Adapt various input devices to various output devices. https://github.com/OpenRetroPad/OpenRetroPad
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6.0 KiB

OpenRetroPad

Adapt various input devices to various output devices.

Currently supported inputs: SNES/NES, Sega Genesis/Megadrive/Atari, Playstation (and PS2) Digital and Dual shock, Nintendo 64, Nintendo Gamecube

Currently supported outputs: bluetooth-hid gamepad, usb-hid gamepad, nintendo switch usb gamepad, wireless usb-hid gamepad over radio

OpenRetroPad is written and tested on an Arduino Pro Micro and an ESP32, there is also an in-progress custom PCB being developed at OpenRetroPadHW

Build using PlatformIO using pio run or pio run -e $board-$input-$output for a specific target/env.

env's are laid out like $board-$input-$output supported values:

  • $board: micro, esp32
  • $input: snes, genesis, psx, n64, gc, radio, debug
  • $output: radio, usb, usbradio, switchusb, bt, debug
  • please note not all boards are compatible with all inputs/outputs, for example esp32 can only do bt, micro can only do radio or usb

Wiring

(quick plea: if you are good at drawing diagrams, please help!)

DB-25 Pinout

DB-25 Pins Arduino Pro Micro GPIO ESP32 GPIO Radio SNES PSX N64 Gamecube Genesis Dreamcast
1 TX 1 19 - LATCH - - - P1-1 P1-DATA1
2 SDA 2 21 - CLOCK DATA P1-DATA P1-DATA P1-3 P1-DATA5
3 SCL 3 22 - P1-DATA CMD - - P1-4 -
4 Analog 4 15 - P2-DATA ATT - - P1-6 -
5 Digital 5 16 - P3-DATA CLK - - P1-7 -
6 Analog 6 2 - P4-DATA - - - P1-9 -
7 Digital 7 17 CE - - - - P2-7* -
8 Analog 8 4 CSN - - - - - -
9 Analog 9 > 1k Ω 35 > 1k Ω - 330 Ω 100 Ω 220 Ω 680 Ω 470 Ω 820 Ω
10 Analog 10 32 - - - - - - -
11 RX 0 18 - - - - - P1-2 -
12 - - - - - - - - - -
13 - - - - - - - - - -
14 MISO 14 12 MISO - - - - P2-6* -
15 SCLK 15 14 SCLK - - - - P2-9* -
16 MOSI 16 13 MOSI - - - - - -
17 - - - - - - - - - -
18 Analog 18 27 - - - - - P2-1 -
19 Analog 19 26 - - - - - P2-2 -
20 Analog 20 25 - - - - - P2-3 -
21 Analog 21 33 - - - - - P2-4 -
22 - - - - - - - - - -
23 3.3V VCC - 3.3V VCC 3.3V VCC - - 3.3V VCC 3.3V VCC - -
24 5V VCC 5V VCC OUT 5V VCC 5V VCC 5V VCC 5V VCC - 5V VCC PX-5 5V VCC 5V VCC
25 GND GND GND GND GND - GND GND PX-8 GND GND
  • 2nd player Genesis is incompatible with Radio because it uses the same pins, 1 player Genesis is compatible Ω This is optional and only used for dongle detection. On the microcontroller side, put a 1k resistor between DB-25 pin 9 and VCC (3.3v for ESP32, 5V for Micro). On each controller dongle, put a resistor of the given value between DB-25 pin 9 and GND.

All connected pins can also function as Digital pins.

Code and/or inspiration was (or will be) taken from these places, in no particular order: