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);

}

}