microcomputer principle and operating system
microcomputer principle and operating system
微机原理及操作系统
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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。
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