/*********************************************************************************
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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: infrared.c
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* Description: This file
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*
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* pi@raspberrypi:~ $ gpio readall #show BCM and wPi pinmap
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*
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* PIN #PIN BCM wPi
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* VCC(left) ---- 2 ---- 5v ---- 5v
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* I/O(indoor) ---- 16 ---- 23 ---- 4
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* I/O(hallway) ---- 18 ---- 24 ---- 5
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* GND(right) ---- 34 ---- 0v ---- 0v
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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 03:37:16"
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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 <errno.h>
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#include <stdlib.h>
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#include <string.h>
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//#define CONFIG_USE_WIRINGPI
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#ifdef CONFIG_USE_WIRINGPI
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#include <wiringPi.h>
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int main (int argc, char **argv)
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{
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int wPiPin;
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if( argc != 2 )
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{
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printf("%s [wPi PinNum]\n", argv[0]);
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printf("Exampe indoor : %s 4\n", argv[0]);
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printf("Exampe hallway: %s 5\n", argv[0]);
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return 0;
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}
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wPiPin = atoi(argv[1]);
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printf("Start infrared detect on wPi Pin[#%d]\n", wPiPin);
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wiringPiSetup();
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pinMode(wPiPin, INPUT);
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while(1)
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{
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printf("Infrared monitor: %s\n", digitalRead(wPiPin)? "Someone is closing!":"No one nearby!");
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sleep(1);
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}
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return 0;
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}
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#else
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#include <gpiod.h>
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int main (int argc, char **argv)
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{
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struct gpiod_chip* chip;
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struct gpiod_line* line;
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int rv = 0;
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struct gpiod_line_event event;
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int bcmPin;
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if( argc != 2 )
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{
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printf("%s [BCM PinNum]\n", argv[0]);
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printf("Exampe indoor : %s 23\n", argv[0]);
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printf("Exampe hallway: %s 24\n", argv[0]);
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return 0;
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}
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bcmPin = atoi(argv[1]);
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printf("Start infrared detect on BCM Pin[#%d]\n", bcmPin);
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chip = gpiod_chip_open_by_name("gpiochip0");
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if( !chip )
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{
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printf("gpiod open chip failure, maybe you need running as root\n");
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return 1;
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}
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line = gpiod_chip_get_line(chip, bcmPin);
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if( !line )
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{
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printf("gpiod get line[%d] failure\n", bcmPin);
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rv = 2;
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goto cleanup;
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}
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if( gpiod_line_request_input(line, "infrared") < 0 )
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{
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printf("gpiod request input [#%d] failure: %s\n", bcmPin, strerror(errno) );
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rv = 3;
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goto cleanup;
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}
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while(1)
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{
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/* This function will block, must call it to setup */
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printf("Infrared monitor: %s\n", gpiod_line_get_value(line) ? "Someone is closing!":"No one nearby!");
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sleep(1);
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}
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cleanup:
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gpiod_chip_close(chip);
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return rv;
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}
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#endif
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