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.. | ||
contrib | ||
dfu-tool.1 | ||
dfu.quirk | ||
fu-dfu-common.c | ||
fu-dfu-common.h | ||
fu-dfu-device.c | ||
fu-dfu-device.h | ||
fu-dfu-sector.c | ||
fu-dfu-sector.h | ||
fu-dfu-self-test.c | ||
fu-dfu-target-avr.c | ||
fu-dfu-target-avr.h | ||
fu-dfu-target-private.h | ||
fu-dfu-target-stm.c | ||
fu-dfu-target-stm.h | ||
fu-dfu-target.c | ||
fu-dfu-target.h | ||
fu-dfu-tool.c | ||
fu-plugin-dfu.c | ||
meson.build | ||
README.md |
DFU
Introduction
Device Firmware Update is a standard that allows USB devices to be easily and safely updated by any operating system.
Firmware Format
The daemon will decompress the cabinet archive and extract a firmware blob in DFU or DfuSe file format.
This plugin supports the following protocol IDs:
- org.usb.dfu
- com.st.dfuse
GUID Generation
These devices use the standard USB DeviceInstanceId values, e.g.
USB\VID_273F&PID_1003&REV_0001
USB\VID_273F&PID_1003
USB\VID_273F
Update Behavior
A DFU device usually presents in runtime mode (with optional DFU runtime), but on detach re-enumerates with an additional required DFU descriptor. On attach the device again re-enumerates back to the runtime mode.
For this reason the REPLUG_MATCH_GUID
internal device flag is used so that
the bootloader and runtime modes are treated as the same device.
Vendor ID Security
The vendor ID is set from the USB vendor, for example USB:0x0A12
Quirk Use
This plugin uses the following plugin-specific quirks:
DfuFlags
Optional quirks for a DFU device which doesn't follow the DFU 1.0 or 1.1 specification.
Since: 1.0.1
DfuForceVersion
Forces a specific DFU version for the hardware device. This is required if the device does not set, or sets incorrectly, items in the DFU functional descriptor.
Since: 1.0.1
DfuForceTimeout
Forces a specific device timeout, in ms.
Since: 1.4.0
DfuForceTransferSize
Forces a target transfer size, in bytes.
Since: 1.5.6
External Interface Access
This plugin requires read/write access to /dev/bus/usb
.