Esempio n. 1
1
/** 
 * @brief Initialize the watchdog timer for a specified timeout
 *
 * It is important to note that this function returns the achieved timeout 
 * for this hardware.  For hardware independence this should be checked when
 * scheduling updates.  Other hardware dependent details may need to be 
 * considered such as a window time which sets a minimum update time, 
 * and this function should return a recommended delay for clearing.  
 *
 * For the STM32 nominal clock rate is 32 khz, but for the maximum clock rate of
 * 60 khz and a prescaler of 4 yields a clock rate of 15 khz.  The delay that is
 * set in the watchdog assumes the nominal clock rate, but the delay for FreeRTOS
 * to use is 75% of the minimal delay.
 *
 * @returns Maximum recommended delay between updates based on PIOS_WATCHDOG_TIMEOUT constant
 */
uint16_t PIOS_WDG_Init()
{
	uint16_t delay = ((uint32_t) PIOS_WATCHDOG_TIMEOUT * 60) / 16;
	if (delay > 0x0fff)
		delay = 0x0fff;
#if defined(PIOS_INCLUDE_WDG)
	DBGMCU_Config(DBGMCU_IWDG_STOP, ENABLE);	// make the watchdog stop counting in debug mode
	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
	IWDG_SetPrescaler(IWDG_Prescaler_16);
	IWDG_SetReload(delay);
	IWDG_ReloadCounter();
	IWDG_Enable();

	// watchdog flags now stored in backup registers
	PWR_BackupAccessCmd(ENABLE);

	wdg_configuration.bootup_flags = RTC_ReadBackupRegister(PIOS_WDG_REGISTER);

	/*
	 * Start from an empty set of registered flags so previous boots
	 * can't influence the current one
	 */
	RTC_WriteBackupRegister(PIOS_WDG_REGISTER, 0);
#endif
	return delay;
}
Esempio n. 2
0
/******************************************************************************
  * @brief  看门狗初始化
  * @param 	tm:看门狗时间,0.5s / 1s / 2s / 3s /默认最长3.542秒 
  * @retval None 
******************************************************************************/
void	WDT_Init(TYPE_WDTtime tm)
{
	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);	//关闭IWDG_PR和IWDG_RLR 的写保护
	if(tm == WDT_S5)IWDG_SetReload(578); 			//设置重装载值
	else if(tm == WDT_1S)IWDG_SetReload(1158);
	else if(tm == WDT_2S)IWDG_SetReload(2315);
	else if(tm == WDT_3S)IWDG_SetReload(3473);
	else IWDG_SetReload(0xFFF);
	IWDG_SetPrescaler(IWDG_Prescaler_32); 			//设置预分频系数为32
	//IWDG_ReloadCounter();
	IWDG_Enable(); //使能看门狗
} 
Esempio n. 3
0
void InitWatchdog(void){
	
	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
	IWDG_SetPrescaler(IWDG_Prescaler_4); 			
	IWDG_SetReload(0xFFF); 
	IWDG_Enable();
}
Esempio n. 4
0
int LCDPANELProcessInit(void)
{
	rt_thread_t init_thread;
    rt_err_t result = RT_EOK;

	// 创建消息队列,分配队列存储空间
    result = rt_mq_init(&rx_mq, "mqt", &msg_pool[0], 32 - sizeof(void*), sizeof(msg_pool), RT_IPC_FLAG_FIFO);
   
    if (result != RT_EOK) 
    { 
        rt_kprintf("init message queue failed.\n"); 
        return result; 
    }

	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);			// Enable write access to IWDG_PR and IWDG_RLR registers
	IWDG_SetPrescaler(IWDG_Prescaler_32);					// IWDG counter clock: 40KHz(LSI) / 32 = 1.25 KHz 
	IWDG_SetReload(1250);									// Set counter reload value to 1250 
	IWDG_ReloadCounter();									// Reload IWDG counter 
//	IWDG_Enable();											// Enable IWDG (the LSI oscillator will be enabled by hardware) 

	init_thread = rt_thread_create( "lcdpanel",
									LCDPANELProcess_thread_entry,
									RT_NULL,
									2048,10,10);

	if( init_thread != RT_NULL )
	{
		rt_thread_startup(init_thread);
	}

	return 0;
}
void PhotonWdgs::begin(bool _enableWwdg,bool _enableIwdg,unsigned long _timeout, TIMid id)
{
    if(!_enableWwdg && !_enableIwdg) {
        // nothing to do ...
        return;
    }
    PhotonWdgs::_aliveCount = 0;
    PhotonWdgs::_timeoutval = _timeout / 10;

    RCC_LSICmd(ENABLE); //LSI is needed for Watchdogs

    PhotonWdgs::_wdgTimer.begin(PhotonWdgs::_tickleWDGs, 20, hmSec, id);
    // OTA updates won't work with watchdog enabled
    System.disableUpdates();
    PhotonWdgs::_wwdgRunning = _enableWwdg;
    if(_enableWwdg) {
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_WWDG, ENABLE);
        WWDG_SetPrescaler(WWDG_Prescaler_8);
        WWDG_SetWindowValue(0x7F);
        WWDG_Enable(0x7F);
    }
    PhotonWdgs::_iwdgRunning = _enableIwdg;
    if(_enableIwdg) {
        IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
        IWDG_SetPrescaler(IWDG_Prescaler_256);
        IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
        IWDG_SetReload(0xFFF);
        IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
        IWDG_Enable();
    }
}
Esempio n. 6
0
OSStatus PlatformWDGInitialize( uint32_t timeout_ms )
{
  plat_log_trace();
  OSStatus err = kNoErr;
// PLATFORM_TO_DO

  /* Get the LSI frequency:  TIM5 is used to measure the LSI frequency */
  LsiFreq = GetLSIFrequency();
   
  IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);

  /* IWDG counter clock: LSI/32 */
  IWDG_SetPrescaler(IWDG_Prescaler_128);

  /* Set counter reload value to obtain 250ms IWDG TimeOut.
     Counter Reload Value = 250ms/IWDG counter clock period
                          = 250ms / (LSI/32)
                          = 0.25s / (LsiFreq/32)
                          = LsiFreq/(32 * 4)
                          = LsiFreq/128
   */
  IWDG_SetReload((uint16_t)(LsiFreq*timeout_ms/128000));

  /* Reload IWDG counter */
  IWDG_ReloadCounter();

  /* Enable IWDG (the LSI oscillator will be enabled by hardware) */
  IWDG_Enable();

  return err;
}
Esempio n. 7
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void WatchDogInit(void)
{    
  /* IWDG timeout equal to 250 ms (the timeout may varies due to LSI frequency
     dispersion) */
  /* Enable write access to IWDG_PR and IWDG_RLR registers */
  IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);

  /* IWDG counter clock: LSI/32 */
    /*   prescaler            min/ms    max/ms
         4                        0.1             409.6
         8                        0.2             819.2
         16                      0.4             1638.4
         32                      0.8              3276.8
         64                      1.6              6553.5
         128                    3.2              13107.2
         256                    6.4              26214.4   
  */
  IWDG_SetPrescaler(IWDG_Prescaler_16);

  /* Set counter reload value to obtain 250ms IWDG TimeOut.
     Counter Reload Value = 250ms/IWDG counter clock period
                          = 250ms / (LSI/32)
                          = 0.25s / (LsiFreq/32)
                          = LsiFreq/(32 * 4)
                          = LsiFreq/128
   */
  IWDG_SetReload(0X4AAA);//(LsiFreq/128);

  /* Reload IWDG counter */
  IWDG_ReloadCounter();

  /* Enable IWDG (the LSI oscillator will be enabled by hardware) */
  IWDG_Enable();
}
Esempio n. 8
0
/**
 * @brief   iwdg config
 */
void IWDG_Configuration(void)
{
	/* Enable write access to IWDG_PR and IWDG_RLR registers */
	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);

	/* IWDG counter clock: LSI/32 */
	IWDG_SetPrescaler(IWDG_Prescaler_32);

	/* Set counter reload value to obtain 250ms IWDG TimeOut.
	 Counter Reload Value = 250ms/IWDG counter clock period
						  = 250ms / (LSI/32)
						  = 0.25s / (LsiFreq/32)
						  = LsiFreq/(32 * 4)
						  = LsiFreq/128
	*/
//	IWDG_SetReload(LSI_FREQ / 128);

	// iwdg period is 1000mS
	IWDG_SetReload(LSI_FREQ / 32);

	/* Reload IWDG counter */
	IWDG_ReloadCounter();

	/* Enable IWDG (the LSI oscillator will be enabled by hardware) */
	IWDG_Enable();

}
Esempio n. 9
0
/**
 * Initializes the boards watchdog timer. If the behavior of the board is changed, this method may need to be
 * modified if the main control loop is changed.
 *
 * @param none
 * @retval none
 */
void Watchdog_Init(void) {
	/* Get the LSI frequency from TIM5 */
	LsiFreq = GetLSIFrequency();
	printf("LSI Frequency: %" PRIu32 "\n", LsiFreq);

	/* Enable write access to IWDG_PR and IWDG_RLR registers */
	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);

	/* IWDG counter clock: LSI/32 */
	IWDG_SetPrescaler(IWDG_Prescaler_64);

	/* Set counter reload value to obtain 1s IWDG TimeOut.
	     IWDG counter clock Frequency = LsiFreq/32
	     Counter Reload Value = 250ms/IWDG counter clock period
	                          = 0.25s / (32/LsiFreq)
	                          = LsiFreq/(32 * 4)
	                          = LsiFreq/128
	 */
	IWDG_SetReload(LsiFreq/16);

	/* Reload IWDG counter */
	IWDG_ReloadCounter();

	/* Enable IWDG (the LSI oscillator will be enabled by hardware) */
	IWDG_Enable();
}
Esempio n. 10
0
//==============================================================================
// 看門狗設定 : 用來當RESET 用
//==============================================================================
void IWDG_Config(unsigned char timeout)
{
  /* IWDG timeout equal to 250 ms (the timeout may varies due to LSI frequency
  dispersion) */
  /* Enable write access to IWDG_PR and IWDG_RLR registers */
  IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
  
  /* IWDG counter clock: LSI/32 */
  //IWDG_SetPrescaler(IWDG_Prescaler_32);
  /* IWDG counter clock: LSI/256 */
  IWDG_SetPrescaler(IWDG_Prescaler_256);
  
  /* Set counter reload value to obtain 250ms IWDG TimeOut.
  Counter Reload Value = 250ms/IWDG counter clock period
  = 250ms / (LSI/32)
  = 0.25s / (LsiFreq/32)
  = LsiFreq/(32 * 4)
  = LsiFreq/128
  */
  // IWDG_SetReload(LsiFreq/128);
  
  IWDG_SetReload(timeout);
  
  /* Reload IWDG counter */
  IWDG_ReloadCounter();
  
  /* Enable IWDG (the LSI oscillator will be enabled by hardware) */
  IWDG_Enable();
}
Esempio n. 11
0
File: main.c Progetto: thaigiang/VMS
/**
  * @brief   Main program
  * @param  None
  * @retval None
  */
int main(void)
{	
	RCC_Configuration();
	GPIO_Configuration();
	USART_Configuration();	
	SysTick_Config(SystemCoreClock/10);
	// Enable the LSI OSC 
 	RCC_LSICmd(ENABLE);
	// Wait till LSI is ready 
	while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET) {};
	
 	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
	// IWDG counter clock: LSI/256 
	IWDG_SetPrescaler(IWDG_Prescaler_256);
	IWDG_SetReload(0x0FFF);
	// Reload IWDG counter 
	IWDG_ReloadCounter();
	// Enable IWDG (the LSI oscillator will be enabled by hardware) 
	IWDG_Enable(); 
	
	// Write memmory
	FLASH_UnlockBank1();
	FLASH_ErasePage(FLAG_ADDR);
	FLASH_ProgramWord(FLAG_ADDR,(u32)FLAG_UPDATED);
	FLASH_LockBank1();
	
	updateFW_control();
}
Esempio n. 12
0
void WDT_init(void)
{
	IWDG_WriteAccessEnable();
	IWDG_SetPrescaler(IWDG_Prescaler_256);
	IWDG_SetReload(0xFFF);
	IWDG_Enable();
	IWDG_ReloadCounter();
}
Esempio n. 13
0
void watchdog_config(void)
{
	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
	IWDG_SetReload(0x80);
	IWDG_SetPrescaler(IWDG_Prescaler_32);
	IWDG_Enable();
	tim13_config();
}
 //*******************初始化独立看门狗*************************************
//函数定义: void IWDG_Configuration(void) 
//描    述:初始化独立看门狗
//入口参数:无
//出口参数:无
//备    注:分频因子=4*2^prer.但最大值只能是256!时间计算(大概):Tout=40K/((4*2^prer)*rlr)值	 2S超时
//Editor:liuqh 2013-1-16  Company: BXXJS
//*******************************************************************
static void IWDG_Configuration(void) 
{
	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);//使能对IWDG->PR和IWDG->RLR的写
	IWDG_SetPrescaler(IWDG_Prescaler_64);//64分频
	IWDG_SetReload(1300);
	IWDG_ReloadCounter();
	IWDG_Enable();		
}
Esempio n. 15
0
/**
 * IWDG_Configuration
 */
static void IWDG_Configuration(void) 
{
    IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
    IWDG_SetPrescaler(IWDG_Prescaler_64);
    IWDG_SetReload(1875);
    IWDG_ReloadCounter();
    IWDG_Enable();
}
Esempio n. 16
0
void IWDG_Init()
{
  IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
	IWDG_SetPrescaler(IWDG_Prescaler_256);
	IWDG_SetReload(781);
	IWDG_ReloadCounter();
	IWDG_Enable();
}
Esempio n. 17
0
/*******************************************************************************
函 数 名:void IWDG_Init(void)
功能描述:看门狗初始化						
入口参数:							
返回参数:
创建时间: 2011.6.24
********************************************************************************/
void IWDG_Init(void)
{
    IWDG_WriteAccessCmd( IWDG_WriteAccess_Enable );
    IWDG_SetPrescaler( IWDG_Prescaler_64);	//最小
    IWDG_SetReload( 0x138);		//40KHz内部时钟 (1/40000 * 64 * 0x138 = 0.5s)
    IWDG_WriteAccessCmd( IWDG_WriteAccess_Disable );
    IWDG_Enable();
    IWDG_ReloadCounter();
}
Esempio n. 18
0
void IWDG_Init(void)
{
  //konfigurowanie watchdoga IWDG
IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);    // Zezwolenie na zapis rejestrów IWDG
IWDG_SetPrescaler(IWDG_Prescaler_64);             // IWDG taktowany zegarem: 37kHz/64 = 0.578kHz
IWDG_SetReload(0xFFF);                        // Przepelnienie IWDG po okolo 7s   
IWDG_ReloadCounter();                           // Przeladowanie IWDG
IWDG_Enable();                                  // Wlaczenie IWDG i LSI
}
Esempio n. 19
0
/**
  * @brief  初始化独立看门狗
  * @param  prer : IWDG预分频值 ,  rlr 重装载值
  * @retval None
  */
void IWDG_Init(u8 prer, u16 rlr)
{
    IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);  //使能对寄存器IWDG_PR和IWDG_RLR的写操作
    IWDG_SetPrescaler(prer);  //设置IWDG预分频值:设置IWDG预分频值为64
    IWDG_SetReload(rlr);  //设置IWDG重装载值
    IWDG_ReloadCounter();  //按照IWDG重装载寄存器的值重装载IWDG计数器
    IWDG_Enable();  //使能IWDG
    IWDG_Feed();
}
Esempio n. 20
0
File: main.c Progetto: ZiSo89/STM32
/*******************************************************************************
* Function Name  : IWDG_Configuration
* Description    : ?/AA?·AaOA
* Input          : None
* Output         : None
* Return         : None
* Attention		 : None
*******************************************************************************/
void IWDG_Configuration(void)
{
  IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable); 	/* ?/Ee0x5555,OAOUOE?i?·?·?A/????/Ee?¦AU */
  IWDG_SetPrescaler(IWDG_Prescaler_256);            /* AU²?µIEUE±OO256·O?µ 40K/256=156HZ(6.4ms) */ 
  /* ?/AA?·¶¨E±??Oc³oE±?a */
  IWDG_SetReload(781);							    /* I??·E±?a 5s/6.4MS=781 .??Oa²»AU/oOU0xfff*/
  IWDG_ReloadCounter();								/* I??·*/
  IWDG_Enable(); 									/* E?AU?/AA?·*/
}
Esempio n. 21
0
/*!
*	@brief
*	@note
		LSI clock between 30 and 60kHz
		WDTimeOut = 75 ms
		Prescaler = 64
		Tlsi = 1 / (LSI / prescaler) = 1 / (60kHz / 64) = 0.001067
		ReloadValue = WDTimeOut / Tlsi = 75ms / 0.001067 = 70

		this equals the minimum WDG-timeout!
		max. timeout occurs when LSI is @30 kHz (minimum): 2 * 75 ms = 150 ms
*/
void WatchDogInit( void )
{
	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);

	IWDG_SetPrescaler( IWDG_Prescaler_64 );
	IWDG_SetReload(70);// max value 4095 (0xFFF)

	IWDG_Enable();
	IWDG_ReloadCounter();
}
Esempio n. 22
0
void	Watchdog_init(int t) {
#ifdef	__PFM6__
			IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
			IWDG_SetPrescaler(IWDG_Prescaler_32);
			IWDG_SetReload(t);
			while(IWDG_GetFlagStatus(IWDG_FLAG_RVU) == RESET);
			IWDG_ReloadCounter();
			IWDG_Enable();
			IWDG_WriteAccessCmd(IWDG_WriteAccess_Disable);
#endif
}
Esempio n. 23
0
/*******************************************************************************
* Function Name  : stm32_WdgInit
* Description    : ƬÄÚ¶ÀÁ¢¿´ÃŹ·ÅäÖÃ
* Input 		 : None
* Output		 : None
* Return		 : None
*******************************************************************************/
void arch_WdgInit()
{

	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
	/* IWDG counter clock: 30-60KHz(LSI) / 64 = 469-937.5Hz */
	IWDG_SetPrescaler(IWDG_Prescaler_64);
	/* Set counter reload value to 1800 */
	IWDG_SetReload(1800);
	/* Enable IWDG (the LSI oscillator will be enabled by hardware) */
	IWDG_Enable();
}
Esempio n. 24
0
int main(void)
{
    //RCC_ClocksTypeDef Clocks;
    uint8_t pos = 128+64;
     
    SystemInit();
    SystemCoreClockUpdate(); //update the system clock variable
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
    GPIO_Init(GPIOA, &GPIOA_InitStruct);
     
    timercounter = 0;
    //set systick to 1 every 1uS 
    SysTick_Config(SystemCoreClock/8);
    initUSART1();
    GPIO_SetBits(GPIOA, GPIO_Pin_10);
   
    //initialize the watchdog
    
    IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
    IWDG_SetPrescaler(0x00);
    //while(IWDG_GetFlagStatus(IWDG_FLAG_PVU)==SET);
    IWDG_SetReload(0xFFFF);
    //while(IWDG_GetFlagStatus(IWDG_FLAG_RVU)==SET);
    //IWDG_SetWindowValue(0x0000);
    //while(IWDG_GetFlagStatus(IWDG_FLAG_PVU)==SET);
    IWDG_ReloadCounter();
    IWDG_Enable();

    static BitAction toggle = Bit_SET;
    
    int i =0;
   
    //init the u8g library
    u8g_InitComFn(&u8g,  &u8g_dev_ssd1306_128x64_i2c, u8g_com_hw_i2c_fn);
    u8g_SetDefaultForegroundColor(&u8g);
           
    while(1){
        u8g_FirstPage(&u8g);
        do
        {
          IWDG_ReloadCounter();
          draw(pos);
        } while ( u8g_NextPage(&u8g) );
         
         /* refresh screen after some delay */
         ///* update position */
        if(pos < 128+128){  
            pos--;
        }else
        { pos = 128+128;
        }
    }
}
void driv_wdg_init(void)
{
	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);//启动寄存器读写

	IWDG_SetPrescaler(IWDG_Prescaler_256);//40K时钟256分频

	IWDG_SetReload(0xfff);                 //计数器数值,大概26秒

	//IWDG_ReloadCounter();             //重启计数器

	//IWDG_Enable();                       //启动看门狗
}
Esempio n. 26
0
/*
*********************************************************************************************************
*	函 数 名: bsp_InitIwdg
*	功能说明: 独立看门狗时间配置函数
*	形    参:IWDGTime: 0 ---- 0x0FFF
*			  独立看门狗时间设置,单位为ms,IWDGTime = 1000 大约就是一秒的
*             时间,这里没有结合TIM5测得实际LSI频率,只是为了操作方便取了
*             一个估计值超过IWDGTime不进行喂狗的话系统将会复位。
*			  LSI = 34000左右
*	返 回 值: 无		        
*********************************************************************************************************
*/
void bsp_iwdg_init(unsigned int IWDGTime)
{
		
	/* 检测系统是否从独立看门狗复位中恢复 */
	if (RCC_GetFlagStatus(RCC_FLAG_IWDGRST) != RESET)
	{		
		/* 清除复位标志 */
		RCC_ClearFlag();
	}
	else
	{
		/* 标志没有设置 */

	}
	
#if 1
	/* 通过TIM5输入捕获得到LSI频率 */
	LsiFreq = GetLSIFrequency();
#else
	/* 使能LSI */
	RCC_LSICmd(ENABLE);
	
	/* 等待直到LSI就绪 */
	while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
	{}
	
    /* */		
	LsiFreq = 32000;
#endif
	
	/* 写入0x5555表示允许访问IWDG_PR 和IWDG_RLR寄存器 */
	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
	
	/*  LSI/32 分频*/
	IWDG_SetPrescaler(IWDG_Prescaler_256);
	
	/*特别注意,由于这里_ulIWDGTime的最小单位是ms, 所以这里重装计数的
	  计数时 需要除以1000
	 Counter Reload Value = (IWDGTime / 1000) /(1 / IWDG counter clock period)
	                      = (IWDGTime / 1000) / (32/LSI)
	                      = (IWDGTime / 1000) / (32/LsiFreq)
	                      = LsiFreq * IWDGTime / 32000
	 实际测试LsiFreq = 34000,所以这里取1的时候 大概就是1ms 
	*/
	IWDG_SetReload(IWDGTime);
	
	/* 重载IWDG计数 */
	IWDG_ReloadCounter();
	
	/* 使能 IWDG (LSI oscillator 由硬件使能) */
	IWDG_Enable();		
}
Esempio n. 27
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/************************************************ 
* 函  数: IWDG_Init(u8, u16)
* 功  能: 初始化独立看门狗, 预分频数 = 4*2^prescaler, 最大256;
*         看门狗复位大概时间: time_out = (4*2^prescaler)*reload/40(ms)
*
* 参  数: prescaler - 分频因子(0~7), 仅低3位有效
*         reload - 重装载寄存器值, 低11位有效
*
* 返回值: 无, 调用示例: IWDG_Init(4, 62); // 独立看门狗, 预分频数64,重装载值62,溢出时间约为100ms 
*************************************************/
void IWDG_Init(u8 prescaler, u16 reload)
{
  // 使能对寄存器IWDG_PR和IWDG_RLR的写操作
  IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
  // 设置IWDG预分频数
  IWDG_SetPrescaler(prescaler);
  // 设置IWDG重新装载值
  IWDG_SetReload(reload);
  // 根据IWDG重新装载寄存器值重新装载IWDG计数器
  IWDG_ReloadCounter();
  // 使能IWDG
  IWDG_Enable();
} // IWDG_Init()
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void IWDG_Config(void)
{
	//0x5555,Enable IWDG
	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
	//40k/256=156kHz(6.4ms)
	IWDG_SetPrescaler(IWDG_Prescaler_256);
	//5s/6.4ms = 781, Max = 0xFFF
	IWDG_SetReload( RELOAD_TIM_MS(1000) );
	//Feed the Watch Dog
	IWDG_ReloadCounter();
	//Enable Watch Dog
	IWDG_Enable();
}
Esempio n. 29
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/*******************************************************************************
* 				          IWDG配置(独立看门狗) 
*	  看门狗的溢出时间:T=((4×2^Prer)×RLR)/40
*	  看门狗的溢出时间:T=1s,Prer=4(分频)分频因子为64  重载值RLR=625
*******************************************************************************/
void IWDG_Init(void)
{
	//对IWDG_PR和IWDG_RLR寄存器的写访问被使能
	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
	//设置预分频因子为64
	IWDG_SetPrescaler(IWDG_Prescaler_64);
	//设定重载值为625
	IWDG_SetReload(625);
	//喂狗
	IWDG_ReloadCounter();
	//使能IWDG
	IWDG_Enable();
}
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void IwdgConfig()
{
    RCC_LSICmd(ENABLE);                              //打开LSI
    while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY)==RESET);
    IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);

    IWDG_SetPrescaler(IWDG_Prescaler_32);

    IWDG_SetReload(4000);      //80ms ,max 0xFFF  0~4095 

    IWDG_ReloadCounter();

    IWDG_Enable();
}