超声波测距C语言源程序代码.docx

1、超声波测距C语言源程序代码超声波测距C语言源程序代码/*HZ即单位s的倒数本晶振为12MHZ,因此外部的时钟频率为12MHZ,所以内部的时钟频率为(12MHZ)/12=1MH即1000000HZ,而机械频率为1/(1MHZ),即每完成一次计算(即定时器的值加一)用时0.000001s,即1us(微秒).*/*/具有模式选择.#include#define UC unsigned char#define UI unsigned intvoid delay(UI); /延时9.56us程序sbit beep = P13; /用于声音报警sbit Lv = P17; /用于光报警sbit Hong

2、= P16; sbit QD = P37;/K8 /P37口(K8)为确定键,sbit GX = P31;/K7 /P33口(K2)为修改键,sbit SX = P36;/K6 /P32(K3)为测量键.sbit BX = P30;/K5 /个(K7),十(K6),百(K5),三位修改键sbit a = P12;/百位 /数码管位选sbit b = P11;/十位sbit c = P10;/个位sbit trig = P14; /方波发射端sbit echo = P15; /超声波接收端void IntConfiguration(); /用来设置中断的函数,P33口(K2)为修改键,P32(K

3、3)为测量键.void TimeConfiguration(); /用来设置定时器的函数sbit K1 = P34;/动态sbit K4 = P35;/静态 /用于进行模式切换(K1、K4键)void xiaxian(); /修改函数,用来修改下限void shangxian(); /修改函数,用来修改上限UI min3=0,5,0; /报警极限,拆分为百十个三位UI max3=3,0,0; /MIN,MAX 用来存储最大和最小值void MINxianshi(UI); /最小范围和最大范围的显示void MAXxianshi(UI);UC code CharacterCode10 = 0x3

4、f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f;/数码管数字字符(P2口)/*主函数*/void main() TimeConfiguration(); /设置定时器0 IntConfiguration(); /设置中断允许,K4键为修改键,K8键为确定键 while(1) MINxianshi(40); /1.50169000s MAXxianshi(40); /1.50098300s /*超声波测距函数*/void zhongduan_0() interrupt 0 /测量中断函数(外部中断0) UI moshi = 0; UI juli =

5、0; UI time = 0; UI MAX, MIN; UI TT = 0;/用于第一次测量时给P15口置一,以便正确读取数值 UI t1, t2, t3; UI GE = 0, SHI = 0, BAI = 0; /先定义三个变量,用来显示测量的距离. a = 0; b = 0; c = 0; P2 = 0x00; /防止最后显示的那个数码管一直亮 MAX = max0*100 + max1*10 + max2; /计算最大与最小值 MIN = min0*100 + min1*10 + min2; while(1)/下面进行测量 while(1) /*先进行模式判断*/ if(0 = K1

6、) moshi = 1; break; /模式1为动态测量 if(0 = K4) moshi = 2; break; /模式2为静态测量 if(0 = QD) return; /结束测量函数 /*计算距离*/ loop: beep = 1;/关掉定时器 Lv = 1; Hong = 1;/关掉灯 a = 0; b = 0; c = 0; P2 = 0x00;/防止最后显示的那个数码管一直亮 if( (0 = QD)&(1 = moshi) ) break; if( (0 = QD)&(2 = moshi) ) delay(55500); if(0 = QD) delay(55500); if(

7、0 = QD) break; t1 = 35, t2 = 35; t3 = 35; trig = 0; echo = 0; delay(2); /初始化拉低两个端口 trig = 1; delay(2); trig = 0; /输出端输出27us的高电压,并将输出端口拉低 while(echo = 0); /判断是否有回波返回,有则开启定时器 TR0 = 1; /当有高电平输出时,开启定时器 while(echo = 1); TR0 = 0; /当高电平变成低电平时,关闭定时器 +TT; /测量值加一,记录测量次数 if(1 = TT) delay(55500); TH0 = 0x00;TL0

8、 = 0x00; /定时器的初值,定时器的定时为65536us. goto loop; time = TL0 + TH0*256; /接下来显示测量的距离 TH0 = 0x00;TL0 = 0x00; /定时器的初值,定时器的定时为65536us. juli = ( int )( (time*0.034)/2 ); BAI = ( (juli%1000)/100 ); SHI = ( (juli%100)/10 ); GE = ( juli%10 );/*两种模式的距离显示*/ if(juli MAX) Hong = 0; Lv = 1; while( t1- ) a = 0; b = 1;

9、c = 1; P2 = CharacterCodeBAI; delay(400); a = 1; b = 0; c = 1; P2 = CharacterCodeSHI; delay(400); a = 1; b = 1; c = 0; P2 = CharacterCodeGE; delay(390); beep = 0; if( (1 = moshi)&(0 = t1) ) goto loop; if(moshi = 2) t1 = 2; if(0 = QD) goto loop; else if(juli MIN) Lv = 0; Hong = 1; while( t2- ) a = 0;

10、 b = 1; c = 1; P2 = CharacterCodeBAI; delay(500); a = 1; b = 0; c = 1; P2 = CharacterCodeSHI; delay(500); a = 1; b = 1; c = 0; P2 = CharacterCodeGE; delay(400); beep = 0; delay(100); beep = 1; if( (1 = moshi)&(0 = t2) ) goto loop; if(2 = moshi) t2 = 2; if(0 = QD) goto loop; else beep = 1; Lv = 1; Ho

11、ng = 1; while( t3- ) a = 0; b = 1; c = 1; P2 = CharacterCodeBAI; delay(600); a = 1; b = 0; c = 1; P2 = CharacterCodeSHI; delay(600); a = 1; b = 1; c = 0; P2 = CharacterCodeGE; delay(600); if( (1 = moshi)&(0 = t3) ) goto loop; if(2 = moshi) t3 = 2; if(0 = QD) goto loop; /显示结束 /*/void zhongduan_1() in

12、terrupt 1 /定时器溢出时的中断,显示测得的距离(定时器中断0) TH0 = 0x00;/定时器的初值,定时器的定时为65536us, TL0 = 0x00;/*/void zhongduan_2() interrupt 2 /修改键(K4)的中断函数(外部中断1) xiaxian(); while(QD=0); shangxian();/*/void MINxianshi(UI TT) /显示最小距离 while(TT-) a = 0; b = 1; c = 1; P2 = CharacterCodemin0; delay(500); a = 1; b = 0; c = 1; P2

13、= CharacterCodemin1; delay(500); a = 1; b = 1; c = 0; P2 = CharacterCodemin2; delay(500); P2 = 0x00; delay(55500);void MAXxianshi(UI TT) /显示最大距离 while(TT-) a = 0; b = 1; c = 1; P2 = CharacterCodemax0; delay(500); a = 1; b = 0; c = 1; P2 = CharacterCodemax1; delay(500); a = 1; b = 1; c = 0; P2 = Char

14、acterCodemax2; delay(500); P2 = 0x00; delay(55500);/*/void delay(UI T) /延时程序 while(T-);/*/void IntConfiguration() /设置中断函数 /优先级设置 PT2 = 0; PS = 0; PT1 = 0; PX1 = 0; PT0 = 1; PX0 = 0; IT1 = 1; /外部中断0为跳变沿触发 EX1 = 1; /P33口(K4键)修改键,中断允许开启 IT0 = 1; /外部中断1为跳变沿触发 EX0 = 1; /P32口(K1键)测量键,中断允许开启 ET0 = 1; /定时器0

15、的中断允许开启 EA = 1;void TimeConfiguration() /设置定时器,以及定时器的初值 TMOD = 0x01;/设定只使用0号定时器; 模式:定时器; 工作方式:1号工作方式. /下面是定时器的初始值, TR0,TR1是用来开启定时器的 TH0 = 0x00;/定时器的初值,定时器的定时为50us. TL0 = 0x00; /*1号定时器不用,所以没有TH1,TL1*/*/void xiaxian() /修改下限 while(1) if(BX=0)/百位 P2=0x00; min0+; if(min0=10) min0=0; delay(60000); a = 0;

16、b = 1; c = 1; P2 = CharacterCodemin0; delay(100); if(SX=0)/十位 P2=0x00; min1+; if(min1=10) min1=0; delay(60000); a = 1; b = 0; c = 1; P2 = CharacterCodemin1; delay(100); if(GX=0)/个位 P2=0x00; min2+; if(min2=10) min2=0; delay(60000); a = 1; b = 1; c = 0; P2 = CharacterCodemin2; delay(100); if(QD=0) a =

17、 0; b = 0; c = 0; P2 = 0xff; break; void shangxian() /修改上限 while(1) if(BX=0)/百位 P2=0x00; max0+; if(max0=10) max0=0; delay(60000); a = 0; b = 1; c = 1; P2 = CharacterCodemax0; delay(100); if(SX=0)/十位 P2=0x00; max1+; if(max1=10) max1=0; delay(60000); a = 1; b = 0; c = 1; P2 = CharacterCodemax1; delay(100); if(GX=0)/个位 P2=0x00; max2+; if(max2=10) max2=0; delay(60000); a = 1; b = 1; c = 0; P2 = CharacterCodemax2; delay(100); if(QD = 0) a = 0; b = 0; c = 0; P2 = 0xff; while(QD = 0); break; /*/