WIP code for a rhythm game controller using a Raspberry Pi Pico. Intended for SDVX or IIDX but is capable of handling 11 buttons, 10 LEDs, 1 WS2812B RGB strip, and 2 encoders.

Demo of this firmware running on Pocket SDVX Pico, purchasable at https://discord.gg/MmuKd73XbY

Currently working/fixed:

• Gamepad mode - default boot mode
• NKRO Keyboard & Mouse Mode - hold first button(gpio4) to enter kb mode
• HID LEDs with Reactive LED fallback
• ws2812b rgb on second core
• 2 ws2812b hid descriptor zones
• sdvx/iidx spoof - Tested on EAC - checkout branches release/pocket-sdvx-pico or release/pocket-iidx
• 1000hz polling
• Reversable Encoders with debouncing
• Switch and LED pins are now staggered for easier wiring
• Fix 0-~71% encoder rollover in gamepad mode, uint32 max val isn't divisible evenly by ppr*4 for joystick - thanks friends
• HID LEDs now have labels, thanks CrazyRedMachine

TODO:

• store configuration settings in a text file? consider implementing littlefs https://github.com/littlefs-project/littlefs https://www.raspberrypi.org/forums/viewtopic.php?t=313009 https://www.raspberrypi.org/forums/viewtopic.php?p=1894014#p1894014
• Store last mode in flash memory https://www.raspberrypi.org/forums/viewtopic.php?t=305570
• debounce on switches

How to Use:

• For basic flashing, see README in build_uf2
• Otherwise, setup the C++ environment for the Pi Pico as per https://datasheets.raspberrypi.org/pico/getting-started-with-pico.pdf
• Build pico-examples directory once to ensure all the tinyusb and other libraries are there. You might have to move the pico-sdk folder into pico-examples/build for it to play nice.
• Move pico-sdk back outside to the same level directory as Pico-Game-Controller.
• Open Pico-Game-Controller in VSCode(assuming this is setup for the Pi Pico) and see if everything builds.
• Tweakable parameters: Pinout, bindings in pico_game_controller.c, USB device reporting as SDVX/IIDX(con_mode) in usb_descriptors.c

Thanks to:

• Everyone in the Cons & Stuff Discord for providing near instant support to questions.
• https://github.com/hathach/tinyusb/tree/master/examples/device/hid_composite
• https://github.com/mdxtinkernick/pico_encoders for encoders which performed better than both interrupts and polling.
• My SE buddies who helped come up with a solution for the encoder rollover edge case scenario.
• https://github.com/Drewol/rp2040-gamecon for usb gamepad descriptor info.
• https://github.com/veroxzik/arduino-konami-spoof for konami spoof usb descriptor info.
• https://github.com/veroxzik/roxy-firmware for nkro descriptor and logic info.
• KyubiFox for bringing clkdiv to my attention for encoder debouncing