本文介紹了RS-232 串行總線及USB 通用串行總線技術，討論了其抗干擾性，分析了串口出現誤碼及USB 接口出現死鎖現象的原因，提出了一種強干擾下數據采集系統穩定通訊的解決方案。使用RS-232 傳送指令，USB 傳送采集數據，當監測到通訊死鎖時，通過指令控制USB 接口重新初始化，保證了強干擾下通訊的穩定可靠性。
關鍵字：通訊；RS-232；USB；穩定性
Abstract: This paper introduces the technology of RS-232 serial bus and the universal serial bus, discusses its anti-jamming, analyzes the reason of serial port producing error code and the USB deadlock phenomenon, proposes a solution of stable communication in data acquisition system under strong interference. Uses the RS-232 sending instruction, the USB sending acquisition data, when the communication deadlocks, initializes USB interface by the instruction, ensures the stability of communication under strong interference.
Key Words: communication; RS-232; USB; stability