51单片机系列之LCD1602

名称:LCD1602液晶屏显示(并口) 

平台:Keil 4, Ly-51S学习板 

引脚定义如下：1-VSS 2-VDD 3-V0 4-RS 5-R/W 6-E 7-14 DB0-DB7 15-BLA 16-BLK 

与51连接: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;  

/*判忙函数*/ 

bit LCD_check_busy() {  

    DB = 0xFF;  

    RS = 0;  

    RW = 1;  

    EN = 0;  

    EN = 1;  

    return  (bit)(DB & 0x80);  

}  

/*写入命令函数*/ 

void LCD_write_com(unsigned char com) {  

    while(LCD_check_busy());//忙则等待  

    RS = 0;  

    RW = 0;  

    EN = 1;  

    DB = com;  

    EN = 0;  

}  

/*写入数据函数*/ 

void LCD_write_data(unsigned char dat) {  

    while(LCD_check_busy());//忙则等待  

    RS = 1;  

    RW = 0;  

    EN = 1;  

    DB = dat;  

    EN = 0;  

}  

/*在y(0-1)行,x列(0-15)写入字符串函数*/ 

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 ++;  

    }  

}  

/*写入字符函数*/ 

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);  

}  

/*清屏函数*/ 

void LCD_clear() {  

    LCD_write_com(0x01);  

}  

/*初始化函数*/ 

void LCD_init() {  

    LCD_write_com(0x38);/*显示模式设置*/  

    LCD_write_com(0x08);/*显示关闭*/  

    LCD_write_com(0x01);/*显示清屏*/  

    LCD_write_com(0x06);/*显示光标移动设置*/  

    LCD_write_com(0x0C);/*显示开及光标设置*/     

}  

/*主函数*/ 

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);  

    }  

}