mirror of https://github.com/commaai/panda.git
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
#define RCC_BDCR_MASK_LSE (RCC_BDCR_RTCEN | RCC_BDCR_RTCSEL | RCC_BDCR_LSEMOD | RCC_BDCR_LSEBYP | RCC_BDCR_LSEON)
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#define RCC_BDCR_MASK_LSI (RCC_BDCR_RTCEN | RCC_BDCR_RTCSEL)
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void enable_bdomain_protection(void) {
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register_clear_bits(&(PWR->CR), PWR_CR_DBP);
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}
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void disable_bdomain_protection(void) {
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register_set_bits(&(PWR->CR), PWR_CR_DBP);
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}
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void rtc_wakeup_init(void) {
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EXTI->IMR |= EXTI_IMR_MR22;
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EXTI->RTSR |= EXTI_RTSR_TR22; // rising edge
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EXTI->FTSR &= ~EXTI_FTSR_TR22; // falling edge
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NVIC_DisableIRQ(RTC_WKUP_IRQn);
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// Disable write protection
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disable_bdomain_protection();
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RTC->WPR = 0xCA;
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RTC->WPR = 0x53;
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RTC->CR &= ~RTC_CR_WUTE;
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while((RTC->ISR & RTC_ISR_WUTWF) == 0){}
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RTC->CR &= ~RTC_CR_WUTIE;
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RTC->ISR &= ~RTC_ISR_WUTF;
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//PWR->CR |= PWR_CR_CWUF;
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RTC->WUTR = DEEPSLEEP_WAKEUP_DELAY;
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// Wakeup timer interrupt enable, wakeup timer enable, select 1Hz rate
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RTC->CR |= RTC_CR_WUTE | RTC_CR_WUTIE | RTC_CR_WUCKSEL_2;
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// Re-enable write protection
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RTC->WPR = 0x00;
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enable_bdomain_protection();
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NVIC_EnableIRQ(RTC_WKUP_IRQn);
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}
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