microcontroller coin counter with IR sensor

[akmal]

 

hi there

I m working on coin counter project which can count the no. of coin entering in a boc. I am using at89c51,infrared led and a transistor and lcd for displaying no of counts.

 

 

 

 

 

 

after i make a connection, my LCD show this results. There's no display on it. Im use this code "C Language"

 

#include<reg51.h>

 

 

void lcdcmd (unsigned char value);

void lcddata (unsigned char value);

void lcdready();

void display(unsigned char z);

void MSDelay (unsigned int itime);

 

sfrldata = 0x90;

sbit rs = P2^0;

sbit rw = P2^1;

sbit en = P2^2;

sbit busy = P1^7;

sbit sen5 = P2^4;

sbit sen10 = P2^5;

sbit sen20 = P2^6;

sbit sen50 = P2^7;

 

void main()

{

            unsigned int a;

            unsigned int b;

            unsigned int c;

            unsigned int e;

 

            unsigned int ao;

            unsigned int bo;

            unsigned int co;

            unsigned int eo;

 

            lcdcmd(0x38);

            lcdcmd(0x0E);

            lcdcmd(0x01);

            lcdcmd(0x06);

           

            lcdcmd(0x80);

            lcddata('5');

            lcddata('c');

    

            lcdcmd(0x84);

            lcddata('1');

            lcddata('0');

            lcddata('c');

 

            lcdcmd(0x89);

            lcddata('2');

            lcddata('0');

            lcddata('c');

 

            lcdcmd(0x8D);

            lcddata('5');

            lcddata('0');

            lcddata('c');

 

            a = 1;

            b = 1;

            c = 1;

            e = 1;

 

            while(1)

            {

                        sen5 = 1;

                        sen10 = 1;

                        sen20 = 1;

                        sen50 = 1;

 

                        while(sen5 == 0)

                        {

                                    ao = a++;

                                    lcdcmd(0xC0);

                                    display (ao);

                                    MSDelay(100);

                        }

                        while(sen10 == 0)

                        {

                                    bo = b++;

                                    lcdcmd(0xC4);

                                    display (bo);

                                    MSDelay(100);

                        }

                        while(sen20 == 0)

                        {

                                    co = c++;

                                    lcdcmd(0xC9);

                                    display (co);

                                    MSDelay(100);

                        }

                        while(sen50 == 0)

                        {

                                    eo = e++;

                                    lcdcmd(0xCD);

                                    display(eo);

                                    MSDelay(100);

                        }

            }

}

 

 

void lcdcmd (unsigned char value)     

{

            lcdready();

            ldata = value;

            rs = 0;

            rw = 0;

            en = 1;

            MSDelay(1);

            en = 0;

            return;

}

 

void lcddata (unsigned char value)      

{

            lcdready();

            ldata = value;

            rs = 1;

            rw = 0;

            en = 1;

            MSDelay(1);

            en = 0;

            return;

}

 

void lcdready()

{

            busy = 1;

            rs = 0;

            rw = 1;

            while (busy == 1)

            {

                        en = 0;

                        MSDelay (1);

                        en = 1;

            }

            return;

}

 

void display(unsigned char z)

{

            unsigned char x,d1,d2;

 

            x = z / 10;

            d1 = z % 10;

            d2 = x % 10;

 

            lcddata(d2 + 0x30);

            lcddata(d1 + 0x30);

}

 

void MSDelay (unsigned int itime)     

{

            unsigned int i,j;

            for (i = 0; i<itime; i++)

                        for (j = 0; j<1275; j++);

}

 

can anyone find the problem to fix this error??

[AJISH ALFRED]

try the code after changing your lcdready() function like the following

 

void lcdready()

{

  //          busy = 1;

            rs = 0;

            rw = 1;

  //          while (busy == 1)

  //          {

                        en = 0;

                        MSDelay ( 100 );

                        en = 1;

  //          }

            return;

}

[Author]

Posts