51单片机超声波测距程序(共9页).docx

/超声波测距，测距范围2cm-400cm;#include#include#define uint unsigned int#define uchar unsigned charsbit trig=P10;sbit echo=P32;sbit test=P11;/测试灯sbit dula=P26;sbit wela=P27;sbit BEEP=P23;uint timeh,timel,distance;uint ge,shi,bai,xiaoshu,flag,time;/*共阴极数码管不带小数点代码表*/uchar code list=0x3f , 0x06 , 0x5b , 0x4f , 0x66 , 0x6d ,0x7d , 0x07 , 0x7f , 0x6f , 0x77 , 0x7c ,0x39 , 0x5e , 0x79 , 0x71 ;/*共阴极数码管带小数点代码表*/uchar