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/*
* Author: Sarah Knepper <sarah.knepper@intel.com>
* Copyright (c) 2014 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 <iomanip>
#include <cmath>
#include "ldt0028.h"
int
main(int argc, char **argv)
{
//! [Interesting]
const int NUMBER_OF_SECONDS = 10;
const int MICROSECONDS_PER_SECOND = 1000000;
const int SAMPLES_PER_SECOND = 50;
const int THRESHOLD = 100;
// Create the LDT0-028 Piezo Vibration Sensor object using AIO pin 0
upm::LDT0028* sensor = new upm::LDT0028(0);
// Read the signal every 20 milliseconds for 10 seconds
std::cout << "For the next " << NUMBER_OF_SECONDS << " seconds, "
<< SAMPLES_PER_SECOND << " samples will be taken every second."
<< std::endl << std::endl;
uint16_t* buffer = new uint16_t[NUMBER_OF_SECONDS * SAMPLES_PER_SECOND];
for (int i=0; i < NUMBER_OF_SECONDS * SAMPLES_PER_SECOND; i++) {
buffer[i] = (uint16_t) sensor->getSample();
usleep(MICROSECONDS_PER_SECOND / SAMPLES_PER_SECOND);
}
// Print the number of times the reading was greater than the threshold
int count = 0;
for (int i=0; i < NUMBER_OF_SECONDS * SAMPLES_PER_SECOND; i++) {
if (buffer[i] > THRESHOLD) {
count++;
}
}
std::cout << sensor->name() << " exceeded the threshold value of " <<
THRESHOLD << " a total of " << count << " times," << std::endl
<< "out of a total of " << NUMBER_OF_SECONDS*SAMPLES_PER_SECOND
<< " readings." << std::endl << std::endl;
// Print a graphical representation of the average value sampled
// each second for the past 10 seconds, using a scale factor of 15
std::cout << "Now printing a graphical representation of the average reading "
<< std::endl << "each second for the last "
<< NUMBER_OF_SECONDS << " seconds." << std::endl;
const int SCALE_FACTOR = 15;
for (int i=0; i < NUMBER_OF_SECONDS; i++) {
long sum = 0;
for (int j=0; j < SAMPLES_PER_SECOND; j++) {
sum += buffer[i*SAMPLES_PER_SECOND + j];
}
double average = (double) sum / (double) SAMPLES_PER_SECOND;
int stars_to_print = (int) round(average / SCALE_FACTOR);
std::cout << "(" << std::setw(4) << (int) round(average) << ") | ";
for (int j=0; j<stars_to_print; j++) {
std::cout << "*";
}
std::cout << std::endl;
}
// Delete the sensor object
delete sensor;
//! [Interesting]
return 0;
}
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