Arcade Board ADC

This project is hardware and firmare designed to convert 0-3.3V analog input signals to digital output signals for gamepad controller boards.

It is built with the intention of using Hall Effect keyboard switches with controller boards that typically only accept digital signals for gamepad inputs through 20 pin connectors. Such as

• RP2040 Advanced Breakout Board (GP2040-CE)
• Brook Universal Fighting Board
• Brook UFB-Fusion
• Brook P5 PLUS Fighting Board

To-Do

• User Configurable GPIO Input
• Custom Actuation Distance
• Advanced Trigger Behavior
  • Static Trigger
  • Rapid Trigger
  • Continuous Rapid Trigger
• Per Button Settings
• Analog output for Left/Right Analog stick axes
• Analog output for L2/R2 Analog Triggers
• Analog output for all gamepad inputs
• Board Hardware - Production Files
  • Primary Board
  • MUX Auxilary Board
• Web GUI Configurator
• Github Workflow .uf2 Build (CI/CD)

Project Setup

Debian/Ubuntu

Set up Pico SDK

git clone https://github.com/raspberrypi/pico-sdk.git
RUN cd pico-sdk && git submodule update --init

# Set the PICO_SDK_PATH environment variable to where you just cloned the repo above.
export PICO_SDK_PATH=/path/to/pico-sdk

Install the toolchain needed to build Pico projects.

sudo apt update && apt install -y --no-install-recommends git ca-certificates make cmake gcc g++ gcc-arm-none-eabi libnewlib-arm-none-eabi libstdc++-arm-none-eabi-newlib python3 python3-venv nodejs npm clang

VS Code + Dev Container (Docker)

Use Microsoft's documentation on running Visual Studio Code in a Docker container using the Dev Containers extension.

The Dockerfile included in the repo will be sufficient for building this project.

Build Project

Run the following commands in the root of the repo.

mkdir build
cd build
cmake ..
make

Customize Configuration

GPIO Output

Edit the header file config/gpio_output_config.h

Gamepad Input Mapping

Edit the configuration files below in config/CD74HC4067SM96 depending on how many CD74HC4067SM96 you are using and which pins are being used specifically, both of the RP2040 and of the CD74HC4067SM96.

• config/CD74HC4067SM96/CD74HC4067SM96_00_config.h
• config/CD74HC4067SM96/CD74HC4067SM96_01_config.h
• config/CD74HC4067SM96/CD74HC4067SM96_02_config.h
• config/CD74HC4067SM96/CD74HC4067SM96_03_config.h

For each of the above configuration files, you will want to modify the following #define to prior to building the firmware.

• Set CD74HC4067SM96_##_ENABLED to true to enable that CD74HC4067SM96 module where ## is the number of the CD74HC4067SM96 number (i.e. CD74HC4067SM96_00_config is CD74HC4067SM96 00)
• Set the Analog GPIO pin (GP26-GP29)
• Set a ButtonAction for each CD74HC4067SM96_##_AA_ACTION where ## is the number of the CD74HC4067SM96 number and AAis the CD74HC4067SM96 (i.e. CD74HC4067SM96_00_15_ACTION is the pin 15 of CD74HC4067SM96 00)

ButtonActions

ButtonAction	GP2040	Xinput	Switch	PS3/4/5	Dinput	Arcade
NONE	NONE	NONE	NONE	NONE	NONE	NONE
BUTTON_PRESS_DPAD_UP	UP	UP	UP	UP	UP	UP
BUTTON_PRESS_DPAD_DOWN	DOWN	DOWN	DOWN	DOWN	DOWN	DOWN
BUTTON_PRESS_DPAD_LEFT	RIGHT	RIGHT	RIGHT	RIGHT	RIGHT	RIGHT
BUTTON_PRESS_DPAD_RIGHT	LEFT	LEFT	LEFT	LEFT	LEFT	LEFT
BUTTON_PRESS_LS_UP
BUTTON_PRESS_LS_DOWN
BUTTON_PRESS_LS_LEFT
BUTTON_PRESS_LS_RIGHT
BUTTON_PRESS_RS_UP
BUTTON_PRESS_RS_DOWN
BUTTON_PRESS_RS_LEFT
BUTTON_PRESS_RS_RIGHT
BUTTON_PRESS_B1	B1	A	B	Cross	2	K1
BUTTON_PRESS_B2	B2	B	A	Circle	3	K2
BUTTON_PRESS_B3	B3	X	Y	Square	1	P1
BUTTON_PRESS_B4	B4	Y	X	Triangle	4	P2
BUTTON_PRESS_L1	L1	LB	L	L1	5	P4
BUTTON_PRESS_R1	R1	RB	R	R1	6	P3
BUTTON_PRESS_L2	L2	LT	ZL	L2	7	K4
BUTTON_PRESS_R2	R2	RT	ZR	R2	8	K3
BUTTON_PRESS_S1	S1	Back	Minus	Select	9	Coin
BUTTON_PRESS_S2	S2	Start	Plus	Start	10	Start
BUTTON_PRESS_A1	A1	Guide	Home	PS	13	NONE
BUTTON_PRESS_A2	A2	NONE	Capture	NONE	14	NONE
BUTTON_PRESS_L3	L3	LS	LS	L3	11	LS
BUTTON_PRESS_R3	R3	RS	RS	R3	12	RS

Acknowledgements

• [GP2040-CE] - Inspiration for creating the project and making great gamepad firmware