#include <reg52.h> #define uchar unsigned char#define uint unsigned intuchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};sbit wela=P2^7;sbit dula=P2^6;sbit test=P1^7;sbit Trig=P1^0;sbit Echo=P3^2;sbit succeed_flag=P1^2;uint time,timeH,timeL...