说明：   项目名称:超声波测距接收部分程序 功 能: 晶振采用12M，引脚定义：P0.1(SDA),P0.2(SCL),P3.2(即INT0,红外输入),P3.3(即INT1,超声波输入) 硬件环境: 自制单片机实验板， 软件环境: Windows操作系统 使用软件：伟福 V3.20, Easy 51Pro v2.0
(Project Name: Ultrasonic Distance Measurement receive some program features: crystal using 12M, pin definition: P0.1 (SDA), P0.2 (SCL), P3.2 (that is, INT0, infrared input), P3.3 ( that is, INT1, ultrasonic input) Hardware Environment: self-made single-chip board, software environment: Windows operating system using the software: Wei Fu-V3.20, Easy 51Pro v2.0)