/*
 * Copyright (c) 2015, Freescale Semiconductor, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted 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 Freescale Semiconductor, Inc. nor the names of its
 *   contributors may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * 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.
 */

/* FreeRTOS includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "timers.h"
#include "semphr.h"

/* Freescale includes. */
#include "fsl_device_registers.h"
#include "fsl_debug_console.h"
#include "board.h"

#include "pin_mux.h"
/*******************************************************************************
 * Definitions
 ******************************************************************************/

#define TASK_PRIO (configMAX_PRIORITIES - 1)
#define CONSUMER_LINE_SIZE 3
SemaphoreHandle_t xSemaphore_producer;
SemaphoreHandle_t xSemaphore_consumer;
/*******************************************************************************
 * Prototypes
 ******************************************************************************/
static void producer_task(void *pvParameters);
static void consumer_task(void *pvParameters);

/*******************************************************************************
 * Code
 ******************************************************************************/
/*!
 * @brief Main function
 */
int main(void)
{
    /* Init board hardware. */
    BOARD_InitPins();
    BOARD_BootClockRUN();
    BOARD_InitDebugConsole();
    xTaskCreate(producer_task, "PRODUCER_TASK", configMINIMAL_STACK_SIZE, NULL, TASK_PRIO, NULL);
    PRINTF("Producer_task created.\r\n");
    /* Start scheduling. */
    vTaskStartScheduler();
    for (;;)
        ;
}

/*!
 * @brief Task producer_task.
 */
static void producer_task(void *pvParameters)
{
    uint32_t i;

    xSemaphore_producer = xSemaphoreCreateBinary();
    if (xSemaphore_producer == NULL)
    {
        PRINTF("xSemaphore_producer creation failed.\r\n");
        vTaskSuspend(NULL);
    }

    xSemaphore_consumer = xSemaphoreCreateBinary();
    if (xSemaphore_consumer == NULL)
    {
        PRINTF("xSemaphore_consumer creation failed.\r\n");
        vTaskSuspend(NULL);
    }

    for (i = 0; i < CONSUMER_LINE_SIZE; i++)
    {
        xTaskCreate(consumer_task, "CONSUMER_TASK", configMINIMAL_STACK_SIZE, (void *)i, TASK_PRIO, NULL);
        PRINTF("Consumer_task %d created.\r\n", i);
    }

    while (1)
    {
        /* Producer is ready to provide item. */
        xSemaphoreGive(xSemaphore_consumer);
        /* Producer is waiting when consumer will be ready to accept item. */
        if (xSemaphoreTake(xSemaphore_producer, portMAX_DELAY) == pdTRUE)
        {
            PRINTF("Producer released item.\r\n");
        }
        else
        {
            PRINTF("Producer is waiting for customer.\r\n");
        }
    }
}

/*!
 * @brief Task consumer_task.
 */
static void consumer_task(void *pvParameters)
{
    PRINTF("Consumer number: %d\r\n", pvParameters);
    while (1)
    {
        /* Consumer is ready to accept. */
        xSemaphoreGive(xSemaphore_producer);
        /* Consumer is waiting when producer will be ready to produce item. */
        if (xSemaphoreTake(xSemaphore_consumer, portMAX_DELAY) == pdTRUE)
        {
            PRINTF("Consumer %d accepted item.\r\n", pvParameters);
        }
        else
        {
            PRINTF("Consumer %d is waiting for producer.\r\n", pvParameters);
        }
    }
}
