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