單片機LCD實驗1

作者：時間：2016-11-21 來源：網絡

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代碼如下：

//filename:global.h

#include

//#include

#define uchar unsigned char

#define uint unsigned int

//filename:T6963C.H

#define DATA_PORT P0

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

// 管腳定義

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

sbit CD=P2^0; //數(shù)據(jù)(L)/命令(H)選擇

sbit WRIT=P2^1; //寫，低電平有效

sbit CE=P2^2; //使能,低電平有效

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

// 函數(shù)聲明

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

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);

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

// 寫數(shù)據(jù)函數(shù)

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

void write_data(char dat){

CD=0; //數(shù)據(jù)

CE=0; //LCD使能

WRIT=0; //寫

DATA_PORT=dat; //把數(shù)據(jù)送到P口

delay_lcd(1); //當晶振較高時加延時

WRIT=1; //關寫

CE=1; //關使能

}

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

// 寫數(shù)據(jù)函數(shù)

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

void write_text(char text){

CD=0; //數(shù)據(jù)

CE=0; //LCD使能

WRIT=0; //寫

DATA_PORT=text; //把數(shù)據(jù)送到P口

delay_lcd(1); //當晶振較高時加延時

WRIT=1; //關寫

CE=1; //關使能

}

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

// 寫命令函數(shù)

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

void write_com(char com){

CD=1; //命令

CE=0;

WRIT=0;

DATA_PORT=com;

delay_lcd(1); //當晶振較高時加延時

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); //設置

for(i=0;i

write_data(0xff); //寫入空格，清屏

write_com(0xb2); //關閉自動寫

}

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

// LM4229初始化函數(shù)

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

void lcd_init_graph(){

write_data(0); //圖形首地址

write_data(0);

write_com(0x42); //圖形首地址設置

write_data(30);

write_data(0);

write_com(0x43); //圖形區(qū)域設置

write_com(0x80); //設置為OR模式

write_com(0x98); //關閉文本顯示,開圖形顯示

}

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

// LM4229初始化函數(shù)

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

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); //寫地址低8位

write_data(place/256); //寫地址高8位

write_com(0x24); //設置地址

write_com(0xb0); //設置數(shù)據(jù)自動寫

write_text(a);

write_com(0xb2); //自動復位

}

void text_out(char a){

write_com(0xb0); //設置數(shù)據(jù)自動寫

write_text(a);

write_com(0xb2); //自動復位

}

void text_location(int place){

write_data(place&0xff); //寫地址低8位

write_data(place/256); //寫地址高8位

write_com(0x24); //設置地址

}

void print_string(char* str){

int i;

int ch;

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

{

ch=asc2lcd(str[i]);

text_out(ch);

}

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

// 延時函數(shù)

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

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:[email protected]

main(){

int place=5;

char ch=0x00;

lcd_init_text();

text_location(place);

print_string("Hello,china! ");

while(1);

}

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