ds1302rtc.c

PIC16F877 and DS1302 RTC

//----------------------------------------------------------
//
// ds1302RTC.c
//
//----------------------------------------------------------
#include<16f877.h> //Device
#fuses xt,nowdt,protect,noput,nolvp //Fuses
#use delay (clock=4000000) //4.00 MHz
#use rs232 (Baud=9600) //RS-232 parametres
//(only for printf function)
#include"LCD.C" //LCD driver
#include "ds1302.C" //ds1302 driverint day,mth,year,dow,h,m,s;
int a,b,c,d,e,x,y,z,v;
set_h() //set hour
{
while(!input(pin_b0)) //wait till button released
delay_ms(5);
while(1)
{
if(!input(pin_a4)&input(pin_b0)) //if button pressed
if(++d>23) //increase hours
d=0; //till < 24
delay_ms(200);
printf(lcd_putc,"\f%02u-%02u-20%02u",a,b,c);
printf(lcd_putc,"\n%02u:%02u:00",d,e);
rtc_set_datetime(a,b,c,0,d,e); //set date and time
delay_ms(50); //0-24h mode; 1-12h mode
x=1;
if(!input(pin_b0)) //return if button pressed
{delay_ms(100);
return(0);}
}
}
set_m() //set minute
{
while(!input(pin_b0))
delay_ms(5);
while(1)
{
if(!input(pin_a4)&input(pin_b0))
if(++e>59)
e=0;
delay_ms(200);
printf(lcd_putc,"\f%02u-%02u-20%02u",a,b,c);
printf(lcd_putc,"\n%02u:%02u:00",d,e);
rtc_set_datetime(a,b,c,0,d,e);
delay_ms(50);
y=1;
if(!input(pin_b0))
{delay_ms(100);
return(0);}
}
}
set_d() //set day
{
while(!input(pin_b0))
delay_ms(5);
while(1)
{
if(!input(pin_a4)&input(pin_b0))
if(++a>31)
a=0;
delay_ms(200);
printf(lcd_putc,"\f%02u-%02u-20%02u",a,b,c);
printf(lcd_putc,"\n%02u:%02u:00",d,e);
rtc_set_datetime(a,b,c,0,d,e);
delay_ms(50);
z=1;
if(!input(pin_b0))
{delay_ms(100);
return(0);}
}
}
set_mo() //set month
{
while(!input(pin_b0))
delay_ms(5);
while(1)
{
if(!input(pin_a4)&input(pin_b0))
if(++b>12)
b=0;
delay_ms(200);
printf(lcd_putc,"\f%02u-%02u-20%02u",a,b,c);
printf(lcd_putc,"\n%02u:%02u:00",d,e);
rtc_set_datetime(a,b,c,0,d,e);
delay_ms(50);
v=1;
if(!input(pin_b0))
{delay_ms(100);
return(0);}
}
}
set_y() //set year
{
while(!input(pin_b0))
delay_ms(5);
while(1)
{
if(!input(pin_a4)&input(pin_b0))
if(++c>99)
c=0;
delay_ms(200);
printf(lcd_putc,"\f%02u-%02u-20%02u",a,b,c);
printf(lcd_putc,"\n%02u:%02u:00",d,e);
rtc_set_datetime(a,b,c,0,d,e);
delay_ms(50);
v=1;
if(!input(pin_b0))
{delay_ms(100);
return(0);}
}
}
main()
{
a=0,b=0,c=0,d=0,e=0,x=0,y=0,z=0,v=0;
rtc_init(); //start ds1302
rtc_set_datetime(a,b,c,0,d,e); //set date and time
while(1)
{
rtc_get_time(hr,min,sec); //read time
rtc_get_date(day,mth,year,dow); //read date
printf(lcd_putc,"\f%02u-%02u-20%02u",day,mth,year);
printf(lcd_putc,"\n%02u:%02u:%02u",h,m,s);
delay_ms(100);
if(!input(pin_b0))
set_h(); //set hour
if(!input(pin_b0)&x)
{while(!input(pin_b0)) //wait till button released
delay_ms(5);
set_m();} //set minute
if(!input(pin_b0)&y)
{while(!input(pin_b0))
delay_ms(5);
set_d();} //set day
if(!input(pin_b0)&z)
{while(!input(pin_b0))
delay_ms(5);
set_mo();} //set month
if(!input(pin_b0)&v)
{while(!input(pin_b0))
delay_ms(5);
set_y();} //set year
}
}