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APA102 LED driver for Android Things

This driver supports RGB LED peripherals built on the APA102 SPI protocol.

NOTE: these drivers are not production-ready. They are offered as sample implementations of Android Things user space drivers for common peripherals as part of the Developer Preview release. There is no guarantee of correctness, completeness or robustness.

How to use the driver

Gradle dependency

To use the apa102 driver, simply add the line below to your project's build.gradle, where <version> matches the last version of the driver available on jcenter.

dependencies {
    compile 'com.google.android.things.contrib:driver-apa102:<version>'
}

Sample usage

import com.google.android.things.contrib.driver.apa102.Apa102;

// Access the LED strip:

Apa102 mApa102;

try {
    mApa102 = new Apa102(spiBusName, Apa102.Mode.RGB);
} catch (IOException e) {
    // couldn't configure the device...
}

// Light it up!

int[] colors = new int[] {Color.RED, Color.GREEN, Color.BLUE};
try {
    mApa102.write(colors);
} catch (IOException e) {
    // error setting LEDs
}

// Close the LED strip when finished:

try {
    mApa102.close();
} catch (IOException e) {
    // error closing LED strip
}

License

Copyright 2016 Google Inc.

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.