RTC8564.cpp

00001 #include "mbed.h"
00002 #include "RTC8564.h"
00003 
00004 I2C i2c(p9, p10);
00005 
00006 void rtc_write(char address, char value)
00007 {
00008     i2c.start();
00009     i2c.write(RTC8564NB_ADR);
00010     i2c.write(address);
00011     i2c.write(value);
00012     i2c.stop();
00013 }
00014 
00015 char rtc_read(char address)
00016 {
00017     char value;
00018     i2c.start();
00019     i2c.write(RTC8564NB_ADR);
00020     i2c.write(address);
00021     i2c.start();
00022     i2c.write(RTC8564NB_ADR | _READ);
00023     value = i2c.read(0);
00024     i2c.stop();
00025     
00026     return value;
00027 }
00028 
00029 void time_just()
00030 {
00031     char _min, _hour;
00032     _min = rtc_read(MINUTES);
00033     if (_min >= 0x30) { 
00034             _hour = rtc_read(HOURS);
00035             if (_hour == 0x23)
00036                 _hour = 0x00;
00037             else if ((_hour & 0x0F) == 0x09)
00038                 _hour = (_hour & 0xF0) + 0x10;
00039             else
00040                 _hour = _hour + 0x01;
00041             rtc_write(HOURS, _hour);
00042     }
00043     rtc_write(MINUTES, 0x00);
00044     rtc_write(SECONDS, 0x00);
00045 }
00046 
00047 
00048 void rtc_setdaytime(char y[3], char m[3], char d[3], char h[3], char min[3], char s[3], char week_val[2])
00049 {
00050     rtc_write(CONTROL1, 0x20); //stop
00051     rtc_write(CONTROL2, 0x00);
00052     rtc_write(YEARS, ((y[0]-0x30)<<4)+(y[1]-0x30)); 
00053     rtc_write(MONTHS, ((m[0]-0x30)<<4)+(m[1]-0x30));
00054     rtc_write(DAYS, ((d[0]-0x30)<<4)+(d[1]-0x30));
00055     rtc_write(HOURS, ((h[0]-0x30)<<4)+(h[1]-0x30));
00056     rtc_write(MINUTES, ((min[0]-0x30)<<4)+(min[1]-0x30));
00057     rtc_write(SECONDS, ((s[0]-0x30)<<4)+(s[1]-0x30));
00058     rtc_write(WEEKDAYS, week_val[0] - 0x30); //Sunday = "0", Monday = "1" ...
00059     rtc_write(CLOCKOUT_FREQ, 0x00); // 0x83 = TE on & 1Hz
00060     rtc_write(TIMER_CONTROL, 0x00);
00061     rtc_write(CONTROL1, 0x00); //start
00062     return;
00063 }