/*********************************************************************************
 *      Copyright:  (C) 2019 LingYun IoT System Studio
 *                  All rights reserved.
 *
 *       Filename:  relay.c
 *    Description:  This file 
 *                 
 *        Version:  1.0.0(30/01/19)
 *         Author:  Guo Wenxue <guowenxue@gmail.com>
 *      ChangeLog:  1, Release initial version on "30/01/19 08:44:30"
 *                 
 ********************************************************************************/

#include <stdio.h>
#include <unistd.h>
#include <libgen.h>

#include <string.h>

#include <wiringPi.h>
#include "relay.h"

int main (int argc, char **argv)
{
    if( argc != 2 )
    {
        printf("Usage: %s [on/off]\n", basename(argv[0]));
        return -1;
    }

    wiringPiSetup();
    relay_init();

    if( !strstr(argv[1], "on") || !strstr(argv[1], "on") )
    {
        turn_relay(ON);
    }
    else if( !strstr(argv[1], "off") || !strstr(argv[1], "off") )
    {
        turn_relay(OFF);
    }

    return 0;
}

void relay_init(void)
{
    pinMode(RELAY_PIN, OUTPUT);
}


void turn_relay(int cmd)
{
    if( OFF == cmd )
    {
        digitalWrite ( RELAY_PIN, HIGH );
    }
    else
    {
        digitalWrite ( RELAY_PIN, LOW );
    }
}