Raspberry PI GPIO Wiring

SNES/NES controller

Connect SNES/NES 5V to RPI 3.3V (NOT 5V!)

Connect SNES/NES GND to RPI GND

Connect SNES/NES Clock to GPIO 2

Connect SNES/NES Latch to GPIO 3

Connect SNES/NES Data to GPIO 4

RGB LED Matrix:

Connect ADDRESS A to GPIO 5

Connect ADDRESS B to GPIO 6

Connect ADDRESS C to GPIO 13

Connect ADDRESS D to GPIO 19

Connect R1 to GPIO 10

Connect G1 to GPIO 09

Connect B1 to GPIO 11

Connect R2 to GPIO 25

Connect G2 to GPIO 08

Connect B2 to GPIO 07

Connect Enable to GPIO 16

Connect Clock to GPIO 20

Connect Latch to GPIO 21

Connect ALL LED Pannel GNDs via header to RPI GPIO GNDs, you should have 3 (Trust me, the more you have, the less flicker and glitches you will have with the LED Matrix.) (And don't bother with connecting the GND from the PSU to a RPI GPIO)

Check your wiring before powering up.