qmk_firmware

QMK firmware for my keyboards (Corne, Sweep Ferris) and trackball (Ploopy Adept)
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ds1307.c (691B)

      1 #include "ds1307.h"
      2 #include "i2c_master.h"
      3 
      4 void ds1307_set_time(uint8_t h, uint8_t m, uint8_t s) {
      5     uint8_t data[] = {
      6         ((s % 10) | ((s / 10) << 4)) & 0x7F,
      7         ((m % 10) | ((m / 10) << 4)) & 0x7F,
      8         ((h % 10) | ((h / 10) << 4)) & 0x3F,
      9         0, 0, 0, 0, 0
     10     }; // 24-hour mode
     11     i2c_write_register(DS1307_ADDR, 0, data, 8, 100);
     12 }
     13 
     14 void ds1307_get_time(uint8_t *h, uint8_t *m, uint8_t *s) {
     15     uint8_t data[3];
     16     i2c_read_register(DS1307_ADDR, 0, data, 3, 100);
     17     *s = (data[0] & 0b1111) + ((data[0] & 0b1110000) >> 4) * 10;
     18     *m = (data[1] & 0b1111) + ((data[1] & 0b1110000) >> 4) * 10;
     19     *h = (data[2] & 0b1111) + ((data[2] & 0b0110000) >> 4) * 10;
     20 }