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30 lines
563 B
30 lines
563 B
7 years ago
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#include <libopencm3/cm3/nvic.h>
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#include <libopencm3/stm32/exti.h>
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#include <libopencm3/stm32/rtc.h>
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void rtc_alarm_isr(void)
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{
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exti_reset_request(EXTI17);
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if (rtc_check_flag(RTC_ALR)) {
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rtc_clear_flag(RTC_ALR);
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rtc_set_alarm_time(rtc_get_counter_val() + 10);
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EXTI_IMR |= EXTI17;
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exti_set_trigger(EXTI17, EXTI_TRIGGER_RISING);
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}
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}
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int alarm_init(void)
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{
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rtc_enable_alarm();
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rtc_set_alarm_time(rtc_get_counter_val() + 10);
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nvic_enable_irq(NVIC_RTC_ALARM_IRQ);
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EXTI_IMR |= EXTI17;
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exti_set_trigger(EXTI17, EXTI_TRIGGER_RISING);
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return 0;
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}
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