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/*
 * The Clear BSD License
 * Copyright (c) 2015, Freescale Semiconductor, Inc.
 * Copyright 2016-2017 NXP
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted (subject to the limitations in the disclaimer below) provided
 * that the following conditions are met:
 *
 * o Redistributions of source code must retain the above copyright notice, this list
 *   of conditions and the following disclaimer.
 *
 * o 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.
 *
 * o Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE.
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "fsl_debug_console.h"
#include "fsl_port.h"
#include "fsl_gpio.h"
#include "fsl_common.h"
#include "board.h"
#include "pin_mux.h"
#include "clock_config.h"
/*******************************************************************************
 * Definitions
 ******************************************************************************/
#define BOARD_LED_GPIO BOARD_LED_RED_GPIO
#define BOARD_LED_GPIO_PIN BOARD_LED_RED_GPIO_PIN

#define BOARD_SW_GPIO BOARD_SW3_GPIO
#define BOARD_SW_PORT BOARD_SW3_PORT
#define BOARD_SW_GPIO_PIN BOARD_SW3_GPIO_PIN
#define BOARD_SW_IRQ BOARD_SW3_IRQ
#define BOARD_SW_IRQ_HANDLER BOARD_SW3_IRQ_HANDLER
#define BOARD_SW_NAME BOARD_SW3_NAME

/*******************************************************************************
 * Prototypes
 ******************************************************************************/

/*******************************************************************************
 * Variables
 ******************************************************************************/
/* Whether the SW button is pressed */
volatile bool g_ButtonPress = false;

/*******************************************************************************
 * Code
 ******************************************************************************/
/*!
 * @brief Interrupt service fuction of switch.
 *
 * This function toggles the LED
 */
void BOARD_SW_IRQ_HANDLER(void)
{
    /* Clear external interrupt flag. */
    GPIO_PortClearInterruptFlags(BOARD_SW_GPIO, 1U << BOARD_SW_GPIO_PIN);
    /* Change state of button. */
    g_ButtonPress = true;
    /* Add for ARM errata 838869, affects Cortex-M4, Cortex-M4F Store immediate overlapping
      exception return operation might vector to incorrect interrupt */
#if defined __CORTEX_M && (__CORTEX_M == 4U)
    __DSB();
#endif
}

/*!
 * @brief Main function
 */
int main(void)
{
    /* Define the init structure for the input switch pin */
    gpio_pin_config_t sw_config = {
        kGPIO_DigitalInput, 0,
    };

    /* Define the init structure for the output LED pin */
    gpio_pin_config_t led_config = {
        kGPIO_DigitalOutput, 0,
    };

    BOARD_InitPins();
    BOARD_BootClockRUN();
    BOARD_InitDebugConsole();

    /* Print a note to terminal. */
    PRINTF("\r\n GPIO Driver example\r\n");
    PRINTF("\r\n Press %s to turn on/off a LED \r\n", BOARD_SW_NAME);

    /* Init input switch GPIO. */
    PORT_SetPinInterruptConfig(BOARD_SW_PORT, BOARD_SW_GPIO_PIN, kPORT_InterruptFallingEdge);
    EnableIRQ(BOARD_SW_IRQ);
    GPIO_PinInit(BOARD_SW_GPIO, BOARD_SW_GPIO_PIN, &sw_config);

    /* Init output LED GPIO. */
    GPIO_PinInit(BOARD_LED_GPIO, BOARD_LED_GPIO_PIN, &led_config);

    while (1)
    {
        if (g_ButtonPress)
        {
            PRINTF(" %s is pressed \r\n", BOARD_SW_NAME);
            /* Toggle LED. */
            GPIO_PortToggle(BOARD_LED_GPIO, 1U << BOARD_LED_GPIO_PIN);
            /* Reset state of button. */
            g_ButtonPress = false;
        }
    }
}