Obtainable w/ rOna I/O board.
- Familiar form factor
- Removable screw terminals makes reconnecting buttons more convenient
- Tool-less spring terminal option available (when using Phoenix 1952348)
- Rich I/O
- Analog stick port
- Simultaneous access to hardware SPI, I2C and basic UART via EXT port
- SparkFun Qwiic/Adafruit STEMMA-QT compatible I2C quick connect port
- Possibility to support various proprietary gamepad/joystick interfaces with RP2040 PIO and spare GPIO on EXT port
Below is the preferred pin assignment for this board. Note that every pin can be remapped or re-purposed when necessary and this list only serves as a guideline. Still, follow this list when developing firmware if you wish to keep wiring compatibility with other fightstick PCBs and preserve the meaning of the silk screens.
| RP2040 Pin | GP2040 Pin | Label | Purpose |
|---|---|---|---|
| 0 | DPad Down | D | D-Button Down |
| 1 | DPad Up | U | D-Button Up |
| 2 | DPad Left | L | D-Button Left |
| 3 | DPad Right | R | D-Button Right |
| 4 | A1 | PS | PS Button |
| 5 | S1 | SHR | Share Button |
| 6 | S2 | OPT | Option Button |
| 7 | B3 | SQR | Square Button |
| 8 | B4 | TRI | Triangle Button |
| 9 | R1 | R1 | R1 Button |
| 10 | L1 | L1 | L1 Button |
| 11 | B1 | XRO | Cross Button |
| 12 | B2 | CIR | Circle Button |
| 13 | R2 | R2 | R2 Button |
| 14 | L2 | L2 | L2 Button |
| RP2040 Pin | GP2040 Pin | Label | Purpose |
|---|---|---|---|
| 15 | A2 | TP | Touchpad Click Button |
| 16 | - | DI | SPI0 DI |
| 17 | - | CS | SPI0 CS |
| 18 | - | CLK | SPI0 CLK |
| 19 | - | DO | SPI0 DO |
| 20 | - | TX | UART1 TX |
| 21 | - | EXT/RX | UART1 RX |
| 22 | R3 | R3 | R3 Button |
| 23 | L3 | L3 | L3 Button |
| 24 | Display | SDA | I2C0 SDA |
| 25 | Display | SCL | I2C0 SCL |
| 26/ADC0 | - | RY | Analog Stick RY |
| 27/ADC1 | - | Stick/RX | Analog Stick RX |
| 28/ADC2 | - | LY | Analog Stick LY |
| 29/ADC3 | - | LX | Analog Stick LX |
Any pluggable terminal block plugs that mate with a Phoenix MINI COMBICON MC terminal block header should be usable with Alpaca-OwO. Notable configurations include the basic screw terminal (1840447), the tool-less spring terminal (1939989) and the low profile spring terminal (1952348). Generic replacements of these connectors can be found on Aliexpress or LCSC. Note that the locking variants will not fit and thus not supported.