swapnil14327
Newbie level 5
Hello Guys,
I need help regarding Interfacing 128x64 Graphic Display and 3x4 keypad with PIC16f877a
i Have designed it as
here i have connected Keypad to port B and LCD to port C and port D.
using the below Code
when i am calling kbd_getc() function its not waiting for response on keypad;
and not showing me any number pressed on keypad
can any one please help me solve the problem..
I need help regarding Interfacing 128x64 Graphic Display and 3x4 keypad with PIC16f877a
i Have designed it as
here i have connected Keypad to port B and LCD to port C and port D.
using the below Code
Code:
//this is KBD.c
#byte kbd = 6 // on to port B (at address 6)
#define set_tris_kbd(x) set_tris_b(x)
//Keypad connection:
//
#define COL0 (1 << 5)
#define COL1 (1 << 6)
#define COL2 (1 << 7)
#define ROW0 (1 << 1)
#define ROW1 (1 << 2)
#define ROW2 (1 << 3)
#define ROW3 (1 << 4)
#define ALL_ROWS (ROW0|ROW1|ROW2|ROW3)
#define ALL_PINS (ALL_ROWS|COL0|COL1|COL2)
// Keypad layout:
char const KEYS[4][3] = {{'1','2','3'},
{'4','5','6'},
{'7','8','9'},
{'*','0','#'}};
#define KBD_DEBOUNCE_FACTOR 33 // Set this number to apx n/333 where
// n is the number of times you expect
// to call kbd_getc each second
void kbd_init() {
}
char kbd_getc( ) {
static BYTE kbd_call_count;
static int1 kbd_down;
static char last_key;
static BYTE col;
BYTE kchar;
BYTE row;
kchar='\0';
if(++kbd_call_count>KBD_DEBOUNCE_FACTOR) {
switch (col) {
case 0 : set_tris_kbd(ALL_PINS&~COL0);
kbd=~COL0&ALL_PINS;
break;
case 1 : set_tris_kbd(ALL_PINS&~COL1);
kbd=~COL1&ALL_PINS;
break;
case 2 : set_tris_kbd(ALL_PINS&~COL2);
kbd=~COL2&ALL_PINS;
break;
}
if(kbd_down) {
if((kbd & (ALL_ROWS))==(ALL_ROWS)) {
kbd_down=FALSE;
kchar=last_key;
last_key='\0';
}
} else {
if((kbd & (ALL_ROWS))!=(ALL_ROWS)) {
if((kbd & ROW0)==0)
row=0;
else if((kbd & ROW1)==0)
row=1;
else if((kbd & ROW2)==0)
row=2;
else if((kbd & ROW3)==0)
row=3;
last_key =KEYS[row][col];
kbd_down = TRUE;
} else {
++col;
if(col==3)
col=0;
}
}
kbd_call_count=0;
}
set_tris_kbd(ALL_PINS);
return(kchar);
}when i am calling kbd_getc() function its not waiting for response on keypad;
and not showing me any number pressed on keypad
Code:
//This is main.c
#include <16F877a.h>
#include <STRING.H>
#include <stddef.h>
#include <stdlib.h>
#include <ctype.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, parity=N,stop=1,xmit=PIN_C6,rcv=PIN_C7,bits=8)
#include <GLCD.C>
#include <KBD.C>
void main()
{
char temp1[]= "LCD 128x64 Test";
char temp2[]= "Hello World";
char temp3[]= "Press * To clear";
char s1[15];
char s=0;
int j=0;
*s1 = NULL;
glcd_init(ON);
kbd_init();
printf("start \n\r");
glcd_text57(0,0,temp1,1,ON);
glcd_text57(0,8,temp2,1,ON);
glcd_text57(0,16,temp3,1,ON);
while(TRUE)
{
s=kbd_getc();
sprintf(s1,"%c",s); //convert character into array
glcd_text57((0+j),30,s1,1,ON); //adding to print the space to GLCD
printf("%c \n\r",s); //data for RS232
j+=10;
delay_ms(250);
}while(s!='1');
}
Code:
//code for GLCD.c
/////////////////////////////////////////////////////////////////////////
//// GLCD.C ////
//// ////
//// This file contains drivers for using a Hantronix HDM64GS12 with ////
//// an LED backlight. The HDM64GS12 is 128 pixles across and 64 ////
//// pixels down. The driver treats the upper left pixel as (0,0). ////
//// ////
//// LCD Pin connections: ////
//// (These can be changed as needed in the following defines). ////
//// * 1: VSS is connected to GND ////
//// * 2: VDD is connected to +5V ////
//// * 3: V0 - LCD operating voltage is connected from a 20k Ohm POT////
//// * 4: D/I - Data or Instruction is connected to B2 ////
//// * 5: R/W - Read or Write is connected to B4 ////
//// * 6: Enable is connected to B5 ////
//// *7-14: Data Bus 0 to 7 is connected to port d ////
//// *15: Chip Select 1 is connected to B0 ////
//// *16: Chip Select 2 is connected to B1 ////
//// *17: Reset is connected to C0 ////
//// *18: Negative voltage is also connected to the 20k Ohm POT ////
//// *19: Positive voltage for LED backlight is connected to +5V ////
//// *20: Negavtive voltage for LED backlight is connected to GND ////
//// ////
//// glcd_init(mode) ////
//// * Must be called before any other function. ////
//// - mode can be ON or OFF to turn the LCD on or off ////
//// ////
//// glcd_pixel(x,y,color) ////
//// * Sets the pixel to the given color. ////
//// - color can be ON or OFF ////
//// ////
//// glcd_line(x1,y1,x2,y2,color) ////
//// * Draws a line from the first point to the second point ////
//// with the given color. ////
//// - color can be ON or OFF ////
//// ////
//// glcd_rect(x1,y1,x2,y2,fill,color) ////
//// * Draws a rectangle with upper left point (x1,y1) and lower ////
//// right point (x2,y2). ////
//// - fill can be YES or NO ////
//// - color can be ON or OFF ////
//// ////
//// glcd_bar(x1,y1,x2,y2,width,color) ////
//// * Draws a bar (wide line) from the first point to the ////
//// second point. ////
//// - width is the number of pixels wide ////
//// - color is ON or OFF ////
//// ////
//// glcd_circle(x,y,radius,fill,color) ////
//// * Draws a circle with center at (x,y) ////
//// - fill can be YES or NO ////
//// - color can be ON or OFF ////
//// ////
//// glcd_text57(x,y,textptr,size,color) ////
//// * Write the null terminated text pointed to by textptr with ////
//// the upper left coordinate of the first character at (x,y).////
//// Characters are 5 pixels wide and 7 pixels tall. ////
//// - size is an integer that scales the size of the text ////
//// - color is ON or OFF ////
//// * Note - The given text is character wrapped. If this ////
//// function is used on a different size display, then change ////
//// the GLCD_WIDTH define appropriately. ////
//// ////
//// glcd_fillScreen(color) ////
//// * Fills the entire LCD with the given color. ////
//// - color can be ON or OFF ////
//// ////
/////////////////////////////////////////////////////////////////////////
//// (C) Copyright 1996,2003 Custom Computer Services ////
//// This source code may only be used by licensed users of the CCS ////
//// C compiler. This source code may only be distributed to other ////
//// licensed users of the CCS C compiler. No other use, ////
//// reproduction or distribution is permitted without written ////
//// permission. Derivative programs created using this software ////
//// in object code form are not restricted in any way. ////
/////////////////////////////////////////////////////////////////////////
#ifndef GLCD_C
#define GLCD_C
#ifndef GLCD_WIDTH
#define GLCD_WIDTH 128 // Used for text wrapping by glcd_text57 function
#endif
#define ON 1
#define OFF 0
#define YES 1
#define NO 0
#ifndef GLCD_CS1
#define GLCD_CS1 PIN_C0 // Chip Selection 1
#endif
#ifndef GLCD_CS2
#define GLCD_CS2 PIN_C1 // Chip Selection 2
#endif
#ifndef GLCD_DI
#define GLCD_DI PIN_C2 // Data or Instruction input
#endif
#ifndef GLCD_RW
#define GLCD_RW PIN_C4 // Read/Write
#endif
#ifndef GLCD_E
#define GLCD_E PIN_C5 // Enable
#endif
#ifndef GLCD_RST
#define GLCD_RST PIN_C3 // Reset
#endif
BYTE glcd_readByte(BYTE chip);
void glcd_writeByte(BYTE chip, BYTE data);
void glcd_fillScreen(int1 color);
const BYTE TEXT[51][5] ={0x00, 0x00, 0x00, 0x00, 0x00, // SPACE
0x00, 0x00, 0x5F, 0x00, 0x00, // !
0x00, 0x03, 0x00, 0x03, 0x00, // "
0x14, 0x3E, 0x14, 0x3E, 0x14, // #
0x24, 0x2A, 0x7F, 0x2A, 0x12, // $
0x43, 0x33, 0x08, 0x66, 0x61, // %
0x36, 0x49, 0x55, 0x22, 0x50, // &
0x00, 0x05, 0x03, 0x00, 0x00, // '
0x00, 0x1C, 0x22, 0x41, 0x00, // (
0x00, 0x41, 0x22, 0x1C, 0x00, // )
0x14, 0x08, 0x3E, 0x08, 0x14, // *
0x08, 0x08, 0x3E, 0x08, 0x08, // +
0x00, 0x50, 0x30, 0x00, 0x00, // ,
0x08, 0x08, 0x08, 0x08, 0x08, // -
0x00, 0x60, 0x60, 0x00, 0x00, // .
0x20, 0x10, 0x08, 0x04, 0x02, // /
0x3E, 0x51, 0x49, 0x45, 0x3E, // 0
0x04, 0x02, 0x7F, 0x00, 0x00, // 1
0x42, 0x61, 0x51, 0x49, 0x46, // 2
0x22, 0x41, 0x49, 0x49, 0x36, // 3
0x18, 0x14, 0x12, 0x7F, 0x10, // 4
0x27, 0x45, 0x45, 0x45, 0x39, // 5
0x3E, 0x49, 0x49, 0x49, 0x32, // 6
0x01, 0x01, 0x71, 0x09, 0x07, // 7
0x36, 0x49, 0x49, 0x49, 0x36, // 8
0x26, 0x49, 0x49, 0x49, 0x3E, // 9
0x00, 0x36, 0x36, 0x00, 0x00, // :
0x00, 0x56, 0x36, 0x00, 0x00, // ;
0x08, 0x14, 0x22, 0x41, 0x00, // <
0x14, 0x14, 0x14, 0x14, 0x14, // =
0x00, 0x41, 0x22, 0x14, 0x08, // >
0x02, 0x01, 0x51, 0x09, 0x06, // ?
0x3E, 0x41, 0x59, 0x55, 0x5E, // @
0x7E, 0x09, 0x09, 0x09, 0x7E, // A
0x7F, 0x49, 0x49, 0x49, 0x36, // B
0x3E, 0x41, 0x41, 0x41, 0x22, // C
0x7F, 0x41, 0x41, 0x41, 0x3E, // D
0x7F, 0x49, 0x49, 0x49, 0x41, // E
0x7F, 0x09, 0x09, 0x09, 0x01, // F
0x3E, 0x41, 0x41, 0x49, 0x3A, // G
0x7F, 0x08, 0x08, 0x08, 0x7F, // H
0x00, 0x41, 0x7F, 0x41, 0x00, // I
0x30, 0x40, 0x40, 0x40, 0x3F, // J
0x7F, 0x08, 0x14, 0x22, 0x41, // K
0x7F, 0x40, 0x40, 0x40, 0x40, // L
0x7F, 0x02, 0x0C, 0x02, 0x7F, // M
0x7F, 0x02, 0x04, 0x08, 0x7F, // N
0x3E, 0x41, 0x41, 0x41, 0x3E, // O
0x7F, 0x09, 0x09, 0x09, 0x06, // P
0x1E, 0x21, 0x21, 0x21, 0x5E, // Q
0x7F, 0x09, 0x09, 0x09, 0x76};// R
const BYTE TEXT2[44][5]={0x26, 0x49, 0x49, 0x49, 0x32, // S
0x01, 0x01, 0x7F, 0x01, 0x01, // T
0x3F, 0x40, 0x40, 0x40, 0x3F, // U
0x1F, 0x20, 0x40, 0x20, 0x1F, // V
0x7F, 0x20, 0x10, 0x20, 0x7F, // W
0x41, 0x22, 0x1C, 0x22, 0x41, // X
0x07, 0x08, 0x70, 0x08, 0x07, // Y
0x61, 0x51, 0x49, 0x45, 0x43, // Z
0x00, 0x7F, 0x41, 0x00, 0x00, // [
0x02, 0x04, 0x08, 0x10, 0x20, // \
0x00, 0x00, 0x41, 0x7F, 0x00, // ]
0x04, 0x02, 0x01, 0x02, 0x04, // ^
0x40, 0x40, 0x40, 0x40, 0x40, // _
0x00, 0x01, 0x02, 0x04, 0x00, // `
0x20, 0x54, 0x54, 0x54, 0x78, // a
0x7F, 0x44, 0x44, 0x44, 0x38, // b
0x38, 0x44, 0x44, 0x44, 0x44, // c
0x38, 0x44, 0x44, 0x44, 0x7F, // d
0x38, 0x54, 0x54, 0x54, 0x18, // e
0x04, 0x04, 0x7E, 0x05, 0x05, // f
0x08, 0x54, 0x54, 0x54, 0x3C, // g
0x7F, 0x08, 0x04, 0x04, 0x78, // h
0x00, 0x44, 0x7D, 0x40, 0x00, // i
0x20, 0x40, 0x44, 0x3D, 0x00, // j
0x7F, 0x10, 0x28, 0x44, 0x00, // k
0x00, 0x41, 0x7F, 0x40, 0x00, // l
0x7C, 0x04, 0x78, 0x04, 0x78, // m
0x7C, 0x08, 0x04, 0x04, 0x78, // n
0x38, 0x44, 0x44, 0x44, 0x38, // o
0x7C, 0x14, 0x14, 0x14, 0x08, // p
0x08, 0x14, 0x14, 0x14, 0x7C, // q
0x00, 0x7C, 0x08, 0x04, 0x04, // r
0x48, 0x54, 0x54, 0x54, 0x20, // s
0x04, 0x04, 0x3F, 0x44, 0x44, // 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, 0x41, // {
0x00, 0x00, 0x7F, 0x00, 0x00, // |
0x41, 0x41, 0x36, 0x08, 0x00, // }
0x02, 0x01, 0x02, 0x04, 0x02};// ~
// Purpose: Initialize a graphic LCD. This must be called before any
// other glcd function is used.
// Inputs: The initialization mode
// OFF - Turns the LCD off
// ON - Turns the LCD on
// Date: 5/28/2003
void glcd_init(int1 mode)
{
// Initialze some pins
output_high(GLCD_RST);
output_low(GLCD_E);
output_low(GLCD_CS1);
output_low(GLCD_CS2);
output_low(GLCD_DI); // Set for instruction
glcd_writeByte(GLCD_CS1, 0xC0); // Specify first RAM line at the top
glcd_writeByte(GLCD_CS2, 0xC0); // of the screen
glcd_writeByte(GLCD_CS1, 0x40); // Set the column address to 0
glcd_writeByte(GLCD_CS2, 0x40);
glcd_writeByte(GLCD_CS1, 0xB8); // Set the page address to 0
glcd_writeByte(GLCD_CS2, 0xB8);
if(mode == ON)
{
glcd_writeByte(GLCD_CS1, 0x3F); // Turn the display on
glcd_writeByte(GLCD_CS2, 0x3F);
}
else
{
glcd_writeByte(GLCD_CS1, 0x3E); // Turn the display off
glcd_writeByte(GLCD_CS2, 0x3E);
}
glcd_fillScreen(OFF); // Clear the display
}
// Purpose: Turn a pixel on a graphic LCD on or off
// Inputs: x - the x coordinate of the pixel
// y - the y coordinate of the pixel
// color - ON or OFF
// Output: 1 if coordinate out of range, 0 if in range
void glcd_pixel(int x, int y, int1 color)
{
BYTE data;
BYTE chip = GLCD_CS1; // Stores which chip to use on the LCD
if(x > 63) // Check for first or second display area
{
x -= 64;
chip = GLCD_CS2;
}
output_low(GLCD_DI); // Set for instruction
bit_clear(x,7); // Clear the MSB. Part of an instruction code
bit_set(x,6); // Set bit 6. Also part of an instruction code
glcd_writeByte(chip, x); // Set the horizontal address
glcd_writeByte(chip, (y/8 & 0b10111111) | 0b10111000); // Set the vertical page address
output_high(GLCD_DI); // Set for data
data = glcd_readByte(chip);
if(color == ON)
bit_set(data, y%8); // Turn the pixel on
else // or
bit_clear(data, y%8); // turn the pixel off
output_low(GLCD_DI); // Set for instruction
glcd_writeByte(chip, x); // Set the horizontal address
output_high(GLCD_DI); // Set for data
glcd_writeByte(chip, data); // Write the pixel data
}
// Purpose: Draw a line on a graphic LCD using Bresenham's
// line drawing algorithm
// Inputs: (x1, y1) - the start coordinate
// (x2, y2) - the end coordinate
// color - ON or OFF
// Dependencies: glcd_pixel()
void glcd_line(int x1, int y1, int x2, int y2, int1 color)
{
signed int x, y, addx, addy, dx, dy;
signed long P;
int i;
dx = abs((signed int)(x2 - x1));
dy = abs((signed int)(y2 - y1));
x = x1;
y = y1;
if(x1 > x2)
addx = -1;
else
addx = 1;
if(y1 > y2)
addy = -1;
else
addy = 1;
if(dx >= dy)
{
P = 2*dy - dx;
for(i=0; i<=dx; ++i)
{
glcd_pixel(x, y, color);
if(P < 0)
{
P += 2*dy;
x += addx;
}
else
{
P += 2*dy - 2*dx;
x += addx;
y += addy;
}
}
}
else
{
P = 2*dx - dy;
for(i=0; i<=dy; ++i)
{
glcd_pixel(x, y, color);
if(P < 0)
{
P += 2*dx;
y += addy;
}
else
{
P += 2*dx - 2*dy;
x += addx;
y += addy;
}
}
}
}
// Purpose: Draw a rectangle on a graphic LCD
// Inputs: (x1, y1) - the start coordinate
// (x2, y2) - the end coordinate
// fill - YES or NO
// color - ON or OFF
// Dependencies: glcd_pixel(), glcd_line()
void glcd_rect(int x1, int y1, int x2, int y2, int fill, int1 color)
{
if(fill)
{
int y, ymax; // Find the y min and max
if(y1 < y2)
{
y = y1;
ymax = y2;
}
else
{
y = y2;
ymax = y1;
}
for(; y<=ymax; ++y) // Draw lines to fill the rectangle
glcd_line(x1, y, x2, y, color);
}
else
{
glcd_line(x1, y1, x2, y1, color); // Draw the 4 sides
glcd_line(x1, y2, x2, y2, color);
glcd_line(x1, y1, x1, y2, color);
glcd_line(x2, y1, x2, y2, color);
}
}
// Purpose: Draw a bar (wide line) on a graphic LCD
// Inputs: (x1, y1) - the start coordinate
// (x2, y2) - the end coordinate
// width - The number of pixels wide
// color - ON or OFF
void glcd_bar(int x1, int y1, int x2, int y2, int width, int1 color)
{
signed int x, y, addx, addy, j;
signed long P, dx, dy, c1, c2;
int i;
dx = abs((signed int)(x2 - x1));
dy = abs((signed int)(y2 - y1));
x = x1;
y = y1;
c1 = -dx*x1 - dy*y1;
c2 = -dx*x2 - dy*y2;
if(x1 > x2)
{
addx = -1;
c1 = -dx*x2 - dy*y2;
c2 = -dx*x1 - dy*y1;
}
else
addx = 1;
if(y1 > y2)
{
addy = -1;
c1 = -dx*x2 - dy*y2;
c2 = -dx*x1 - dy*y1;
}
else
addy = 1;
if(dx >= dy)
{
P = 2*dy - dx;
for(i=0; i<=dx; ++i)
{
for(j=-(width/2); j<width/2+width%2; ++j)
{
if(dx*x+dy*(y+j)+c1 >= 0 && dx*x+dy*(y+j)+c2 <=0)
glcd_pixel(x, y+j, color);
}
if(P < 0)
{
P += 2*dy;
x += addx;
}
else
{
P += 2*dy - 2*dx;
x += addx;
y += addy;
}
}
}
else
{
P = 2*dx - dy;
for(i=0; i<=dy; ++i)
{
if(P < 0)
{
P += 2*dx;
y += addy;
}
else
{
P += 2*dx - 2*dy;
x += addx;
y += addy;
}
for(j=-(width/2); j<width/2+width%2; ++j)
{
if(dx*x+dy*(y+j)+c1 >= 0 && dx*x+dy*(y+j)+c2 <=0)
glcd_pixel(x+j, y, color);
}
}
}
}
// Purpose: Draw a circle on a graphic LCD
// Inputs: (x,y) - the center of the circle
// radius - the radius of the circle
// fill - YES or NO
// color - ON or OFF
void glcd_circle(int x, int y, int radius, int1 fill, int1 color)
{
signed int a, b, P;
a = 0;
b = radius;
P = 1 - radius;
do
{
if(fill)
{
glcd_line(x-a, y+b, x+a, y+b, color);
glcd_line(x-a, y-b, x+a, y-b, color);
glcd_line(x-b, y+a, x+b, y+a, color);
glcd_line(x-b, y-a, x+b, y-a, color);
}
else
{
glcd_pixel(a+x, b+y, color);
glcd_pixel(b+x, a+y, color);
glcd_pixel(x-a, b+y, color);
glcd_pixel(x-b, a+y, color);
glcd_pixel(b+x, y-a, color);
glcd_pixel(a+x, y-b, color);
glcd_pixel(x-a, y-b, color);
glcd_pixel(x-b, y-a, color);
}
if(P < 0)
P+= 3 + 2*a++;
else
P+= 5 + 2*(a++ - b--);
} while(a <= b);
}
// Purpose: Write text on a graphic LCD
// Inputs: (x,y) - The upper left coordinate of the first letter
// textptr - A pointer to an array of text to display
// size - The size of the text: 1 = 5x7, 2 = 10x14, ...
// color - ON or OFF
void glcd_text57(int x, int y, char* textptr, int size, int1 color)
{
int i, j, k, l, m; // Loop counters
BYTE pixelData[5]; // Stores character data
for(i=0; textptr[i] != '\0'; ++i, ++x) // Loop through the passed string
{
if(textptr[i] < 'S') // Checks if the letter is in the first text array
memcpy(pixelData, TEXT[textptr[i]-' '], 5);
else if(textptr[i] <= '~') // Check if the letter is in the second array
memcpy(pixelData, TEXT2[textptr[i]-'S'], 5);
else
memcpy(pixelData, TEXT[0], 5); // Default to space
if(x+5*size >= GLCD_WIDTH) // Performs character wrapping
{
x = 0; // Set x at far left position
y += 7*size + 1; // Set y at next position down
}
for(j=0; j<5; ++j, x+=size) // Loop through character byte data
{
for(k=0; k<7*size; ++k) // Loop through the vertical pixels
{
if(bit_test(pixelData[j], k)) // Check if the pixel should be set
{
for(l=0; l<size; ++l) // The next two loops change the
{ // character's size
for(m=0; m<size; ++m)
{
glcd_pixel(x+m, y+k*size+l, color); // Draws the pixel
}
}
}
}
}
}
}
// Purpose: Fill the LCD screen with the passed in color.
// Works much faster than drawing a rectangle to fill the screen.
// Inputs: ON - turn all the pixels on
// OFF - turn all the pixels off
// Dependencies: glcd_writeByte()
void glcd_fillScreen(int1 color)
{
int i, j;
// Loop through the vertical pages
for(i = 0; i < 8; ++i)
{
output_low(GLCD_DI); // Set for instruction
glcd_writeByte(GLCD_CS1, 0b01000000); // Set horizontal address to 0
glcd_writeByte(GLCD_CS2, 0b01000000);
glcd_writeByte(GLCD_CS1, i | 0b10111000); // Set page address
glcd_writeByte(GLCD_CS2, i | 0b10111000);
output_high(GLCD_DI); // Set for data
// Loop through the horizontal sections
for(j = 0; j < 64; ++j)
{
glcd_writeByte(GLCD_CS1, 0xFF*color); // Turn pixels on or off
glcd_writeByte(GLCD_CS2, 0xFF*color); // Turn pixels on or off
}
}
}
// Purpose: Write a byte of data to the specified chip
// Inputs: chipSelect - which chip to write the data to
// data - the byte of data to write
void glcd_writeByte(char chip, BYTE data)
{
if(chip == GLCD_CS1) // Choose which chip to write to
output_high(GLCD_CS1);
else
output_high(GLCD_CS2);
output_low(GLCD_RW); // Set for writing
output_d(data); // Put the data on the port
output_high(GLCD_E); // Pulse the enable pin
delay_us(2);
output_low(GLCD_E);
output_low(GLCD_CS1); // Reset the chip select lines
output_low(GLCD_CS2);
}
// Purpose: Reads a byte of data from the specified chip
// Ouputs: A byte of data read from the chip
BYTE glcd_readByte(BYTE chip)
{
BYTE data; // Stores the data read from the LCD
if(chip == GLCD_CS1) // Choose which chip to read from
output_high(GLCD_CS1);
else
output_high(GLCD_CS2);
input_d(); // Set port d to input
output_high(GLCD_RW); // Set for reading
output_high(GLCD_E); // Pulse the enable pin
delay_us(2);
output_low(GLCD_E);
delay_us(2);
output_high(GLCD_E); // Pulse the enable pin
delay_us(2);
data = input_d(); // Get the data from the display's output register
output_low(GLCD_E);
output_low(GLCD_CS1); // Reset the chip select lines
output_low(GLCD_CS2);
return data; // Return the read data
}
#endifcan any one please help me solve the problem..