[poovi]

                                               I have checked the LCD separately using a sample code and it displays properly.  So I decided to check the RTC separately and gave the code as below. The code executed correctly on Kiel Simulator. (it constantly displayed 16:55:58) However when I burnt the same code into the microcontroller and connected the hardware, there was no output on Hyper terminal.. ( I am not exactly sure how to use Hyper terminal) .  PLease help me as I need to submit this as my project

 

       

 

//Program to interface RTC DS12C887 with 8051 microcontroller (AT89C51)
#include<reg51.h>
#include<absacc.h>
 char hr, min, sec;
 
void delay(int time)
{
    int i,j;
    for(i=0;i<time;i++)
    for(j=0;j<1275;j++);
}

serial(char x) // Function to transmit data serially using RS232
{
    
    SBUF=x;
    while(TI==0);
    TI=0;
}

void bcdconv(char mybyte) // Function to convert data into BCD format.
{
    char x,y;
    x=mybyte&0x0F;
    x=x|0x30;
    y=mybyte&0xF0;
    y=y>>4;
    y=y|0x30;
    serial(y);
    serial(x) ;
}

void main()
{
    TMOD=0x20;
    TH1=0xFD;
    SCON=0X50;                          
    TR1=1;
    delay(220);
    XBYTE[10]=0x20;
    delay(20);
    XBYTE[10]=0x30;
    XBYTE[11]=0x83;
    XBYTE[0]=0x55;
    XBYTE[2]=0x58;
    XBYTE[4]=0x16;
    XBYTE[7]=0x02;
    XBYTE[8]=0x02;
    XBYTE[9]=0x02;
    XBYTE[11]=0x03;
    while(1)
    {
        XBYTE[10]=0x20;
        delay(500);
        hr=XBYTE[4];
        bcdconv(hr);
        serial(‘:’);
        min=XBYTE[2];
        bcdconv(min);
        serial(‘:’);
        sec=XBYTE[0];
        bcdconv(sec);
        serial(0x0D);
        serial(0x0A);
    }
}