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77be6adf6d
Additionally, add some error checking in the constructor, and determine the ADC resolution and use that in the voltage calculation rather than a hardcoded 1024.0. Signed-off-by: Jon Trulson <jtrulson@ics.com> Signed-off-by: Zion Orent <zorent@ics.com> Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <unistd.h>
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#include <iostream>
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#include <signal.h>
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#include "gp2y0a.h"
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using namespace std;
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bool shouldRun = true;
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// analog voltage, usually 3.3 or 5.0
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#define GP2Y0A_AREF 5.0
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#define SAMPLES_PER_QUERY 20
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void sig_handler(int signo)
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{
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if (signo == SIGINT)
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shouldRun = false;
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}
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int main()
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{
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signal(SIGINT, sig_handler);
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//! [Interesting]
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// Note, for the Grove 80cm version of this sensor, due to the way
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// it is wired, you need to plug this into the A0 port, where it
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// will use the available A1 pin for data.
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// Instantiate a GP2Y0A on analog pin A1
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upm::GP2Y0A *volts = new upm::GP2Y0A(1);
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// The higher the voltage (closer to AREF) the closer the object is. NOTE:
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// the measured voltage will probably not exceed 3.3 volts.
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// Every second, print the averaged voltage value (averaged over 20 samples).
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while (shouldRun)
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{
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cout << "AREF: " << GP2Y0A_AREF
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<< ", Voltage value (higher means closer): "
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<< volts->value(GP2Y0A_AREF, SAMPLES_PER_QUERY) << endl;
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sleep(1);
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}
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//! [Interesting]
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cout << "Exiting" << endl;
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delete volts;
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return 0;
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}
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