/*****************************************************************************
 * Copyright (c) 2019, Nsing Technologies Pte. Ltd
 *
 * 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.
 *
 * Nsing' 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 Nsing "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 Nsing 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.
 * ****************************************************************************/

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

/** @addtogroup N32G031_StdPeriph_Examples
 * @{
 */

/** @addtogroup SPI_I2S_Switch
 * @{
 */

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

#define BufferSize 32

I2S_InitType I2S_InitStructure;
SPI_InitType SPI_InitStructure;
uint16_t I2S3_Buffer_Tx[BufferSize] = {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 SPI3_Buffer_Tx[BufferSize] = {0x5152, 0x5354, 0x5556, 0x5758, 0x595A, 0x5B5C, 0x5D5E, 0x5F60,
                                       0x6162, 0x6364, 0x6566, 0x6768, 0x696A, 0x6B6C, 0x6D6E, 0x6F70,
                                       0x7172, 0x7374, 0x7576, 0x7778, 0x797A, 0x7B7C, 0x7D7E, 0x7F80,
                                       0x8182, 0x8384, 0x8586, 0x8788, 0x898A, 0x8B8C, 0x8D8E, 0x8F90};

__IO uint16_t I2S2_Buffer_Rx[BufferSize];
__IO uint16_t SPI2_Buffer_Rx[BufferSize];
__IO uint16_t TxIdx = 0, RxIdx = 0;
volatile TestStatus TransferStatus1 = FAILED, TransferStatus2 = FAILED;
volatile TestStatus TransferStatus3 = FAILED;
ErrorStatus HSEStartUpStatus;

void RCC_Configuration(void);
void GPIO_Configuration(void);
TestStatus Buffercmp(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_n32g031.s) before to branch to application main.
         To reconfigure the default setting of SystemInit() function, refer to
         system_n32g031.c file
       */

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

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

    /* Deinitializes the SPI1 peripheral registers --------------------*/
    SPI_I2S_DeInit(SPI1);

    /* I2S peripheral configuration */
    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;

    /* Master Transmitter to Slave Receiver communication ------------*/
    /* I2S configuration */
    I2S_InitStructure.I2sMode = I2S_MODE_SlAVE_RX;
    I2S_Init(SPI1, &I2S_InitStructure);

    /* Enable the I2S */
    I2S_Enable(SPI1, ENABLE);

    /* Begin the communication in I2S mode */
    while (RxIdx < BufferSize)
    {
        /* Wait the Rx buffer to be full */
        while (SPI_I2S_GetStatus(SPI1, SPI_I2S_RNE_FLAG) == RESET)
        {
        }
        /* Store the I2S received data in the relative data table */
        I2S2_Buffer_Rx[RxIdx++] = SPI_I2S_ReceiveData(SPI1);
    }

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

    /* Reset TxIdx, RxIdx indexes */
    TxIdx = 0;
    RxIdx = 0;

    /* Switch to SPI mode communication ----------------------------------------*/
    /* SPI1 configuration */
    SPI_InitStructure.DataDirection = SPI_DIR_DOUBLELINE_RONLY;
    SPI_InitStructure.SpiMode = SPI_MODE_SLAVE;
    SPI_InitStructure.DataLen = SPI_DATA_SIZE_16BITS;
    SPI_InitStructure.CLKPOL = SPI_CLKPOL_LOW;
    SPI_InitStructure.CLKPHA = SPI_CLKPHA_SECOND_EDGE;
    SPI_InitStructure.NSS = SPI_NSS_SOFT;
    SPI_InitStructure.BaudRatePres = SPI_BR_PRESCALER_16;
    SPI_InitStructure.FirstBit = SPI_FB_MSB;
    SPI_InitStructure.CRCPoly = 7;
    SPI_Init(SPI1, &SPI_InitStructure);

    /* Enable SPI1 */
    SPI_Enable(SPI1, ENABLE);

    /* Begin the communication in SPI mode */
    while (RxIdx < BufferSize)
    {
        /* Wait the Rx buffer to be full */
        while (SPI_I2S_GetStatus(SPI1, SPI_I2S_RNE_FLAG) == RESET)
        {
        }
        /* Store the SPI1 received data in the relative data table */
        SPI2_Buffer_Rx[RxIdx++] = SPI_I2S_ReceiveData(SPI1);
    }

    TransferStatus2 = Buffercmp((uint16_t *)SPI2_Buffer_Rx, SPI3_Buffer_Tx, BufferSize);
    /* TransferStatus2 = PASSED, if the data transmitted from master and received by
                                 slave are the same
       TransferStatus2 = FAILED, if the data transmitted from master and received by
                                 slave are different */

    /* Reset TxIdx, RxIdx indexes and receive table values */
    for (TxIdx = 0; TxIdx < BufferSize; TxIdx++)
    {
        I2S2_Buffer_Rx[TxIdx] = 0;
    }

    TxIdx = 0;
    RxIdx = 0;

    /* Slave Transmitter to Master Receiver communication ------------*/
    /* I2S configuration */
    I2S_InitStructure.I2sMode = I2S_MODE_MASTER_RX;
    I2S_Init(SPI1, &I2S_InitStructure);

    /* delay sometimes */
    for (TxIdx = 0; TxIdx < 512; TxIdx++)
    {
    }

    /* Enable the I2S */
    I2S_Enable(SPI1, ENABLE);

    /* Begin the communication in I2S mode */
    while (RxIdx < BufferSize)
    {
        /* Wait the Rx buffer to be full */
        while (SPI_I2S_GetStatus(SPI1, SPI_I2S_RNE_FLAG) == RESET)
        {
        }
        /* Store the I2S received data in the relative data table */
        I2S2_Buffer_Rx[RxIdx++] = SPI_I2S_ReceiveData(SPI1);
    }

    TransferStatus3 = Buffercmp((uint16_t *)I2S2_Buffer_Rx, I2S3_Buffer_Tx, BufferSize);
    /* TransferStatus3 = PASSED, if the data transmitted from master and received by
                                 slave are the same
       TransferStatus3 = FAILED, if the data transmitted from master and received by
                                 slave are different */

    while (1)
    {
    }
}

/**
 * @brief  Configures the different system clocks.
 */
void RCC_Configuration(void)
{
#if 0   
    /* 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)
        {
        }
    }
#endif
    /* Enable peripheral clocks --------------------------------------------------*/
    /* GPIOA and AFIO clocks enable */
    RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOA | RCC_APB2_PERIPH_AFIO, ENABLE);

    /* SPI1 clocks enable */
    RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_SPI1, ENABLE);
}

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

    GPIO_InitStruct(&GPIO_InitStructure);

    /* Configure SPI1 pins: CK, WS and SD ---------------------------------*/
    GPIO_InitStructure.Pin = GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_7;
    GPIO_InitStructure.GPIO_Mode = GPIO_MODE_AF_PP;
    GPIO_InitStructure.GPIO_Pull = GPIO_NO_PULL;
    GPIO_InitStructure.GPIO_Speed = GPIO_SPEED_HIGH;
    GPIO_InitStructure.GPIO_Alternate = GPIO_AF0_SPI1;
    GPIO_InitPeripheral(GPIOA, &GPIO_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;
}

#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

/**
 * @}
 */

/**
 * @}
 */
