21 lines
691 B
C
21 lines
691 B
C
#include "ds1307.h"
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#include "i2c_master.h"
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void ds1307_set_time(uint8_t h, uint8_t m, uint8_t s) {
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uint8_t data[] = {
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((s % 10) | ((s / 10) << 4)) & 0x7F,
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((m % 10) | ((m / 10) << 4)) & 0x7F,
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((h % 10) | ((h / 10) << 4)) & 0x3F,
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0, 0, 0, 0, 0
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}; // 24-hour mode
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i2c_write_register(DS1307_ADDR, 0, data, 8, 100);
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}
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void ds1307_get_time(uint8_t *h, uint8_t *m, uint8_t *s) {
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uint8_t data[3];
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i2c_read_register(DS1307_ADDR, 0, data, 3, 100);
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*s = (data[0] & 0b1111) + ((data[0] & 0b1110000) >> 4) * 10;
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*m = (data[1] & 0b1111) + ((data[1] & 0b1110000) >> 4) * 10;
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*h = (data[2] & 0b1111) + ((data[2] & 0b0110000) >> 4) * 10;
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}
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