PS2 Joypad Server

Use PlayStation 2 input accessories that cheap "PS2 to USB" dongles don't recognize by dumping gamepad input into UDP packets.

Building from source

(Tested only on Linux)

0. Set up PS2SDK
1. Run make

Configuration

• Set up OPL networking within OPL and save;
• Copy the ELF to somewhere accessible (e.g.: MC1:/APPS/JOYSRV.ELF);
• Configure FMCB shortcuts.

The client

There must be a UDP listener at:

• Same IP as configured in OPL;
• The port for SMB in OPL plus 1024:
  • If you used the default port 445, it'll direct UDP towards port 1469.
• Capable of parsing and creating input in the system.

Known ready-to-use implementations

• ps2joycln

Data format

Expect 71 bytes per datagram. The last byte will always be a '\n'. Therefore looking like:

1006200079FFFF8080808000000000000000000000000000000000000000000000005A - DualShock 2

2002200041FFFF0000000000000000000000000000000000000000000000000000005A - 2011 generic Dance Mat

After converting the trimmed hex string into a ByteArray:

• 1st byte: where is the controller connected
  • 1st nibble: Controller connected to port 1 or 2
  • 2nd nibble: [unused] The slot of the multitap that the gamepad is connected to
• 2nd byte: Pad state. Usable if either 2 or 6; unusable otherwise (documentation on PAD_STATE_*)
• 3rd byte: Pad read status. Usable if non-zero; unusable otherwise (documentation on padRead())
• 4th to 35th byte: struct pad_button_status
  • 4th byte: u8 ok - zero is good
  • 5th byte: u8 mode - ???
  • 6th and 7th bytes: u16le btns - bit array for digital input for buttons; 1 = released, 0 = pressed.
    • The field itself stores little endian, but here I show big endian for clarity:
    • 0x0001 - 0b0000000000000001 - PAD_SELECT
    • 0x0002 - 0b0000000000000010 - PAD_L3
    • 0x0004 - 0b0000000000000100 - PAD_R3
    • 0x0008 - 0b0000000000001000 - PAD_START
    • 0x0010 - 0b0000000000010000 - PAD_UP
    • 0x0020 - 0b0000000000100000 - PAD_RIGHT
    • 0x0040 - 0b0000000001000000 - PAD_DOWN
    • 0x0080 - 0b0000000010000000 - PAD_LEFT
    • 0x0100 - 0b0000000100000000 - PAD_L2
    • 0x0200 - 0b0000001000000000 - PAD_R2
    • 0x0400 - 0b0000010000000000 - PAD_L1
    • 0x0800 - 0b0000100000000000 - PAD_R1
    • 0x1000 - 0b0001000000000000 - PAD_TRIANGLE
    • 0x2000 - 0b0010000000000000 - PAD_CIRCLE
    • 0x4000 - 0b0100000000000000 - PAD_CROSS
    • 0x8000 - 0b1000000000000000 - PAD_SQUARE
  • 8th byte: u8 rjoy_h - 00=left, FF=right, 80=neutral - Right analog stick
  • 9th byte: u8 rjoy_v - 00=up,__ FF=down,_ 80=neutral - Right analog stick
  • 10th byte: u8 ljoy_h - 00=left, FF=right, 80=neutral - Left analog stick
  • 11th byte: u8 ljoy_v - 00=up,__ FF=down,_ 80=neutral - Left analog stick
  • 12th byte: u8 right_p - Pressure senstivity for right directional - 00=released, FF=full pressure
  • 13th byte: u8 left_p - Pressure senstivity for left directional - 00=released, FF=full pressure
  • 14th byte: u8 up_p - Pressure senstivity for up directional - 00=released, FF=full pressure
  • 15th byte: u8 down_p - Pressure senstivity for down directional - 00=released, FF=full pressure
  • 16th byte: u8 triangle_p - Pressure senstivity for triangle - 00=released, FF=full pressure
  • 17th byte: u8 circle_p - Pressure senstivity for circle - 00=released, FF=full pressure
  • 18th byte: u8 cross_p - Pressure senstivity for cross - 00=released, FF=full pressure
  • 19th byte: u8 square_p - Pressure senstivity for circle - 00=released, FF=full pressure
  • 20th byte: u8 l1_p - Pressure senstivity for L1 - 00=released, FF=full pressure
  • 21th byte: u8 r1_p - Pressure senstivity for R1 - 00=released, FF=full pressure
  • 22th byte: u8 l2_p - Pressure senstivity for L2 - 00=released, FF=full pressure
  • 23th byte: u8 r2_p - Pressure senstivity for R2 - 00=released, FF=full pressure
  • 24th to 35th byte - ???