如何将字符串写入(广播)到PC上的所有串行端口 [英] How can I write (broadcast) a string to all serial ports on a PC

问题描述

我有一个带有四个虚拟COM端口的USB集线器.我想连接到所有四个COM端口，并同时将相同的字符串发送给所有.任何想法该怎么做?任何Visual Basic或C ++代码将不胜感激.

I have a USB hub with four virtual COM ports on it. I would like to connect to all four COM ports and send the same string to all at the same time. Any ideas how to do this? Any Visual basic or C++ code would be appreciated.

推荐答案

您可以使用以下示例获取串行端口名称列表:
http://msdn.microsoft.com/en-us/library/9wahf8t8.aspx

You can get a list of serial port names using the example here:
http://msdn.microsoft.com/en-us/library/9wahf8t8.aspx

然后，使用循环，为列表中命名的每个串行端口打开端口，发送数据，然后关闭它.
http://msdn.microsoft.com/en-au/library/system.io.ports.serialport.open.aspx
http://msdn.microsoft.com/en-au/library/y2sxhat8.aspx
http://msdn.microsoft.com/en-au/library/system.io.ports.serialport.close.aspx

Then, using a loop, for each serial port named in that list, open the port, send the data, and close it.
http://msdn.microsoft.com/en-au/library/system.io.ports.serialport.open.aspx
http://msdn.microsoft.com/en-au/library/y2sxhat8.aspx
http://msdn.microsoft.com/en-au/library/system.io.ports.serialport.close.aspx

请注意，串行端口的字符串写入默认为适用于串行端口的字符串编码，但可能不适用于您要发送的文本.

Note that serial port writing of strings defaults to a string encoding that is appropriate for a serial port but which might not be appropriate for the text you are sending.

根据您的设备和框架版本，此处报告的问题
http://stackoverflow.com/questions/2522953/从bluetoothdevice-c/2523404#2523404获取错误的串行端口名称
可能是相关的.

Depending on your device and framework version the problem reported here
http://stackoverflow.com/questions/2522953/getting-wrong-serial-port-names-from-bluetoothdevice-c/2523404#2523404
might be relevant.

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