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dfu-util

NAME

dfu-util - Device firmware update (DFU) USB programmer

SYNOPSIS

dfu-util [-ldpciatUDRhvV]

DESCRIPTION

dfu-util is a program that implements the host (PC) side of the USB DFU (Universal Serial Bus Device Firmware Upgrade) protocol.

In the OpenMoko project (for example), this program is used to communicate with the specially enhanced u-boot boot loader, which implements the DFU device side.

OPTIONS

-l, --list

List the currently attached DFU capable USB devices.

-d, --device VENDOR:PRODUCT

Specify vendor/product ID of the DFU device. Both VENDOR and PRODUCT are hex-numbers which must start with 0x. Example:

$ dfu-util --device 0x1457:0x5119

If you only have one standards-compliant DFU device attached to your PC, this is optional. However, as soon as you have multiple DFU devices, dfu-util will detect this and abort, asking you to specify which device it shall use.

-p, --path BUS-PORT. ... .PORT

Specify the path to the DFU device.

-c, --cfg CONFIG-NR

Specify the configuration of the DFU device.

-i, --intf INTF-NR

Specify the DFU interface number.

-a, --alt ALT

Specify the altsetting of the DFU interface by name or by number.

-t, --transfer-size

Specify the number of bytes per USB transfer. If you don't supply this option, the maximum possible size for your combination of host OS and USB device is chosen (for optimal performance).

-U, --upload FILE

Read firmware from device into FILE.

Note: Upload support is currently broken.

-D, --download FILE

Write firmware from FILE into device.

-R, --reset

Issue USB reset signalling once we're finished.

-h, --help

Show a help text and exit.

-v, --verbose

Print more information about dfu-util's operation. A second -v will turn on verbose logging of USB requests.

-V, --version

Show version information and exit.

EXAMPLES

Here are some examples for the usage of dfu-util in the OpenMoko project (working with the Neo1973 hardware):

Flashing the rootfs:
$ dfu-util -a rootfs -R -D /path/to/openmoko-devel-image.jffs2

Flashing the kernel:
$ dfu-util -a kernel -R -D /path/to/uImage

Flashing the bootloader:
$ dfu-util -a u-boot -R -D /path/to/u-boot.bin

Copying a kernel into RAM:
$ dfu-util -a 0 -R -D /path/to/uImage

Once this has finished, the kernel will be available at the default load address of 0x32000000 in Neo1973 RAM.

Note: You cannot transfer more than 2MB of data into RAM using this method.

BUGS

Please see http://wiki.openmoko.org/wiki/Dfu-util for some limitations and bugs in the current dfu-util code.

Please report any further bugs at http://bugzilla.openmoko.org or on the openmoko-kernel mailing list at openmoko-kernel@lists.openmoko.org.

LICENCE

dfu-util is covered by the GNU General Public License (GPL), version 2 or later.

AUTHORS

Weston Schmidt <weston_schmidt@yahoo.com>
Harald Welte <hwelte@hmw-consulting.de>

This manual page was written by Uwe Hermann <uwe@hermann-uwe.de>. It is licensed under the terms of the GNU GPL (version 2 or later).