ws2811ext

Go-WS281x-RPi

Library written in Go to allow controlling of the WS281x LED strips on a Raspberry Pi.

Usage

This needs quite a few steps, so try keep up!

First, grab the C library

1. sudo apt-get update (update RPi's software)

2. sudo apt-get install scons gcc git (get needed packages)

3. We need to disable the audio, due to PCM

   sudo nano /etc/modprobe.d/snd-blacklist.conf

   and add this into file

   blacklist snd_bcm2835

4. We need to edit configuration of RPi

   sudo nano /boot/config.txt

   and then add a # in front of

   dtparam=audio=on

   to comment it out.

   For headless, you may also need to add the following two line to config.txt

   hdmi_force_hotplug=1 hdmi_force_edid_audio=1

5. sudo reboot

6. go get github.com/rpi-ws281x/rpi-ws281x-go so that the go/src/github.com directory is created.

   => An error will likely occur if https://github.com/jgarff/rpi_ws281x is not installed.

7. browse to go/src/github.com and then create the jgarff directory with mkdir jgarff if it doesn't exist.

8. browse to go/src/github.com/jgarff and type git clone https://github.com/jgarff/rpi_ws281x (the C library that drives the LEDs)

9. browse to go/src/github.com/jgarff/rpi_ws281x github repo and type scons to compile library

10. copy *.h files to /usr/local/include

    sudo cp *.h /usr/local/include

11. copy *.a files to /usr/local/lib

    sudo cp *.a /usr/local/lib

12. go get github.com/rpi-ws281x/rpi-ws281x-go go get github.com/adrianh-za/go-ws281x-rpi go get github.com/adrianh-za/go-utils/colorsys

13. browse to $/go/src/github.com/adrianh-za/go-ws281x-rpi/examples

14. sudo -E go run [filename].go (check filenames below)

15. ctrl-c to quit

Some extra help

Connect and Control WS2812 RGB LED Strips via Raspberry Pi

Example filenames

** The filename contains the LED matrix size

• clear-8x4.go
• clear-8x8.go
• colours-8x4.go
• colours-8x8.go
• happy-8x8.go
• heart-8x8.go
• hw.go
• kitt-8x4.go
• kitt-8x8.go
• rainbow-8x4.go
• rainbow-8x8.go
• rainbow-snake-8x4.go
• rainbow-snake-8x8.go

Acknowledgements

Utilises the WS281x library written by Jeremy Garff

Borrows heavily from the work done by Jacques Supcik

Gits

https://github.com/jgarff/rpi_ws281x

https://github.com/rpi-ws281x/rpi-ws281x-go