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fwupd/plugins/colorhug
History
Richard Hughes c4b7f42e43 Only compress one version of the builtin-quirks 
Saving the quirks in the GResource section worked well, but it made the build
system very complicated and also meant the .data section was duplicated in
both `fwupd` and `fwupdtool` -- negating a lot of the hard-fought savings.

Simplify this feature so that we just `cat` all the quirk files together, then
gzip them into a single file. This means that at startup fwupd only needs to
check the mtime of one file, and weirdly it's actually faster to load a smaller
compressed file from disk that it is to load multiple uncompressed files.
2022-09-27 12:44:04 +01:00
..
colorhug.quirk colorhug: Add the bootloader VID/PID used for the first batch of devices 2022-05-11 12:34:59 +01:00
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 Remove duplicate ->probe() calls to speed up startup by 150ms 2022-06-14 21:01:57 +01:00
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 Only compress one version of the builtin-quirks 2022-09-27 12:44:04 +01:00
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.