carrot/panda/board/drivers/watchdog.h
Vehicle Researcher fa724893fb openpilot v0.9.6 release
date: 2024-02-21T23:02:42
master commit: 0b4d08fab8e35a264bc7383e878538f8083c33e5
2024-02-27 13:29:38 -08:00

25 lines
528 B
C

typedef enum {
WATCHDOG_50_MS = (400U - 1U),
WATCHDOG_500_MS = 4000U,
} WatchdogTimeout;
void watchdog_feed(void) {
IND_WDG->KR = 0xAAAAU;
}
void watchdog_init(WatchdogTimeout timeout) {
// enable watchdog
IND_WDG->KR = 0xCCCCU;
IND_WDG->KR = 0x5555U;
// 32KHz / 4 prescaler = 8000Hz
register_set(&(IND_WDG->PR), 0x0U, IWDG_PR_PR_Msk);
register_set(&(IND_WDG->RLR), timeout, IWDG_RLR_RL_Msk);
// wait for watchdog to be updated
while (IND_WDG->SR != 0U);
// start the countdown
watchdog_feed();
}