/*********************************************************************************
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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: led.h
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* Description: This file is used to control RGB 3-colors LED
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*
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*
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* Pin connection:
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* RGB Led Module IGKBoard-IMX6ULL
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* R <-----> #Pin36 (GPIO1_IO11)
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* G <-----> #Pin38 (GPIO1_IO10)
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* B <-----> #Pin40 (GPIO5_IO09)
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* GND <-----> GND
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*
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********************************************************************************/
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#ifndef _LED_H_
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#define _LED_H_
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#include "gpiod.h"
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#define DELAY 300
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#define ON 1
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#define OFF 0
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/* Three LEDs number */
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enum
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{
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LED_R = 0,
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LED_G,
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LED_B,
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LED_CNT,
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};
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enum
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{
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ACTIVE_HIGH, /* High level will turn led on */
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ACTIVE_LOW, /* Low level will turn led on */
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};
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/* Three LEDs hardware information */
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typedef struct led_s
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{
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const char *name; /* RGB 3-color LED name */
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int chip_num; /* RGB 3-color LED connect chip */
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int gpio_num; /* RGB 3-color LED connect line */
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int active; /* RGB 3-color LED active level */
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int status; /* RGB 3-color LED current status */
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struct gpiod_line_request *request; /* libgpiod gpio request handler */
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} led_t;
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/* Three LEDs structure */
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typedef struct leds_s
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{
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led_t *leds; /* led pointer to leds_info */
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int count; /* led count */
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} leds_t;
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/* initial leds */
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int init_led(void);
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/* terminate leds */
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int term_led(void);
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/* turn $which led ON/OFF */
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int turn_led(int which, int cmd);
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/* toggle $which led status */
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int toggle_led(int which);
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/* blink $which led status with $interval ms */
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void blink_led(int which, int interval);
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#endif
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