main.cpp

00001 //  This code based on 
00002 //  http://mbed.org/users/okano/notebook/nxp_pcf2127a-demo-code/
00003 //  http://mbed.org/users/roen/notebook/real-time/
00004 //
00005 //  2010-07-02  @nxpfan
00006 //  Released under the MIT License: http://mbed.org/license/mit
00007 
00008 #include "mbed.h"
00009 #include "TextLCD.h"
00010 
00011 TextLCD lcd(p24, p25, p26, p27, p28, p29, p30); // rs, rw, e, d0, d1, d2, d3
00012 Ticker  updater;
00013 
00014 void lcd_update()
00015 {
00016     struct tm   dt, *dtp;
00017     time_t      t;
00018     char        s[ 30 ];
00019     dtp = &dt;
00020 
00021     t       = time( NULL );
00022     dtp     = localtime( &t );
00023 
00024     strftime( s, 20, "%H:%M:%S", dtp );
00025     lcd.locate( 0, 0 );
00026     lcd.printf( "%s", s );
00027 
00028     strftime( s, 20, "%Y/%b/%d(%a)", dtp );
00029     lcd.locate( 0, 1 );
00030     lcd.printf( "%s", s );
00031 }
00032 
00033 int main() {
00034 
00035     // get the current time from the terminal
00036     struct tm t;
00037 
00038     if ( 0 == time( NULL ) ) {  // it should return ((time_t)-1) if it is not initialized but...
00039         lcd.locate( 0, 0 );
00040         lcd.printf( "please set time from terminal" );
00041 
00042         printf("Enter current date and time:\n");
00043         printf("YYYY MM DD HH MM SS[enter]\n");
00044         scanf("%d %d %d %d %d %d", &t.tm_year, &t.tm_mon, &t.tm_mday
00045               , &t.tm_hour, &t.tm_min, &t.tm_sec);
00046 
00047         // adjust for tm structure required values
00048         t.tm_year = t.tm_year - 1900;
00049         t.tm_mon = t.tm_mon - 1;
00050 
00051         // set the time
00052         set_time(mktime(&t));
00053     }
00054 
00055     updater.attach(&lcd_update, 1.0);
00056 
00057     while (1)
00058         ;
00059 }