隨著嵌入式系統(tǒng)的飛速發(fā)展，嵌入式PC 得到了廣泛應(yīng)用。標(biāo)準(zhǔn)的PC 鍵盤由于體積大，按鍵多等原因在多數(shù)情況下不能滿足要求。本文在介紹PS/2 通信協(xié)議的基礎(chǔ)上，利用AT89C52 實(shí)現(xiàn)了一種PC 非標(biāo)準(zhǔn)鍵盤的設(shè)計(jì)。給出了其完整的硬件實(shí)現(xiàn)電路圖和主要的軟件開發(fā)方法。該鍵盤具有結(jié)構(gòu)簡(jiǎn)單、工作穩(wěn)定、便于擴(kuò)展等特點(diǎn)，并已在某型航空?qǐng)D像回傳系統(tǒng)中得到具體應(yīng)用。
關(guān)鍵詞：鍵盤，PS/2 協(xié)議，單片機(jī)，嵌入式系統(tǒng)
Abstract: with the rapid development of embedded system, embedded PC has been used widely in most fields. With its large buck and excessive keys, the standard keyboard for PC doesn’t meet users’ demands. This paper firstly introduces the PS/2 communication protocol, and then uses the AT89C52 microprocessor to design a PC nonstandard keyboard successfully. The hardware circuit diagram and the main software developing method are given out with details. The designed keyboard has the advantages of simple structure,
and can work steadily, and is also easy to extend. It has been used in an aeronautic image transmission system practically.
Keywords: keyboard, PS/2 protocol, single chip microprocessor, embedded system