FreeJoy

FreeJoy is widely configurable game device controller based on cheap STM32F103C8 microcontroller board. It allows you to create your own HOTAS, pedals, steering wheel device or customize a purchased one.

Getting started

Welcome to our wiki pages to get instuctions how to flash firmware to your board and how to configure device for your application.

Features

FreeJoy supports the following external periphery:

8 analog inputs (12 bit output resolution)
axis to buttons function (up to 12 buttons per axis)
buttons/encoders to axis functions
128 digital inputs (buttons, toggle switches, hat povs, encoders)
5 shift modificators
4 hat povs
16 incremental encoders
shift registers 74HC165 and CD4021
digital sensors TLE5010/5011, AS5600, MLX90393 (SPI interface only)
external ADCs ADS1115 and MCP3201/02/04/08
3 PWM channels for lighting
24 LEDs (single or matrix) bindable to button's states
device name and other USB settings

Axes

FreeJoy supports up to 8 analog inputs at pins A0-A7 and digital sensors as axes sources. Every axis has its own settings as:

Source/destination (X, Y, Z, Rx, Ry, Rz, Slider1, Slider2)
Output enabling/disabling
Resolution
Calibration (manual or auto)
Smoothing (7 levels of filtration)
Inversion
Deadband (dynamic or center)
Axis offset option (magnet offset)
Curve shaping
Functions for combined axes
Buttons from axes
Axes from buttons/encoders

Buttons

FreeJoy allows you to connect up to 128 digital inputs as single inputs (tied to VCC or GND), matrix of buttons, shift register inputs and axes to buttons inputs. Inputs can be configured as:

Regular push button
Inverted push button
Toggle switch ON/OFF
Toggle switch ON
Toggle switch OFF
POV hat button
Incremental encoder input
Radio buttons
Sequential buttons
5 shifts

FreeJoy Configurator utility

FreeJoy configuration is possible using external utility.