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fwupd/plugins/colorhug
History
Mario Limonciello 661990ed98 Convert build system to use meson tristate features 
tristate features will automatically disable if dependencies marked
as required are missing.

Packagers can manually override using `auto_features`.

Link: https://mesonbuild.com/Build-options.html#features
2022-02-28 08:34:48 -06:00
..
colorhug.quirk Simplify the quirk file format 2021-03-03 08:30:34 +00:00
fu-colorhug-common.c trivial: reformat the whole tree to match new format 2021-08-24 11:18:40 -05:00
fu-colorhug-common.h trivial: reformat the whole tree to match new format 2021-08-24 11:18:40 -05:00
fu-colorhug-device.c Add a flag to indicate the device is signed or unsigned 2022-02-22 19:12:06 +00:00
fu-colorhug-device.h trivial: reformat the whole tree to match new format 2021-08-24 11:18:40 -05:00
fu-plugin-colorhug.c Speed up the daemon startup by ~2% by doing dlsym much less 2021-11-09 12:02:07 +00:00
meson.build Convert build system to use meson tristate features 2022-02-28 08:34:48 -06:00
README.md trivial: update markdown for pre-commit style 2021-07-18 14:42:47 -05:00

README.md

ColorHug

Introduction

The ColorHug is an affordable open source display colorimeter built by Hughski Limited. The USB device allows you to calibrate your screen for accurate color matching.

ColorHug versions 1 and 2 support a custom HID-based flashing protocol, but version 3 (ColorHug+) has now switched to DFU.

Firmware Format

The daemon will decompress the cabinet archive and extract a firmware blob in a packed binary file format.

This plugin supports the following protocol ID:

  • com.hughski.colorhug

GUID Generation

These devices use the standard USB DeviceInstanceId values, e.g.

  • USB\VID_273F&PID_1001&REV_0001
  • USB\VID_273F&PID_1001
  • USB\VID_273F

Update Behavior

The device usually presents in runtime mode, but on detach re-enumerates with a different USB PID in a bootloader mode. 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, in this instance set to USB:0x273F

External Interface Access

This plugin requires read/write access to /dev/bus/usb.