1602.c

模块化的液晶显示范例

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit lcden=P3^4;
sbit lcdrs=P3^5;

#define DataPort P0  
uchar num;

void delay(uint z)      //延时子函数
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=124;y>0;y--);	
}

void write_com(uchar com)   //写指令
{
	lcdrs=0;
	DataPort=com;
	delay(5);
	lcden=1;
	delay(5);
	lcden=0;
}

void write_data(uchar date)   //写数据
{
	lcdrs=1;
	DataPort=date;
	delay(5);
	lcden=1;
	delay(5);
	lcden=0;
}

void init()   //初始化液晶
{
	lcden=0;
	write_com(0x38);  //xianshi shezi
	write_com(0x0f);  //0x0f光标闪烁，0x0e不闪烁 0x0c不显示光标
	write_com(0x06);  //光标自动加一，整屏不移动
	write_com(0x01);  //清屏
	write_com(0x80);  //数据指针初始化
}

void lcd_mov(uchar x)//整屏移动
{
	uchar num;
	for(num=0;num<x;num++)
	{
		write_com(0x1c);//资料上0x18是左移，但这里用0x1c才能左移
		delay(200);	
	}
}

void GotoXY(unsigned char x, unsigned char y)
{
	if(y==0)
	write_com(0x80|x);
	if(y==1)
	write_com(0x80|(x-0x40));
}
void Print(unsigned char *str)
{
	while(*str!='\0')
	{
		write_data(*str);
		str++;
	}
}

void main()
{
	init();
	GotoXY(10,0);
	Print("I LOVE YOU");
	lcd_mov(10);
	while(1);	
}