Scrolling Text On LED Matrices with an AVR MCU

The 8×8 LED matrix is a fun place to begin learning about how to control LEDs in a way that expresses something meaningful. You can create static images such as smiley faces, sprites, characters, and with some coding magic even create scrolling text and animations.

In this posting I will detail how to control 8×8 LED matrices with the MAX7219 Driver chip to create a cascaded scrolling text display. I will be using an AVR ATmega328P Microcontroller programed in C with the avr-gcc compiler.

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