Independent Watchdog never resets the processor

[bmagnan]

Posted on June 30, 2010 at 15:38

Independent Watchdog never resets the processor

[trevor23]

Posted on May 17, 2011 at 13:56

This is what I use and it is working:

static void start_watchdog(void) {     RCC_LSICmd( ENABLE );   // enable low speed internal clock used by watchdog     while (IWDG->SR & 0x3); // wait for previos update operations to complete     IWDG->KR = 0x5555;      // Enable independent watchdog register access     IWDG->PR = 6;           // prescaller set to divice by 256 (min 6.4ms, max 26214.4ms)     IWDG->RLR = 0xFFF;        // reload value (0xFFF max)     IWDG->KR = 0xCCCC;      // start the watchdog } void stroke_watchdog(void) {     IWDG->KR = 0xAAAA; } Regards Trevor

[Tesla DeLorean]

Posted on May 17, 2011 at 13:56

  /* IWDG timeout equal to xxx ms (the timeout may varies due to LSI frequency dispersion) */

  IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable); /* Enable write access to IWDG_PR and IWDG_RLR registers */   /* IWDG counter clock: 40KHz(LSI) / 32 = 1.25 KHz, 256 = 156 Hz (Prescaler 4..256)*/   IWDG_SetPrescaler(IWDG_Prescaler_256);   /* Set counter reload value to */   IWDG_SetReload(4056); // 12-bit downcount (0-4095), 26 seconds   IWDG_ReloadCounter(); /* Reload IWDG counter */   IWDG_Enable(); /* Enable IWDG (the LSI oscillator will be enabled by hardware) */