Cortex M3 USB bulk & double buffer

stefanobettega · ‎2008-01-22

Posted on January 23, 2008 at 07:00

stefanobettega · ‎2011-05-17

Posted on May 17, 2011 at 12:22

I'm modifying the VirtualCOM demo to support BULK transfer with double buffer feature.

Actually I'm working on the transmission side, from Cortex to PC.

I'm wondering how to copy character into the transmission buffer. I think I cannot use the UserToPMABufferCopy, as I could have to modify buffer contents in some cases.

Is there any application note with a sample transmission from Cortex to PC in bulk double buffer mode? The only one I found is the Audio Speaker demo, but works in PC->Cortex direction and also in isochronous mode.

Many thanks