GLCD interfacing with pic16f877a

[Lucky]

I am writeing GLCD interfacing program using mplab hi-tech compiler.when i am compileing that code it will showes one warning i.e could not find space (460 bytes) for variable _ch1.anyone please help me.my mail ide [email protected]

 

 

       Here is the my code

 

 

/*==================GLCD interfacing with PIC16f877a==================*/

 

#include<pic.h>

//#include “laxman.h”

 

void glcd_init(void);

void glcd_data(unsigned char);

void glcd_cmd(unsigned char);

void glcd_clear();

void busy_check();

void delay();

 

__CONFIG(0x3f72);

 

/*=====================GLCD Connections==========*/

 

#define RS  RC0

#define RW RC1

#define EN  RC2

#define CS1 RC3

#define CS2 RC4

#define RST RC5

#define data PORTB

 

/*======================Display ADROIT SOLUTIONS on GLCD============*/

 unsigned char ch1[] = {

0x00, 0x00, 0x00, 0x00, 0x00,// (space)

0x00, 0x00, 0x5F, 0x00, 0x00,// !

0x00, 0x07, 0x00, 0x07, 0x00,// “

0x14, 0x7F, 0x14, 0x7F, 0x14,// #

0x24, 0x2A, 0x7F, 0x2A, 0x12,// $

0x23, 0x13, 0x08, 0x64, 0x62,// %

0x36, 0x49, 0x55, 0x22, 0x50,// &

0x00, 0x05, 0x03, 0x00, 0x00,// ‘

0x00, 0x1C, 0x22, 0x41, 0x00,// (

0x00, 0x41, 0x22, 0x1C, 0x00,// )

0x08, 0x2A, 0x1C, 0x2A, 0x08,// *

0x08, 0x08, 0x3E, 0x08, 0x08,// +

0x00, 0x50, 0x30, 0x00, 0x00,// ,

0x08, 0x08, 0x08, 0x08, 0x08,// –

0x00, 0x30, 0x30, 0x00, 0x00,// .

0x20, 0x10, 0x08, 0x04, 0x02,// /

0x3E, 0x51, 0x49, 0x45, 0x3E,// 0

0x00, 0x42, 0x7F, 0x40, 0x00,// 1

0x42, 0x61, 0x51, 0x49, 0x46,// 2

0x21, 0x41, 0x45, 0x4B, 0x31,// 3

0x18, 0x14, 0x12, 0x7F, 0x10,// 4

0x27, 0x45, 0x45, 0x45, 0x39,// 5

0x3C, 0x4A, 0x49, 0x49, 0x30,// 6

0x01, 0x71, 0x09, 0x05, 0x03,// 7

0x36, 0x49, 0x49, 0x49, 0x36,// 8

0x06, 0x49, 0x49, 0x29, 0x1E,// 9

0x00, 0x36, 0x36, 0x00, 0x00,// :

0x00, 0x56, 0x36, 0x00, 0x00,// ;

0x00, 0x08, 0x14, 0x22, 0x41,// <

0x14, 0x14, 0x14, 0x14, 0x14,// =

0x41, 0x22, 0x14, 0x08, 0x00,// >

0x02, 0x01, 0x51, 0x09, 0x06,// ?

0x32, 0x49, 0x79, 0x41, 0x3E,// @

0x7E, 0x11, 0x11, 0x11, 0x7E,// A

0x7F, 0x49, 0x49, 0x49, 0x36,// B

0x3E, 0x41, 0x41, 0x41, 0x22,// C

0x7F, 0x41, 0x41, 0x22, 0x1C,// D

0x7F, 0x49, 0x49, 0x49, 0x41,// E

0x7F, 0x09, 0x09, 0x01, 0x01,// F

0x3E, 0x41, 0x41, 0x51, 0x32,// G

0x7F, 0x08, 0x08, 0x08, 0x7F,// H

0x00, 0x41, 0x7F, 0x41, 0x00,// I

0x20, 0x40, 0x41, 0x3F, 0x01,// J

0x7F, 0x08, 0x14, 0x22, 0x41,// K

0x7F, 0x40, 0x40, 0x40, 0x40,// L

0x7F, 0x02, 0x04, 0x02, 0x7F,// M

0x7F, 0x04, 0x08, 0x10, 0x7F,// N

0x3E, 0x41, 0x41, 0x41, 0x3E,// O

0x7F, 0x09, 0x09, 0x09, 0x06,// P

0x3E, 0x41, 0x51, 0x21, 0x5E,// Q

0x7F, 0x09, 0x19, 0x29, 0x46,// R

0x46, 0x49, 0x49, 0x49, 0x31,// S

0x01, 0x01, 0x7F, 0x01, 0x01,// T

0x3F, 0x40, 0x40, 0x40, 0x3F,// U

0x1F, 0x20, 0x40, 0x20, 0x1F,// V

0x7F, 0x20, 0x18, 0x20, 0x7F,// W

0x63, 0x14, 0x08, 0x14, 0x63,// X

0x03, 0x04, 0x78, 0x04, 0x03,// Y

0x61, 0x51, 0x49, 0x45, 0x43,// Z

0x00, 0x00, 0x7F, 0x41, 0x41,// [

0x02, 0x04, 0x08, 0x10, 0x20,// “”

0x41, 0x41, 0x7F, 0x00, 0x00,// ]

0x04, 0x02, 0x01, 0x02, 0x04,// ^

0x40, 0x40, 0x40, 0x40, 0x40,// _

0x00, 0x01, 0x02, 0x04, 0x00,// `

0x20, 0x54, 0x54, 0x54, 0x78,// a

0x7F, 0x48, 0x44, 0x44, 0x38,// b

0x38, 0x44, 0x44, 0x44, 0x20,// c

0x38, 0x44, 0x44, 0x48, 0x7F,// d

0x38, 0x54, 0x54, 0x54, 0x18,// e

0x08, 0x7E, 0x09, 0x01, 0x02,// f

0x08, 0x14, 0x54, 0x54, 0x3C,// g

0x7F, 0x08, 0x04, 0x04, 0x78,// h

0x00, 0x44, 0x7D, 0x40, 0x00,// i

0x20, 0x40, 0x44, 0x3D, 0x00,// j

0x00, 0x7F, 0x10, 0x28, 0x44,// k

0x00, 0x41, 0x7F, 0x40, 0x00,// l

0x7C, 0x04, 0x18, 0x04, 0x78,// m

0x7C, 0x08, 0x04, 0x04, 0x78,// n

0x38, 0x44, 0x44, 0x44, 0x38,// o

0x7C, 0x14, 0x14, 0x14, 0x08,// p

0x08, 0x14, 0x14, 0x18, 0x7C,// q

0x7C, 0x08, 0x04, 0x04, 0x08,// r

0x48, 0x54, 0x54, 0x54, 0x20,// s

0x04, 0x3F, 0x44, 0x40, 0x20,// t

0x3C, 0x40, 0x40, 0x20, 0x7C,// u

0x1C, 0x20, 0x40, 0x20, 0x1C,// v

0x3C, 0x40, 0x30, 0x40, 0x3C,// w

0x44, 0x28, 0x10, 0x28, 0x44,// x

0x0C, 0x50, 0x50, 0x50, 0x3C,// y

0x44, 0x64, 0x54, 0x4C, 0x44,// z

0x00, 0x08, 0x36, 0x41, 0x00,// {

};

 

 

/*=========================Delay function==============*/

 

void delay()

{

unsigned int i;

for(i=0;i<=30;i++);

}

 

 

/*===========================Main Function==============*/

 

void main()

{

int i,j;

PORTC=0xFF;

TRISC=0xFF;

PORTB=0x00;

TRISB=0x00;

glcd_init();      //GLCD initialization

while(1)

{

for(j=0;j<8;j++)

glcd_cmd(0xB8+j);

CS1=1;

CS2=0;

for(i=0;i<128;i++)

{

if(i==64)

{

CS1=0;

CS2=1;

}

glcd_data(ch1);

}

 

}

 

}

 

/*=======================GLCD initialization==================*/

 

void glcd_init()

{

RST=0;

delay();

RST=1;

delay();

EN=0;

CS1=0;

CS2=0;

RW=0;

RS=0;

glcd_cmd(0x3e);   // display off

glcd_cmd(0x3f);    //display on

glcd_cmd(0x40);   //

glcd_cmd(0xB8);

glcd_cmd(0xC0);

glcd_clear();

 

}

 

/*======================Glcd data function=====================*/

 

void glcd_data(unsigned char ch1)

{

RS=1;

data=ch1;

EN=1;

EN=0;

}

 

/*=======================Glcd command function================*/

 

void glcd_cmd(unsigned char x)

{

 

RS=0;

CS1=1;

CS2=1;

data=x;

EN=1;

EN=0;

}

 

/*=======================GLCD clear function====================*/

 

/*void glcd_clear()

{

int i,j;

CS1=1;

CS2=1;

for(i=0xb8;i<0xc0;i++)

{

glcd_cmd(i);

glcd_cmd(0x40);

for(j=0;j<64;j++)

glcd_data(0x00);

}

}*/

 

[AJISH ALFRED]

Hi,

Most probably, your RAM won’t be having that much space to hold the large array. Try changing its type to const char, like

const char ch1[]

so that the data goes to ROM where there will be enough space.

[Amrith]

ya ajish is right.. insufficient RAM space..

 

[baskarkkp]

sir,

 

   i also suffer by the same problem of not enough memory in this project.Pls can u say any suggestion to clear this problem.

[AJISH ALFRED]

Hi,

One method is to use the ‘const’ key word, other is to increase the stack size somehow, most of the IDEs have such an option.

[Author]

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