nopnop2002 / Arduino-MatrixControl

An Arduino library for MAX7219 and MAX7221 Led Matrix display drivers

Arduino-MatrixControl

MatrixControl is an Arduino library for MAX7219 and MAX7221 Led Matrix display drivers.

Background

This library was developed based on this.
The original library also supports 8-segment LEDs, but this library does not support 8-segment LEDs.
Only supports cascaded 8x8 Led Matrix.

Change from original

While the original library is highly versatile, the processing of cascaded LEDs is inefficient.
This library speeds up the processing of cascaded LEDs.

The original library used software SPI, but this library can use both software SPI and hardware SPI.

• Software SPI(Default)
  #define BITBANG 1

• Hardware SPI
  #define BITBANG 0

Processing time using LedControl-Scroll-FullSpeed

diffMillis[LedControl]=1973[ms]
diffMillis[LedControl]=1973[ms]
diffMillis[LedControl]=25565[ms]
diffMillis[LedControl]=25574[ms]

Processing time using MatrixControl-Scroll-FullSpeed

It's up to 23 times faster.

diffMillis[MatrixControl]=293[ms]
diffMillis[MatrixControl]=292[ms]
diffMillis[MatrixControl]=1093[ms]
diffMillis[MatrixControl]=1094[ms]

Documentation

Documentation for the library is on the Github Project Pages.
This library is compatible with the original library.

Install

The library can be installed using the standard Arduino library install procedure.

Wiring

See source code.

Examples

• MatrixControl_Basic
  For Basic Test. For compatibility verification.
• LedControl-Scroll-FullSpeed
  Full speed scrolling with the LedControl library. For speed comparison.
• MatrixControl-Scroll-FullSpeed
  Full speed scrolling with the MatrixControl library. For speed comparison. It ends in an instant.
• MatrixControl-Scroll-RightToLeft
  Scroll from right to left using the MatrixControl library.
• MatrixControl-Scroll-LeftToRight
  Scroll from left to right using the MatrixControl library.

Normal display

Invert display