type: 34
data_length:
2 bytes to change value only
3 bytes to change value and configure function and drive mode
data[0]: index of GPIO/GPO to modify
0 = GPIO[0] = (reserved, additional hardware required)
1 = GPIO[1] = (reserved, additional hardware required)
2 = GPIO[2] = (reserved, additional hardware required)
3 = GPIO[3] = (reserved, additional hardware required)
4 = GPIO[4] = (reserved, additional hardware required)
5 = GPO[5] = LED 3 (bottom) green die
6 = GPO[6] = LED 3 (bottom) red die
7 = GPO[7] = LED 2 green die
8 = GPO[8] = LED 2 red die
9 = GPO[9] = LED 1 green die
10 = GPO[10] = LED 1 red die
11 = GPO[11] = LED 0 (top) green die
12 = GPO[12] = LED 0 (top) red die