/*********************************************************************************
 *      Copyright:  (C) 2024 LingYun IoT System Studio
 *                  All rights reserved.
 *
 *       Filename:  led.h
 *    Description:  This file is used to control RGB 3-colors LED
 *
 ********************************************************************************/

#ifndef  _LED_H_
#define  _LED_H_

#include "gpiod.h"

#define DELAY     300

#define ON        1
#define OFF       0

/* Three LEDs number */
enum
{
    LED_R = 0,
    LED_G,
    LED_B,
    LED_CNT,
};

enum
{
    ACTIVE_HIGH, /* High level will turn led on */
    ACTIVE_LOW,  /* Low level will turn led on */
};

/* Three LEDs hardware information */
typedef struct led_s
{
    const char               *name;      /* RGB 3-color LED name  */
    int                       chip_num;  /* RGB 3-color LED connect chip */
    int                       gpio_num;  /* RGB 3-color LED connect line */
    int                       active;    /* RGB 3-color LED active level */
    int                       status;    /* RGB 3-color LED current status */
    struct gpiod_line_request *request;  /* libgpiod gpio request handler */
} led_t;

/* Three LEDs structure */
typedef struct leds_s
{
    led_t               *leds;  /* led pointer to leds_info */
    int                  count; /* led count */
} leds_t;


/* initial leds */
int init_led(void);

/* terminate leds   */
int term_led(void);

/* turn $which led ON/OFF */
int turn_led(int which, int cmd);

/* toggle $which led status */
int toggle_led(int which);

/* blink $which led status with $interval ms */
void blink_led(int which, int interval);

#endif