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Dave Smith
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Add ADC sample for the ADS1015 module.
Change-Id: Ic24e43f1fc41dd3a470837d40575fd3f99559128 Signed-off-by: Dave Smith <smithdave@google.com>
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‎ads1015/.gitignore‎

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/build

‎ads1015/README.md‎

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ADS1015 ADC sample for Android Things
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=====================================
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This Android Things sample demonstrates how to use an ADS1015 ADC module
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with the ADS1xxx contrib driver.
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Pre-requisites
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--------------
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- Android Things compatible board
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- Android Studio 2.2+
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- 1 [ADS1015 ADC module](https://www.adafruit.com/product/1083)
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- jumper wires
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- 1 breadboard
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Schematics
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----------
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![Schematics for Raspberry Pi 3](rpi3_schematics.png)
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Build and install
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=================
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On Android Studio, click on the "Run" button.
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If you prefer to run on the command line, from this repository's root directory, type
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```bash
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./gradlew ads1015:installDebug
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adb shell am start com.example.androidthings.driversamples/.MainActivity
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```
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If you have everything set up correctly, the latest ADC reading will be
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written to logcat.
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License
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-------
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Copyright 2018 The Android Open Source Project, Inc.
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Licensed to the Apache Software Foundation (ASF) under one or more contributor
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license agreements. See the NOTICE file distributed with this work for
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additional information regarding copyright ownership. The ASF licenses this
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file to you under the Apache License, Version 2.0 (the "License"); you may not
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use this file except in compliance with the License. You may obtain a copy of
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the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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License for the specific language governing permissions and limitations under
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the License.

‎ads1015/build.gradle‎

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/*
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* Copyright 2018, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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apply plugin: 'com.android.application'
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android {
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compileSdkVersion 27
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defaultConfig {
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applicationId 'com.example.androidthings.driversamples'
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minSdkVersion 27
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targetSdkVersion 27
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versionCode 1
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versionName "1.0"
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}
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buildTypes {
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release {
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minifyEnabled false
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proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
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}
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}
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}
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dependencies {
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compileOnly 'com.google.android.things:androidthings:1.0'
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implementation 'com.google.android.things.contrib:driver-adc:2.0'
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}

‎ads1015/rpi3_schematics.fzz‎

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‎ads1015/rpi3_schematics.png‎

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‎ads1015/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<!--
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Copyright 2018 The Android Open Source Project
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="com.example.android.things.ads1015">
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<uses-permission android:name="com.google.android.things.permission.USE_PERIPHERAL_IO" />
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<application
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android:label="@string/app_name">
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<uses-library android:name="com.google.android.things" />
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<activity android:name=".MainActivity">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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<!--
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Uncomment the following intent filter block to enable this activity to
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launch automatically on boot, and re-launch if the app terminates.
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-->
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<!--
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<intent-filter>
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<action android:name="android.intent.action.MAIN"/>
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<category android:name="android.intent.category.HOME"/>
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<category android:name="android.intent.category.DEFAULT"/>
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</intent-filter>
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-->
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</activity>
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</application>
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</manifest>

‎ads1015/src/main/java/com/example/android/things/ads1015/BoardDefaults.java‎

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/*
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* Copyright 2018, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.things.ads1015;
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import android.os.Build;
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@SuppressWarnings("WeakerAccess")
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public class BoardDefaults {
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private static final String DEVICE_RPI3 = "rpi3";
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private static final String DEVICE_IMX6UL_PICO = "imx6ul_pico";
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private static final String DEVICE_IMX7D_PICO = "imx7d_pico";
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/**
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* Return the preferred I2C port for each board.
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*/
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public static String getI2CPort() {
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switch (Build.DEVICE) {
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case DEVICE_RPI3:
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return "I2C1";
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case DEVICE_IMX6UL_PICO:
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return "I2C2";
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case DEVICE_IMX7D_PICO:
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return "I2C1";
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default:
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throw new IllegalStateException("Unknown Build.DEVICE " + Build.DEVICE);
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}
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}
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}

‎ads1015/src/main/java/com/example/android/things/ads1015/MainActivity.java‎

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/*
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* Copyright 2018, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.things.ads1015;
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import android.app.Activity;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.HandlerThread;
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import android.util.Log;
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import android.widget.TextView;
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import com.google.android.things.contrib.driver.adc.ads1xxx.Ads1xxx;
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import java.io.IOException;
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/**
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* Sample activity that demonstrates the usage of the
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* Ads1xxx driver with an ADS1015 module.
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*
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* https://www.adafruit.com/product/1083
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*/
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public class MainActivity extends Activity {
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private static final String TAG = MainActivity.class.getSimpleName();
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private static final int DELAY_MS = 100; // 10 samples/second
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private Ads1xxx mAdcDriver;
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private Handler mHandler;
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private HandlerThread mReadThread;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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try {
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Log.d(TAG, "Initializing ADC Driver");
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mAdcDriver = new Ads1xxx(BoardDefaults.getI2CPort(), Ads1xxx.Configuration.ADS1015);
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// Increase default range to fit +3.3V
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mAdcDriver.setInputRange(Ads1xxx.RANGE_4_096V);
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// Set up I/O polling thread
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mReadThread = new HandlerThread("ADC Reader");
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mReadThread.start();
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mHandler = new Handler(mReadThread.getLooper());
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mHandler.post(mReadAction);
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} catch (IOException e) {
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Log.e(TAG, "Failed to initialize ADC driver", e);
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}
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}
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@Override
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protected void onDestroy() {
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super.onDestroy();
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mReadThread.quit();
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try {
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mAdcDriver.close();
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} catch (IOException e) {
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Log.e(TAG, "Failed to close ADC driver", e);
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} finally {
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mAdcDriver = null;
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}
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}
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/* Read a single analog sample and log the result */
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private Runnable mReadAction = new Runnable() {
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@Override
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public void run() {
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try {
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// Read differential between IN0+/IN1-
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final int value = mAdcDriver.readDifferentialInput(Ads1xxx.INPUT_DIFF_0P_1N);
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Log.i(TAG, "Current ADC value: " + value);
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} catch (IOException e) {
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Log.e(TAG, "Unable to read analog sample", e);
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}
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mHandler.postDelayed(this, DELAY_MS);
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}
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};
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}

‎ads1015/src/main/res/values/strings.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<!--
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Copyright 2018 The Android Open Source Project
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<resources>
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<string name="app_name">ADS1015</string>
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</resources>

‎build.gradle‎

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allprojects {
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repositories {
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jcenter()
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google()
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}
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}
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