---
name: "fwexec"
section: "1"
platform: "linux"
package: "libnxt"
version: "0.5.2-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/fwexec"
---

# fwexec(1)

upload firmware image to a connected NXT device and run it from RAM

## NAME

fwexec - upload firmware image to a connected NXT device and run it from RAM

## SYNOPSIS

**fwexec** \[*options*\]... *file* \[*load\_address* \[*jump\_address*\]\]

**fwexec** (**-l**\|**-h**)

## DESCRIPTION

The **fwexec** utility is similar to [**fwflash**(1)](/fwflash/1.md), but the firmware image is uploaded to NXT RAM and executed from there. The image must have been compiled specially to handle this.

The NXT must be in bootloader mode, see [**fwflash**(1)](/fwflash/1.md) for more details.

The **fwexec** 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

[**fwflash**(1)](/fwflash/1.md)

## AUTHOR

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

Originally written by David Anderson \<dave@natulte.net\> based on first initial version by Lawrie Griffiths.