Fast SIM cards loosing bytes

This is merely a historical archive of years 2008-2021, before the migration to mailman3.

A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/simtrace@lists.osmocom.org/.

Peter Stuge peter at stuge.se
Fri Jan 24 21:55:20 UTC 2014


Min Xu wrote:
> I would be happy to send them the USB protocol changes.  However,
> it will be INCOMPATIBLE with earlier firmware based SIMTrace boards.

There is a standardised way to deal with protocol changes in USB;
change either the bDeviceProtocol field in the device descriptor or
the bInterfaceProtocol field in the interface descriptor, and make
host software do the appropriate thing based on the descriptors of
the connected device.

Of course only new host software will work with the new protocol, but
this way new host software still continues to work with the old protocol.


//Peter




More information about the simtrace mailing list