Visual-speaking system based on AT89S51 is introduced in this paper. The structure and function of entrance machine, resident machine and supervisor are analysed.
In the article, it gives the software design of each hardware module in the system, and narrates the software flow plan of supervisor, entrance machine and resident machine in detail.
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不是，是个大超市。超市门口有几个自动取款机。
No, a big market. There are some ATMs next to the gate.
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