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單片機LCD實驗1

作者： 時間：2016-11-21 來源：網(wǎng)絡(luò) 收藏
代碼如下：
//filename:global.h
#include
//#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(guān)寫
CE=1; //關(guān)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(guān)寫
CE=1; //關(guān)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(shè)置
for(i=0;i
write_data(0xff); //寫入空格，清屏
write_com(0xb2); //關(guān)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(shè)置
write_data(30);
write_data(0);
write_com(0x43); //圖形區(qū)域設(shè)置
write_com(0x80); //設(shè)置為OR模式
write_com(0x98); //關(guān)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_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(shè)置地址
write_com(0xb0); //設(shè)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(shè)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(shè)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:alex.shoal@gmail.com
main(){
int place=5;
char ch=0x00;
lcd_init_text();
text_location(place);
print_string("Hello,china! ");
while(1);
}

關(guān)鍵詞： 單片機LCD實

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