#include "eeprom.h"





typedef union _eeprom_info
{    
    struct 
    {
        uint8_t isSave;
        uint16_t SensorMAX;
        uint16_t SensorMIN;
        uint8_t Reserved[SECTOR_SIZE_BYTE - 6];
        uint8_t CheckSum;
    }eeprom_data;
    uint8_t eeprom_buffer[SECTOR_SIZE_BYTE];
}EEPROM_INFO;


static EEPROM_INFO eeprom_info;




/*-------------------------------------------------------------------------*//**
 * @brief         FlashMem_Do_PageWt
 * @param[in]     tPageAddr
 * @param[in]     tBuf
 * @return        None
 *//*-------------------------------------------------------------------------*/
void FlashMem_Do_PageWt( uint32_t tPageAddr, uint32_t* tBuf )
{
   uint32_t    UserID_Buf;

   UserID_Buf = 0x4F17DC86;
   HAL_FMC_PageWrite( UserID_Buf, tPageAddr, tBuf );
}

/*-------------------------------------------------------------------------*//**
 * @brief         FlashMem_Do_PageEr
 * @param[in]     tPageAddr
 * @return        None
 *//*-------------------------------------------------------------------------*/
void FlashMem_Do_PageEr( uint32_t tPageAddr )
{
   uint32_t    UserID_Buf;

   UserID_Buf = 0xA901358F;
   HAL_FMC_PageErase( UserID_Buf, tPageAddr );
}

void FlashMEM_Clock_Initialization(void)
{
    // enable peripheral clock
    HAL_SCU_Peripheral_EnableClock2( PPCLKEN2_FMCLKE, PPxCLKE_Enable );    
    // init crc
    HAL_CRC_Init();
}



bool EEPROM_Read_SettingValue(uint16_t* pGetMax, uint16_t* pGetMin)
{
    uint8_t i;
    uint16_t checksum_init = 0x5AA5;
    uint16_t checksum_result;

    __disable_irq();
    memcpy(&eeprom_info.eeprom_buffer[0], (uint32_t *)CONFIG_ADDRESS, SECTOR_SIZE_BYTE);
    __enable_irq();

    if(eeprom_info.eeprom_data.isSave != true)
    {
        return false;
    }

    // CRC Block Calculation
    CRC->INIT = checksum_init;
    CRC->CR = 0
            | MODS_UserMode  // Set User Mode
            | CRC_RLTCLR     // Initialize CRC_RLT Register With CRC_INIT
            | CRC_16           // Polynomial Selection bit : CRC-16
            | CRC_NOINC      // Address Not Auto Increment
            ;
    
    CRCRun();
    for(i = 0 ; i < (SECTOR_SIZE_BYTE-1) ; i++)
    {
        CRC->IN = eeprom_info.eeprom_buffer[i];
    }
    CRCStop();
    checksum_result = CRC->RLT;

    if((checksum_result & 0xFF) == eeprom_info.eeprom_data.CheckSum)
    {
        *pGetMax = eeprom_info.eeprom_data.SensorMAX;
        *pGetMin = eeprom_info.eeprom_data.SensorMIN;
        return true;
    }
    return false;
}


bool EEPROM_Write_SettingValue(uint16_t SetMax, uint16_t SetMin)
{
    uint8_t i;
    uint16_t checksum_init = 0x5AA5;
    uint16_t checksum_result;

    if(eeprom_info.eeprom_data.isSave == true)
    {
        if(eeprom_info.eeprom_data.SensorMAX == SetMax && eeprom_info.eeprom_data.SensorMIN == SetMin)
            return true;
    }    

    memset(&eeprom_info.eeprom_buffer[0], 0, SECTOR_SIZE_BYTE);
    eeprom_info.eeprom_data.isSave = true;
    eeprom_info.eeprom_data.SensorMAX = SetMax;
    eeprom_info.eeprom_data.SensorMIN = SetMin;

    // CRC Block Calculation
    CRC->INIT = checksum_init;
    CRC->CR = 0
            | MODS_UserMode  // Set User Mode
            | CRC_RLTCLR     // Initialize CRC_RLT Register With CRC_INIT
            | CRC_16           // Polynomial Selection bit : CRC-16
            | CRC_NOINC      // Address Not Auto Increment
            ;
    
    CRCRun();
    for(i = 0 ; i < (SECTOR_SIZE_BYTE-1) ; i++)
    {
        CRC->IN = eeprom_info.eeprom_buffer[i];
    }
    CRCStop();
    checksum_result = CRC->RLT;



    eeprom_info.eeprom_data.CheckSum = checksum_result & 0xFF;


    __disable_irq();
    FlashMem_Do_PageEr(CONFIG_ADDRESS);
    FlashMem_Do_PageWt(CONFIG_ADDRESS, (uint32_t *)&eeprom_info.eeprom_buffer[0]);
    __enable_irq();

    return true;
}