#define	uint unsigned int
#define	uchar unsigned char
#include <reg52.h>
#include <intrins.h>
#include <TEMPE.h>
#define LCD_databus P0
sbit rs=P3^0;
sbit e=P3^1;
sbit cs2=P3^2;
sbit cs1=P3^3;
sbit rw = P2^0;
sbit key1 = P3^5;

void delay(uint x)	//?¨®¨º¡À
{
	uchar i;
	while(x--)
		for(i=0;i<120;i++);
}  

void wr_busy()		//?D?|P0^7
{
	rs = 0;
	rw = 1;
	P0 = 0x00;
	e = 1;
	while(P0 & 0x80);
	e = 0;	
}

void wr_12864(uchar dat,uchar i,uchar b) //   ?¨¹¨¢?/¨ºy?Y/?¨¢D¡ä
{
	wr_busy();
	e=0;
	rs = dat;
	rw = b;
	LCD_databus = i;
	_nop_();
	e = 1;
	_nop_();
	e = 0;
}

void xuanping(uchar	ping)//???¨¢
{
	switch(ping)
	{
		case 0:cs1=0;cs2=0;break;
		case 1:cs1=1;cs2=0;break;
		case 2:cs1=0;cs2=1;break;
	}
}

void qingping(uchar	ping)//i=0¦Ì?¨º¡Ào¨°¡ê?¡ä¨®0¨°3¦Ì?0~7DD¦Ì?¦Ì¨²0¨¢D?a¨º?¨¦¡§?¨¨???¨¢			
{
	uchar i,j;
	xuanping(ping);
	for(i=0;i<8;i++)
	{
		wr_12864(0,0xb8|i,0);		
		wr_12864(0,0x40,0);
		for(j=0;j<64;j++)
			wr_12864(1,0x00,0);
	}
}

void init_12864()//3?¨º??¡¥
{
	wr_12864(0,0x3e,0);
	wr_12864(0,0x3f,0);
	qingping(0);
}

void lcd_12864(char ping,char ye,lie,char *p)  //¨¦¡§?¨¨??¨º?
{
	char i;
	xuanping(ping);
	wr_12864(0,0xb8|ye,0);	//0xb8¨°3¨º¡Á?¡¤
	wr_12864(0,0x40|lie,0);    //0x40¨¢D¦Ì??¡¤
	for(i=0;i<16;i++)
	wr_12864(1,p[i],0);
		
	wr_12864(0,0xb8|ye+1,0);
	wr_12864(0,0x40|lie,0);
	for(i=16;i<31;i++)
	wr_12864(1,p[i],0);
		  	
}
void disp()
{
	init_12864();
	lcd_12864(2,0,3*16,yi);
}
void disp_1()  //2?¦Ì£¤1¡êo???|
{
	init_12864();
	lcd_12864(2,0,3*16,ge);//2=¡Á¨®¡ã??¨¢¨®DD¡ì¡ê?0=¦Ì¨²0¨°3¡ê?2=¦Ì¨²1¨¢D¡ê?ge¨¦¡§?¨¨
	lcd_12864(1,0,0*16,ji);
}

void disp_2() //2?¦Ì£¤2:??¨°3
{
	init_12864();
	lcd_12864(2,0,3*16,xia);
	lcd_12864(1,0,0*16,ye);
}

void disp_3()
{
	init_12864();
	lcd_12864(2,0,3*16,chui);
	lcd_12864(1,0,0*16,ji);	
}

void main()
{
	char one=0;
	while(1)
	{
		if(key1 == 0)
		{
			while(key1 == 0);
			one++;
		}
		switch(one)//key1¡ã¡ä?£¤
		{
			case 0: disp();delay(100);  break;
			case 1: disp_1();delay(100);break;
			case 2: disp_2();delay(100);break;
			case 3: disp_3();delay(100);break;
			case 4: one = 0; break;
		}
	}	
}