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Author Topic:   CDC 2 Virtual COM Port
mathivanan
New Member 		posted September 02, 2010 09:13 AM     Click Here to See the Profile for mathivanan   Click Here to Email mathivanan     Edit/Delete Message
We have made CDC USB VCOM Driver in ARM7(Successfully running). we need to know that CDC HOST side driver will supports 2 serial port or not? If it supports how to implement two 2 Serial Ports in ARM7(USB Device)

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Scotty
Member 		posted September 02, 2010 09:28 AM     Click Here to See the Profile for Scotty     Edit/Delete Message
Hi mathivanan,

We have made CDC USB VCOM Driver in ARM7(Successfully running).
This is a forum related to SiLabs MCUs. Maybe you should try USB.org forums.

we need to know that CDC HOST side driver will supports 2 serial port or not?
I don't see why it should not support two or more ports. If I'm correct, the host will see each port stand-alone, independent from each other. However, I think the implementation is done via USB composite(?) device. Read this post: http://www.cygnal.org/ubb/Forum9/HTML/000988.html

I think Tsuneo can clarify the details for you.

If it supports how to implement two 2 Serial Ports in ARM7(USB Device)
You still mean the USB part? I think it's "simply" duplicating the descriptors etc. and show up a composite device to the host. Again, Tsuneo can clarify, I'm sure he will answer.

Regards,

Scotty

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