thanks for your interest in my project. I developed a code which will count 1000 pulses and increment unit =unit+1. i have not used external interrupt (INT0 PIN3.2 of AT89C51). Please developed this code using EXT INTERRUPT (INT0) & also help me to send the LCD display content by SMS to user after every 100 units consumed.
MY Code:
#include<reg51.h>
#define LCD P2
unsigned int Count,Unit,d1,d2,d3,d4,x1,x2,x3,d5,d6,d7,d8,x4,x5,x6,x7;
sbit rs = P1^0;
sbit rw = P1^1;
sbit en = P1^2;
sbit Pulse = P1^3;
void LCDInit ( );
void lcdcmd (unsigned char );
void lcdwrt (unsigned char );
void Delay (unsigned int );
void Conv1 (unsigned int );
void Conv2 (unsigned int );
void main(void)
{
unsigned char z,Disp;
unsigned char code str1[]=”ENERGY METER”;
//unsigned char code str2[]=”PULSE: 0000 “;
unsigned char code str2[]=”METER ID:XXX “;
unsigned char code str3[]=”UNITS: 0000 “;
P0=0x00;
P1=0x00;
P2=0x00;
P3=0x00;
Count=0x00;
Unit=0x00;
LCDInit();
for(z=0;z<16;z++)
{
Disp=str1[z];
lcdwrt(Disp);
Delay(1);
lcdcmd(0x80);
for(z=0;z<16;z++)
{
Disp=str2[z];
lcdwrt(Disp);
Delay(1);
}
Delay(70);
lcdcmd(0xC0);
for(z=0;z<16;z++)
{
Disp=str3[z];
lcdwrt(Disp);
Delay(1);
}
Delay(70);
while(1)
{
Delay(30);
if(Pulse==0)
{
Count=Count+1;
Conv1(Count);
Conv2(Unit);
if(Count==1000){
Count=0x00;
Unit=Unit+1;
}
}
}
}
}
void Conv1(unsigned int val1)
{
x1 = val1 / 10;
d1 = val1 % 10;
x2 = x1 / 10;
d2 = x1 % 10;
x3 = x2 / 10;
d3 = x2 % 10;
d4 = x3 % 10;
d1=d1+0x30;
d2=d2+0x30;
d3=d3+0x30;
d4=d4+0x30;
}
void Conv2(unsigned int val2)
{
x4 = val2 / 10;
d5 = val2 % 10;
x5 = x4 / 10;
d6 = x4 % 10;
x6 = x5 / 10;
d7 = x5 % 10;
d8 = x6 % 10;
d5=d5+0x30;
d6=d6+0x30;
d7=d7+0x30;
d8=d8+0x30;
lcdcmd(0xc7);
lcdwrt(d8);
lcdwrt(d7);
lcdwrt(d6);
lcdwrt(d5);
Delay(1);
Delay(30);
}
void LCDInit()
{
lcdcmd(0x38);
Delay(10);
lcdcmd(0x0E);
Delay(10);
lcdcmd(0x01);
Delay(10);
lcdcmd(0x0C);
Delay(10);
lcdcmd(0x80);
Delay(10);
return;
}
void lcdcmd(unsigned char value)
{
LCD=value;
rs=0;
rw=0;
en=1;
Delay(1);
en=0;
return;
}
void lcdwrt(unsigned char value)
{
LCD=value;
rs=1;
rw=0;
en=1;
Delay(1);
en=0;
return;
}
void Delay(unsigned int x)
{
unsigned int i,j;
for (i=0;i<=x;i++)
for (j=0;j<=500;j++);
}