Microcontroller LCD Experiment 1-EEWORLD

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code show as below:

//filename:global.h

#include

//#include

#define uchar unsigned char

#define uint unsigned int

//filename:T6963C.H

#define DATA_PORT P0

//-------------------------------------------

// Pin definition

//------------------------------------------

sbit CD=P2^0; //Data (L)/Command (H) selection

sbit WRIT=P2^1; //write, low level is valid

sbit CE=P2^2; //Enable, low level is effective

//===========================================

// Function declaration

//-------------------------------------------

void delay_lcd(char);

void write_data(char);

void write_text(char);

void write_com(char);

void clr_lcd(char,char,int);

void lcd_init_graph();

void lcd_init_text();

void text_out(char a);

int asc2lcd(int asc);

//--------------------------------------------

// Write data function

//--------------------------------------------

void write_data(char dat){

CD=0; //data

CE=0; //LCD enable

WRIT=0; //write

DATA_PORT=dat; //Send data to port P

delay_lcd(1); //Add delay when the crystal oscillator is high

WRIT=1; //Close writing

CE=1; //disable enable

}

//--------------------------------------------

// Write data function

//--------------------------------------------

void write_text(char text){

CD=0; //data

CE=0; //LCD enable

WRIT=0; //write

DATA_PORT=text; //Send data to port P

delay_lcd(1); //Add delay when the crystal oscillator is high

WRIT=1; //Close writing

CE=1; //disable enable

}

//--------------------------------------------

// Write command function

//--------------------------------------------

void write_com(char com){

CD=1; //command

CE=0;

WRIT=0;

DATA_PORT=com;

delay_lcd(1); //Add delay when the crystal oscillator is high

WRIT=1;

CE=1;

}

void clr_lcd(char x,char y,int length){

int i,place;

place=x*30+y;

write_data(place&0xff);

write_data(place/256);

write_com(0x24); //Set

for(i=0;i

write_data(0xff); //Write a space and clear the screen

write_com(0xb2); //turn off automatic writing

}

//--------------------------------------------

// LM4229 initialization function

//--------------------------------------------

void lcd_init_graph(){

write_data(0); //Graphics first address

write_data(0);

write_com(0x42); //Set the first address of the graphics

write_data(30);

write_data(0);

write_com(0x43); //Graphics area settings

write_com(0x80); //Set to OR mode

write_com(0x98); //Turn off text display and turn on graphic display

}

//--------------------------------------------

// LM4229 initialization function

//--------------------------------------------

void lcd_init_text(){

write_data(0);

write_com(0x40); //set text home address

write_data(30);

write_data(0);

write_com(0x41); //set text area;

write_com(0x84); //text attribute mode

write_com(0x94); //text on graphic off

}

void cursor_on(){

write_com(0xA0);

write_com(0x93);

write_com(0x94); //text on graphic off

}

void print_text(char x,char y,char a){

int place;

place=x*30+y;

write_data(place&0xff); //write address lower 8 bits

write_data(place/256); //write address high 8 bits

write_com(0x24); //Set address

write_com(0xb0); //Set data to be written automatically

write_text(a);

write_com(0xb2); //Automatic reset

}

void text_out(char a){

write_com(0xb0); //Set data to be written automatically

write_text(a);

write_com(0xb2); //Automatic reset

}

void text_location(int place){

write_data(place&0xff); //write address lower 8 bits

write_data(place/256); //write address high 8 bits

write_com(0x24); //Set address

}

void print_string(char* str){

int i;

int ch;

for(i=0;str[i]!=0;i++)

{

ch=asc2lcd(str[i]);

text_out(ch);

}

//--------------------------------------------

// Delay function

//--------------------------------------------

void delay_lcd(uchar t){

for(;t!=0; t--);

}

//===================================================

int asc2lcd(int asc){

uint r;

r=asc-32;

return r;

}

//latest revise:2010-2-11

//by:alex shoal

//email:alex.shoal@gmail.com

main(){

int place=5;

char ch=0x00;

lcd_init_text();

text_location(place);

print_string("Hello,china! ");

while(1);

}

Keywords：MCU Reference address：Microcontroller LCD Experiment 1

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