## PSX to USB HID controller converter

rp2040 (raspberry-pi pico) based device to convert PSX controllers to USB HID 
gamepads.

![Photo of psx2usb](./jpg/photo_psx2usb.jpg)

### Components

- one rp2040 board with 5 GPIO available
- one PSX controller connector (female)

### Selected pinout

The PSX connector controller port has the following pinout:

  1. Data
  2. Command
  3. 7.5V Rumble motor
  4. GND (also connected to the shield)
  5. 3.3V
  6. Attention
  7. Clock
  8. Not connected
  9. Acknowledge

![PSX controller pinout](./jpg/controller-pinout.jpg) [Image from consoledev.net]



| PSX signal  | rp2040 GPIO | Direction | Description |
| ----------- | ----------- | --------- | ----------- |
| Data        | 13 | IN | Receive ID, buttons and adc data from controller |
| Command     | 12 | OUT | Send read commands to controller |
| Attention   | 6 | OUT | Chip select (active low) for controller |
| Clock       | 5 | OUT | Clock serial communication for DATA/CMD lines |
| Acknowledge | 3 | IN  | Acknowledge command RX, active low |







### Installation

 * Run cmake && make
 * Start rp2040 in usb storage mode. Copy psx2usb.u2f to the device.
 * Reboot rp2040