#include <STC12C5A60S2.h>
#include <math.h>
#define lcd P0

sbit sl=P1^0;
sbit og=P1^1;
sbit st=P1^2;
sbit gs=P1^3;

sbit adcs=P2^0;
sbit adclk=P2^1;
sbit addo=P2^2;
sbit addi=P2^2;

sbit lcdrs=P1^5;
sbit lcdrw=P1^6;
sbit lcden=P1^7;


void delay(int n)
{
	int i,j;
	for(i=0;i<n;i++)
		for(j=0;j<1000;j++);
}

void lcdwr_com(unsigned char com) 
//дָÁÊý 
{
	lcdrs=0;
	delay(1);
	lcd=com;
	lcden=1;
	lcden=0;
}

void lcdwr_data(unsigned char date)
//дÊý¾Ý 
{
	lcdrs=1;
	delay(1);
	lcd=date;
	lcden=1;
	lcden=0;
}

void lcdinit()
//³õʼ»¯º¯Êý 
{
	lcdrw=0;
	lcden=0;
	lcdwr_com(0x38);
	lcdwr_com(0x0c);
	lcdwr_com(0x06);
	lcdwr_com(0x01);
	lcdwr_com(0x80);
}


int rd_ad(unsigned char *date,int SGL,int ODD) //¶ÁÈ¡adÊý¾Ý 
{
	unsigned char data0=0,data1=0;
	int i,j;
	adcs=1;
	adcs=0;
	addi=1;
	adclk=0;
	adclk=1;
	adclk=0;  //µÚÒ»¸öÂö³å 

	addi=SGL;  //ģʽѡÔñ 
	adclk=1;
	adclk=0;  //µÚ¶þ¸öÂö³å 

	addi=ODD;
	adclk=1;
	adclk=0; //µÚÈý¸öÂö³å 

	addo=1;  //ÊÍ•ÅÊý¾Ý¶Ë¿Ú 

	for(i=0;i<8;i++){
		data0<<=1;
		adclk=1;
		adclk=0;
		j++;j++;j++;j++;j++;
		j++;j++;j++;j++;j++;	//ÑÓʱ5us 
		if(addo) data0|=0x01;
	}
	if(addo==1)  data1|=0x80;
	for(i=0;i<7;i++){
		data1>>=1;
		adclk=1;
		adclk=0;
		j++;j++;j++;j++;j++;
		j++;j++;j++;j++;j++;
		if(addo==1)data1|=0x80; 
	}
	adcs=1;
	addo=1;
	adclk=1;  //ÊÍ•Å×ÜÏß 
	if(data0==data1){
		*date=data1;   //ת»»³É¹¦±£´æÊý¾Ý 
		return 1;
	}
	else return 0;
}

void main()
{
	unsigned char date;	
	double disp;
	unsigned char BUF[6];
	int pm;  //•ûºÅλ 
	int i;
	unsigned int angle; //½Ç¶È 
	sl=1;
	og=1;
	gs=1;
	st=1;
	lcdinit();
	while(1){
		if(rd_ad(&date,1,0)){
			disp=date;
			disp*=195;
			if(disp>=16500){
				pm=1;   //Ϊ¸º 
				angle=5730*asin((disp-16500)/8000);//»¡¶Èת»»Îª½Ç¶È 
				if(angle%10>=5)  angle=angle/10+1;
				else angle/=10;	  //ËÄÉáÎåÈëËãһλСÊý 
			}
			else {
				pm=0;   //ΪÕý 
				angle=5730*asin((16500-disp)/8000);//»¡¶Èת»»Îª½Ç¶È 
				if(angle%10>=5)  angle=angle/10+1;
				else angle/=10;	  //ËÄÉáÎåÈëËãһλСÊý 
			}
			BUF[0]=angle/100%10+'0';
			BUF[1]=angle/10%10+'0';
			BUF[2]='.';
			BUF[3]=angle%10+'0';
			i=0;
			while(BUF[i]=='0'&&BUF[i+1]!='.'){
				BUF[i]='#';
				i++;
			}
			lcdwr_com(0x80);
			if(pm==1){
				lcdwr_data('-');
				delay(1);
			}
			for(i=0;i<4;i++)
			    if(BUF[i]!='#'){
					lcdwr_data(BUF[i]);
					delay(1);
				}
			lcdwr_data(0xdf);//ÏÔʾ¶È•ûºÅ 
			delay(1);
			lcdwr_data(' ');//²¹Æ볤¶È²î 
			delay(1);
			lcdwr_data(' ');
		}
		delay(300);
	}		  
}