/*********************************************************************************
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* Copyright: (C) 2019 LingYun IoT System Studio
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* All rights reserved.
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*
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* Filename: relay.c
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* Description: This file
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*
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* Version: 1.0.0(30/01/19)
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* Author: Guo Wenxue <guowenxue@gmail.com>
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* ChangeLog: 1, Release initial version on "30/01/19 08:44:30"
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*
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********************************************************************************/
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#include <stdio.h>
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#include <unistd.h>
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#include <libgen.h>
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#include <string.h>
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#include <gpiod.h>
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#define ON 1
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#define OFF 0
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/* Relay #Pin(29) BCM(5) */
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#define relay_pin 5
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int turn_relay(int cmd);
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int main (int argc, char **argv)
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{
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if( argc != 2 )
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{
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printf("Usage: %s [on/off]\n", basename(argv[0]));
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return -1;
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}
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if( !strstr(argv[1], "on") || !strstr(argv[1], "on") )
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{
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turn_relay(ON);
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}
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else if( !strstr(argv[1], "off") || !strstr(argv[1], "off") )
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{
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turn_relay(OFF);
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}
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return 0;
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}
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static void gpiod_ctxless_cb(void *data)
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{
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sleep(3);
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}
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int turn_relay(int cmd)
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{
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if( OFF == cmd )
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gpiod_ctxless_set_value("gpiochip0", relay_pin, 0, false, "relay", gpiod_ctxless_cb, NULL);
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else
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gpiod_ctxless_set_value("gpiochip0", relay_pin, 1, false, "relay", gpiod_ctxless_cb, NULL);
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}
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