Re: [iPAQ] Networking over USB

On Mon, 2003-04-07 at 17:59, Goetz Bock wrote:
> Unlike the WinCE USB driver, the Linux one does pretend to be a network
> device. For some strange reasons (probebly related to the Intelectual
> Property laws) it does not pretend to be a generic USB network card, or
> probably it does, and the Windows host just does not recognise it.

The SA-1110 USB peripheral controller has various limitations which
prevent it from emulating most other devices. In particular, it is
unable to send a data packet containing no data, which can be a problem
for many protocols. The endpoint numbers are fixed as well.

> Emulating a USB network device is much faster (up to 64 bits might be
> send in one transaction, while with the serial device you can only
> send 8 bits at a time)

The ipaq usb-serial driver (as used with wince and the OHH bootldr)
appears to transfer up to 256 bytes at a time. This is the maximum
packet size that the SA-1110 supports.

p.
Received on Mon Apr 07 2003 - 17:07:37 EDT