Arduino library for Adafruit 16x32 and 32x32 RGB LED matrix panels.
Adapted for Spark by Paul Kourany, June 2014
The orginal Arduino library used a lot of direct I/O port write tricks and assembler to achieve a calculated 283Hz refresh rate for a 16x32 panel.
The current Spark version uses bit-banging for the output which could be optimized using inline assembler and full GPIO port writing. This may be added in the next release. As it stands the calculated refresh rate for a 16x32 panel is 90Hz.
This library requires the Adafruit_mfGFX and SparkIntervalTimer libraries
Wiring between the Spark and 16x32 or 32x32 display is as follows:
16x32 Pin Spark Pin
--------------------------
GND GND
CLK D6
OE D7
LAT A4
A A0
B A1
C A2
D A3 //32x32 display only
R1 D0 G1 D1 B1 D2 R2 D3 G2 D4 B2 D5 The display needs its own 5V supply.
Connect, compile, flash and run.