65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*
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*********************************************************************************************************
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* IAR Development Kits
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* on the
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*
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* M451
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*
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* Filename : wdt_reset.c
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* Version : V1.00
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* Programmer(s) : Qian Xianghong
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*********************************************************************************************************
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*/
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/*
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*********************************************************************************************************
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* INCLUDE FILES
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*********************************************************************************************************
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*/
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#include "includes.h"
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IWDG_HandleTypeDef hiwdg;
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void Watchdog_Init()
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{
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// 看门狗时钟为32K，超时时间为4095/(32K/256)=32秒
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hiwdg.Instance = IWDG;
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hiwdg.Init.Prescaler = IWDG_PRESCALER_256;
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hiwdg.Init.Window = 4095;
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hiwdg.Init.Reload = 4095;
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if (HAL_IWDG_Init(&hiwdg) != HAL_OK)
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{
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Error_Handler();
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}
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}
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void Watchdog_Open()
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{
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FLASH_OBProgramInitTypeDef OptionsBytesStruct;
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// 检查并设置OptionBytes的IWDG_STOP标志为：Stop模式下IWDG不工作
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HAL_FLASHEx_OBGetConfig(&OptionsBytesStruct);
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printf("\r\nIWDG_STOP config: %08X\r\n", OptionsBytesStruct.USERConfig & 0x00020000);
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if(OptionsBytesStruct.USERConfig & 0x00020000)
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{
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HAL_FLASH_Unlock();
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__HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_OPTVERR);
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HAL_FLASH_OB_Unlock();
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OptionsBytesStruct.OptionType = OPTIONBYTE_USER;
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OptionsBytesStruct.USERType = OB_USER_IWDG_STOP;
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OptionsBytesStruct.USERConfig &= (~0x00020000);
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HAL_FLASHEx_OBProgram(&OptionsBytesStruct);
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HAL_FLASH_OB_Launch();
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}
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}
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void Watchdog_Feed()
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{
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HAL_IWDG_Refresh(&hiwdg);
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}
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