Home | History | Annotate | Download | only in c++ 
      1 /*
      2  * Author: Jon Trulson <jtrulson (at) ics.com>
      3  * Copyright (c) 2014 Intel Corporation.
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining
      6  * a copy of this software and associated documentation files (the
      7  * "Software"), to deal in the Software without restriction, including
      8  * without limitation the rights to use, copy, modify, merge, publish,
      9  * distribute, sublicense, and/or sell copies of the Software, and to
     10  * permit persons to whom the Software is furnished to do so, subject to
     11  * the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be
     14  * included in all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     19  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
     20  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     21  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     22  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     23  */
     24 
     25 #include <unistd.h>
     26 #include <iostream>
     27 #include <signal.h>
     28 #include "grovewfs.h"
     29 
     30 using namespace std;
     31 
     32 int shouldRun = true;
     33 
     34 void sig_handler(int signo)
     35 {
     36   if (signo == SIGINT)
     37     shouldRun = false;
     38 }
     39 
     40 
     41 int main()
     42 {
     43   signal(SIGINT, sig_handler);
     44 
     45 //! [Interesting]
     46   // Instantiate a Grove Water Flow Sensor on digital pin D2
     47   upm::GroveWFS* flow = new upm::GroveWFS(2);
     48 
     49   // set the flow counter to 0 and start counting
     50   flow->clearFlowCounter();
     51   flow->startFlowCounter();
     52 
     53   while (shouldRun)
     54     {
     55       // we grab these (,illis and flowCount) just for display
     56       // purposes in this example
     57       uint32_t millis = flow->getMillis();
     58       uint32_t flowCount = flow->flowCounter();
     59 
     60       float fr = flow->flowRate();
     61 
     62       // output milliseconds passed, flow count, and computed flow rate
     63       cout << "Millis: " << millis << " Flow Count: " << flowCount;
     64       cout << " Flow Rate: " << fr << " LPM" << endl;
     65 
     66       // best to gather data for at least one second for reasonable
     67       // results.
     68       sleep(2);
     69     }
     70 
     71   flow->stopFlowCounter();
     72 //! [Interesting]
     73 
     74   cout << "Exiting..." << endl;
     75 
     76   delete flow;
     77   return 0;
     78 }
     79