LCD1602动态显示

#include 
#include

typedef unsigned char uchar;
typedef unsigned int uint;

sbit RS = P3^5;
sbit RW = P3^6;
sbit EN = P3^4;

#define LCD1602_A P0

void delay_ms(uint n) 
{ 
uint i,y; 
for(i=n;i>0;i--) 
	{
  for(y=114;y>0;y--);
	}		
}


// º¯ÊýÃû£ºÅÐ溯Êý
// º¯Êý¹¦ÄÜ£ºÅжÏÒº¾§ÊÇ·ñ·±Ã¦
void Read_busy()
{
   uchar busy;
	 LCD1602_A = 0xff;
	 RS = 0;
	 RW = 1;
	do{
	   EN = 1;
		 busy = LCD1602_A;
		 EN = 0;//À­µÍʹÄÜ¶Ë ±ãÓÚÏ´ÎʹÓÃ
	}while(busy & 0x80);//²»ÎªÁã¾ÍÒ»Ö±Ö´ÐÐ
}
//º¯ÊýÃû³Æ£ºÐ´ÃüÁî
//º¯Êý¹¦ÄÜ£ºÏòLCDÖÐдÈëÃüÁî
void Write_cmd(uchar cmd)
  {
    Read_busy();
	  RS = 0;
		RW = 0;
		LCD1602_A = cmd;
		EN = 1;
		EN = 0;
}
//º¯ÊýÃû³Æ£ºÐ´Êý¾Ý
//º¯Êý¹¦ÄÜ£ºÏòLCDÖÐдÈëÊý¾Ý
void Write_dat(uchar dat)
{
  Read_busy();
	RS = 1;
	RW = 0;
	LCD1602_A = dat;
	EN = 1;
	EN = 0;
}
//º¯ÊýÃû³Æ£ºÏÔʾһ¸ö×Ö·û
//º¯Êý¹¦ÄÜ£ºÔÚÖ¸¶¨µÄλÖÃÏÔʾһ¸ö×Ö·û
void Dis_onechar(uchar x, uchar y, uchar dat)
{
   if(y) x |= 0x40;
	   x |= 0x80;
	Write_cmd(x);
	Write_dat(dat);
}
//º¯ÊýÃû³Æ£ºÏÔʾһ¸ö×Ö·û´®
//º¯Êý¹¦ÄÜ£ºÁ¬ÐøµÄÏÔʾ×Ö·û
void Dis_str(uchar x, uchar y, uchar *str)//strÊÇÖ¸Õë±äÁ¿(µØÖ·)*strÊÇÖ¸Õë»òµØÖ·ÀïµÄÄÚÈÝ
{
   if(y) x |= 0x40;
	    x |= 0x80;
	 Write_cmd(x);
	 while(*str != '\0')
	 {
	    Write_dat(*str++);//Ö¸ÏòÏÂÒ»¸öµØÖ· µÄÄÚÈÝ
	 }
}
//º¯ÊýÃû³Æ£ºLCD³õʼ»¯
//º¯Êý¹¦ÄÜ£º³õʼ»¯LCD
void Init_LCD1602()
{
   Write_cmd(0x38);//ÉèÖÃÏÔʾģʽ
	 Write_cmd(0x0c);// ¿ªÏÔʾ ÏÔʾ¹â±ê ¹â±ê²»ÉÁ
	 Write_cmd(0x06);//µØÖ·Ö¸Õë¼ÓÒ» ¹â±ê¼ÓÒ»
	 Write_cmd(0x01);//ÇåÆÁ
}

void main()
{
	
	while(1)
	{
	uchar i = 1;
	uchar *p ;
	p = "Just do it ! ";	
	Init_LCD1602();
	
	while(*p)
	{
	  Dis_onechar(i,0,*p);
		i ++;
		p ++;
		delay_ms(250);
	}
	delay_ms(1000);
  }
}