ECE434 - Final Project: Infinity Mirror

Aidan Moss & Tyler Thenell

Project Overview

For our project, we decided to make a music/audio responsive infinity mirror. This project will serve as a home decoration for audio visualization.

Parts

The Infinity Mirror uses the following parts:

Tools

The Infinity mirror needed the following tools to assemble:

Pinouts

Physical Pinout:

·P9_29 → LED Strip data line

·P9_40 → Microphone Digital Output

Hardware

This image shows how the data lines of the LEDs were connected. Segment 0 represents the first segment in the datapath. Each colored segment array in the diagram is connected in parallel. Each segment is 7 leds long. This means you have a total length of 35 LEDs due to the parallelism. If you turn LED 3 on, the third LED will turn on in Green, Yellow, Grey, Blue, and Orange.

This image shows how the BeagleBone Black is connected to the audio sensor and LED strip. Based on the diagram above, the LED segment below is really 5 parallel LED strips.

Installation

Clone repo located here: https://github.com/mossac/InfMirror

This repo contains all the code needed to run the SK6812 LED strands to begin running the PRU driver simply:

$ cd InfMirror/LEDStatic
$ source setup.sh
$ make

The kernel driver should be active, to test you can run commands in ExampleCommand.sh which will turn the first LED in your strip white if it is running correctly if not follow the commands in section 1.16 of the link below as you may not have the rpmsg.pru driver installed that the kernel driver requires:

https://markayoder.github.io/PRUCookbook/05blocks/blocks.html

Controlling LEDs

After running the PRU kernel driver, you can begin programming or running our example LED control code.

To run any of the sample python programs from the repo simply use the command

$ ./filename.py

Listed below is a quick rundown of what you can expect from the different sample programs

neo-colors.py: Shifts the LEDs slowly through 4 different vibrant colors
neo-rainbow.py: Runs all the colors of the rainbow through the each induvial LED quickly
neo-gpio.py: Same as neo-colors.py but has integrated a microphone input that flashes the LEDs red when a adequate input is detected
neo-gpioFlip.py: Top half of the hardware is white middle strip is purple and bottom few are blue flips when a adequate microphone input is detected
simplemic.py: Testing program we used, checks from microphone input of certain level and flashes two colors if found

We recommend checking out these files and reading the section below, we tried to make them easy to understand and hope that others can build on them to create even more unique shows.

MaBecker/InfMirror