Re: Fast SIM cards loosing bytes

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