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65 lines
1.4 KiB
C++
65 lines
1.4 KiB
C++
/*
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* Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* This program and the accompanying materials are made available under the
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* terms of the The MIT License which is available at
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* https://opensource.org/licenses/MIT.
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*
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* SPDX-License-Identifier: MIT
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*/
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#include <iostream>
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#include <signal.h>
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#include <stdint.h>
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#include <stdio.h>
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#include "gas.hpp"
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#include "mq3.hpp"
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int is_running = 0;
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uint16_t buffer[128];
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void
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sig_handler(int signo)
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{
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printf("got signal\n");
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if (signo == SIGINT) {
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is_running = 1;
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}
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}
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//! [Interesting]
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int
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main(int argc, char** argv)
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{
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// Attach gas sensor to A0
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upm::MQ3 sensor(0);
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signal(SIGINT, sig_handler);
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thresholdContext ctx;
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ctx.averageReading = 0;
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ctx.runningAverage = 0;
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ctx.averagedOver = 2;
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// Infinite loop, ends when script is cancelled
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// Repeatedly, take a sample every 2 milliseconds;
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// find the average of 128 samples; and
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// print a running graph of the averages using a resolution of 5
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while (!is_running) {
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int len = sensor.getSampledWindow(2, 128, buffer);
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if (len) {
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int thresh = sensor.findThreshold(&ctx, 30, buffer, len);
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sensor.printGraph(&ctx, 5);
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if (thresh) {
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// do something ....
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}
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}
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}
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std::cout << "exiting application" << std::endl;
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return 0;
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}
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//! [Interesting]
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