名稱:LCD1602液晶屏顯示(并口)

平臺:Keil 4, Ly-51S學習板

引腳定義如下：1-VSS 2-VDD 3-V0 4-RS 5-R/W 6-E 7-14 DB0-DB7 15-BLA 16-BLK

與51連接:RS-P2.4 RW-P2.5 EN-P2.6 DB-P0

-----------------------------------------------------*/

#include

#define DB P0

sbit RS =P2^4;

sbit RW =P2^5;

sbit EN =P2^6;

/*判忙函數*/

bit LCD_check_busy() {

DB = 0xFF;

RS = 0;

RW = 1;

EN = 0;

EN = 1;

return (bit)(DB & 0x80);

}

/*寫入命令函數*/

void LCD_write_com(unsigned char com) {

while(LCD_check_busy());//忙則等待

RS = 0;

RW = 0;

EN = 1;

DB = com;

EN = 0;

}

/*寫入數據函數*/

void LCD_write_data(unsigned char dat) {

while(LCD_check_busy());//忙則等待

RS = 1;

RW = 0;

EN = 1;

DB = dat;

EN = 0;

}

/*在y(0-1)行,x列(0-15)寫入字符串函數*/

void LCD_write_string(unsigned char x, unsigned char y, unsigned char *s) {

if(0==y) LCD_write_com(0x80 + x);

else LCD_write_com(0xC0 + x);

while(*s) {

LCD_write_data(*s);

s ++;

}

}

/*寫入字符函數*/

void LCD_write_char(unsigned char x, unsigned char y, unsigned char dat) {

if(0==y) LCD_write_com(0x80 + x);

else LCD_write_com(0xC0 + x);

LCD_write_data(dat);

}

/*清屏函數*/

void LCD_clear() {

LCD_write_com(0x01);

}

/*初始化函數*/

void LCD_init() {

LCD_write_com(0x38);/*顯示模式設置*/

LCD_write_com(0x08);/*顯示關閉*/

LCD_write_com(0x01);/*顯示清屏*/

LCD_write_com(0x06);/*顯示光標移動設置*/

LCD_write_com(0x0C);/*顯示開及光標設置*/

}

/*主函數*/

void main() {

while(1) {

LCD_init();

LCD_write_char(0,0,'*');

LCD_write_string(1,0,"I'm Chinese.**");

LCD_write_string(0,1,"Happy,hellofuxin");

LCD_write_char(15,0,'!');

while(1);

}

}