upm/examples/c++/ads1x15-ads1115.cxx
Noel Eck 96b219d2fb examples: Added 'Interesting' tag to examples
* Added //! [Interesting] tag to all examples which were missing this
* Removed windows CR/LF
* Removed pointers from examples since these are not needed.  Removed
  try/catch which seems to be there only to handle failing pointers and
  return value from main.
* Reformatted examples when the formatting was wonky/inconstant.

Signed-off-by: Noel Eck <noel.eck@intel.com>
2017-04-05 15:16:20 -07:00

108 lines
3.5 KiB
C++

/*
* 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).
*/
#include <fstream>
#include <string>
#include <thread>
#include <unistd.h>
#include "ads1115.hpp"
using namespace std;
using namespace upm;
bool running = true; // Controls main read/write loop
// Thread function
void stop()
{
sleep(10);
running = false;
}
int main()
{
//! [Interesting]
long id = 0; // Sample number
string fileName = "./ads1115.data"; // Output filename
ofstream f;
// 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 upm::ADS1115(0, 0x48);
// Put the ADC into differential mode for pins A0 and A1,
// the SM-24 Geophone is connected to these pins
ads1115->getSample(ADS1X15::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::GAIN_TWO);
// Set the sample rate to 860 samples per second (max) and turn on continuous
// sampling
ads1115->setSPS(ADS1115::SPS_860);
ads1115->setContinuous(true);
// Enable exceptions from the output stream
f.exceptions(ofstream::failbit | ofstream::badbit);
// Open the file
try{
f.open(fileName);
// Output formatting
f.setf(ios_base::fixed);
f.precision(7);
// Start the thread that will stop logging after 10 seconds
thread timer (stop);
// Read sensor data and write it to the output file every ms
while(running){
f << id++ << " " << ads1115->getLastSample() << endl;
usleep(1000);
}
// Clean-up and exit
timer.join();
f.close();
delete ads1115;
} catch (ios_base::failure &e) {
cout << "Failed to write to file: " << e.what() << endl;
return 1;
}
cout << "Wrote " << id << " samples to file: " << fileName << endl;
//! [Interesting]
return 0;
}