/*********************************************************************************
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* Copyright: (C) 2024 LingYun IoT System Studio
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* All rights reserved.
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*
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* Filename: infrared.h
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* Description: This file is HC-SR501 infrared sensor code
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*
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* Pin connection:
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* HC-SR501 Module IGKBoard-IMX6ULL
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* VCC <-----> 5V
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* I/O <-----> #Pin37(GPIO5_IO09)
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* GND <-----> GND
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*
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********************************************************************************/
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#ifndef _INFRARED_H_
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#define _INFRARED_H_
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#include "gpiod.h"
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/* infrared number */
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enum
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{
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IR1 = 0,
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IR_CNT,
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};
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enum
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{
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IR_ACTIVE_LOW, /* Low level active */
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IR_ACTIVE_HIGH, /* High level active */
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};
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/* infrared hardware information */
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typedef struct infrared_s
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{
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const char *name; /* infrared name */
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int chip_num; /* infrared connect chip */
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int gpio_num; /* infrared connect line */
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int active; /* infrared active level */
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struct gpiod_line_request *request; /* libgpiod gpio request handler */
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} infrared_t;
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/* infrared structure */
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typedef struct infrareds_s
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{
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infrared_t *infrareds;/* infrared pointer to infrareds_info */
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int count; /* infrared count */
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} infrareds_t;
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/* initial infrareds */
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int init_infrared(void);
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/* terminate infrareds */
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int term_infrared(void);
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/* detect infrareds */
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int detect_infrared(int which);
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#endif
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