2009-03-22 11:54 PM
Multiple Virtual COM port STM32
2011-05-17 04:06 AM
I am fairly sure that the Windows USB system doesn't allow a Virtual COM port on a composite device. This is the reason that I didn't include it on a project I did with a composite HID+MSD+Audio.
So you'd have to implement (in software) a hub with multiple attached virtual COM ports. I didn't bother as a COM was nice-to-have rather than essential. Chris.2011-05-17 04:06 AM
found something.
http://www.keil.com/forum/docs/thread14208.asp similar problem was solved, but not for me. I think descriptors are right, but something wrong in inf file.2011-05-17 04:06 AM
Chris, can you show destriptors section and .inf file from your project?
2011-05-17 04:06 AM
Friends, can we ask for ST development team to help us to fix this problem?
For team in 50-100 persons, that develop STM32 USB framework it is not difficult task, I think 🙂 Dear ST Firmware Development Team, if it possible to run twice virtual COM, can you do it in future versions of library? If not, tell us why. USB specification have poor samples, only theory of operation, so, it is very hard to understand it's many things without samples. As we speak in Russia - ''step left, step right - executing by a firing squad'' it means, that if something wrong - system crashes immediately. Very little steps forward, very long time to market. Thank you for understanding, and sorry for my English.2011-05-17 04:06 AM
2011-05-17 04:06 AM
Chris,
If possible, share your project. []´s Bruno