Race Wheel Software

By Matthew Hait

Software for USB sim racing steering wheel running on FreeRTOS.

GPIO BOM

User Inputs

12 - Buttons
- OP: One output each
- GPIO: GP2-13
5 - Encoders
- PN: Encoder_CTS-288T232R161A2
- OP: Two-bit encoder, Two outputs, Interrupts needed
- GPIO: GP14-21,GP22,GP28
2 - Paddles (Buttons)
- OP: One output each
- GPIO: GP0-1 Move to save UART for future projects
2 - Hall Effect for clutch
- OP: Analog
- GPIO: 26, 27
1 - Multi-direction Switch
- PN: RKJXT1F
- OP: 4 POS + rotate + press
- GPIO: TBD

Other

Internal Temp Sensor
- OP: P.589 RP2040 Datasheet
- GPIO: ain_sel #4

Outputs

USB HID Gamepad
- TinyUSB:
  - See examples "pico-examples\usb\device\dev_hid_composite"
  - https://github.com/hathach/tinyusb/tree/master/src/portable/raspberrypi/rp2040
  - https://github.com/hathach/tinyusb/tree/master/examples/device/hid_composite_freertos
- CDC ACM port
- DMA if used: https://www.youtube.com/watch?v=-Wh3SIAl0Ic
- GPIO
  - https://raspberrypi.github.io/pico-sdk-doxygen/group__hardware__gpio.html

Tasking

FreeRTOS
- https://github.com/smittytone/RP2040-FreeRTOS

Pinout for 4 Pin Aviation Connector

1: PWR - Red 2: Rx - White 3: Gnd - Black 4: TX - Green

Commands I forget

export PICO_SDK_PATH=/mnt/c/Users/PoisonGryphon/Documents/My\ Files/proj/pico/pico-sdk/