/**
  ******************************************************************************
  * @file    stm32h745i_discovery_qspi.c
  * @author  MCD Application Team
  * @brief   This file includes a standard driver for the MT25TL01G QSPI
  *          memory mounted on STM32H745I-DISCOVERY board.
  @verbatim
  ==============================================================================
                     ##### How to use this driver #####
  ==============================================================================
  [..]
   (#) This driver is used to drive the MT25TL01G QSPI external
       memory mounted on STM32H745I_DISCOVERY board.

   (#) This driver need a specific component driver (MT25TL01G) to be included with.

   (#) Initialization steps:
       (++) Initialize the QPSI external memory using the BSP_QSPI_Init() function. This
            function includes the MSP layer hardware resources initialization and the
            QSPI interface with the external memory.

   (#) QSPI memory operations
       (++) QSPI memory can be accessed with read/write operations once it is
            initialized.
            Read/write operation can be performed with AHB access using the functions
            BSP_QSPI_Read()/BSP_QSPI_Write().
       (++) The function BSP_QSPI_GetInfo() returns the configuration of the QSPI memory.
            (see the QSPI memory data sheet)
       (++) Perform erase block operation using the function BSP_QSPI_Erase_Block() and by
            specifying the block address. You can perform an erase operation of the whole
            chip by calling the function BSP_QSPI_Erase_Chip().
       (++) The function BSP_QSPI_GetStatus() returns the current status of the QSPI memory.
            (see the QSPI memory data sheet)
  @endverbatim
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2019 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "stm32h745i_discovery_qspi.h"

/** @addtogroup BSP
  * @{
  */

/** @addtogroup STM32H745I_DISCOVERY
  * @{
  */

/** @defgroup STM32H745I_DISCOVERY_QSPI STM32H745I_DISCOVERY_QSPI
  * @{
  */


/* Private variables ---------------------------------------------------------*/

/** @defgroup STM32H745I_DISCOVERY_QSPI_Private_Variables Private Variables
  * @{
  */
QSPI_HandleTypeDef QSPIHandle;

/**
  * @}
  */



/* Private functions ---------------------------------------------------------*/

/** @defgroup STM32H745I_DISCOVERY_QSPI_Private_Functions Private Functions
  * @{
  */
static uint8_t QSPI_ResetMemory          (QSPI_HandleTypeDef *hqspi);
static uint8_t QSPI_EnterFourBytesAddress(QSPI_HandleTypeDef *hqspi);
static uint8_t QSPI_DummyCyclesCfg       (QSPI_HandleTypeDef *hqspi);
static uint8_t QSPI_WriteEnable          (QSPI_HandleTypeDef *hqspi);
static uint8_t QSPI_AutoPollingMemReady(QSPI_HandleTypeDef *hqspi, uint32_t Timeout);
static uint8_t QSPI_EnterQPI(QSPI_HandleTypeDef *hqspi);
/**
  * @}
  */

/** @defgroup STM32H745I_DISCOVERY_QSPI_Exported_Functions Exported Functions
  * @{
  */

/**
  * @brief  Initializes the QSPI interface.
  * @retval QSPI memory status
  */
uint8_t BSP_QSPI_Init(void)
{
  QSPIHandle.Instance = QUADSPI;

  /* Call the DeInit function to reset the driver */
  if (HAL_QSPI_DeInit(&QSPIHandle) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* System level initialization */
  BSP_QSPI_MspInit(&QSPIHandle, NULL);

  /* QSPI initialization */
  /* ClockPrescaler set to 1, so QSPI clock = 200MHz / (1+3) = 50MHz */
  QSPIHandle.Init.ClockPrescaler     = 3;
  QSPIHandle.Init.FifoThreshold      = 1;
  QSPIHandle.Init.SampleShifting     = QSPI_SAMPLE_SHIFTING_HALFCYCLE;
  QSPIHandle.Init.FlashSize          = POSITION_VAL(MT25TL01G_FLASH_SIZE) - 1;
  QSPIHandle.Init.ChipSelectHighTime = QSPI_CS_HIGH_TIME_3_CYCLE;
  QSPIHandle.Init.ClockMode          = QSPI_CLOCK_MODE_0;
  QSPIHandle.Init.FlashID            = QSPI_FLASH_ID_2;
  QSPIHandle.Init.DualFlash          = QSPI_DUALFLASH_ENABLE;

  if (HAL_QSPI_Init(&QSPIHandle) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* QSPI memory reset */
  if (QSPI_ResetMemory(&QSPIHandle) != QSPI_OK)
  {
    return QSPI_NOT_SUPPORTED;
  }

  /* Set the QSPI memory in 4-bytes address mode */
  if (QSPI_EnterFourBytesAddress(&QSPIHandle) != QSPI_OK)
  {
    return QSPI_NOT_SUPPORTED;
  }

  /* Configuration of the dummy cycles on QSPI memory side */
  if (QSPI_DummyCyclesCfg(&QSPIHandle) != QSPI_OK)
  {
    return QSPI_NOT_SUPPORTED;
  }

  return QSPI_OK;
}

/**
  * @brief  De-Initializes the QSPI interface.
  * @retval QSPI memory status
  */
uint8_t BSP_QSPI_DeInit(void)
{
  QSPIHandle.Instance = QUADSPI;

  /* Call the DeInit function to reset the driver */
  if (HAL_QSPI_DeInit(&QSPIHandle) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* System level De-initialization */
  BSP_QSPI_MspDeInit(&QSPIHandle, NULL);

  return QSPI_OK;
}

/**
  * @brief  Reads an amount of data from the QSPI memory.
  * @param  pData: Pointer to data to be read
  * @param  ReadAddr: Read start address
  * @param  Size: Size of data to read
  * @retval QSPI memory status
  */
uint8_t BSP_QSPI_Read(uint8_t* pData, uint32_t ReadAddr, uint32_t Size)
{
  QSPI_CommandTypeDef s_command;

  /* Initialize the read command */
  s_command.InstructionMode   = QSPI_INSTRUCTION_4_LINES;
  s_command.Instruction       = QUAD_INOUT_FAST_READ_DTR_CMD; /* DTR QUAD INPUT/OUTPUT FAST READ and 4-BYTE DTR FAST READ commands */
  s_command.AddressMode       = QSPI_ADDRESS_4_LINES;
  s_command.AddressSize       = QSPI_ADDRESS_32_BITS;
  s_command.Address           = ReadAddr;
  s_command.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
  s_command.DataMode          = QSPI_DATA_4_LINES;
  s_command.DummyCycles       = MT25TL01G_DUMMY_CYCLES_READ_QUAD_DTR - 1;
  s_command.NbData            = Size;
  s_command.DdrMode           = QSPI_DDR_MODE_ENABLE;
  s_command.DdrHoldHalfCycle  = QSPI_DDR_HHC_HALF_CLK_DELAY;
  s_command.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;

  /* Configure the command */
  if (HAL_QSPI_Command(&QSPIHandle, &s_command, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* Reception of the data */
  if (HAL_QSPI_Receive(&QSPIHandle, pData, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  return QSPI_OK;
}

/**
  * @brief  Writes an amount of data to the QSPI memory.
  * @param  pData: Pointer to data to be written
  * @param  WriteAddr: Write start address
  * @param  Size: Size of data to write
  * @retval QSPI memory status
  */
uint8_t BSP_QSPI_Write(uint8_t* pData, uint32_t WriteAddr, uint32_t Size)
{
  QSPI_CommandTypeDef s_command;
  uint32_t end_addr, current_size, current_addr;

  /* Calculation of the size between the write address and the end of the page */
  current_size = MT25TL01G_PAGE_SIZE - (WriteAddr % MT25TL01G_PAGE_SIZE);

  /* Check if the size of the data is less than the remaining place in the page */
  if (current_size > Size)
  {
    current_size = Size;
  }

  /* Initialize the address variables */
  current_addr = WriteAddr;
  end_addr = WriteAddr + Size;

  /* Initialize the program command */
  s_command.InstructionMode   = QSPI_INSTRUCTION_4_LINES;
  s_command.Instruction       = QUAD_IN_FAST_PROG_4_BYTE_ADDR_CMD;
  s_command.AddressMode       = QSPI_ADDRESS_4_LINES;
  s_command.AddressSize       = QSPI_ADDRESS_32_BITS;
  s_command.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
  s_command.DataMode          = QSPI_DATA_4_LINES;
  s_command.DummyCycles       = 0;
  s_command.DdrMode           = QSPI_DDR_MODE_DISABLE;
  s_command.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
  s_command.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;

  /* Perform the write page by page */
  do
  {
    s_command.Address = current_addr;
    s_command.NbData  = current_size;

    /* Enable write operations */
    if (QSPI_WriteEnable(&QSPIHandle) != QSPI_OK)
    {
      return QSPI_ERROR;
    }

    /* Configure the command */
    if (HAL_QSPI_Command(&QSPIHandle, &s_command, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
    {
      return QSPI_ERROR;
    }

    /* Transmission of the data */
    if (HAL_QSPI_Transmit(&QSPIHandle, pData, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
    {
      return QSPI_ERROR;
    }

    /* Configure automatic polling mode to wait for end of program */
    if (QSPI_AutoPollingMemReady(&QSPIHandle, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != QSPI_OK)
    {
      return QSPI_ERROR;
    }

    /* Update the address and size variables for next page programming */
    current_addr += current_size;
    pData += current_size;
    current_size = ((current_addr + MT25TL01G_PAGE_SIZE) > end_addr) ? (end_addr - current_addr) : MT25TL01G_PAGE_SIZE;
  } while (current_addr < end_addr);

  return QSPI_OK;
}

/**
  * @brief  Erases the specified block of the QSPI memory.
  * @param  BlockAddress: Block address to erase
  * @retval QSPI memory status
  */
uint8_t BSP_QSPI_Erase_Block(uint32_t BlockAddress)
{
  QSPI_CommandTypeDef s_command;

  /* Initialize the erase command */
  s_command.InstructionMode   = QSPI_INSTRUCTION_4_LINES;
  s_command.Instruction       = SUBSECTOR_ERASE_4_BYTE_ADDR_CMD;
  s_command.AddressMode       = QSPI_ADDRESS_4_LINES;
  s_command.AddressSize       = QSPI_ADDRESS_32_BITS;
  s_command.Address           = BlockAddress;
  s_command.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
  s_command.DataMode          = QSPI_DATA_NONE;
  s_command.DummyCycles       = 0;
  s_command.DdrMode           = QSPI_DDR_MODE_DISABLE;
  s_command.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
  s_command.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;

  /* Enable write operations */
  if (QSPI_WriteEnable(&QSPIHandle) != QSPI_OK)
  {
    return QSPI_ERROR;
  }

  /* Send the command */
  if (HAL_QSPI_Command(&QSPIHandle, &s_command, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* Configure automatic polling mode to wait for end of erase */
  if (QSPI_AutoPollingMemReady(&QSPIHandle, MT25TL01G_SUBSECTOR_ERASE_MAX_TIME) != QSPI_OK)
  {
    return QSPI_ERROR;
  }

  return QSPI_OK;
}

/**
  * @brief  Erases the entire QSPI memory.
  * @retval QSPI memory status
  */
uint8_t BSP_QSPI_Erase_Chip(void)
{
  QSPI_CommandTypeDef s_command;

  /* Initialize the erase command */
  s_command.InstructionMode   = QSPI_INSTRUCTION_4_LINES;
  s_command.Instruction       = DIE_ERASE_CMD;
  s_command.AddressMode       = QSPI_ADDRESS_NONE;
  s_command.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
  s_command.DataMode          = QSPI_DATA_NONE;
  s_command.DummyCycles       = 0;
  s_command.DdrMode           = QSPI_DDR_MODE_DISABLE;
  s_command.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
  s_command.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;

  /* Enable write operations */
  if (QSPI_WriteEnable(&QSPIHandle) != QSPI_OK)
  {
    return QSPI_ERROR;
  }

  /* Send the command */
  if (HAL_QSPI_Command(&QSPIHandle, &s_command, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* Configure automatic polling mode to wait for end of erase */
  if (QSPI_AutoPollingMemReady(&QSPIHandle, MT25TL01G_DIE_ERASE_MAX_TIME) != QSPI_OK)
  {
    return QSPI_ERROR;
  }

  return QSPI_OK;
}

/**
  * @brief  Reads current status of the QSPI memory.
  * @retval QSPI memory status
  */
uint8_t BSP_QSPI_GetStatus(void)
{
  QSPI_CommandTypeDef s_command;
  uint16_t reg;

  /* Initialize the read flag status register command */
  s_command.InstructionMode   = QSPI_INSTRUCTION_4_LINES;
  s_command.Instruction       = READ_FLAG_STATUS_REG_CMD;
  s_command.AddressMode       = QSPI_ADDRESS_NONE;
  s_command.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
  s_command.DataMode          = QSPI_DATA_4_LINES;
  s_command.DummyCycles       = 0;
  s_command.NbData            = 1;
  s_command.DdrMode           = QSPI_DDR_MODE_DISABLE;
  s_command.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
  s_command.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;

  /* Configure the command */
  if (HAL_QSPI_Command(&QSPIHandle, &s_command, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* Reception of the data */
  if (HAL_QSPI_Receive(&QSPIHandle, (uint8_t*)(&reg), HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* Check the value of the register */
  if ((reg & (MT25TL01G_FSR_PRERR | MT25TL01G_FSR_PGERR | MT25TL01G_FSR_ERERR)) != 0)
  {
    return QSPI_ERROR;
  }
  else if ((reg & (MT25TL01G_FSR_PGSUS | MT25TL01G_FSR_ERSUS)) != 0)
  {
    return QSPI_SUSPENDED;
  }
  else if ((reg & MT25TL01G_FSR_READY) != 0)
  {
    return QSPI_OK;
  }
  else
  {
    return QSPI_BUSY;
  }
}

/**
  * @brief  Return the configuration of the QSPI memory.
  * @param  pInfo: pointer on the configuration structure
  * @retval QSPI memory status
  */
uint8_t BSP_QSPI_GetInfo(QSPI_Info* pInfo)
{
  /* Configure the structure with the memory configuration */
  pInfo->FlashSize          = MT25TL01G_FLASH_SIZE;
  pInfo->EraseSectorSize    = (2 * MT25TL01G_SUBSECTOR_SIZE);
  pInfo->ProgPageSize       = MT25TL01G_PAGE_SIZE;
  pInfo->EraseSectorsNumber = (MT25TL01G_FLASH_SIZE/pInfo->EraseSectorSize);
  pInfo->ProgPagesNumber    = (MT25TL01G_FLASH_SIZE/pInfo->ProgPageSize);
  
  return QSPI_OK;
}

/**
  * @brief  Configure the QSPI in memory-mapped mode
  * @retval QSPI memory status
  */
uint8_t BSP_QSPI_EnableMemoryMappedMode(void)
{
  QSPI_CommandTypeDef      s_command;
  QSPI_MemoryMappedTypeDef s_mem_mapped_cfg;

  /* Configure the command for the read instruction */
  s_command.InstructionMode   = QSPI_INSTRUCTION_4_LINES;
  s_command.Instruction       = QUAD_INOUT_FAST_READ_DTR_CMD; /* DTR QUAD INPUT/OUTPUT FAST READ and 4-BYTE DTR FAST READ commands */
  s_command.AddressMode       = QSPI_ADDRESS_4_LINES;
  s_command.AddressSize       = QSPI_ADDRESS_32_BITS;
  s_command.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
  s_command.DataMode          = QSPI_DATA_4_LINES;
  s_command.DummyCycles       = MT25TL01G_DUMMY_CYCLES_READ_QUAD_DTR - 1;
  
  s_command.DdrMode           = QSPI_DDR_MODE_ENABLE;
  s_command.DdrHoldHalfCycle  = QSPI_DDR_HHC_HALF_CLK_DELAY;
  s_command.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;

  /* Configure the memory mapped mode */
  s_mem_mapped_cfg.TimeOutActivation = QSPI_TIMEOUT_COUNTER_DISABLE;
  s_mem_mapped_cfg.TimeOutPeriod     = 0;

  if (HAL_QSPI_MemoryMapped(&QSPIHandle, &s_command, &s_mem_mapped_cfg) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  return QSPI_OK;
}

/**
  * @brief QSPI MSP Initialization
  *        This function configures the hardware resources used in this example:
  *           - Peripheral's clock enable
  *           - Peripheral's GPIO Configuration
  *           - NVIC configuration for QSPI interrupt
  * @retval None
  */
__weak void BSP_QSPI_MspInit(QSPI_HandleTypeDef *hqspi, void *Params)
{
  GPIO_InitTypeDef gpio_init_structure;

  /*##-1- Enable peripherals and GPIO Clocks #################################*/
  /* Enable the QuadSPI memory interface clock */
  QSPI_CLK_ENABLE();
  /* Reset the QuadSPI memory interface */
  QSPI_FORCE_RESET();
  QSPI_RELEASE_RESET();
  /* Enable GPIO clocks */
  QSPI_CLK_GPIO_CLK_ENABLE();
  QSPI_BK1_CS_GPIO_CLK_ENABLE();
  QSPI_BK1_D0_GPIO_CLK_ENABLE();
  QSPI_BK1_D1_GPIO_CLK_ENABLE();
  QSPI_BK1_D2_GPIO_CLK_ENABLE();
  QSPI_BK1_D3_GPIO_CLK_ENABLE();

  QSPI_BK2_CS_GPIO_CLK_ENABLE();
  QSPI_BK2_D0_GPIO_CLK_ENABLE();
  QSPI_BK2_D1_GPIO_CLK_ENABLE();
  QSPI_BK2_D2_GPIO_CLK_ENABLE();
  QSPI_BK2_D3_GPIO_CLK_ENABLE();

  /*##-2- Configure peripheral GPIO ##########################################*/
  /* QSPI CLK GPIO pin configuration  */
  gpio_init_structure.Pin       = QSPI_CLK_PIN;
  gpio_init_structure.Mode      = GPIO_MODE_AF_PP;
  gpio_init_structure.Speed     = GPIO_SPEED_FREQ_VERY_HIGH;
  gpio_init_structure.Pull      = GPIO_NOPULL;
  gpio_init_structure.Alternate = GPIO_AF9_QUADSPI;
  HAL_GPIO_Init(QSPI_CLK_GPIO_PORT, &gpio_init_structure);

  /* QSPI CS GPIO pin configuration  */
  gpio_init_structure.Pin       = QSPI_BK1_CS_PIN;
  gpio_init_structure.Pull      = GPIO_PULLUP;
  gpio_init_structure.Alternate = GPIO_AF10_QUADSPI;
  HAL_GPIO_Init(QSPI_BK1_CS_GPIO_PORT, &gpio_init_structure);

  /* QSPI D0 GPIO pin configuration  */
  gpio_init_structure.Pin       = QSPI_BK1_D0_PIN;
  gpio_init_structure.Pull      = GPIO_NOPULL;
  gpio_init_structure.Alternate = GPIO_AF9_QUADSPI;
  HAL_GPIO_Init(QSPI_BK1_D0_GPIO_PORT, &gpio_init_structure);

  gpio_init_structure.Pin       = QSPI_BK2_D0_PIN;
  gpio_init_structure.Alternate = GPIO_AF9_QUADSPI;
  HAL_GPIO_Init(QSPI_BK2_D0_GPIO_PORT, &gpio_init_structure);

  /* QSPI D1 GPIO pin configuration  */
  gpio_init_structure.Pin       = QSPI_BK1_D1_PIN;
  gpio_init_structure.Alternate = GPIO_AF10_QUADSPI;
  HAL_GPIO_Init(QSPI_BK1_D1_GPIO_PORT, &gpio_init_structure);

  gpio_init_structure.Pin       = QSPI_BK2_D1_PIN;
  gpio_init_structure.Alternate = GPIO_AF9_QUADSPI;
  HAL_GPIO_Init(QSPI_BK2_D1_GPIO_PORT, &gpio_init_structure);

  /* QSPI D2 GPIO pin configuration  */
  gpio_init_structure.Pin       = QSPI_BK1_D2_PIN;
  gpio_init_structure.Alternate = GPIO_AF9_QUADSPI;
  HAL_GPIO_Init(QSPI_BK1_D2_GPIO_PORT, &gpio_init_structure);

  gpio_init_structure.Pin       = QSPI_BK2_D2_PIN;
  HAL_GPIO_Init(QSPI_BK2_D2_GPIO_PORT, &gpio_init_structure);

  /* QSPI D3 GPIO pin configuration  */
  gpio_init_structure.Pin       = QSPI_BK1_D3_PIN;
  HAL_GPIO_Init(QSPI_BK1_D3_GPIO_PORT, &gpio_init_structure);

  gpio_init_structure.Pin       = QSPI_BK2_D3_PIN;
  HAL_GPIO_Init(QSPI_BK2_D3_GPIO_PORT, &gpio_init_structure);

  /*##-3- Configure the NVIC for QSPI #########################################*/
  /* NVIC configuration for QSPI interrupt */
  HAL_NVIC_SetPriority(QUADSPI_IRQn, 0x0F, 0);
  HAL_NVIC_EnableIRQ(QUADSPI_IRQn);

}

/**
  * @brief QSPI MSP De-Initialization
  *        This function frees the hardware resources used in this example:
  *          - Disable the Peripheral's clock
  *          - Revert GPIO and NVIC configuration to their default state
  * @retval None
  */
__weak void BSP_QSPI_MspDeInit(QSPI_HandleTypeDef *hqspi, void *Params)
{
  /*##-1- Disable the NVIC for QSPI ###########################################*/
  HAL_NVIC_DisableIRQ(QUADSPI_IRQn);

  /*##-2- Disable peripherals and GPIO Clocks ################################*/
  /* De-Configure QSPI pins */
  HAL_GPIO_DeInit(QSPI_CLK_GPIO_PORT, QSPI_CLK_PIN);
  HAL_GPIO_DeInit(QSPI_BK1_CS_GPIO_PORT, QSPI_BK1_CS_PIN);
  HAL_GPIO_DeInit(QSPI_BK1_D0_GPIO_PORT, QSPI_BK1_D0_PIN);
  HAL_GPIO_DeInit(QSPI_BK1_D1_GPIO_PORT, QSPI_BK1_D1_PIN);
  HAL_GPIO_DeInit(QSPI_BK1_D2_GPIO_PORT, QSPI_BK1_D2_PIN);
  HAL_GPIO_DeInit(QSPI_BK1_D3_GPIO_PORT, QSPI_BK1_D3_PIN);

  HAL_GPIO_DeInit(QSPI_BK2_CS_GPIO_PORT, QSPI_BK2_CS_PIN);
  HAL_GPIO_DeInit(QSPI_BK2_D0_GPIO_PORT, QSPI_BK2_D0_PIN);
  HAL_GPIO_DeInit(QSPI_BK2_D1_GPIO_PORT, QSPI_BK2_D1_PIN);
  HAL_GPIO_DeInit(QSPI_BK2_D2_GPIO_PORT, QSPI_BK2_D2_PIN);
  HAL_GPIO_DeInit(QSPI_BK2_D3_GPIO_PORT, QSPI_BK2_D3_PIN);

  /*##-3- Reset peripherals ##################################################*/
  /* Reset the QuadSPI memory interface */
  QSPI_FORCE_RESET();
  QSPI_RELEASE_RESET();

  /* Disable the QuadSPI memory interface clock */
  QSPI_CLK_DISABLE();
}

/**
  * @}
  */

/** @addtogroup STM32H745I_DISCOVERY_QSPI_Private_Functions
  * @{
  */

/**
  * @brief  This function reset the QSPI memory.
  * @param  hqspi: QSPI handle
  * @retval None
  */
static uint8_t QSPI_ResetMemory(QSPI_HandleTypeDef *hqspi)
{
  QSPI_CommandTypeDef s_command;

  /* Initialize the reset enable command */
  s_command.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
  s_command.Instruction       = RESET_ENABLE_CMD;
  s_command.AddressMode       = QSPI_ADDRESS_NONE;
  s_command.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
  s_command.DataMode          = QSPI_DATA_NONE;
  s_command.DummyCycles       = 0;
  s_command.DdrMode           = QSPI_DDR_MODE_DISABLE;
  s_command.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
  s_command.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;

  /* Send the command */
  if (HAL_QSPI_Command(hqspi, &s_command, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* Send the reset memory command */
  s_command.Instruction = RESET_MEMORY_CMD;
  if (HAL_QSPI_Command(hqspi, &s_command, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }
  
  s_command.InstructionMode   = QSPI_INSTRUCTION_4_LINES;
  s_command.Instruction       = RESET_ENABLE_CMD;
  /* Send the command */
  if (HAL_QSPI_Command(hqspi, &s_command, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* Send the reset memory command */
  s_command.Instruction = RESET_MEMORY_CMD;
  if (HAL_QSPI_Command(hqspi, &s_command, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }
  
  /* Enter QSPI memory in QPI mode */
  if(QSPI_EnterQPI(&QSPIHandle) != QSPI_OK)
  {
    return QSPI_ERROR;
  }
  
  /* Configure automatic polling mode to wait the memory is ready */
  if (QSPI_AutoPollingMemReady(hqspi, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != QSPI_OK)
  {
    return QSPI_ERROR;
  }

  return QSPI_OK;
}

/**
  * @brief  This function set the QSPI memory in 4-byte address mode
  * @param  hqspi: QSPI handle
  * @retval None
  */
static uint8_t QSPI_EnterFourBytesAddress(QSPI_HandleTypeDef *hqspi)
{
  QSPI_CommandTypeDef s_command;

  /* Initialize the command */
  s_command.InstructionMode   = QSPI_INSTRUCTION_4_LINES;
  s_command.Instruction       = ENTER_4_BYTE_ADDR_MODE_CMD;
  s_command.AddressMode       = QSPI_ADDRESS_NONE;
  s_command.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
  s_command.DataMode          = QSPI_DATA_NONE;
  s_command.DummyCycles       = 0;
  s_command.DdrMode           = QSPI_DDR_MODE_DISABLE;
  s_command.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
  s_command.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;

  /* Enable write operations */
  if (QSPI_WriteEnable(hqspi) != QSPI_OK)
  {
    return QSPI_ERROR;
  }

  /* Send the command */
  if (HAL_QSPI_Command(hqspi, &s_command, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* Configure automatic polling mode to wait the memory is ready */
  if (QSPI_AutoPollingMemReady(hqspi, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != QSPI_OK)
  {
    return QSPI_ERROR;
  }

  return QSPI_OK;
}

/**
  * @brief  This function configure the dummy cycles on memory side.
  * @param  hqspi: QSPI handle
  * @retval None
  */
static uint8_t QSPI_DummyCyclesCfg(QSPI_HandleTypeDef *hqspi)
{
  QSPI_CommandTypeDef s_command;
  uint16_t reg = 0;

  /* Initialize the read volatile configuration register command */
  s_command.InstructionMode   = QSPI_INSTRUCTION_4_LINES;
  s_command.Instruction       = READ_VOL_CFG_REG_CMD;
  s_command.AddressMode       = QSPI_ADDRESS_NONE;
  s_command.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
  s_command.DataMode          = QSPI_DATA_4_LINES;
  s_command.DummyCycles       = 0;
  s_command.NbData            = 2;
  s_command.DdrMode           = QSPI_DDR_MODE_DISABLE;
  s_command.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
  s_command.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;

  /* Configure the command */
  if (HAL_QSPI_Command(hqspi, &s_command, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* Reception of the data */
  if (HAL_QSPI_Receive(hqspi, (uint8_t *)(&reg), HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* Enable write operations */
  if (QSPI_WriteEnable(hqspi) != QSPI_OK)
  {
    return QSPI_ERROR;
  }

  /* Update volatile configuration register (with new dummy cycles) */
  s_command.Instruction = WRITE_VOL_CFG_REG_CMD;
  MODIFY_REG(reg, 0xF0F0, ((MT25TL01G_DUMMY_CYCLES_READ_QUAD << 4) |
                               (MT25TL01G_DUMMY_CYCLES_READ_QUAD << 12)));

  /* Configure the write volatile configuration register command */
  if (HAL_QSPI_Command(hqspi, &s_command, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* Transmission of the data */
  if (HAL_QSPI_Transmit(hqspi, (uint8_t *)(&reg), HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  return QSPI_OK;
}

/**
  * @brief  This function send a Write Enable and wait it is effective.
  * @param  hqspi: QSPI handle
  * @retval None
  */
static uint8_t QSPI_WriteEnable(QSPI_HandleTypeDef *hqspi)
{
  QSPI_CommandTypeDef     s_command;
  QSPI_AutoPollingTypeDef s_config;

  /* Enable write operations */
  s_command.InstructionMode   = QSPI_INSTRUCTION_4_LINES;
  s_command.Instruction       = WRITE_ENABLE_CMD;
  s_command.AddressMode       = QSPI_ADDRESS_NONE;
  s_command.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
  s_command.DataMode          = QSPI_DATA_NONE;
  s_command.DummyCycles       = 0;
  s_command.DdrMode           = QSPI_DDR_MODE_DISABLE;
  s_command.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
  s_command.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;

  if (HAL_QSPI_Command(hqspi, &s_command, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  /* Configure automatic polling mode to wait for write enabling */
  s_config.Match           = MT25TL01G_SR_WREN | (MT25TL01G_SR_WREN << 8);
  s_config.Mask            = MT25TL01G_SR_WREN | (MT25TL01G_SR_WREN << 8);
  s_config.MatchMode       = QSPI_MATCH_MODE_AND;
  s_config.StatusBytesSize = 2;
  s_config.Interval        = 0x10;
  s_config.AutomaticStop   = QSPI_AUTOMATIC_STOP_ENABLE;

  s_command.Instruction    = READ_STATUS_REG_CMD;
  s_command.DataMode       = QSPI_DATA_4_LINES;

  if (HAL_QSPI_AutoPolling(hqspi, &s_command, &s_config, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  return QSPI_OK;
}

/**
  * @brief  This function read the SR of the memory and wait the EOP.
  * @param  hqspi QSPI handle
  * @param  Timeout Autopolling timeout
  * @retval None
  */
static uint8_t QSPI_AutoPollingMemReady(QSPI_HandleTypeDef *hqspi, uint32_t Timeout)
{
  QSPI_CommandTypeDef     s_command;
  QSPI_AutoPollingTypeDef s_config;

  /* Configure automatic polling mode to wait for memory ready */
  s_command.InstructionMode   = QSPI_INSTRUCTION_4_LINES;
  s_command.Instruction       = READ_STATUS_REG_CMD;
  s_command.AddressMode       = QSPI_ADDRESS_NONE;
  s_command.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
  s_command.DataMode          = QSPI_DATA_4_LINES;
  s_command.DummyCycles       = 2;
  s_command.DdrMode           = QSPI_DDR_MODE_DISABLE;
  s_command.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
  s_command.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;

  s_config.Match           = 0;
  s_config.MatchMode       = QSPI_MATCH_MODE_AND;
  s_config.Interval        = 0x10;
  s_config.AutomaticStop   = QSPI_AUTOMATIC_STOP_ENABLE;
  s_config.Mask            = MT25TL01G_SR_WIP | (MT25TL01G_SR_WIP <<8);
  s_config.StatusBytesSize = 2;

  if (HAL_QSPI_AutoPolling(hqspi, &s_command, &s_config, Timeout) != HAL_OK)
  {
    return QSPI_ERROR;
  }

  return QSPI_OK;
}

/**
  * @brief  This function enter the QPSI memory in QPI mode
  * @param  hqspi QSPI handle 
  * @retval QSPI status
  */
static uint8_t QSPI_EnterQPI(QSPI_HandleTypeDef *hqspi)
{
  QSPI_CommandTypeDef s_command;

  s_command.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
  s_command.Instruction       = ENTER_QUAD_CMD;
  s_command.AddressMode       = QSPI_ADDRESS_NONE;
  s_command.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
  s_command.DataMode          = QSPI_DATA_NONE;
  s_command.DummyCycles       = 0;
  s_command.DdrMode           = QSPI_DDR_MODE_DISABLE;
  s_command.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
  s_command.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;

  if (HAL_QSPI_Command(hqspi, &s_command, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
  {
    return QSPI_ERROR;
  }
  
  return QSPI_OK;
}

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/