Min Xu wrote:There is a standardised way to deal with protocol changes in USB;
> I would be happy to send them the USB protocol changes. However,
> it will be INCOMPATIBLE with earlier firmware based SIMTrace boards.
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