57 lines
947 B
C
57 lines
947 B
C
/*
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* rtc.h
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*
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* Created on: Oct 16, 2024
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* Author: true
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*/
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#ifndef USER_SRC_RTC_H_
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#define USER_SRC_RTC_H_
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#include <stdint.h>
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/* a small note about backup registers:
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*
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* the datasheet clearly states there are 42 16-bit registers.
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* it does not cut out any exception for CH32V203 except CH32V203RB.
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* however, the reference manual states that registers 11-42 are only
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* for the _D8 chips, and not the _D6 V4B chips like this one.
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* thus we only have _10_ backup registers, not 42.
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*/
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#define RTC_INIT_DR BKP_DR1
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#define RTC_STATE_DR BKP_DR2
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enum RTCState {
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RTC_STATE_UNINITIALIZED = 0,
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RTC_STATE_CLOCK_NOT_SET,
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RTC_STATE_OK = 0x7f
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};
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typedef struct RTClock {
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uint16_t year;
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uint8_t mon;
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uint8_t day;
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uint8_t h;
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uint8_t m;
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uint8_t s;
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} RTClock;
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extern uint8_t rtc_state;
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int8_t rtc_init();
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int8_t rtc_set_clock(struct RTClock *c);
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#endif /* USER_SRC_RTC_H_ */
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