adding analog support to my barcade
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@mitu sorry to bother you since you seem to be really clued up on everything pi input related I would like to ask a quick question. Do you know if there is any way I could hook one of these up to a pi and get it to register as a input controller so i can add an input axis. I could turn an ardunio into a hid controller if need be if its not possible. I just want to add a quick axis controller for my barcade since joysticks are digital only.
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Well, I'm not that skilled with electronic circuitry, but that joystick could fit the bill. I noticed it says 5V, so you might need a converter instead of a full Arduino board, since the PI's GPIOs are 3.3V LL.
For the device you found, it seems there are a few tutorials already:
- https://projects-raspberry.com/using-a-joystick-on-the-raspberry-pi-using-an-mcp3008/
- https://retropie.org.uk/forum/topic/12277/how-to-set-up-mcp3008-adafruit-analog-joystick-rpi (with external links to the project).
- https://github.com/virtualbjorn/Raspberry-Pi-3-Joystick-with-MCP3008 (with an additional 'driver' for the joystick).
- RPI forum post started by the 1st tutorial link - https://www.raspberrypi.org/forums/viewtopic.php?t=144710
Of course, you might have already found the links above and based on it you found the actual device :). As I said, I'm an expert, so take this with a grain of salt - maybe others can chime in.
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@mitu it should run just fine on 3.3v as it is. I have run tons of 5v controllers (including rapid fire controllers) at 3.3v no problem with analog sticks on them.
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yea the voltage shouldnt be an issue i have a few of these lying about for ardunio projects from before cheers for the links!
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The actual part of programming wiring it and reading the data isint a problem at all. The part i need help with is how to map it as joystick device. Ill read them guides in more detail thanks again
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@grant2258 Hm, looks like creating an analog joystick might not be so straightforward. The approach in the links I gave earlier are for either reading the values or for creating a digital joystick (like the Adafruit joystick bonnet). Most of the script use Pythong to create a joystick device using the
uinputmodules.
I found one (so far) example (based on the 1st link) which seems to simulate an analog joystick with full axis movement based on the GPIO input at
https://github.com/qubecad/Pi_stick/blob/master/analog_joycestick.py (from this page). I'm sure there are other solution, more user friendly, haven't found another one yet.As for integrating into games, I think you'll be presented with a standard joystick (
/dev/input/js0) that can be read like any other joystick -
Well i could hack code into mame2003-plus to read it thats not a good global solution though so ill add it to my todo list which isint too long atm!
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