/*****************************************************************************
 * Copyright (c) 2019, Nations Technologies 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:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Nations' name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY NATIONS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * DISCLAIMED. IN NO EVENT SHALL NATIONS 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,
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 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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 * ****************************************************************************/

/**
 * @file main.c
 * @author Nations
 * @version v1.0.0
 *
 * @copyright Copyright (c) 2019, Nations Technologies Inc. All rights reserved.
 */
#include "main.h"

/** @addtogroup N32G4FR_StdPeriph_Examples
 * @{
 */

/** @addtogroup BkpData
 * @{
 */

typedef enum
{
    FAILED = 0,
    PASSED = !FAILED
} TestStatus;

I2S_InitType I2S_InitStructure;
const uint16_t I2S3_Buffer_Tx[32] = {0x0102, 0x0304, 0x0506, 0x0708, 0x090A, 0x0B0C, 0x0D0E, 0x0F10,
                                     0x1112, 0x1314, 0x1516, 0x1718, 0x191A, 0x1B1C, 0x1D1E, 0x1F20,
                                     0x2122, 0x2324, 0x2526, 0x2728, 0x292A, 0x2B2C, 0x2D2E, 0x2F30,
                                     0x3132, 0x3334, 0x3536, 0x3738, 0x393A, 0x3B3C, 0x3D3E, 0x3F40};

uint16_t I2S2_Buffer_Rx[32];
__IO uint32_t TxIdx = 0, RxIdx = 0;
TestStatus TransferStatus1 = FAILED, TransferStatus2 = FAILED;
ErrorStatus HSEStartUpStatus;

void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
TestStatus Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength);
TestStatus Buffercmp24bits(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength);

/**
 * @brief  Main program.
 */
int main(void)
{
    /*!< At this stage the microcontroller clock setting is already configured,
          this is done through SystemInit() function which is called from startup
          file (startup_n32g4fr.s) before to branch to application main.
          To reconfigure the default setting of SystemInit() function, refer to
          system_n32g4fr.c file
        */

    /* System clocks configuration ---------------------------------------------*/
    RCC_Configuration();

    /* NVIC configuration ------------------------------------------------------*/
    NVIC_Configuration();

    /* GPIO configuration ------------------------------------------------------*/
    GPIO_Configuration();

    SPI_I2S_DeInit(SPI3);
    SPI_I2S_DeInit(SPI2);

    /* I2S peripheral configuration */
	  I2S_InitStruct(&I2S_InitStructure);
    I2S_InitStructure.Standard       = I2S_STD_PHILLIPS;
    I2S_InitStructure.DataFormat     = I2S_DATA_FMT_16BITS_EXTENDED;
    I2S_InitStructure.MCLKEnable     = I2S_MCLK_DISABLE;
    I2S_InitStructure.AudioFrequency = I2S_AUDIO_FREQ_48K;
    I2S_InitStructure.CLKPOL         = I2S_CLKPOL_LOW;

    /* I2S3 Master Transmitter to I2S2 Slave Receiver communication -----------*/
    /* I2S3 configuration */
    I2S_InitStructure.I2sMode = I2S_MODE_MASTER_TX;
    I2S_Init(SPI3, &I2S_InitStructure);

    /* I2S2 configuration */
    I2S_InitStructure.I2sMode = I2S_MODE_SlAVE_RX;
    I2S_Init(SPI2, &I2S_InitStructure);

    /* Enable the I2S3 TxE interrupt */
    SPI_I2S_EnableInt(SPI3, SPI_I2S_INT_TE, ENABLE);

    /* Enable the I2S2 RxNE interrupt */
    SPI_I2S_EnableInt(SPI2, SPI_I2S_INT_RNE, ENABLE);

    /* Enable the I2S2 */
    I2S_Enable(SPI2, ENABLE);

    /* Enable the I2S3 */
    I2S_Enable(SPI3, ENABLE);

    /* Wait the end of communication */
    while (RxIdx < 32)
    {
    }

    TransferStatus1 = Buffercmp(I2S2_Buffer_Rx, (uint16_t*)I2S3_Buffer_Tx, 32);
    /* TransferStatus1 = PASSED, if the data transmitted from I2S3 and received by
                                 I2S2 are the same
       TransferStatus1 = FAILED, if the data transmitted from I2S3 and received by
                                 I2S2 are different */

    /* Reinitialize the buffers */
    for (RxIdx = 0; RxIdx < 32; RxIdx++)
    {
        I2S2_Buffer_Rx[RxIdx] = 0;
    }
    TxIdx = 0;
    RxIdx = 0;

    SPI_I2S_DeInit(SPI3);
    SPI_I2S_DeInit(SPI2);

    /* I2S peripheral configuration */
    I2S_InitStructure.Standard       = I2S_STD_PHILLIPS;
    I2S_InitStructure.DataFormat     = I2S_DATA_FMT_24BITS;
    I2S_InitStructure.MCLKEnable     = I2S_MCLK_DISABLE;
    I2S_InitStructure.AudioFrequency = I2S_AUDIO_FREQ_16K;
    I2S_InitStructure.CLKPOL         = I2S_CLKPOL_LOW;

    /* I2S3 Master Transmitter to I2S2 Slave Receiver communication -----------*/
    /* I2S3 configuration */
    I2S_InitStructure.I2sMode = I2S_MODE_MASTER_TX;
    I2S_Init(SPI3, &I2S_InitStructure);

    /* I2S2 configuration */
    I2S_InitStructure.I2sMode = I2S_MODE_SlAVE_RX;
    I2S_Init(SPI2, &I2S_InitStructure);

    /* Enable the I2S3 TxE interrupt */
    SPI_I2S_EnableInt(SPI3, SPI_I2S_INT_TE, ENABLE);

    /* Enable the I2S2 RxNE interrupt */
    SPI_I2S_EnableInt(SPI2, SPI_I2S_INT_RNE, ENABLE);

    /* Enable the I2S2 */
    I2S_Enable(SPI2, ENABLE);

    /* Enable the I2S3 */
    I2S_Enable(SPI3, ENABLE);

    /* Wait the end of communication */
    while (RxIdx < 32)
    {
    }

    TransferStatus2 = Buffercmp24bits(I2S2_Buffer_Rx, (uint16_t*)I2S3_Buffer_Tx, 32);
    /* TransferStatus2 = PASSED, if the data transmitted from I2S3 and received by
                                 I2S2 are the same
       TransferStatus2 = FAILED, if the data transmitted from I2S3 and received by
                                 I2S2 are different */

    while (1)
    {
    }
}

/**
 * @brief  Configures the different system clocks.
 */
void RCC_Configuration(void)
{
    /* RCC system reset(for debug purpose) */
    RCC_DeInit();

    /* Enable HSE */
    RCC_ConfigHse(RCC_HSE_ENABLE);

    /* Wait till HSE is ready */
    HSEStartUpStatus = RCC_WaitHseStable();

    if (HSEStartUpStatus == SUCCESS)
    {
        /* Enable Prefetch Buffer */
        FLASH_PrefetchBufSet(FLASH_PrefetchBuf_EN);

        /* Flash 2 wait state */
        FLASH_SetLatency(FLASH_LATENCY_2);

        /* HCLK = SYSCLK */
        RCC_ConfigHclk(RCC_SYSCLK_DIV1);

        /* PCLK2 = HCLK */
        RCC_ConfigPclk2(RCC_HCLK_DIV1);

        /* PCLK1 = HCLK/2 */
        RCC_ConfigPclk1(RCC_HCLK_DIV2);

        /* PLLCLK = 8MHz * 9 = 72 MHz */
        RCC_ConfigPll(RCC_PLL_SRC_HSE_DIV1, RCC_PLL_MUL_9);

        /* Enable PLL */
        RCC_EnablePll(ENABLE);

        /* Wait till PLL is ready */
        while (RCC_GetFlagStatus(RCC_FLAG_PLLRD) == RESET)
        {
        }

        /* Select PLL as system clock source */
        RCC_ConfigSysclk(RCC_SYSCLK_SRC_PLLCLK);

        /* Wait till PLL is used as system clock source */
        while (RCC_GetSysclkSrc() != 0x08)
        {
        }
    }

    /* Enable peripheral clocks ------------------------------------------------*/
    /* GPIOA, GPIOB and AFIO clocks enable */
    RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOA | RCC_APB2_PERIPH_GPIOB | RCC_APB2_PERIPH_AFIO, ENABLE);

    /* SPI3 and SPI2 clocks enable */
    RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_SPI3 | RCC_APB1_PERIPH_SPI2, ENABLE);
}

/**
 * @brief  Configures the different GPIO ports.
 */
void GPIO_Configuration(void)
{
    GPIO_InitType GPIO_InitStructure;

    GPIO_ConfigPinRemap(GPIO_RMP_SW_JTAG_SW_ENABLE, ENABLE);

    /* Configure SPI2 pins: CK, WS and SD ---------------------------------*/
	  GPIO_InitStruct(&GPIO_InitStructure);
    GPIO_InitStructure.Pin        = GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_15;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_IN_FLOATING;
    GPIO_InitPeripheral(GPIOB, &GPIO_InitStructure);

    /* Configure SPI3 pins: CK and SD ------------------------------------*/
    GPIO_InitStructure.Pin       = GPIO_PIN_3 | GPIO_PIN_5;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitPeripheral(GPIOB, &GPIO_InitStructure);

    /* Configure SPI3 pins: WS -------------------------------------------*/
    GPIO_InitStructure.Pin = GPIO_PIN_15;
    GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure);
}

/**
 * @brief  Configure the nested vectored interrupt controller.
 */
void NVIC_Configuration(void)
{
    NVIC_InitType NVIC_InitStructure;

    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

    /* SPI3 IRQ Channel configuration */
    NVIC_InitStructure.NVIC_IRQChannel                   = SPI3_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority        = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd                = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    /* SPI2 IRQ channel configuration */
    NVIC_InitStructure.NVIC_IRQChannel                   = SPI2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_Init(&NVIC_InitStructure);
}

/**
 * @brief  Compares two buffers.
 * @param  pBuffer1, pBuffer2: buffers to be compared.
 * @param BufferLength buffer's length
 * @return PASSED: pBuffer1 identical to pBuffer2
 *         FAILED: pBuffer1 differs from pBuffer2
 */
TestStatus Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength)
{
    while (BufferLength--)
    {
        if (*pBuffer1 != *pBuffer2)
        {
            return FAILED;
        }

        pBuffer1++;
        pBuffer2++;
    }

    return PASSED;
}

/**
 * @brief  Compares two buffers in 24 bits data format.
 * @param  pBuffer1, pBuffer2: buffers to be compared.
 * @param BufferLength buffer's length
 * @return PASSED: pBuffer1 identical to pBuffer2
 *         FAILED: pBuffer1 differs from pBuffer2
 */
TestStatus Buffercmp24bits(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength)
{
    while (BufferLength--)
    {
        if (*pBuffer1 != *pBuffer2)
        {
            if (*pBuffer1 != (*pBuffer2 & 0xFF00))
            {
                return FAILED;
            }
        }

        pBuffer1++;
        pBuffer2++;
    }

    return PASSED;
}

#ifdef USE_FULL_ASSERT

/**
 * @brief  Reports the name of the source file and the source line number
 *         where the assert_param error has occurred.
 * @param file pointer to the source file name
 * @param line assert_param error line source number
 */
void assert_failed(const uint8_t* expr, const uint8_t* file, uint32_t line)
{
    /* User can add his own implementation to report the file name and line number,
       ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

    /* Infinite loop */
    while (1)
    {
    }
}

#endif

/**
 * @}
 */

/**
 * @}
 */
