代码
/* 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 can.h
#include iwdg.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_CAN1_Init();MX_USART1_UART_Init();MX_USART2_UART_Init();MX_IWDG_Init();/* USER CODE BEGIN 2 */uint8_t rrr[6]program begin;HAL_UART_Transmit(huart1, rrr, 13, 1000);uint32_t time HAL_GetTick();/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE *//* USER CODE BEGIN 3 *///每7秒喂狗 10s内不喂狗会重启if(HAL_GetTick()-time7000){HAL_UART_Transmit(huart1, feed dog\r\n, 10, 1000);HAL_IWDG_Refresh(hiwdg);timeHAL_GetTick();}HAL_UART_Transmit(huart1, loop\r\n, 6, 1000);HAL_Delay(1000);}/* USER CODE END 3 */
}/*** brief System Clock Configuration* retval None*/
void SystemClock_Config(void)
{RCC_OscInitTypeDef RCC_OscInitStruct {0};RCC_ClkInitTypeDef RCC_ClkInitStruct {0};/** Configure the main internal regulator output voltage*/if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) ! HAL_OK){Error_Handler();}/** Initializes the RCC Oscillators according to the specified parameters* in the RCC_OscInitTypeDef structure.*/RCC_OscInitStruct.OscillatorType RCC_OSCILLATORTYPE_LSI|RCC_OSCILLATORTYPE_HSE;RCC_OscInitStruct.HSEState RCC_HSE_ON;RCC_OscInitStruct.LSIState RCC_LSI_ON;RCC_OscInitStruct.PLL.PLLState RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLM 1;RCC_OscInitStruct.PLL.PLLN 20;RCC_OscInitStruct.PLL.PLLP RCC_PLLP_DIV7;RCC_OscInitStruct.PLL.PLLQ RCC_PLLQ_DIV2;RCC_OscInitStruct.PLL.PLLR RCC_PLLR_DIV2;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_4) ! 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 */效果如下
