Firmware for a stock ticker that displays the prices of stocks on a long line of MAX7219 LED matrices with a Pico 2W from Alpaca Markets! This repository documents the creation of a 3x3x12 LED matrix ...

Each segment of the display requires 16 bits and can all be shifted in at once. To make transfers faster we use hardware SPI instead of software. The pins are therefore fixed: MOSI is connected to DIN ...