3.7 Factory Reset
Factory reset is a get-out-of-trouble facility which resets your U4B completely to the default factory
configuration. All entries of the Configuration screen are returned to their factory default settings.
The disk is formatted, deleting all files.
Before doing a factory reset, you are asked if you are sure; press Y to continue, or any other key
to quit.
3.8 Update F/W (Firmware)
On occasion QRP Labs may make available updated firmware for QDX, in order to deliver bug
fixes or functionality enhancements.
QDX contains a new firmware update procedure for STM32-series microcontrollers, called QFU
(
Q
RP Labs
F
irmware
U
pdate) which provides the following features:
•
Easy
– anyone can do the firmware update
•
No additional hardware required:
only a standard USB A-B cable (or micro-USB cable if
you have installed a micro-USB connector)
•
No additional software required:
just the standard file manager application that is already
available on any PC
•
No drivers:
no special drivers need to be installed, the existing drivers on any modern PC
operating system are used
•
Works on any PC Operating System:
and in the same way: Windows, Linux, Mac
U4B operating manual Rev 1.00
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