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USB Port unable to open in Tera terminal or real term

MD18

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CDC devices are not automatically detected by a Windows driver if no specific .inf file with fitting VID/PID is provided for them.
--- Updated ---

Apparently your board uses ST link VID/PID and is respectively recognized. The virtual COM ports should be useable by your terminal app. What happens if you enter COM4 or COM6?
 
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MD18

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CDC devices are not automatically detected by a Windows driver if no specific .inf file with fitting VID/PID is provided for them.
--- Updated ---

Apparently your board uses ST link VID/PID and is respectively recognized. The virtual COM ports should be useable by


At first time the port is detected in the tera terminal but it goes in not responding mode , so I change its baudarte for that I goes into device manger and over there I change the baudrate after that setting tit doesnot shown in terminal , I reset the setting , shut down the Pc all things i did it but it doesnot shown why these happen what I have to done to reslove that?
 

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