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/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2015 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.
*/
#include <unistd.h>
#include <iostream>
#include "mq8.h"
#include <signal.h>
#include <stdlib.h>
#include <sys/time.h>
bool shouldRun = true;
using namespace std;
void
sig_handler(int signo)
{
if (signo == SIGINT)
{
shouldRun = false;
}
}
//! [Interesting]
int main(int argc, char **argv)
{
// Attach gas sensor to Analog A0
upm::MQ8 *sensor = new upm::MQ8(0);
signal(SIGINT, sig_handler);
uint16_t buffer [128];
thresholdContext ctx;
ctx.averageReading = 0;
ctx.runningAverage = 0;
ctx.averagedOver = 2;
// Infinite loop, ends when script is cancelled
// Repeatedly, take a sample every 2 microseconds;
// find the average of 128 samples; and
// print a running graph of asteriskss as averages
while (shouldRun)
{
int len = sensor->getSampledWindow (2, 128, buffer);
if (len) {
int thresh = sensor->findThreshold (&ctx, 30, buffer, len);
sensor->printGraph(&ctx, 5);
if (thresh) {
// do something ....
}
}
}
cout << "Exiting" << endl;
delete sensor;
return 0;
}
//! [Interesting]
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