All the testing items are based on automatic control by single chip microcomputer to ensure the system to realize automatic printing automatic showing and keyboard input etc.
所有试验项目均以单片机自动控制为宗旨，保证系统实现自动打印、自动显示以及键盘输入等功能。
Introduced one ultrasonic distance testing system based on AT89C52 single-chip microcomputer and mainly described its hardware circuit, software design method and the operating principle.
介绍了一种基于AT 89 C 52单片机的超声波测距系统，阐述了超声测距系统的硬件电路构成、工作原理及软件设计方法。
A single chip microcomputer minimum system is used to design this instrument which include both testing and controlling functions, so that resource can be fully utilized.
该系统由于采用单片机最小系统设计，集检测与控制于一体，资源得以充分利用。
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