Based on https://github.com/dmadison/ArduinoXInput

- Install Arduino IDE hardware:
https://github.com/dmadison/ArduinoXInput_AVR

- Install Arduino IDE library from Library manager:
XInput by David Madison

- Tester from Windows Store:
Game Controller Tester

- Doesn't go to flashing mode automatically. Connect RST to GND to get Arduino Pro Micro to programming mode.


- Arduino Pro Micro needs PB0/SS-pin to work. And it is not broken out. So no SPI for PSX-controller I guess? 
https://forum.arduino.cc/index.php?topic=427828.0
- It could be used as pin 17 in code, if led could be disabled?

## New PS-library
- https://github.com/SukkoPera/PsxNewLib
- https://github.com/SukkoPera/PsxControllerShield
- https://github.com/SukkoPera/PsxControllerShield/blob/master/doc/schematics.pdf

Pin | Uno | Pro Micro
--- | --- | ---
MISO | D12 (PB4) | D14 (PB3)
MOSI | D11 (PB3) | D16 (PB2)
SCK | D13 (PB5) | D15 (PB1)
SS | D10 (PB2) | D17 (PB0/RX_LED)