基于52單片機的短距離超聲波測距系統(tǒng)-閱讀頁
2025-07-07 18:37本頁面
【正文】 波發(fā)送define//溫度控制通信端口definebgP3_3char//顯示標識unsignedconvert[10]={0x3F,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}。intxx,j,sj1,sj2,sj3,mqs,sx1。cl。voidvoid//延時函數(shù)void//顯示函數(shù)void//顯示轉(zhuǎn)換函數(shù)voidvoidvoidvoidvoidvoidvoidEA=1。TMOD=0x11。ET0=1。//定時器1中斷允許TH0=0x00。TL0=0x00。TH1=0x9E。TL1=0x57。csbds=0。csbint=1。csbout=1。cl=0。opto=0xff。jpjs=0。sj1=45。sj2=200。sj3=400。k4cl()。TR1=1。while(1)keyscan()。if(jpjs1)csbcj()。if(ssj3)buffer[2]=0x76。buffer[1]=0x76。buffer[0]=0x76。}if(ssj1)buffer[2]=0x40。buffer[1]=0x40。buffer[0]=0x40。}timeToBuffer()。}timeToBuffer()。offmsd()。scanLED()。if(ssj2)}Init_DS18B20(void) //初始化函數(shù){unsigned char x=0。//DQ復(fù)位delay(8)。//單片機將DQ拉低delay(80)。delay(14)。//稍作延時后 如果x=0則初始化成功 x=1則初始化失敗delay(20)。}ReadOneChar(void) //讀一個字節(jié){unsigned char k=0。for(k=8。k){DQ=0。DQ=1。delay(4)。}void//顯示功能模塊{digit=0x04。i=0。i3。i++)//3位數(shù)顯示{P3=~digitamp。//依次顯示各位數(shù)P1=~buffer。//延時處理P1=0xff。//P1口置高電平（關(guān)閉）if((P3amp。key=0。timeToBuffer()//轉(zhuǎn)換段碼功能模塊{}void}void(void)interrupt2TH1=0x9E。TL1=0x57。csbds++。if(csbds=40)csbds=0。cl=1。}}voidif(cl==1)TR1=0。TH0=0x00。TL0=0x00。i=10。while(i)csbout=!csbout。}//盲區(qū){i=0。while(csbint)i++。if(i=2450)//上限值TR0=0。TH1=0x9E。TL1=0x57。t=TH0。t=t*256+TL0。s=t*csbc/2。TR1=1。cl=0。}}voidif(sj1100)sj1=30。}voidif(sj2500)sj2=40。}voidif(sj3500)sj3=100。}voidsx1=sx1/csbc。}void(buffer[0]0x3f)buffer[0]0
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