Welcome to Reverse Engineering Subproject portion the Open Steam Controller effort.
The work in this directory is the result of trying to understand the hardware and its capabilities based on the available resources. In this case the resources available were the circuit board itself and the raw binary firmware for the controller's main processor (the LPC11U37F).
There is a lot of really neat and useful information captured here (i.e. the fact that there is a section of EEPROM where Jingle Data can be stored to change the official firmware's default behavior, how the interface to the Trackpads works) and the result of these efforts are the basis of many of the Subprojects in the Open Steam Controller effort. If anything is unclear, or you think I am not drawing proper attention to feature I have unearthed, please be sure to let me know.
See the sections below for further details on the data that has been captured in regards to the hardware and software, but please note that this is my first attempt at reverse engineering. I may have not gone about this in the most efficient or understandable manner, but I have done my best to make sure the results are captured concisely so that others may benefit from it.
This section captures details on the controller hardware (i.e. what pins are connected to what peripherals or pins on other chips). This data was sometimes obtained simply by using digital multimeter to ohm out connections. Other times reverse engineering the firmware, or running tests with custom firmware were required to fully understand how the hardware was designed.
See Luna_maiboard_V000456-00_rev3.md for information regarding the Steam Controller hardware pertaining to Luna_mainboard V000456-00 rev3.
This section captures details on the software running on the controller processors. This data was primarily obtained by using a modified version of pinkySim, which allowed for simulating the main processor (LPC11U37F) and logging relevant actions. Verification of different behaviors often required running custom firmware to ensure the proper paths were being simulated.
See LPC11U37F_Software.md for information regarding the software running on the LPC11U37 main/master processor.
See TODO for details.