LED BOARD

/*in this hardware configuration, port2 is connected to the rows of an 8x5 LED array and the lower 3 bits of P1
/*is connected to a 3x8 decoder which controls the 5 columns of the array. in the software, character "A" is
/*displayed on the LED array using pointer function. when the array containing the patterns of character "A" is
/*placed in DATA memory, the program works perfectly well. the Irony is that when i tried to put the patterns in
/*code memory, nonsensical results were obtained. Can anyone help me with this mess?*/
#include <REG52.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>

/***********************************Global parameters***********************************/

unsigned char *DATA_POINTER;
//unsigned char ARRAY_WIDTH;
signed int start_horiz_pos;
unsigned char char_pointer;
/* first */ /* unsigned char code A[6] ={0x00,0x3F,0x50,0x90,0x50,0x3F}; */
/* second */ /*unsigned char code A[6] ={0x00,0x3F,0x50,0x90,0x50,0x3F}; */


main()

{
/***********************************functions*******************************************/
void delay (void);
void DISP (unsigned char *DATA_POINTER);
void EMERGE_FROM_LEFT (unsigned char [6]);
/************************************variables******************************************/
unsigned char A[6]; /*=(0x00,0x3F,0x50,0x90,0x50,0x3F); */
/**************************************MAIN*********************************************/

A[0]=0x00;
A[1]=0x3F;
A[2]=0x50;
A[3]=0x90;
A[4]=0x50;
A[5]=0x3F;

while(1)
{
start_horiz_pos=0;
DATA_POINTER=&A[0];
DISP(DATA_POINTER);
// char_pointer=0;
// EMERGE_FROM_LEFT(A);
}
}
/*******************************************************************************************/
void delay (void)
{
unsigned char COUNTER;

for ( COUNTER=0; COUNTER<1 ; COUNTER++)
{
TR0=0;
TF0=0;
TMOD=1;
TL0=0x3C;
TH0=0xF6;
TR0=1;
while(!TF0){}

}
}
/*******************************************************************************************/

void DISP (unsigned char *DATA_POINTER)
{
signed char position;
for( position = start_horiz_pos; position < start_horiz_pos+6; position++, DATA_POINTER++)
{
if (position >-1 && position < 6 ) /* ARRAY_WIDTH*/
{
P2=*DATA_POINTER;
P1=position-1;
delay();
}
}
}