RTC8564.cpp

00001 #include "mbed.h"
00002 #include "RTC8564.h"
00003 
00004 //lpc1768
00005 void rtc_write(char address, char value)
00006 {
00007     i2c.start();
00008     i2c.write(RTC8564NB_ADR);
00009     i2c.write(address);
00010     i2c.write(value);
00011     i2c.stop();
00012 }
00013 
00014 char rtc_read(char address)
00015 {
00016     char value;
00017     i2c.start();
00018     i2c.write(RTC8564NB_ADR);
00019     i2c.write(address);
00020     i2c.start();
00021     i2c.write(RTC8564NB_ADR | _READ);
00022     value = i2c.read(0);
00023     i2c.stop();
00024     
00025     return value;
00026 }
00027 
00028 void time_just()
00029 {
00030     char _min, _hour;
00031     _min = rtc_read(MINUTES);
00032     if (_min >= 0x30) { 
00033             _hour = rtc_read(HOURS);
00034             if (_hour == 0x23)
00035                 _hour = 0x00;
00036             else if ((_hour & 0x0F) == 0x09)
00037                 _hour = (_hour & 0xF0) + 0x10;
00038             else
00039                 _hour = _hour + 0x01;
00040             rtc_write(HOURS, _hour);
00041     }
00042     rtc_write(MINUTES, 0x00);
00043     rtc_write(SECONDS, 0x00);
00044 }
00045 
00046 
00047 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])
00048 {
00049     rtc_write(CONTROL1, 0x20); //stop
00050     rtc_write(CONTROL2, 0x00);
00051     rtc_write(YEARS, ((y[0]-0x30)<<4)+(y[1]-0x30)); 
00052     rtc_write(MONTHS, ((m[0]-0x30)<<4)+(m[1]-0x30));
00053     rtc_write(DAYS, ((d[0]-0x30)<<4)+(d[1]-0x30));
00054     rtc_write(HOURS, ((h[0]-0x30)<<4)+(h[1]-0x30));
00055     rtc_write(MINUTES, ((min[0]-0x30)<<4)+(min[1]-0x30));
00056     rtc_write(SECONDS, ((s[0]-0x30)<<4)+(s[1]-0x30));
00057     rtc_write(WEEKDAYS, week_val[0] - 0x30); //Sunday = "0", Monday = "1" ...
00058     rtc_write(CLOCKOUT_FREQ, 0x00); // 0x83 = TE on & 1Hz
00059     rtc_write(TIMER_CONTROL, 0x00);
00060     rtc_write(CONTROL1, 0x00); //start
00061     return;
00062 }