22 lines
695 B
C
22 lines
695 B
C
#include "ds1307.h"
|
|
#include "i2c_master.h"
|
|
|
|
void ds1307_set_time(uint8_t h, uint8_t m, uint8_t s) {
|
|
uint8_t data[] = {
|
|
((s % 10) | ((s / 10) << 4)) & 0x7F,
|
|
((m % 10) | ((m / 10) << 4)) & 0x7F,
|
|
((h % 10) | ((h / 10) << 4)) & 0x3F,
|
|
0, 0, 0, 0, 0
|
|
}; // 24-hour mode
|
|
i2c_writeReg(DS1307_ADDR, 0, data, 8, 100);
|
|
}
|
|
|
|
void ds1307_get_time(uint8_t *h, uint8_t *m, uint8_t *s) {
|
|
uint8_t data[3];
|
|
i2c_readReg(DS1307_ADDR, 0, data, 3, 100);
|
|
i2c_stop();
|
|
*s = (data[0] & 0b1111) + ((data[0] & 0b1110000) >> 4) * 10;
|
|
*m = (data[1] & 0b1111) + ((data[1] & 0b1110000) >> 4) * 10;
|
|
*h = (data[2] & 0b1111) + ((data[2] & 0b0110000) >> 4) * 10;
|
|
}
|