upm/examples/c++/a110x-intr.cxx
Mihai Tudor Panu 89d5de43e0 license: update to SPDX style license text throughout
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
2020-03-05 15:13:36 -08:00

67 lines
1.3 KiB
C++

/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2015 Intel Corporation.
*
* This program and the accompanying materials are made available under the
* terms of the The MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
*/
#include <iostream>
#include <signal.h>
#include <stddef.h>
#include "a110x.hpp"
#include "upm_utilities.h"
using namespace std;
int shouldRun = true;
void
sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
}
// Our pulse counter
volatile unsigned int counter = 0;
// Our interrupt handler
void
hallISR(void* arg)
{
counter++;
}
int
main()
{
signal(SIGINT, sig_handler);
//! [Interesting]
// Instantiate an A110X sensor on digital pin D2
upm::A110X hall(2);
// This example uses a user-supplied interrupt handler to count
// pulses that occur when a magnetic field of the correct polarity
// is detected. This could be used to measure the rotations per
// minute (RPM) of a rotor for example.
hall.installISR(hallISR, NULL);
while (shouldRun) {
cout << "Pulses detected: " << counter << endl;
upm_delay(1);
}
//! [Interesting]
cout << "Exiting..." << endl;
return 0;
}