Needed:
OE LAT CLK A B C RGB1 RGB2
Total: 12 pins
HUB75:
Pin 1 R1 G1 Pin 3 B1 GND Pin 5 R2 G2 Pin 7 B2 GND Pin 9 A B Pin 10 C GND Pin 11 CLK LAT Pin 13 OE GND G
GND
3.3V
Usable pins:
Pin 3 OE Pin 11 CLK Pin 13 LAT Pin 15 C Pin 19 A Pin 21 B Pin 25 R2/G2 B2=GND Pin 27 R1/G1 B1=GND
Breadboard 2: PA0 - HWIC 3 - OE PB0 - HWIC 11 - LAT PB1 - HWIC 45 - CLK PB2 - HWIC 12 - D PB3 - HWIC 46 - C PB4 - HWIC 13 - B PB5 - HWIC 47 - A PB6 - HWIC 14 - E PB7 - HWIC 48 - B2
PD0 - HWIC 18 - G2 PD1 - HWIC 52 - R2 PD2 - HWIC 19 - B1 PD3 - HWIC 53 - G1 PD4 - HWIC 20 - R1
PD5 - HWIC 54 - B3 PD6 - HWIC 21 - G3 PD7 - HWIC 55 - R3 PE0 - HWIC 56 - B4 PF0 - HWIC 25 - G4 PH0 - HWIC 32 - R4
Connector swap:
PA0 - HWIC 3 -> HWIC 20 - OE PB0 - HWIC 11 -> HWIC 45 - LAT PB1 - HWIC 45 -> HWIC 11 - CLK PB2 - HWIC 12 -> HWIC 46 - D PB3 - HWIC 46 -> HWIC 12 - C PB4 - HWIC 13 -> HWIC 47 - B PB5 - HWIC 47 -> HWIC 13 - A PB6 - HWIC 14 -> HWIC 48 - E PB7 - HWIC 48 -> HWIC 14 - B2
PD0 - HWIC 18 -> HWIC 52 - G2 PD1 - HWIC 52 -> HWIC 18 - R2 PD2 - HWIC 19 -> HWIC 53 - B1 PD3 - HWIC 53 -> HWIC 19 - G1 PD4 - HWIC 20 -> HWIC 54 - R1