P0924JH
P0924JH
P0924JH
USB串口转换器是实现USB与RS-232/RS-485/RS-422串口设备相互通讯的一种协议转换装置(USB协议-串行通信协议)。一般的USB串口转换器支持的波特率高达到115.2Kbps(115200bps).USB串口的高速通信是指高波特率过115200bps的串口通信,比如921600、460800、230400bps.由于这几种波特率是非标的,所以从硬件到软件都有特殊要求和方法才可以实现。本文以波仕USB232GH2转换器和波特率921.6Kbps(921600bps)为例来进行介绍。
要实现USB串口的921.6Kbps的高速通信,必须满足2个条件:1、USB-串口转换器本身支持921.6Kbps波特率;2、必须有支持921.6Kbps波特率的通信软件。如果软件只有应用程序(EXE可执行文件),那也就只能够进行通信的演示,因为所有的接收与发送数据都必须位于应用程序的界面内,无法提供给用户。如果用户要将这些接收或者发送的数据嵌入到用户自己的程序中,那么就必须有支持921.6Kbps波特率的通信软件的源代码。
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