Someone mentioned to me in a Chinese forum that the Microchip
implementation is really not optimal and the PIC18FUSB MCUs
can be much faster using customized firmware and PC host software.

I know little about USB and PC host programming so I am not
so sure whether this is true or not. But I always have the
idea of replacing the PicKit 1 16C745 with the new 18F2550
and extend its functionality. It is possible to use CDC
and even use olin's protocol and host software. :)

Xiaofan

> -----Original Message-----
> From: Jan-Erik Soderholm [mailto:jan-erik.soderholm@telia.com]
> Sent: Monday, February 28, 2005 4:30 PM
> To: piclist@mit.edu
> Subject: RE: [PIC:] USB VID/PID thoughts
> Hi.
> Found AN956 at Microchip. That app note describes the use of
> the CDC class ("Communication Device Class") that is used to
> run emulated COM ports. An easy way to move an COM/USART
> based application to USB. No (or minor) changes to the PC
> app (still uses the COM port API's in Windows) and Microchip
> provides "CDC firmware" that hides the USB details from the
> PIC application.
> 
> Maybe worth a look... :-)
> 
> There is a link to the app note from the device page for any
> of the new 18F USB PIC's.
> 
> Regards,
> Jan-Erik.
> 
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