//#pragma src
#include<reg52.h>
#include<absacc.h>
//#include <asm.h>

//#pragma OT(4,speed)
//#include<float.h>

#define uint unsigned int
#define uchar unsigned char
#define usv=0.34 //um/us

sbit USOut=P1^0;//us=ultrasonic
sbit USIn=P3^3;
sbit dula=P2^6;
sbit wela=P2^7;

int a;

uchar USBuffer=0,Byturns=1,T1times=0,T0times=0,th,tl,tt=0;
uchar i,j,k,qian_c,bai_c,shi_c,ge_c;
uint s=0,ss;

uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,    //數碼管編碼
                        0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
extern void send(void);


void delay(uchar i)
{
  for(j=i;j>0;j--)
    for(k=125;k>0;k--);
}

void display(uchar qian_c,uchar bai_c,uchar shi_c,uchar ge_c)
{
	//P0=0xff;
	
	dula=0;
	P0=table[qian_c];
	dula=1;
	dula=0;
	//P0=0xff;  
	wela=0;
	P0=0xfe;
	wela=1;
	wela=0;
	delay(3);
	 
	dula=0;
	P0=table[bai_c];
	dula=1;
	dula=0;
	 //P0=0xff; 
	wela=0;
	P0=0xfd;
	wela=1;
	wela=0;
	delay(3);


  
	dula=0;
	P0=table[shi_c];
	dula=1;
	dula=0;  
//P0=0xff; 
	wela=0;
	P0=0xfb;
	wela=1;
	wela=0;
	delay(3);	

	dula=0;
	P0=table[ge_c];
	dula=1;
	dula=0; 
//P0=0xff; 
	wela=0;
	P0=0xf7;
	wela=1;
	wela=0;

	  
	delay(3);	

}

void send(void);

void main(void)//主函數
{
	dula=0;	
	delayus();
	wela=0;
	EA=1;
	IT0=1;
	//ET0=1;
	ET1=1;
	EX1=1;
	TMOD=0x10;
	TH1=0x3C;
	TL1=0xB0;
	//TH0=0xFF;//13us
	//TL0=0xF3;
	USOut=1;
	USIn=1;
	TR1=1;
	TR0=1;
	for(;;)
	{
		//SOut=1;
	//USIn=1;
			display(qian_c,bai_c,shi_c,ge_c);
	if(tt)
		{	

			send: 
          nop
			tt=0;

		}
		


	}
}


/*void timer0(void) interrupt 1 using 1
{
	TH0=0xFF;
	TL0=0xF3;
	USOut=!USOut;
	Byturns=!Byturns;
	T0times++;
	if(T0times>=10)
		{
			//T0times=0;
			TR0=0;//關閉定時器0	
			ET0=0;
			//USOut=!USOut;
		}
}
*/
void timer1(void) interrupt 3 //using 2
{
	TH1=0x3C;
	TL1=0xB0;
	T1times++;
	if(T1times>=20)
	{
		T1times=0;
	// T0times=0;
		TR0=1;
		ET0=1;
		tt=1;
	}
	//display(15,15,15,15);
}

void intsvr1(void) interrupt 2 //using 3
{	
	th=TH1-0x3C;
	tl=TL1-0xB0;
	//a=1;
	tt=1; 
	s=(th*256+tl);//mm
	s=s*usv/2;
//	s=8694;
	qian_c=s/1000;
	bai_c=s%1000/100;
	shi_c=s%100/10;
	ge_c=s%10;
	EX1=0;
}