display ds1307rtc in lcd

[jaya krishna]

display ds1307rtc in lcd ASCII to decimal

hi i want to display DS1307 rtc time in my lcd, in following program it display the time in ASCII value but i need to convert ASCII to decimal value.... any one can help me...

#if defined(__PCM__)
#include <16F877A.h>
#use delay(clock=4000000)
#fuses NOWDT,XT, NOPUT, NOPROTECT
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)
#include "ds1307.c"

#define rs PIN_C0
#define rw PIN_C1
#define en PIN_C2

void lcdcmd(unsigned char cmd);
 void lcddata(unsigned long int volt);
void lcddata1(char *dat);
char dis[]="Time:";
 





void main(void)
{
   int8 sec,min,hour,day,date,month,year,time[4];
  set_tris_b(0x00);
   set_tris_a(0xFF);
   
     

   delay_ms(50);
   init_ds1307();          // initial DS1307
   sec=read_ds1307(0);
   write_ds1307(0,sec & 0x7F); // enable oscillator(bit 7 =0)
  
 
    lcdcmd(0x38);
    lcdcmd(0x0E);
    lcdcmd(0x01);
    lcdcmd(0x06);
    lcdcmd(0x80);
    
   while(1)
   {
   
    lcddata1(dis);

     sec=read_ds1307(0);   // read second
     min=read_ds1307(1);   // read minute
    
     hour=read_ds1307(2);  // read hour
     day=read_ds1307(3);   // read day
     date=read_ds1307(4);  // read date
     month=read_ds1307(5); // read month
     year=read_ds1307(6);  // read year
     
   
     
     time[1]= (hour);
     time[2]= (min);
     time[3]= (sec);
  
     lcddata(time[1]+0x30);
     lcddata(':');
     lcddata(time[2]+0x30);
     lcddata(':');
     lcddata(time[3]+0x30);
              
      delay_ms(100);

      lcdcmd(0x80);
   }
}

void lcdcmd(unsigned char cmd)
              

{
  output_b(cmd);
  output_low(rs);
  output_low(rw);
  output_high(en);
  delay_ms(1);
  output_low(en);
  
}

void lcddata(unsigned long int volt)

{
  output_b(volt);
  output_high(rs);
  output_low(rw);
  output_high(en);
  delay_ms(1);
  output_low(en);
}

void lcddata1(char *dat)
 {
    
    output_high(rs);
    for(;*dat!='\0';*dat++)
      lcddata(*dat);   
   
 }

ds1307

#define DS1307_SDA  PIN_C4
#define DS1307_SCL  PIN_C3
#use i2c(master, sda=DS1307_SDA, scl=DS1307_SCL)




//==========================
// initial DS1307
//==========================
void init_DS1307()
{
   output_float(DS1307_SCL);
   output_float(DS1307_SDA);
}
//==========================
// write data one byte to
// DS1307
//==========================
void write_DS1307(byte address, BYTE data)
{
   short int status;
   i2c_start();
   i2c_write(0xd0);
   i2c_write(address);
   i2c_write(data);
   i2c_stop();
   i2c_start();
   status=i2c_write(0xd0);
   while(status==1)
   {
      i2c_start();
      status=i2c_write(0xd0);
   }
}
//==========================
// read data one byte from DS1307
//==========================
BYTE read_DS1307(byte address)
{
   BYTE data;
   i2c_start();
   i2c_write(0xd0);
   i2c_write(address);
   i2c_start();
   i2c_write(0xd1);
   data=i2c_read(0);
   i2c_stop();
   return(data);
}

 

[jaya krishna]

Re: display ds1307rtc in lcd ASCII to decimal

pls any body help for above post..........i need it urgent.............thanks.......

 

[ud23]

Re: display ds1307rtc in lcd ASCII to decimal

DS1307Read(0x00,&data);
		Time[8]='\0';
		Time[7]=48+(data & 0b00001111);
		Time[6]=48+((data & 0b01110000)>>4);
		Time[5]=':';
	
		DS1307Read(0x01,&data);
	
		Time[4]=48+(data & 0b00001111);
		Time[3]=48+((data & 0b01110000)>>4);
		Time[2]=':';
	
		DS1307Read(0x02,&data);
	
		Time[1]=48+(data & 0b00001111);
		Time[0]=48+((data & 0b00010000)>>4);

		LCDClear();
	
		LCDWriteString("DS1307 RTC Exmple");
	
		LCDWriteStringXY(2,1,Time);