Sony PlayStation controller Ian Tenney Paul Haugen

1. Sony PlayStation controllerIan TenneyPaul Haugen

2. Research • Problem: How does a controller communicate with a PlayStation? There is no data sheet. • Solution: Observe how an official controller communicates with a PlayStation, using a Logic Analyzer.

3. Communication Protocol • Format: • Each transmission is 5 – 9 bytes long, LSB. • ACK each byte except the last one. • SPI / Full Duplex • Commands: • 12 Different commands, 4 different Modes. • SPI: • MISO, MOSI, ATN, XCLK • Also, the ACK line. • Header: • First 3 bytes: Hello, Command, Slack Standard Button Polling response in Digital Mode

4. Development • How we tested our controller along the way: • Connecting it to a PS2 • PC verification by MotioninJoy Tool • Debugging in the HID Properties Tool • Oscilloscope • Defined Goal: • Our objective was to mimic the official ps2 controller’s response to commands from the PS2.

5. Circuit Schematic

6. DEMO

7. FUTURE ADDITIONS • Alternate Input Methods: • Touchpads • Memory: • Record & Playback • Macros: • A string of predetermined inputs from one button push

8. Acknowledgements • Resources: • Curious Inventor: http://store.curiousinventor.com/guides/PS2/ • Playstation.txt: http://www.raphnet.net/electronique/psx_adaptor/Playstation.txt • Thank you: • Professor Kruger – General Considerations • Professor Maxted – Use of Logic Analyzer • Matt Stuefen – Hardware Concerns