/****************************************************************************
 *
 *   Copyright (c) 2020 PX4 Development Team. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name PX4 nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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/**
 * @file led.c
 *
 * LED backend.
 */

#include <px4_platform_common/px4_config.h>

#include <stdbool.h>

#include "chip.h"
#include "stm32_gpio.h"
#include "board_config.h"

#include <nuttx/board.h>
#include <arch/board/board.h>

/*
 * Ideally we'd be able to get these from arm_internal.h,
 * but since we want to be able to disable the NuttX use
 * of leds for system indication at will and there is no
 * separate switch, we need to build independent of the
 * CONFIG_ARCH_LEDS configuration switch.
 */
__BEGIN_DECLS
extern void led_init(void);
extern void led_on(int led);
extern void led_off(int led);
extern void led_toggle(int led);
__END_DECLS

static uint32_t g_ledmap[] = {
	GPIO_nLED_BLUE,                     // Indexed by LED_BLUE
	GPIO_nLED_RED,                      // Indexed by LED_RED
	GPIO_nLED_GREEN,                    // Indexed by LED_GREEN
};

__EXPORT void led_init(void)
{
	for (size_t l = 0; l < (sizeof(g_ledmap) / sizeof(g_ledmap[0])); l++) {
		if (g_ledmap[l] != 0) {
			stm32_configgpio(g_ledmap[l]);
		}
	}
}

static void phy_set_led(int led, bool state)
{
	/* Drive Low to switch on */
	if (g_ledmap[led] != 0) {
		stm32_gpiowrite(g_ledmap[led], !state);
	}
}

static bool phy_get_led(int led)
{
	/* If Low it is on */
	if (g_ledmap[led] != 0) {
		return !stm32_gpioread(g_ledmap[led]);
	}

	return false;
}

__EXPORT void led_on(int led)
{
	phy_set_led(led, true);
}

__EXPORT void led_off(int led)
{
	phy_set_led(led, false);
}

__EXPORT void led_toggle(int led)
{
	phy_set_led(led, !phy_get_led(led));
}