1602

1602字符滚动显示

#include<reg51.h>
#define uchar unsigned char 
#define uint unsigned int
sbit rs=P2^0;
sbit rw=P2^1;
sbit en=P2^2;
uchar code tab1[]= "I LIKE MCU";
uchar code tab2[]="I LOVE YOU";
void delay(uint z)
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=112;y>0;y--);
}
uchar busy_check()
{
	uchar state;
	rs=0;
	rw=1;
	delay(5);
	en=1;
	state=P0;
	delay(5);
	en=0;
	delay(5);
	return state;
}
void write_com(uchar com)
{
	while((busy_check()&0x80)==0x80);
	rs=0;
	rw=0;
	delay(5);
	en=1;
	P0=com;
	delay(5);
 	en=0;
	delay(5);
}
void write_data(uchar dat)
{
	while((busy_check()&0x80)==0x80);
	rs=1;
	rw=0;
	delay(5);
	en=1;
	P0=dat;
	delay(5);
	en=0;
	delay(5);
}
void init()
{
	write_com(0x38);
	write_com(0x0c);
	write_com(0x06);
	write_com(0x01);
}
void main()
{
	uchar i;
	init();
	write_com(0x80+0x03);
	for(i=0;i<10;i++)
	{
		write_data(tab1[i]);
		delay(50);
	}
	write_com(0x80+0x43);
	for(i=0;i<10;i++)
	{
		write_data(tab2[i]);
		delay(50);
	}					 
	for(i=0;i<13;i++)
	{
		write_com(0x1c);
		delay(200);
	}
	for(i=0;i<16;i++)
	{
		write_com(0x18);
		delay(200);
	}
	write_com(0x01);
	delay(500);
}