/* * Author: Mihai Tudor Panu * Copyright (c) 2016 Intel Corporation. * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /* This example demonstrates how to use one of the ADS1115 ADCs on the * DFRobot Joule Shield with devices that output a small differential * voltage (e.g. geophones, piezoelectric bands or pads, thermocouples). */ import java.io.*; import java.util.concurrent.*; import upm_ads1x15.*; public class Ads1115_Example { static boolean running = true; static int id = 0; // Sample number static String fileName = "./ads1115.data"; // Output filename public static void main(String[] args) throws InterruptedException { // Open the output file FileWriter fw = null; BufferedWriter bw = null; try { fw = new FileWriter(fileName); bw = new BufferedWriter(fw); } catch (IOException e) { System.out.println("Failed to open output file for writing: " + e.toString()); System.exit(1); } // Initialize and configure the ADS1115 for the SM-24 Geophone // There are two ADS1115 chips on the DFRobot Joule Shield on the same I2C bus // - 0x48 gives access to pins A0 - A3 // - 0x49 gives access to pins A4 - A7 ADS1115 ads1115 = new ADS1115(0, (short)0x48); // Put the ADC into differential mode for pins A0 and A1, // the SM-24 Geophone is connected to these pins ads1115.getSample(ADS1X15.ADSMUXMODE.DIFF_0_1); // Set the gain based on expected VIN range to -/+ 2.048 V // Can be adjusted based on application to as low as -/+ 0.256 V, see API // documentation for details ads1115.setGain(ADS1X15.ADSGAIN.GAIN_TWO); // Set the sample rate to 860 samples per second (max) and turn on continuous // sampling ads1115.setSPS(ADS1115.ADSDATARATE.SPS_860); ads1115.setContinuous(true); // Schedule a task to stop logging after 10 seconds Executors.newSingleThreadScheduledExecutor().schedule(new Runnable() { @Override public void run() { running = false; } }, 10, TimeUnit.SECONDS); // Read from sensor and write to file every ms while(running){ try { bw.write(id + " " + String.format("%.7f", ads1115.getLastSample()) + "\n"); } catch (IOException e) { System.out.println("Failed to write sample " + id + " to file: "+ e.toString()); System.exit(1); } id++; Thread.sleep(1); } // Close and exit try { bw.close(); fw.close(); } catch (IOException e) { System.out.println("Failed to close output file cleanly: " + e.toString()); System.exit(1); } System.out.println("Wrote " + id + " samples to file: " + fileName); System.exit(0); } }