void sd_card_mount_card_capacity (void)
{
    if(f_mount(&SDFatFS, (TCHAR const*)SDPath, 1) != FR_OK)
    {
       SendString("SD card mounting error");
        Error_Handler();
    }
    else
    {
#if 1
       {
         uint8_t buf[30];
        sprintf(buf,"SD_Cap %llu \n\r", ((unsigned long long)hsd1.SdCard.BlockSize * hsd1.SdCard.BlockNbr));
        SendString(buf);     //  Display capacity 
       }
#endif
    }
}


void sd_card_write_read (void)
{
    FRESULT res; /* FatFs function common result code */
	uint8_t sd_state = MSD_OK;
	
	if((WriteCnt == 0) && (Stop_Read_Write_Flag == 0))
	{
		if(f_open(&SDFile, "DATA.TXT", FA_CREATE_ALWAYS | FA_WRITE) != FR_OK)
		{
			Error_Handler();
		}
		else
		{		
			res = f_write(&SDFile, &sector_d[0], 512, &byteswritten);    
			if((res == FR_OK) && (byteswritten > 0))
			{
				f_close(&SDFile);
			}
		}
		Stop_Read_Write_Flag = 1;
		WriteCnt = WriteCnt + 1;
	}
	else if((WriteCnt >= 1) && (Stop_Read_Write_Flag == 1))
	{		
		if(f_open(&SDFile, "DATA.TXT", FA_OPEN_EXISTING |FA_WRITE | FA_OPEN_APPEND) != FR_OK)
		{
			 Error_Handler();			
		}
		else
		{
			res = f_write(&SDFile, &sector_d[0], 512, &byteswritten);  
			if((res == FR_OK) && (byteswritten > 0))
			{
				datawritecnt++;

			}
		}
	}
	WriteCnt = WriteCnt + 1;	
	if(WriteCnt>=2073600)   //This count is for the 8days recording  
	{
		Stop_Read_Write_Flag = 2;  //Stop writing file
	}
		 	
}