1765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang/* 2765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * Author: Jon Trulson <jtrulson@ics.com> 3765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * Copyright (c) 2015 Intel Corporation. 4765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * 5765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * Permission is hereby granted, free of charge, to any person obtaining 6765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * a copy of this software and associated documentation files (the 7765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * "Software"), to deal in the Software without restriction, including 8765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * without limitation the rights to use, copy, modify, merge, publish, 9765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * distribute, sublicense, and/or sell copies of the Software, and to 10765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * permit persons to whom the Software is furnished to do so, subject to 11765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * the following conditions: 12765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * 13765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * The above copyright notice and this permission notice shall be 14765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * included in all copies or substantial portions of the Software. 15765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * 16765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 20765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang */ 24765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 25765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang#include <unistd.h> 26765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang#include <iostream> 27765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang#include "mq6.h" 28765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang#include <signal.h> 29765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang#include <stdlib.h> 30765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang#include <sys/time.h> 31765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 32765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangbool shouldRun = true; 33765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 34765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangusing namespace std; 35765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 36765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangvoid 37765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangsig_handler(int signo) 38765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang{ 39765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang if (signo == SIGINT) 40765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang { 41765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang shouldRun = false; 42765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang } 43765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang} 44765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 45765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang//! [Interesting] 46765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangint main(int argc, char **argv) 47765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang{ 48765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang // Attach gas sensor to Analog A0 49765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang upm::MQ6 *sensor = new upm::MQ6(0); 50765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang signal(SIGINT, sig_handler); 51765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 52765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang uint16_t buffer [128]; 53765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 54765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang thresholdContext ctx; 55765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang ctx.averageReading = 0; 56765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang ctx.runningAverage = 0; 57765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang ctx.averagedOver = 2; 58765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 59765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang // Infinite loop, ends when script is cancelled 60765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang // Repeatedly, take a sample every 2 microseconds; 61765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang // find the average of 128 samples; and 62765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang // print a running graph of asteriskss as averages 63765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang while (shouldRun) 64765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang { 65765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang int len = sensor->getSampledWindow (2, 128, buffer); 66765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang if (len) { 67765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang int thresh = sensor->findThreshold (&ctx, 30, buffer, len); 68765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang sensor->printGraph(&ctx, 5); 69765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang if (thresh) { 70765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang // do something .... 71765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang } 72765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang } 73765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang } 74765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 75765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang cout << "Exiting" << endl; 76765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 77765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang delete sensor; 78765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 79765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang return 0; 80765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang} 81765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang//! 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