/**
* @brief Initialise and start the watchdog
*
* The prescaler and reload set the timeout. A prescaler of 3 divides
* the 40 kHz clock by 32 and gives roughly 1 ms per reload.
*
* @param prescaler Prescaler for the 40 KHz IWDG clock.
* @param reload Independent watchdog counter reload value.
*/
void iwdg_init(iwdg_prescaler prescaler, uint16 reload) {
IWDG_BASE->KR = IWDG_KR_UNLOCK;
IWDG_BASE->PR = prescaler;
IWDG_BASE->RLR = reload;
/* Start things off */
IWDG_BASE->KR = IWDG_KR_START;
iwdg_feed();
}
void watchdog_reset() {
#if PIN_EXISTS(LED)
TOGGLE(LED_PIN); // heartbeat indicator
#endif
iwdg_feed();
}
void watchdog_reload(void){
iwdg_feed();
}