超聲測距儀代碼

1、/51超聲波測距數(shù)碼管顯示/*/晶振：11。0592MzH/接線：模塊TRIG接 P0.0 ECH0 接P0.1/數(shù)碼管：共陰數(shù)碼管P1接數(shù)據(jù)口,P2.6 P2.5 P2.4接選通數(shù)碼管/*/ #include <reg52.h> /器件配置文件#include <intrins.h>sbit RX=P11;sbit TX=P10;unsigned int time=0;unsigned int timer=0;unsigned char posit=0;unsigned int j=200;unsigned long S=0;bit flag =0;unsigned

2、char const discode = 0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x40,0x00/*-*/;unsigned char const positon3= 0xef,0xdf,0xbf;unsigned char disbuff4 = 0,0,0,0,;/*/void Display(void) /掃描數(shù)碼管 If (posit=0) P0=(discodedisbuffposit)&0x7f; else P0=discodedisbuffposit; P2=positonposit; if(+posit>

3、;=3) posit=0; /*/ void Conut(void) time=TH0*256+TL0; TH0=0; TL0=0; S=(time*1.7)/100+1; /算出來是CM 根據(jù)公式 t*340*100/2 if(S>=700)|flag=1) /超出測量范圍顯示"-" flag=0; disbuff0=10; /"-" disbuff1=10; /"-" disbuff2=10; /"-" else disbuff0=S%1000/100; disbuff1=S%1000%100/10; d

4、isbuff2=S%1000%10 %10; /*/ void waizd0() interrupt 0/外部中斷0，暫停按鈕 EX0=0; IE0=0; while(1) while(j-);Display();j=200;if(IE1) /外部中斷1標(biāo)志位，恢復(fù)按鈕IE1=0;EX0=1;break; /*/ void zd0() interrupt 1 /T0中斷用來計(jì)數(shù)器溢出,超過測距范圍 flag=1; /中斷溢出標(biāo)志 /*/ void zd3() interrupt 3 /T1中斷用來掃描數(shù)碼管和計(jì)400MS啟動模塊 TH1=0xf8; TL1=0x30; Display(); t

5、imer+; if(timer>=200) timer=0; TX=1; /400MS 啟動一次模塊 _nop_(); /20us 啟動發(fā)送超聲波 _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); TX=0; /*/ void main( void ) TMOD=0x11; /設(shè)T0為方式1，GATE=0； TH0=0; TL0=0; TH1=0xf8; /2MS定時 TL1=0x30;EX0=1;EX1=1; ET0=1; /允許T0中斷 ET1=1; /允許T1中斷 TR1=1; /開啟定時器 EA=1; /開啟總中斷while(!IE1)while(1) P2=0xf0; if(IE1) break; IE1=0; while(1) wh