Useful information for working with this code.
Library - MatrixPanel-DMA
Pin values are integers. Integer pin values corresponding to GPIO pins are the same value (e.g. 18 = GPIO 18).
R1 | G1
B1 | GND
R2 | G2
B2 | E
A | B
C | D
CLK | LAT
OE | GND
#define R1_PIN 25
#define G1_PIN 26
#define B1_PIN 27
#define R2_PIN 14
#define G2_PIN 12
#define B2_PIN 13
#define A_PIN 23
#define B_PIN 19
#define C_PIN 5
#define D_PIN 17
#define E_PIN 18 // (Normally -1)
#define LAT_PIN 4
#define OE_PIN 15
#define CLK_PIN 16