Program for testing a PIR module on the Intel Edison

MotionDetectorTest.cpp

/*
 * Author: Clark Scheff <clark@scheffsblend.com>
 * Copyright (c) 2015 Scheff's Blend
 *
 * 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 "jhd1313m1.h"
#include "buzzer.h"
#include "mraa.hpp"
#include <pthread.h>
#include <signal.h>
#include <unistd.h>

upm::Buzzer *g_buzzer = NULL;
upm::Jhd1313m1 *g_lcd = NULL;
mraa::Gpio *g_motionSensor = NULL;

bool g_motionDetected = false;

void* alarm(void* args) {
    while (g_motionDetected) {
        g_buzzer->playSound(LA, 125000);
        g_buzzer->playSound(SI, 125000);
    }
    g_buzzer->playSound(FA, 0);

    return NULL;
}

void motionInterrupt(void* args) {
    pthread_t tid;
    int sensorValue = g_motionSensor->read();
    if (sensorValue && !g_motionDetected) {
        g_motionDetected = true;
        g_lcd->setColor(255, 0, 0);
        pthread_create(&tid, NULL, &alarm, NULL);
    } else if (!sensorValue) {
        g_motionDetected = false;
        g_lcd->setColor(0, 0, 255);
    }
}

void shutdown(int signo) {
    delete g_buzzer;
    delete g_motionSensor;
    delete g_lcd;

    exit(0);
}

int main(int argc, char **argv) {
    // Setup motion sensor on GPIO 4 and configure the pin to interrupt
    // on both the rising and falling edge
    g_motionSensor = new mraa::Gpio(4, true, false);
    g_motionSensor->dir(mraa::DIR_IN);
    g_motionSensor->isr(mraa::EDGE_BOTH, &motionInterrupt, NULL);

    // Buzzer uses PWM so make sure this is on a pin that suports PWM
    // and don't forget to check that damn PWM swizzler shiznit.
    g_buzzer = new upm::Buzzer(3);

    // 0x62 RGB_ADDRESS, 0x3E LCD_ADDRESS
    g_lcd = new upm::Jhd1313m1(0, 0x3E, 0x62);
    g_lcd->setColor(0, 0, 255);
    g_lcd->setCursor(0, 0);
    g_lcd->write("Motion detector");

    // clean things up nicely if the process is terminated or interrupted
    signal(SIGINT, shutdown);
    signal(SIGTERM, shutdown);

    while (true) {
        sleep(1);
    }
}