duplex working 中文意思是什麼
duplex working
解釋
雙工工作-
The research contents of this paper includes as follows : firstly, design a new type reader based on ti s6700 reader ic and try to enhance the reading distance through adding power amplifier ; secondly, adopt the idea of gpio simulation to produce spi timings to drive s6700. secondly, overcome the shortcoming of general mcu spi port ; thirdly, design the rs232 / rs485 full duplex conversion module, mmi interface in the system ; fourthly, analyze the rfid system communication protocol iso15693 and find out the working processes and realization of the instruction ; lastly, discuss the communication safety and accidental factors including the checkout and collision design, illustrate the realization of crc and anti - collision arithmetic theory
本論文的主要研究內容包括: （一）設計基於s6700閱讀器晶元的新型閱讀器，通過使用對中高頻閱讀器外加功率放大模塊的方法，實現較遠距離通信。 （二）採用單片機通用口三線模擬的方法模擬通用spi口時序，克服其不可位操作的缺點，實現對s6700的驅動。 （三）在rfid系統中集成設計了rs232 / rs485通訊模塊、液晶顯示模塊等，著重說明了其軟硬體實現方法。
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