/*****************************************************************************
 * Copyright (c) 2022, 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
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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 * ****************************************************************************/

/**
 * @file main.c
 * @author Nations
 * @version V1.2.2
 *
 * @copyright Copyright (c) 2022, Nations Technologies Inc. All rights reserved.
 */
#include "main.h"
#include "log.h"

#include <string.h>

#define BUFFER_SIZE (sizeof(SRC_Const_Buffer))

DMA_InitType DMA_InitStructure;
__IO uint32_t CurrDataCounterBegin = 0;
__IO uint32_t CurrDataCounterEnd   = 0x01; /* This variable should not be initialized to 0 */

const uint32_t SRC_Const_Buffer[] = {
    0x72aa0305, 0x839916bf, 0x913782c5, 0x7e3bd953, 0x4174430c, 0x40d59981, 0xbccff537, 0xd22bca1a,
    0xda039c07, 0xff38219a, 0x17f16c33, 0x0056b9cf, 0x4e75ab0a, 0x0751b137, 0xbb051ec9, 0xcac01e06,
    0x5de647ba, 0xf2bd2108, 0x60a32be0, 0xbf80a68f, 0x299b4a55, 0xd37b1965, 0x84a3ca5b, 0x0f08f335,
    0x21c4084b, 0x738688ca, 0xe7971a03, 0xadcd6bfc, 0xd4bb55ae, 0x0ea4ed88, 0x131711a3, 0x4e92f42f,
};

uint32_t DST_Buffer[BUFFER_SIZE];

void RCC_Configuration(void);
void NVIC_Configuration(void);

int main(void)
{
    log_init();
    log_info("DMA Flash to RAM Demo\n");

    /* System Clocks Configuration */
    RCC_Configuration();

    /* NVIC configuration */
    NVIC_Configuration();

    /* DMA1 channel1 configuration */
    DMA_DeInit(DMA_CHANNEL_USED);
    DMA_StructInit(&DMA_InitStructure);
    DMA_InitStructure.PeriphAddr     = (uint32_t)SRC_Const_Buffer;
    DMA_InitStructure.MemAddr        = (uint32_t)DST_Buffer;
    DMA_InitStructure.Direction      = DMA_DIR_PERIPH_SRC;
    DMA_InitStructure.BufSize        = BUFFER_SIZE;
    DMA_InitStructure.PeriphInc      = DMA_PERIPH_INC_ENABLE;
    DMA_InitStructure.DMA_MemoryInc  = DMA_MEM_INC_ENABLE;
    DMA_InitStructure.PeriphDataSize = DMA_PERIPH_DATA_SIZE_WORD;
    DMA_InitStructure.MemDataSize    = DMA_MemoryDataSize_Word;
    DMA_InitStructure.CircularMode   = DMA_MODE_NORMAL;
    DMA_InitStructure.Priority       = DMA_PRIORITY_HIGH;
    DMA_InitStructure.Mem2Mem        = DMA_M2M_ENABLE;
    DMA_Init(DMA_CHANNEL_USED, &DMA_InitStructure);
    /* In memory-to-memory mode, it is recommended to set an unused 
    peripheral request source in the system, otherwise the request 
    will be mapped to the ADC. */
    DMA_RequestRemap(DMA_REMAP_DAC1, DMA, DMA_CHANNEL_USED, ENABLE);

    /* Enable DMA1 Channel1 Transfer Complete interrupt */
    DMA_ConfigInt(DMA_CHANNEL_USED, DMA_INT_TXC, ENABLE);

    /* Get Current Data Counter value before transfer begins */
    CurrDataCounterBegin = DMA_GetCurrDataCounter(DMA_CHANNEL_USED);

    /* Enable DMA1 Channel1 transfer */
    DMA_EnableChannel(DMA_CHANNEL_USED, ENABLE);

    /* Wait the end of transmission */
    while (CurrDataCounterEnd != 0)
    {
    }

    /* Check if the transmitted and received data are equal */
    if (memcmp(SRC_Const_Buffer, DST_Buffer, BUFFER_SIZE) == 0)
    {
        log_info("DMA Flash to RAM passed\n");
    }
    else
    {
        log_error("DMA Flash to RAM failed\n");
    }

    while (1)
    {
    }
}

/**
 * @brief  Configures the different system clocks.
 */
void RCC_Configuration(void)
{
    /* Enable peripheral clocks ------------------------------------------------*/
    /* Enable DMA clock */
    RCC_EnableAHBPeriphClk(RCC_AHB_PERIPH_DMA, ENABLE);
}

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

    /* Enable DMA1 channel1 IRQ Channel */
    NVIC_InitStructure.NVIC_IRQChannel                   = DMA_IRQN;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority        = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd                = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}

/**
 * @brief  Compares two buffers.
 * @param  pBuffer, pBuffer1: buffers to be compared.
 * @param BufferLength buffer's length
 * @return PASSED: pBuffer identical to pBuffer1
 *         FAILED: pBuffer differs from pBuffer1
 */
Status Buffercmp(const uint32_t* pBuffer, uint32_t* pBuffer1, uint16_t BufferLength)
{
    while (BufferLength--)
    {
        if (*pBuffer != *pBuffer1)
        {
            return FAILED;
        }

        pBuffer++;
        pBuffer1++;
    }

    return PASSED;
}

/**
 * @}
 */

/**
 * @}
 */
