upm/examples/java/Ads1115_Example.java

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/*
* Author: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
* 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);
}
}