09-16-2020, 03:43 AM
(09-16-2020, 03:02 AM)Flavor Wrote: Are you planning to use some specific buttons/switches?
All the digital buttons are wired directly to GPIO pins on the Pi CM3 (or Zero). There aren't any resistors or anything like that in-between. Furthermore, you can use any GPIO you want. You would just edit the /etc/modprobe.d/mk_arcade_joystick.conf file accordingly.
You could leave the current DPAD alone and wire up 4 tac switches deadbug style with wires running to open GPIO. The "v1.3" board has some open GPIO, but they're a bit small. If you're not using an add-on board, you could easily use GPIO 40-45 that are between the USB socket and the ABXY button area.
After investigating, I don't see a safe way to drill holes in the dpad area.
Thanks for the quick reply. Thanks for confirming, I had a suspicion that the board was multilayered. I have some left over two pin tac switches that I used to replace the ABXY buttons with. I think I can 3D print a switch holder to keep the switches in place and deadbug mount using the 40-45 GPIO, I'm already using one of the GPIO for a rear button I mounted and remapped the hotkey to.