yejing.c

滚屏液晶显示1602 含1602经典应用函数。

#include<reg52.h>
sbit rs=P2^0;
sbit rw=P2^1;
sbit en=P2^2;

unsigned char table[]="HAPPY BIRTHDAY!";
unsigned char table1[]=" I am your gift!";//zi fu to input

void delay(unsigned int z)
{
	unsigned int x;
	unsigned int y;
	for(x=z;x>0;x--)
		for(y=110;y>0;y--);
}

void write_order(unsigned char z)
{
	rs=0;
	rw=0;
	P0=z;
	delay(1);
	en=1;
	delay(1);
	en=0;
	delay(1);
}

void write_data(unsigned char z)
{
	rs=1;
	rw=0;
	P0=z;
	delay(1);
	en=1;
	delay(1);
	en=0;
	delay(1);	
}

void init()
{
	write_order(0x38);
	write_order(0x0c);
	write_order(0x06);
	write_order(0x01);
//	write_order(0x80+8);
}

void move(unsigned int z)
{
	int i;
	rs=0;
	rw=0;
	for(i=0;i<z;i++)
	{
		delay(500);
		write_order(0x18);
	}
}

void where(unsigned char z)
{
	write_order(z);
}	

void write_sentence(unsigned char* table,unsigned int lon)
{
	int i;
	for(i=0;i<lon;i++)
		write_data(table[i]);	
}

void main()
{	
	init();
	while(1)
	{
		where(0x80+16);
		write_sentence(table,15);
		where(0x80+0x40+16);
		write_sentence(table1,16);
		move(32);
	}		
}