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×÷Õß: ̹¿Ë1Ì–    •rég: 2016-10-9 23:34
˜Ë(bi¨¡o)î}: ´ó¼Ò?gu¨©)ÍÎÒ¿´¿´°¡£¬Ò»‚€³¬Â•²¨œy¾àÔÙÓÔµ(sh¨´)´a¹Üï@ʾ¾àëx£¬µ«ï@ʾÓІ–î}
#include"reg52.h"  //î^Îļþ°üº¬
#include<intrins.h>
sbit LED0=P1^0;     //LEDŸô‚€Î»¶¨Áx
sbit LED1=P1^1;  //LEDŸôʮ붨Áx
sbit LED2=P1^2;  //LEDŸô°Ù붨Áx
sbit LED3=P1^3;  //LEDŸôǧ붨Áx
sbit LED4=P1^4;  //LEDŸôʹÄÜ
sbit Trig=P1^0;  //³¬Â•²¨‚÷¸ÐÆ÷ʹÄÜÒýÄ_¶¨Áx  
sbit Echo=P3^2;  //³¬Â•²¨‚÷¸ÐÆ÷»Ø²¨ÒýÄ_¶¨Áx  
float time=0;    //»Ø²¨¿‚•rég
unsigned int distance=0; //¾àëx(cm)
unsigned char timeH=0;   //¶¨•rÆ÷1¶¨•rÖµ¸ß°Ëλ
unsigned char timeL=0;   //¶¨•rÆ÷1¶¨•rÖµµÍ°Ëλ
unsigned char counter=0; //¶¨•rÆ÷0Ó‹”µ(sh¨´)Öµ
unsigned char LedBuf[6];
unsigned char code LED_num[10]={
0xC0,0xF9,0xA4,0xB0,0x99,
0x92,0x82,0xF8,0x80,0x90}; //”µ(sh¨´)´a¹ÜÕæÖµ
bit success=0;      // »Ø²¨½ÓÊճɹ¦˜Ë(bi¨¡o)Ö¾

void delay(unsigned int x)// ÑÓ•r³ÌÐò(x=1,i=10)•rÑÓ•r50us
{  
  unsigned int i,j;  
  for(j=0;j<x;j++)  
  {   
    for(i=0;i<10;i++)   
   {   
        _nop_();//¿ÕÖ¸Áî
        _nop_();   
   }  
  }
}

void display()
{
    signed char i;
    unsigned char buf[6];

    for(i=0;i<6;i++)
    {
         buf[i] = (unsigned char)(distance%10);
         distance /= 10;
    }
    for(i=5;i>=1;i--)
    {
        if(buf[i] == 0)
           LedBuf[i] = 0xFF;
        else
           break;
    }
    for(;i>=0;i--)
    {
         LedBuf[i] = LED_num[buf[i]];
    }
}

void main(void)
{
   Trig = 0;    //ʹÄܹÜÄ_³õʼÀ­µÍ
   TMOD &= 0x11;//¶¨•rÆ÷0ºÍ1ÔO(sh¨¨)¶¨žé16λ¹¤×÷ģʽ
   TH0 = 0x3C;    //-5000>>8 = 60
   TL0 = 0xB0;    //-5000%256 = 176
   TR0 = 1;    //é_¶¨•rÆ÷0
   ET0 = 1;    //¶¨•rÆ÷0ÖДàÔÊÔS
   EX0 = 1;    //ÍⲿÖДà0ÔÊÔS
   IT0 = 1;    //ÍⲿÖДà0ϽµÑØÓ|°l(f¨¡)
   EA = 1;    //é_¿‚ÖДà
   LED3 = 1;
   LED4 = 0;

   while(1)
   {
      if(success == 1)//ÅДàÊÇ·ñ½ÓÊճɹ¦
      {
         distance = (time * 0.017- 10);//¸ù“þ(j¨´)•régÇó³ö¾àëx
         success = 0;
      }
      display();
   }
}

void LedScan()
{  
   static unsigned char i=0;

   P0 = 0xFF;
   P1 = (P1 & 0xF8) | i;
   P0 = LedBuf[i];
   if(i<5)
      i++;
    else
      i = 0;
}

void Timer0int() interrupt 1 //50ms*4=0.2s,ÿ0.2ÃëœyÒ»´Î¾à
{
   EA = 0;
   TR0 = 0;
   counter++;
   if(counter==4)
   {
      Trig = 1;
      delay(1);
      Trig = 0;
      TH1 = 0;
      TL1 = 0;
      TR1 = 1;

      counter = 0;
   }
   TH0 = 0x3C;
   TL0 = 0xB0;
   TR0 = 1;
   EA = 1;
   LedScan();
}

void exint() interrupt 0 //ÍⲿÖДà0ÓÃÓÚ™zœy»Ø²¨Ï½µÑØ
{
   TR1 = 0;
   timeH = TH1;
   timeL = TL1;
   TH1 = 0;
   TL1 = 0;
   time = timeH * 256 + timeL;
   success = 1;
}


×÷Õß: “§ØˆË¯ÓXµÄô~    •rég: 2016-10-10 10:58
ÓоßówëŠÂ·Ã´£¿ï@ʾ²¿·Ö
×÷Õß: ̹¿Ë1Ì–    •rég: 2016-10-10 21:59
“§ØˆË¯ÓXµÄô~ °l(f¨¡)±íÓÚ 2016-10-10 10:58
ÓоßówëŠÂ·Ã´£¿ï@ʾ²¿·Ö

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×÷Õß: ypj666    •rég: 2017-12-20 20:12
ÄãµÄ1.0ÒýÄ_sbit TrigºÍLED0
×÷Õß: ypj666    •rég: 2017-12-20 20:13
ÄãµÄ1.0ÒýÄ_¶¨ÁxÁ˃ɴΡ£



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