If you cannot complete a USB BIOS or Recovery Firmware update, it may be necessary to capture the USB boot log to verify communication and/or see where the communication is failing.
Download the SSH/Telnet client Putty at www.putty.org.
Power down the Xilica device.
Under Session Category > Connection type choose Serial.
Under Logging Category choose All session output.
Under Log file name browse to the output file location you wish to save the log file to.
Under Serial Category choose the appropriate COM port. In your Device Manager under Ports (COM & LPT) look for Silicon Labs CP210x USB to UART Bridge.
Configure the serial line as follows.
10. Click Open.
11. Power On the Xilica device. You will begin to see the boot log information being captured in real-time.
12. Once the blue Operate LED (front of QR1, rear of FR1) has turned solid for approximately 10 seconds, close the Putty window.
13. Send the putty.log file to Xilica support.