For Developers
From CHDK Wiki
The table below is color coded to show the status of development work on porting CHDK to different cameras. If there is some work being done to port to a particular camera, there should also be a link to a camera-specific development page.
The page also has links to articles which could be useful if you want to participate in the development process.
[edit] Cameras overview
- Legend
-
- Black - neither original firmware nor firmware dump is available
- Red - Camera has responded to something on the card, but a firmware dump has not succeeded, current udumper code does not work on these cameras.
- Blue - either original firmware or firmware dump is available; porting is needed
- Magenta - A developer has started the porting process for this camera AND an alpha or beta build with a limited feature set is available for testing
- Green - A port has been completed on one or more firmware versions for this camera
Note: the porting process entails:
- get the camera to somehow respond to something on the card. (cameras in Red)
- using the process that got you step 1, and some electronics, read out a copy of the existing firmware (e.g., dump the firmware). (cameras in Blue)
- analyze the firmware, find out where key routines are.
- modify the source code to add the locations of these key routines
- compile the software and CHDK runs on the camera in some limited state (cameras in Magenta)
- After all bugs are fixed (cameras in Green)
[edit] Common articles
- Modifying the Source Code
- Basic information about project structure.
- Documentation of the Sourcecode
- Yes, some documentation is also required.
- Bug tracking and feature requests with Mantis New !
- How to use Mantis to report bugs/issues found in CHDK, request features, submit contributions.
- Compiling the CHDK under GNU/Linux
- Compiling the CHDK under Mac OS X
- Compiling the CHDK under Windows
- How to tune build environment and compile CHDK.
- Signature finder
- Finding signatures automatically with the "Signature finder" (finsig/gensig) tool
- Porting the CHDK
- Various methods of getting of firmware dump.
- CHDK Coding Guidelines New !
- Cautions and best practices for CHDK code.
- Optimizing ARM sourcecode
- How to make your CHDK code run more efficiently.
- Camera RAM memory usage
- How to optimize RAM usage, also some statistics...
- Loading dump to IDA
- Using IDA for a dump analysis.
- IDA Visual Analysis
- Visual graph analysis tools.
- Adding support of a new camera
- The instruction for adapt sources to a new camera.
- DryOS Porting
- Information about the new OS.
- GPL Tools
- Documentation for using GNU/GPL tools for binary blobs analysis
- Adding Firmware Features
- A guide for finding and adding stuff from the firmware to CHDK and uBASIC.
- Developer Technical Documents
- Useful external documents relating to processor, OS and relevant standards.
[edit] Some technical info
- List of PropertyCases
- List with description of special registers which indicate and control DIGIC processor.
- List of Params
- List with description of special registers which indicate and control DIGIC processor.
- Camera IDs
- List of camera product IDs
