C code iam trying to interface 8x8 dot matrix disp

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sriraj_jan

Joined: 24 Dec 2008
Posts: 4

24 Dec 2008 12:29 C code iam trying to interface 8x8 dot matrix disp

here is the code iam trying to interface 8x8 dot matrix display to 89c51.. please help me out...

/*************

#include<reg51.h>

sfr col = 0xA0;
sfr row = 0x80;

sbit r1 = P0^0;
sbit r2 = P0^1;
sbit r3 = P0^2;
sbit r4 = P0^3;
sbit r5 = P0^4;
sbit r6 = P0^5;
sbit r7 = P0^6;
sbit r8 = P0^7;

void delay();

char tdata[]={0x01111110,0x10111101,0x11011011,0x11100111,0x11100111,0x11011011,0x10111101,0x01111110};

void main()
{
row=0x00;

while(1)
{

r1=1;
col=tdata[0];

delay();

r1=0;

r2=1;
col=tdata[1];

delay();

r2=0;

r3=1;
col=tdata[2];

delay();

r3=0;

r4=1;
col=tdata[3];

delay();

r4=0;

r5=1;
col=tdata[4];

delay();

r5=0;

r6=1;
col=tdata[5];

delay();

r6=0;

r7=1;
col=tdata[6];

delay();

r7=0;

r8=1;
col=tdata[7];

delay();
r8=1;
}

}

void delay()
{
unsigned int i,j;
for(i=0;i<1275;i++)
for(j=0;j<500;j++);
}