NAME

       fwflash - flash firmware image to a connected NXT device

SYNOPSIS

       fwflash [options]... file

       fwflash (-l|-h)

DESCRIPTION

       The  fwflash  utility  takes a firmware image file and sends it to a connected NXT device through USB. It
       takes only one parameter which is the firmware file to send. This file  usually  has  the  .bin  or  .rfw
       extension and a size of 262144 octets.

       Connect the NXT using a USB cable. Make sure it is detected by the computer when powered on.

       If  you  run  fwflash  now,  it  should report that the NXT is found, but not running in bootloader mode.
       fwflash can reset the NXT to bootloader for you.

       The next step will erase the current firmware image!

       If you answer "RESET", fwflash will erase the current firmware and will wait for the NXT to  be  detected
       in bootloader mode. The prompt can be skipped using the -y option.

       Another  option  is  to  reset the NXT manually. To do so, press and hold, for at least five seconds, the
       reset button which is hidden in the pin hole under the USB port. The brick should make a  clicking  noise
       and be detected by the computer in SAM-BA mode.

       You  can  then  use  fwflash  to  send  the  firmware. After a few seconds, it should announce successful
       flashing.

       In case of problem, check your USB cable, and your device permissions.

       The fwflash utility is part of LibNXT.

OPTIONS

       -l
           List detected devices and exit.
       -y
           Allow reset to bootloader mode without prompt (this erases the NXT memory).
       -h
           Show help message and exit.
       -b
           Select device already in bootloader mode only, ignore other NXT devices.
       -s SERIAL
           Select device with this serial (e.g. 00:16:53:01:02:03). This  does  not  work  in  bootloader  mode,
           devices in bootloader mode are always selected.
       -n NAME
           Select device with this name (e.g. NXT). This does not work in bootloader mode, devices in bootloader
           mode are always selected.

SEE ALSO

       fwexec(1)

AUTHOR

       Maintained by Nicolas Schodet <nico@ni.fr.eu.org>.

       Originally written by David Anderson <dave@natulte.net>.

                                                   2025-02-25                                         fwflash(1)