63 lines
1.1 KiB
C
63 lines
1.1 KiB
C
#include <avr/interrupt.h>
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#include <avr/io.h>
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#include "rtc.h"
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#include "i2c.h"
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volatile struct TIME_HMS time;
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void rtc_int0_init(void)
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{
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INT0_DIR &= ~(1<<INT0_PIN);
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INT0_PORT |= (1<<INT0_PIN);
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GICR |= (1<<INT0);
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}
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void rtc_int1_init(void)
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{
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INT1_DIR &= ~(1<<INT1_PIN);
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INT1_PORT |= (1<<INT1_PIN);
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GICR |= (1<<INT1);
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}
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void rtc_set_time_part(uint8_t part, uint8_t value)
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{
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uint8_t bcd = DEC_2_BCD(value);
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i2c_writebuf(RTC_I2C_ADDR, part, 1, &bcd);
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}
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void rtc_set_time(struct TIME_HMS* time)
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{
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uint8_t buf[] = { DEC_2_BCD(time->second), DEC_2_BCD(time->minute), DEC_2_BCD(time->hour) };
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i2c_writebuf(RTC_I2C_ADDR, SECOND, 3, buf); // SECOND is the first memory cell (0x02)
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}
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struct TIME_HMS rtc_read_time(void)
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{
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uint8_t buffer[3];
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i2c_readbuf(RTC_I2C_ADDR, 0x02, 3, buffer);
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struct TIME_HMS curr_time = {
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BCD_2_DEC(buffer[2]),
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BCD_2_DEC(buffer[1]),
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BCD_2_DEC(buffer[0])
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};
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return curr_time;
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}
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uint8_t rtc_handle_timer(void)
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{
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if(!(GIFR & (1<<INTF0)))
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{
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time = rtc_read_time();
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GIFR |= 1<<INTF0;
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return 1;
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}
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return 0;
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}
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ISR(INT0_vect)
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{
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} |