求51单片机超声波测距代码

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  heart3927 2011-08-21 00:00:00

  AVR的有！

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  巨色啊 2017-12-15 08:43:32

  1602液晶显示 的超声波模块程序 接口程序里边都有、、 #include<reg52.h> //#include<delay.h> #include <intrins.h> #define uchar unsigned char #define uint unsigned int sbit lcdrs=P2^3; sbit lcden=P2^2; sbit trig=P2^0; //超声波发送 //sbit echo=P3^2; //超声波接受 //P0____________DB0-DB7 uchar dis[]="Disp_HC-SR04"; uchar num[]="0123456789"; uint distance; void delay(uint z) { uint x，y; for(x=z;x>0;x--) for(y=121;y>0;y--); } void HC_init() { TMOD=0x09; TR0=1; TH0=0;TL0=0; } uint HC_jisuan() { uint dist，timer; timer=TH0; timer<<=8; timer=timer|TL0; dist=timer/53; //晶振11.0592MHz 距离cm=微秒us/58 return dist; //1个机器周期是12个时钟周期 timer*12/(58*11.0592)=timer/53 } void HC_run() { uint tempH=0x00，tempL=0x00; TH0=0;TL0=0; trig=0; trig=1; delay(1); trig=0; while((TH0-tempH!=0||TL0-tempL!=0)||(TH0==0&&TL0==0)) { tempH=TH0; tempL=TL0; } delay(1); } void lcd_write_com(uchar com) //LCD写指令 { lcdrs=0; P0=com; delay(1); lcden=1; delay(1); lcden=0; } void lcd_write_data(uchar date) //LCD写数据 { lcdrs=1; P0=date; delay(1); lcden=1; delay(1); lcden=0; } void lcd_init() //LCD初始化 { lcden=0; lcd_write_com(0x38); lcd_write_com(0x0c); lcd_write_com(0x06); lcd_write_com(0x01); } void lcd_display(uchar temp) { uint i; lcd_write_com(0x82); for(i=0;i<12;i++) { lcd_write_data(dis[i]); } lcd_write_com(0x80+0x41); lcd_write_data('D'); lcd_write_data('i'); lcd_write_data('s'); lcd_write_data('t'); lcd_write_data('a'); lcd_write_data('n'); lcd_write_data('c'); lcd_write_data('e'); lcd_write_data(':'); lcd_write_data(num[temp/100]); lcd_write_data(num[temp/10%10]); lcd_write_data(num[temp%10]); lcd_write_data('c'); lcd_write_data('m'); } void main() { lcd_init(); HC_init(); while(1) { HC_run(); distance=HC_jisuan(); lcd_display(distance); delay(200); } }

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