main.cpp

00001 /*
00002   Hotboards_rtcc Library - alarm
00003  Demonstrates the use a MCP7941x clock calendar.  The Hotboards_rtcc
00004  library works with this microchip real time clock 
00005  (http://www.hotboards.org).
00006  
00007  This sketch shows how to repeat an alarm every minute
00008  
00009   The circuit:
00010  *  VDD  -->  3.3v
00011  *  GND  -->  GND
00012  *  SDA  -->  SDA
00013  *  SCL  -->  SCL
00014  
00015 */
00016 #include "mbed.h"
00017 #include "Hotboards_rtcc.h"
00018 
00019 /* days of the week */
00020 const char *week[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
00021 /* months of the year */
00022 const char *months[] = {"JAN","FEB","MAR","APR","MAY","JUN", "JUL", "AUG","SEPT","OCT","NOV","DEC"};
00023 
00024 /*serial port init*/
00025 Serial pc(USBTX,USBRX);
00026 /*i2c instance delaration for use with the rtcc library*/
00027 I2C device(PB_9, PB_8);
00028 /*lets declare and rtcc instance */
00029 Hotboards_rtcc rtcc(device);
00030 
00031 int main() 
00032 {
00033      /*i2c bus clock set to 100khz*/
00034     device.frequency(100000);
00035     /* init the rtcc, just enable the clock if not already enable */
00036     rtcc.begin();
00037     /* set the time when is compiled*/
00038     DateTime time( __DATE__, __TIME__);
00039     rtcc.adjust(time); 
00040     
00041     /* Set an alarm after one minute */
00042     DateTime alarm = time + TimeSpan( 0, 0, 1, 0 );
00043     rtcc.setAlarm( alarm );
00044     /* enable the alarm */
00045     rtcc.turnOnAlarm( );
00046   
00047     printf("The alarm will be active in one minute \n");
00048 
00049     while(1)
00050     {
00051        /* is the alarm active?? */
00052        if( rtcc.getAlarmStatus( ) == 1 )
00053        {
00054         /* clear the alarm */
00055         rtcc.clearAlarm( );
00056         /* display the time */
00057         DateTime time = rtcc.now( );
00058         printf( "Alarm active at:  Time- %d:%d:%d  Date-  %s/ %d/ %s/ %d\n",time.hour( ),time.minute( ),time.second( ),week[time.dayOfTheWeek( )],time.day( ),months[time.month( )],time.year());
00059         /* Set an alarm one minute after the current time, again */
00060         alarm = time + TimeSpan( 0, 0, 1, 0 );
00061         rtcc.setAlarm( alarm );
00062        }
00063     }
00064 }
00065