An Arduino Uno library for LED MAtrices using the HUB08 Interface
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Library only works for Arduino Uno and others based on the ATmega328. The pins are hard coded into the library for better performance, only port D and the SPI Pins are used.

LA / A -> Digital Pin 4

LB / B -> Digital Pin 5

LC / C -> Digital Pin 6

LD / D -> Digital Pin 7

CLK -> Digital Pin 13

R1 / R -> Digital Pin 11

OE / EN -> Digital Pin 3

LAT / STB -> Digital Pin 2

The library increases the Timer2 frequency so that the PWM runs on 32 kHz. Affected are only the pins 3 and 11, both occupied by the interface.