/****************************************************************************
*
*   Copyright (c) 2006 Dave Hylands     <dhylands@gmail.com>
*
*   This program is free software; you can redistribute it and/or modify
*   it under the terms of the GNU General Public License version 2 as
*   published by the Free Software Foundation.
*
*   Alternatively, this software may be distributed under the terms of BSD
*   license.
*
*   See README and COPYING for more details.
*
****************************************************************************
*
*   User mode app which monitors multiple gpio pins and notifies a user mode
*   app about the events.
*
****************************************************************************/

/* ---- Include Files ---------------------------------------------------- */

#include <stdio.h>
#include <stdlib.h>

#include "gpio-event-drv.h"

/* ---- Public Variables ------------------------------------------------- */

/* ---- Private Constants and Types -------------------------------------- */
/* ---- Private Variables ------------------------------------------------ */
/* ---- Private Function Prototypes -------------------------------------- */
/* ---- Functions -------------------------------------------------------- */

/****************************************************************************
*
*  main
*
***************************************************************************/

int main( int argc, char **argv )
{
    FILE                   *fs;
    GPIO_EventMonitor_t     monitor;

    if (( fs = fopen( "/dev/gpio-event", "r" )) < 0 )
    {
        perror( "Unable to open /dev/gpio-event" );
        exit( 1 );
    }

    ioctl( fileno( fs ), GPIO_EVENT_IOCTL_SET_READ_MODE, 1 );

    monitor.onOff = 1;
    monitor.gpio  = 58;
    monitor.edgeType = GPIO_EventRisingEdge;
    monitor.debounceMilliSec = 20;

    if ( ioctl( fileno( fs ), GPIO_EVENT_IOCTL_MONITOR_GPIO, &monitor ) != 0 )
    {
        perror( "ioctl GPIO_EVENT_IOCTL_MONITOR_GPIO failed" );
        exit( 1 );
    }

    while ( 1 )
    {
        GPIO_Event_t    gpioEvent;
        int             numBytes;

        if (( numBytes = fread( &gpioEvent, 1, sizeof( gpioEvent ), fs )) == sizeof( gpioEvent ))
        {
            printf( "GPIO pressed\n" );
        }
        else
        {
            if ( numBytes > 0 )
            {
                fprintf( stderr, "Read unexpected number of bytes: %d, expecting %d\n",
                         numBytes, sizeof( gpioEvent ));
            }
        }
    }

    fclose( fs );

    exit( 0 );
    return 0;

} // main