/*****************************************************************************
 * 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,
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 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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 * ****************************************************************************/

/**
 * @file main.c
 * @author Nsing
 * @version v1.0.0
 *
 * @copyright Copyright (c) 2019, Nsing Technologies Pte. Ltd All rights reserved.
 */
#include "n32g031.h"
#include "main.h"
#include "log.h"

/** @addtogroup N32G031_StdPeriph_Examples
 * @{
 */

/** @addtogroup I2S_DMA
 * @{
 */

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

#define BufferSize 32

DMA_InitType DMA_InitStructure;
GPIO_InitType GPIO_InitStructure;
I2S_InitType I2S_InitStructure;

const uint16_t I2S_MASTER_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 I2S_SLAVE_Buffer_Rx[BufferSize];
volatile TestStatus TransferStatus = 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
      */
    log_init();

    log_info("\n this is a I2S DMA SLAVE Demo.\n");
    /* System clocks configuration ---------------------------------------------*/
    RCC_Configuration();

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

    /* Deinitializes the SPI1 peripheral registers --------------------*/
    SPI_I2S_DeInit(I2S_SLAVE);

    /* I2S_SLAVE_Rx_DMA_Channel configuration ---------------------------------------------*/
    DMA_DeInit(I2S_SLAVE_Rx_DMA_Channel);
    DMA_InitStructure.PeriphAddr = (uint32_t)&SPI1->DAT;
    DMA_InitStructure.MemAddr = (uint32_t)I2S_SLAVE_Buffer_Rx;
    DMA_InitStructure.Direction = DMA_DIR_PERIPH_SRC;
    DMA_InitStructure.BufSize = BufferSize;
    DMA_InitStructure.PeriphInc = DMA_PERIPH_INC_DISABLE;
    DMA_InitStructure.DMA_MemoryInc = DMA_MEM_INC_ENABLE;
    DMA_InitStructure.PeriphDataSize = DMA_PERIPH_DATA_SIZE_HALFWORD;
    DMA_InitStructure.MemDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.CircularMode = DMA_MODE_NORMAL;
    DMA_InitStructure.Priority = DMA_PRIORITY_VERY_HIGH;
    DMA_InitStructure.Mem2Mem = DMA_M2M_DISABLE;
    DMA_Init(I2S_SLAVE_Rx_DMA_Channel, &DMA_InitStructure);
    DMA_RequestRemap(DMA_REMAP_SPI1_RX, DMA, I2S_SLAVE_Rx_DMA_Channel, ENABLE);

    /* 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(I2S_SLAVE, &I2S_InitStructure);

    /* Enable I2S_SLAVE Rx request */
    SPI_I2S_EnableDma(I2S_SLAVE, SPI_I2S_DMA_RX, ENABLE);

    /* Enable the I2S */
    I2S_Enable(I2S_SLAVE, ENABLE);

    /* Enable DMA Channel2 */
    DMA_EnableChannel(I2S_SLAVE_Rx_DMA_Channel, ENABLE);

    /* Wait for DMA channel2 transfer complete */
    while (!DMA_GetFlagStatus(I2S_SLAVE_Rx_DMA_FLAG, DMA))
        ;

    /* Check the correctness of written data */
    TransferStatus = Buffercmp(I2S_SLAVE_Buffer_Rx, (uint16_t *)I2S_MASTER_Buffer_Tx, BufferSize);
    /* TransferStatus = PASSED, if the transmitted and received data
       are equal */
    /* TransferStatus = FAILED, if the transmitted and received data
       are different */

    /* I2S_MASTER_Tx_DMA_Channel configuration ---------------------------------------------*/
    DMA_DeInit(I2S_SLAVE_Tx_DMA_Channel);
    DMA_InitStructure.PeriphAddr = (uint32_t)&SPI1->DAT;
    DMA_InitStructure.MemAddr = (uint32_t)I2S_SLAVE_Buffer_Rx;
    DMA_InitStructure.Direction = DMA_DIR_PERIPH_DST;
    DMA_InitStructure.BufSize = BufferSize;
    DMA_InitStructure.PeriphInc = DMA_PERIPH_INC_DISABLE;
    DMA_InitStructure.DMA_MemoryInc = DMA_MEM_INC_ENABLE;
    DMA_InitStructure.PeriphDataSize = DMA_PERIPH_DATA_SIZE_HALFWORD;
    DMA_InitStructure.MemDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.CircularMode = DMA_MODE_NORMAL;
    DMA_InitStructure.Priority = DMA_PRIORITY_VERY_HIGH;
    DMA_InitStructure.Mem2Mem = DMA_M2M_DISABLE;
    DMA_Init(I2S_SLAVE_Tx_DMA_Channel, &DMA_InitStructure);
    DMA_RequestRemap(DMA_REMAP_SPI1_TX, DMA, I2S_SLAVE_Tx_DMA_Channel, ENABLE);

    DMA_EnableChannel(I2S_SLAVE_Rx_DMA_Channel, DISABLE);
    SPI_I2S_EnableDma(I2S_SLAVE, SPI_I2S_DMA_RX, DISABLE);
    I2S_Enable(I2S_SLAVE, DISABLE);

    /* Master Transmitter to Slave Receiver communication ------------*/
    /* I2S configuration */
    I2S_InitStructure.I2sMode = I2S_MODE_SlAVE_TX;
    I2S_Init(I2S_SLAVE, &I2S_InitStructure);

    /* Enable I2S_SLAVE Rx request */
    SPI_I2S_EnableDma(I2S_SLAVE, SPI_I2S_DMA_TX, ENABLE);

    /* Enable the I2S */
    I2S_Enable(I2S_SLAVE, ENABLE);

    /* Enable DMA Channel3 */
    DMA_EnableChannel(I2S_SLAVE_Tx_DMA_Channel, ENABLE);

    /* Wait for DMA channel3 transfer complete */
    while (!DMA_GetFlagStatus(I2S_SLAVE_Tx_DMA_FLAG, DMA))
        ;
    /* Wait for I2S transfer complete */
    while (SPI_I2S_GetStatus(I2S_SLAVE, SPI_I2S_BUSY_FLAG))
        ;

    if (TransferStatus == PASSED)
    {
        log_info("I2S DMA SLAVE Demo test Succeed.\n");
    }
    else
    {
        log_info("I2S DMA SLAVE Demo test Fail.\n");
    }
    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 --------------------------------------------------*/
    /* Enable I2S_SLAVE DMA clock */
    RCC_EnableAHBPeriphClk(I2S_SLAVE_DMA_CLK, ENABLE);

    /* GPIOA and AFIO clocks enable */
    RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOA | RCC_APB2_PERIPH_AFIO, ENABLE);

    /* SPI1 clocks enable */
    RCC_EnableAPB2PeriphClk(I2S_SLAVE_CLK, 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_I2S;
    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

/**
 * @}
 */

/**
 * @}
 */
