/*
* 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.
*/

/*  Standard C Included Files */
#include <string.h>
/*  SDK Included Files */
#include "board.h"
#include "fsl_debug_console.h"
#include "fsl_i2c.h"

#include "fsl_common.h"
#include "pin_mux.h"
#include "fsl_gpio.h"
#include "fsl_port.h"
/*******************************************************************************
 * Definitions
 ******************************************************************************/
/* I2C source clock */
#define I2C_MASTER_CLK_SRC I2C0_CLK_SRC
#define EXAMPLE_I2C_MASTER_BASEADDR I2C0

#define I2C_MASTER_SLAVE_ADDR_7BIT 0x7EU
#define I2C_BAUDRATE 100000U
#define I2C_DATA_LENGTH 32U

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

/*******************************************************************************
 * Variables
 ******************************************************************************/

uint8_t g_master_txBuff[I2C_DATA_LENGTH];
uint8_t g_master_rxBuff[I2C_DATA_LENGTH];
i2c_master_handle_t g_m_handle;
volatile bool g_MasterCompletionFlag = false;

/*******************************************************************************
 * Code
 ******************************************************************************/

static void i2c_master_callback(I2C_Type *base, i2c_master_handle_t *handle, status_t status, void *userData)
{
    /* Signal transfer success when received success status. */
    if (status == kStatus_Success)
    {
        g_MasterCompletionFlag = true;
    }
}

/*!
 * @brief Main function
 */
int main(void)
{
    i2c_master_config_t masterConfig;
    uint32_t sourceClock;
    i2c_master_transfer_t masterXfer;

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

    PRINTF("\r\nI2C board2board interrupt example -- Master transfer.\r\n");

    /* Set up i2c master to send data to slave*/
    for (uint32_t i = 0U; i < I2C_DATA_LENGTH; i++)
    {
        g_master_txBuff[i] = i;
    }

    PRINTF("Master will send data :");
    for (uint32_t i = 0U; i < I2C_DATA_LENGTH; i++)
    {
        if (i % 8 == 0)
        {
            PRINTF("\r\n");
        }
        PRINTF("0x%2x  ", g_master_txBuff[i]);
    }
    PRINTF("\r\n\r\n");

    /*
     * masterConfig->baudRate_Bps = 100000U;
     * masterConfig->enableHighDrive = false;
     * masterConfig->enableStopHold = false;
     * masterConfig->glitchFilterWidth = 0U;
     * masterConfig->enableMaster = true;
     */
    I2C_MasterGetDefaultConfig(&masterConfig);
    masterConfig.baudRate_Bps = I2C_BAUDRATE;

    sourceClock = CLOCK_GetFreq(I2C_MASTER_CLK_SRC);

    I2C_MasterInit(EXAMPLE_I2C_MASTER_BASEADDR, &masterConfig, sourceClock);

    memset(&g_m_handle, 0, sizeof(g_m_handle));
    memset(&masterXfer, 0, sizeof(masterXfer));

    masterXfer.slaveAddress = I2C_MASTER_SLAVE_ADDR_7BIT;
    masterXfer.direction = kI2C_Write;
    masterXfer.subaddress = (uint32_t)NULL;
    masterXfer.subaddressSize = 0;
    masterXfer.data = g_master_txBuff;
    masterXfer.dataSize = I2C_DATA_LENGTH;
    masterXfer.flags = kI2C_TransferDefaultFlag;

    I2C_MasterTransferCreateHandle(EXAMPLE_I2C_MASTER_BASEADDR, &g_m_handle, i2c_master_callback, NULL);
    I2C_MasterTransferNonBlocking(EXAMPLE_I2C_MASTER_BASEADDR, &g_m_handle, &masterXfer);

    /*  Wait for transfer completed. */
    while (!g_MasterCompletionFlag)
    {
    }
    g_MasterCompletionFlag = false;

    PRINTF("Receive sent data from slave :");

    masterXfer.slaveAddress = I2C_MASTER_SLAVE_ADDR_7BIT;
    masterXfer.direction = kI2C_Read;
    masterXfer.subaddress = (uint32_t)NULL;
    masterXfer.subaddressSize = 0;
    masterXfer.data = g_master_rxBuff;
    masterXfer.dataSize = I2C_DATA_LENGTH;

    masterXfer.flags = kI2C_TransferDefaultFlag;

    I2C_MasterTransferNonBlocking(EXAMPLE_I2C_MASTER_BASEADDR, &g_m_handle, &masterXfer);

    /*  Reset master completion flag to false. */
    g_MasterCompletionFlag = false;

    /*  Wait for transfer completed. */
    while (!g_MasterCompletionFlag)
    {
    }
    g_MasterCompletionFlag = false;

    for (uint32_t i = 0U; i < I2C_DATA_LENGTH; i++)
    {
        if (i % 8 == 0)
        {
            PRINTF("\r\n");
        }
        PRINTF("0x%2x  ", g_master_rxBuff[i]);
    }
    PRINTF("\r\n\r\n");

    /* Transfer completed. Check the data.*/
    for (uint32_t i = 0U; i < I2C_DATA_LENGTH; i++)
    {
        if (g_master_rxBuff[i] != g_master_txBuff[i])
        {
            PRINTF("\r\nError occured in the transfer ! \r\n");
            break;
        }
    }

    PRINTF("\r\nEnd of I2C example .\r\n");
    while (1)
    {
    }
}
