DFU-UTIL(1)						      General Commands Manual						       DFU-UTIL(1)

NAME

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

SYNOPSIS

       dfu-util [-ldpciatUDRhvV]

DESCRIPTION

       dfu-util is a program that implements the host (computer) 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 hexadecimal numbers (no prefix needed).	Example:

		$ dfu-util --device 1457:51ab

	      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 are finished.

       -s, --dfuse-address
	      Specify target address for raw binary download/upload on DfuSe devices.  Do not use this for downloading DfuSe files.

       -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 on the openmoko mailing list at openmoko@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).

								 February 29, 2008						       DFU-UTIL(1)