![]() ![]() ![]() My Arduino firmware is available in the GitHub repo here. Report the first (0) button state to buttonState Here is a bare-basic example of how to use the HID Joystick Library : #include Note: Arduino IDE 1.6.6 (or above) is required for this library. Luckily, the library has a (currently Beta) version 2.0 which allows the number of buttons to be specified. I wanted to emulate only one joystick but I wanted at least 60 buttons. Initially, the Arduino HID emulation was limited to Keyboard and Mouse functionality but MHeironimus has developed the HID Joystick Library.Īt the time I am writing this, the release version of the Joystick Library is v1.0.1 which allows multiple or single joysticks with a maximum or 32 buttons to be emulated by the Arduino. Reads the current state of pin 0 on the MCPīool currentInputState = myMCP.digitalRead(0) Here is a bare-basic example of how to use the MCP23017 Library : #include I am providing basic examples of how to use the libraries in this section. With sufficient I/O pins available (and my buttons and enclosure in-hand), I assembled amd wired it all up. I have used four MCP23017 ICs giving me 64 additional I/O pins, sacrificing only 2 of the Arduino GPIO pins for I 2C serial communication with the chips. Adafruit’s MCP23017 Library makes interfacing with these pins as easy as it is with the built-in Arduino pins.The 16 I/O pins include pull-up resistors meaning that discrete resistors for each button weren’t needed and,.Multiple chips can be used on the serial bus and each adds 16 additional I/O pins.The differences (and the reasons I chose these chips) are as follows: It works in a similar manner to a standard parallel to serial shift register. The Microchip MCP23017 IC is a 16-bit I/O expander with an I 2C serial control interface. This would’ve added complexity so the workaround I chose for this was to use external devices to add more, as this reduced the complexity of the Arduino software and the hardware required to support the switches. There are many workarounds including wiring the buttons in a matrix to and cyclically read them by row. ![]() The only limitation with Arduinos for a project like this is that they provide limited general purpose Input/Output (GPIO or I/O) pins. This is based on the Leonardo range of Arduinos which allow Human Interface Device (HID) emulation as the micro-controller itself (ATmega32u4) has built-in USB communication, which eliminates the need for a secondary processor. The specific Arduino I chose was an “eBay knockoff” of the 5V/16MHz Pro Micro. For this, I chose the Arduino as the micro-controller platform as I’ve used them previously, they are simple, and they work straight out of the box. Whilst I was waiting I started thinking about how to drive it. Next, I chose the type of buttons and the enclosure I wanted and ordered those. I settled at around 60 after deciding which SC functions would be mapped to the panel itself, the buttons on the sticks, neither or both. The first step in designing the control panel was to determine how many buttons I wanted to implement. they can be configured as left or right handed, and.The factors that decided this choice were: I decided upon two Thrustmaster T.16000m joysticks. Having decided on the HOSAS setup, the next question was which joysticks I wanted to use. My rationale is that the game is primarily space based and the additional axes that the dual sticks afford, provide fine control of all three “strafing” directions as well as all three rotational “Pitch, Roll and Yaw” rotations. The first thing I decided was that I wanted my flight control to be a HOSAS (Hands On Stick And Stick) rather than the perhaps more common HOTAS (Hand On Throttle And Stick) setup. Note: I only outline setting up the SC “flight” functionality as I primarily use keyboard and mouse for other parts of the game such as First-Person Shooting (FPS). I saw this problem as something that could be overcome by designing a physical “control panel” which would have the most important functions mapped to a dedicated button. When I started playing Star Citizen (SC) I found the key combinations required during “flight” overwhelming. ![]()
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