README.md

Ws28xx LED drivers

This binding allows you to update the RGB LEDs on Ws28xx and based strips and matrices.

To see how to use the binding in code, see the sample.

Documentation

• WS2812B: Datasheet
• WS2808: Datasheet
• Neo pixels guide
• Neo pixels x8 stick

Board

Neo pixels

WS2808

Usage

using System;
using System.Collections.Generic;
using System.Device.Spi;
using System.Drawing;
using Iot.Device.Graphics;
using Iot.Device.Ws28xx;

// Configure the count of pixels
const int Count = 8;
Console.Clear();

SpiConnectionSettings settings = new(0, 0)
{
    ClockFrequency = 2_400_000,
    Mode = SpiMode.Mode0,
    DataBitLength = 8
};
using SpiDevice spi = SpiDevice.Create(settings);

Ws28xx neo = new Ws2808(spi, count);
//Ws28xx neo = new Ws2812b(spi, Count);

while (true)
{
    Rainbow(neo, Count);
    System.Threading.Thread.Sleep(100);
}

void Rainbow(Ws28xx neo, int count, int iterations = 1)
{
    BitmapImage img = neo.Image;
    for (var i = 0; i < 255 * iterations; i++)
    {
        for (var j = 0; j < count; j++)
        {
            img.SetPixel(j, 0, Wheel((i + j) & 255));
        }

        neo.Update();
    }
}

Binding Notes

Raspberry Pi setup (/boot/config.txt)

• Make sure spi is enabled

dtparam=spi=on

• Make sure SPI don't change speed fix the core clock:

core_freq=250
core_freq_min=250