Diff: BSP_DISCO_L476VG/stm32l476g_discovery_qspi.c

Revision:

1:d0dfbce63a89

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BSP_DISCO_L476VG/stm32l476g_discovery_qspi.c	Fri Feb 24 21:13:56 2017 +0000
@@ -0,0 +1,907 @@
+/**
+  ******************************************************************************
+  * @file    stm32l476g_discovery_qspi.c
+  * @author  MCD Application Team
+  * @version V1.0.0
+  * @date    26-June-2015
+  * @brief   This file includes a standard driver for the N25Q128A QSPI 
+  *          memory mounted on STM32L476G-Discovery board.
+  @verbatim
+  ==============================================================================
+                     ##### How to use this driver #####
+  ==============================================================================  
+  [..] 
+   (#) This driver is used to drive the N25Q128A QSPI external 
+       memory mounted on STM32L476G-DISCO evaluation board.
+       
+   (#) This driver need a specific component driver (N25Q128A) 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) 2015 STMicroelectronics</center></h2>
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 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, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l476g_discovery_qspi.h"
+
+/** @addtogroup BSP
+  * @{
+  */
+
+/** @addtogroup STM32L476G_DISCOVERY
+  * @{
+  */
+
+/** @defgroup STM32L476G_DISCOVERY_QSPI STM32L476G-DISCOVERY QSPI
+  * @{
+  */
+
+/* Private variables ---------------------------------------------------------*/
+
+/** @defgroup STM32L476G_DISCOVERY_QSPI_Private_Variables Private Variables
+  * @{
+  */
+QSPI_HandleTypeDef QSPIHandle;
+
+/**
+  * @}
+  */
+
+
+/* Private functions ---------------------------------------------------------*/
+
+/** @defgroup STM32L476G_DISCOVERY_QSPI_Private_Functions Private Functions
+  * @{
+  */
+static void    QSPI_MspInit            (void);
+static void    QSPI_MspDeInit          (void);
+static uint8_t QSPI_ResetMemory        (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);
+
+/**
+  * @}
+  */
+
+/* Exported functions ---------------------------------------------------------*/
+
+/** @addtogroup STM32L476G_DISCOVERY_QSPI_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 */
+  QSPI_MspInit();
+  
+  /* QSPI initialization */
+  QSPIHandle.Init.ClockPrescaler     = 0; /* Clock = Fahb = 80 MHz */
+  QSPIHandle.Init.FifoThreshold      = 4;
+  QSPIHandle.Init.SampleShifting     = QSPI_SAMPLE_SHIFTING_NONE;
+  QSPIHandle.Init.FlashSize          = POSITION_VAL(N25Q128A_FLASH_SIZE) - 1;
+  QSPIHandle.Init.ChipSelectHighTime = QSPI_CS_HIGH_TIME_1_CYCLE;
+  QSPIHandle.Init.ClockMode          = QSPI_CLOCK_MODE_0;
+
+  if (HAL_QSPI_Init(&QSPIHandle) != HAL_OK)
+  {
+    return QSPI_ERROR;
+  }
+
+  /* QSPI memory reset */
+  if (QSPI_ResetMemory(&QSPIHandle) != QSPI_OK)
+  {
+    return QSPI_NOT_SUPPORTED;
+  }
+ 
+  /* Configuration of the dummy cucles 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 */
+  QSPI_MspDeInit();
+
+    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 sCommand;
+
+  /* Initialize the read command */
+  sCommand.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
+  sCommand.Instruction       = QUAD_INOUT_FAST_READ_CMD;
+  sCommand.AddressMode       = QSPI_ADDRESS_4_LINES;
+  sCommand.AddressSize       = QSPI_ADDRESS_24_BITS;
+  sCommand.Address           = ReadAddr;
+  sCommand.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
+  sCommand.DataMode          = QSPI_DATA_4_LINES;
+  sCommand.DummyCycles       = N25Q128A_DUMMY_CYCLES_READ_QUAD;
+  sCommand.NbData            = Size;
+  sCommand.DdrMode           = QSPI_DDR_MODE_DISABLE;
+  sCommand.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
+  sCommand.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;
+  
+  /* Configure the command */
+  if (HAL_QSPI_Command(&QSPIHandle, &sCommand, 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 sCommand;
+  uint32_t end_addr, current_size, current_addr;
+
+  /* Calculation of the size between the write address and the end of the page */
+  current_addr = 0;
+
+  while (current_addr <= WriteAddr)
+  {
+    current_addr += N25Q128A_PAGE_SIZE;
+  }
+  current_size = current_addr - WriteAddr;
+
+  /* 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 adress variables */
+  current_addr = WriteAddr;
+  end_addr = WriteAddr + Size;
+
+  /* Initialize the program command */
+  sCommand.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
+  sCommand.Instruction       = EXT_QUAD_IN_FAST_PROG_CMD;
+  sCommand.AddressMode       = QSPI_ADDRESS_4_LINES;
+  sCommand.AddressSize       = QSPI_ADDRESS_24_BITS;
+  sCommand.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
+  sCommand.DataMode          = QSPI_DATA_4_LINES;
+  sCommand.DummyCycles       = 0;
+  sCommand.DdrMode           = QSPI_DDR_MODE_DISABLE;
+  sCommand.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
+  sCommand.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;
+  
+  /* Perform the write page by page */
+  do
+  {
+    sCommand.Address = current_addr;
+    sCommand.NbData  = current_size;
+
+    /* Enable write operations */
+    if (QSPI_WriteEnable(&QSPIHandle) != QSPI_OK)
+    {
+      return QSPI_ERROR;
+    }
+    
+    /* Configure the command */
+    if (HAL_QSPI_Command(&QSPIHandle, &sCommand, 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 + N25Q128A_PAGE_SIZE) > end_addr) ? (end_addr - current_addr) : N25Q128A_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 sCommand;
+
+  /* Initialize the erase command */
+  sCommand.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
+  sCommand.Instruction       = SUBSECTOR_ERASE_CMD;
+  sCommand.AddressMode       = QSPI_ADDRESS_1_LINE;
+  sCommand.AddressSize       = QSPI_ADDRESS_24_BITS;
+  sCommand.Address           = BlockAddress;
+  sCommand.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
+  sCommand.DataMode          = QSPI_DATA_NONE;
+  sCommand.DummyCycles       = 0;
+  sCommand.DdrMode           = QSPI_DDR_MODE_DISABLE;
+  sCommand.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
+  sCommand.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, &sCommand, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
+  {
+    return QSPI_ERROR;
+  }
+  
+  /* Configure automatic polling mode to wait for end of erase */  
+  if (QSPI_AutoPollingMemReady(&QSPIHandle, N25Q128A_SUBSECTOR_ERASE_MAX_TIME) != QSPI_OK)
+  {
+    return QSPI_ERROR;
+  }
+
+  return QSPI_OK;
+}
+
+/**
+  * @brief  Erases the specified sector of the QSPI memory. 
+  * @param  Sector: Sector address to erase (0 to 255) 
+  * @retval QSPI memory status
+  * @note This function is non blocking meaning that sector erase
+  *       operation is started but not completed when the function 
+  *       returns. Application has to call BSP_QSPI_GetStatus()
+  *       to know when the device is available again (i.e. erase operation
+  *       completed).
+  */
+uint8_t BSP_QSPI_Erase_Sector(uint32_t Sector)
+{
+  QSPI_CommandTypeDef sCommand;
+  
+  if (Sector >= (uint32_t)(N25Q128A_FLASH_SIZE/N25Q128A_SECTOR_SIZE))
+  {
+    return QSPI_ERROR;
+  }
+  
+  /* Initialize the erase command */
+  sCommand.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
+  sCommand.Instruction       = SECTOR_ERASE_CMD;
+  sCommand.AddressMode       = QSPI_ADDRESS_1_LINE;
+  sCommand.AddressSize       = QSPI_ADDRESS_24_BITS;
+  sCommand.Address           = (Sector * N25Q128A_SECTOR_SIZE);
+  sCommand.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
+  sCommand.DataMode          = QSPI_DATA_NONE;
+  sCommand.DummyCycles       = 0;
+  sCommand.DdrMode           = QSPI_DDR_MODE_DISABLE;
+  sCommand.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
+  sCommand.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, &sCommand, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_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 sCommand;
+
+  /* Initialize the erase command */
+  sCommand.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
+  sCommand.Instruction       = BULK_ERASE_CMD;
+  sCommand.AddressMode       = QSPI_ADDRESS_NONE;
+  sCommand.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
+  sCommand.DataMode          = QSPI_DATA_NONE;
+  sCommand.DummyCycles       = 0;
+  sCommand.DdrMode           = QSPI_DDR_MODE_DISABLE;
+  sCommand.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
+  sCommand.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, &sCommand, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
+  {
+    return QSPI_ERROR;
+  }
+  
+  /* Configure automatic polling mode to wait for end of erase */  
+  if (QSPI_AutoPollingMemReady(&QSPIHandle, N25Q128A_BULK_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 sCommand;
+  uint8_t reg;
+
+  /* Initialize the read flag status register command */
+  sCommand.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
+  sCommand.Instruction       = READ_FLAG_STATUS_REG_CMD;
+  sCommand.AddressMode       = QSPI_ADDRESS_NONE;
+  sCommand.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
+  sCommand.DataMode          = QSPI_DATA_1_LINE;
+  sCommand.DummyCycles       = 0;
+  sCommand.NbData            = 1;
+  sCommand.DdrMode           = QSPI_DDR_MODE_DISABLE;
+  sCommand.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
+  sCommand.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;
+
+  /* Configure the command */
+  if (HAL_QSPI_Command(&QSPIHandle, &sCommand, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
+  {
+    return QSPI_ERROR;
+  }
+
+  /* Reception of the data */
+  if (HAL_QSPI_Receive(&QSPIHandle, &reg, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
+  {
+    return QSPI_ERROR;
+  }
+  
+  /* Check the value of the register */
+  if ((reg & (N25Q128A_FSR_PRERR | N25Q128A_FSR_VPPERR | N25Q128A_FSR_PGERR | N25Q128A_FSR_ERERR)) != 0)
+  {
+    return QSPI_ERROR;
+  }
+  else if ((reg & (N25Q128A_FSR_PGSUS | N25Q128A_FSR_ERSUS)) != 0)
+  {
+    return QSPI_SUSPENDED;
+  }
+  else if ((reg & N25Q128A_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          = N25Q128A_FLASH_SIZE;
+  pInfo->EraseSectorSize    = N25Q128A_SUBSECTOR_SIZE;
+  pInfo->EraseSectorsNumber = (N25Q128A_FLASH_SIZE/N25Q128A_SUBSECTOR_SIZE);
+  pInfo->ProgPageSize       = N25Q128A_PAGE_SIZE;
+  pInfo->ProgPagesNumber    = (N25Q128A_FLASH_SIZE/N25Q128A_PAGE_SIZE);
+  
+  return QSPI_OK;
+}
+
+/**
+  * @brief  Configure the QSPI in memory-mapped mode
+  * @retval QSPI memory status
+  */
+uint8_t BSP_QSPI_EnableMemoryMappedMode(void)
+{
+  QSPI_CommandTypeDef      sCommand;
+  QSPI_MemoryMappedTypeDef sMemMappedCfg;
+
+  /* Configure the command for the read instruction */
+  sCommand.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
+  sCommand.Instruction       = QUAD_INOUT_FAST_READ_CMD;
+  sCommand.AddressMode       = QSPI_ADDRESS_4_LINES;
+  sCommand.AddressSize       = QSPI_ADDRESS_24_BITS;
+  sCommand.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
+  sCommand.DataMode          = QSPI_DATA_4_LINES;
+  sCommand.DummyCycles       = N25Q128A_DUMMY_CYCLES_READ_QUAD;
+  sCommand.DdrMode           = QSPI_DDR_MODE_DISABLE;
+  sCommand.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
+  sCommand.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;
+  
+  /* Configure the memory mapped mode */
+  sMemMappedCfg.TimeOutActivation = QSPI_TIMEOUT_COUNTER_ENABLE;
+  sMemMappedCfg.TimeOutPeriod     = 4; /* 50 ns (4 periods of a 80 MHz clock) */
+  
+  if (HAL_QSPI_MemoryMapped(&QSPIHandle, &sCommand, &sMemMappedCfg) != HAL_OK)
+  {
+    return QSPI_ERROR;
+  }
+
+  return QSPI_OK;
+}
+
+/**
+  * @brief  This function suspends an ongoing erase command.
+  * @retval QSPI memory status
+  */
+uint8_t BSP_QSPI_SuspendErase(void)
+{
+  QSPI_CommandTypeDef sCommand;
+  
+  /* Check whether the device is busy (erase operation is 
+  in progress).
+  */
+  if (BSP_QSPI_GetStatus() == QSPI_BUSY)
+  {
+    /* Initialize the erase command */
+    sCommand.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
+    sCommand.Instruction       = PROG_ERASE_SUSPEND_CMD;
+    sCommand.AddressMode       = QSPI_ADDRESS_NONE;
+    sCommand.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
+    sCommand.DataMode          = QSPI_DATA_NONE;
+    sCommand.DummyCycles       = 0;
+    sCommand.DdrMode           = QSPI_DDR_MODE_DISABLE;
+    sCommand.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
+    sCommand.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, &sCommand, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
+    {
+      return QSPI_ERROR;
+    }
+    
+    if (BSP_QSPI_GetStatus() == QSPI_SUSPENDED)
+    {
+      return QSPI_OK;
+    }
+    
+    return QSPI_ERROR;
+  }
+  
+  return QSPI_OK;
+}
+
+/**
+  * @brief  This function resumes a paused erase command.
+  * @retval QSPI memory status
+  */
+uint8_t BSP_QSPI_ResumeErase(void)
+{
+  QSPI_CommandTypeDef sCommand;
+  
+  /* Check whether the device is in suspended state */
+  if (BSP_QSPI_GetStatus() == QSPI_SUSPENDED)
+  {
+    /* Initialize the erase command */
+    sCommand.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
+    sCommand.Instruction       = PROG_ERASE_RESUME_CMD;
+    sCommand.AddressMode       = QSPI_ADDRESS_NONE;
+    sCommand.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
+    sCommand.DataMode          = QSPI_DATA_NONE;
+    sCommand.DummyCycles       = 0;
+    sCommand.DdrMode           = QSPI_DDR_MODE_DISABLE;
+    sCommand.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
+    sCommand.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, &sCommand, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
+    {
+      return QSPI_ERROR;
+    }
+    
+    /*
+    When this command is executed, the status register write in progress bit is set to 1, and
+    the flag status register program erase controller bit is set to 0. This command is ignored
+    if the device is not in a suspended state.
+    */
+    
+    if (BSP_QSPI_GetStatus() == QSPI_BUSY)
+    {
+      return QSPI_OK;
+    }
+    
+    return QSPI_ERROR;
+  }
+
+  return QSPI_OK;
+}
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32L476G_DISCOVERY_QSPI_Private_Functions 
+  * @{
+  */
+
+/**
+  * @brief  Initializes the QSPI MSP.
+  * @retval None
+  */
+static void QSPI_MspInit(void)
+{
+  GPIO_InitTypeDef GPIO_InitStruct;
+
+  /* Enable the QuadSPI memory interface clock */
+  __HAL_RCC_QSPI_CLK_ENABLE();
+
+  /* Reset the QuadSPI memory interface */
+  __HAL_RCC_QSPI_FORCE_RESET();
+  __HAL_RCC_QSPI_RELEASE_RESET();
+
+  /* Enable GPIO clocks */
+  __HAL_RCC_GPIOE_CLK_ENABLE();
+
+  /* QSPI CS GPIO pin configuration  */
+  GPIO_InitStruct.Pin       = GPIO_PIN_11;
+  GPIO_InitStruct.Mode      = GPIO_MODE_AF_PP;
+  GPIO_InitStruct.Pull      = GPIO_PULLUP;
+  GPIO_InitStruct.Speed     = GPIO_SPEED_HIGH;
+  GPIO_InitStruct.Alternate = GPIO_AF10_QUADSPI;
+  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
+
+  /* QSPI CLK, D0, D1, D2 and D3 GPIO pins configuration  */
+  GPIO_InitStruct.Pin       = (GPIO_PIN_10 | GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15);
+  GPIO_InitStruct.Pull      = GPIO_NOPULL;
+  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
+}
+
+/**
+  * @brief  De-Initializes the QSPI MSP.
+  * @retval None
+  */
+static void QSPI_MspDeInit(void)
+{
+  GPIO_InitTypeDef GPIO_InitStruct;
+
+  /* QSPI CLK, CS, PE10 - PE15 GPIO pins de-configuration  */
+
+   __HAL_RCC_GPIOE_CLK_ENABLE();
+      HAL_GPIO_DeInit(GPIOE, (GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15));
+  /* Set GPIOE pin 11 in pull up mode (optimum default setting) */
+  GPIO_InitStruct.Mode      = GPIO_MODE_INPUT;
+  GPIO_InitStruct.Pin       = GPIO_PIN_11;
+  GPIO_InitStruct.Pull      = GPIO_NOPULL;
+  GPIO_InitStruct.Speed     = GPIO_SPEED_LOW;
+  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct); 
+  
+  /* Set GPIOE pin 10 in no pull, low state (optimum default setting) */
+  GPIO_InitStruct.Mode      = GPIO_MODE_OUTPUT_PP  ;
+  GPIO_InitStruct.Pull      = GPIO_NOPULL;
+  GPIO_InitStruct.Pin       = (GPIO_PIN_10);
+  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
+  HAL_GPIO_WritePin(GPIOE, GPIO_PIN_10, GPIO_PIN_RESET);
+   
+  /* Reset the QuadSPI memory interface */
+  __HAL_RCC_QSPI_FORCE_RESET();
+  __HAL_RCC_QSPI_RELEASE_RESET();
+
+  /* Disable the QuadSPI memory interface clock */
+  __HAL_RCC_QSPI_CLK_DISABLE();
+}
+
+/**
+  * @brief  This function reset the QSPI memory.
+  * @param  hqspi: QSPI handle
+  * @retval None
+  */
+static uint8_t QSPI_ResetMemory(QSPI_HandleTypeDef *hqspi)
+{
+  QSPI_CommandTypeDef sCommand;
+
+  /* Initialize the reset enable command */
+  sCommand.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
+  sCommand.Instruction       = RESET_ENABLE_CMD;
+  sCommand.AddressMode       = QSPI_ADDRESS_NONE;
+  sCommand.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
+  sCommand.DataMode          = QSPI_DATA_NONE;
+  sCommand.DummyCycles       = 0;
+  sCommand.DdrMode           = QSPI_DDR_MODE_DISABLE;
+  sCommand.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
+  sCommand.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;
+
+  /* Send the command */
+  if (HAL_QSPI_Command(&QSPIHandle, &sCommand, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
+  {
+    return QSPI_ERROR;
+  }
+
+  /* Send the reset memory command */
+  sCommand.Instruction = RESET_MEMORY_CMD;
+  if (HAL_QSPI_Command(&QSPIHandle, &sCommand, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
+  {
+    return QSPI_ERROR;
+  }
+
+  /* Configure automatic polling mode to wait the memory is ready */  
+  if (QSPI_AutoPollingMemReady(&QSPIHandle, 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 sCommand;
+  uint8_t reg;
+
+  /* Initialize the read volatile configuration register command */
+  sCommand.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
+  sCommand.Instruction       = READ_VOL_CFG_REG_CMD;
+  sCommand.AddressMode       = QSPI_ADDRESS_NONE;
+  sCommand.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
+  sCommand.DataMode          = QSPI_DATA_1_LINE;
+  sCommand.DummyCycles       = 0;
+  sCommand.NbData            = 1;
+  sCommand.DdrMode           = QSPI_DDR_MODE_DISABLE;
+  sCommand.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
+  sCommand.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;
+
+  /* Configure the command */
+  if (HAL_QSPI_Command(&QSPIHandle, &sCommand, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
+  {
+    return QSPI_ERROR;
+  }
+
+  /* Reception of the data */
+  if (HAL_QSPI_Receive(&QSPIHandle, &reg, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
+  {
+    return QSPI_ERROR;
+  }
+
+  /* Enable write operations */
+  if (QSPI_WriteEnable(&QSPIHandle) != QSPI_OK)
+  {
+    return QSPI_ERROR;
+  }
+
+  /* Update volatile configuration register (with new dummy cycles) */  
+  sCommand.Instruction = WRITE_VOL_CFG_REG_CMD;
+  MODIFY_REG(reg, N25Q128A_VCR_NB_DUMMY, (N25Q128A_DUMMY_CYCLES_READ_QUAD << POSITION_VAL(N25Q128A_VCR_NB_DUMMY)));
+      
+  /* Configure the write volatile configuration register command */
+  if (HAL_QSPI_Command(&QSPIHandle, &sCommand, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
+  {
+    return QSPI_ERROR;
+  }
+
+  /* Transmission of the data */
+  if (HAL_QSPI_Transmit(&QSPIHandle, &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     sCommand;
+  QSPI_AutoPollingTypeDef sConfig;
+
+  /* Enable write operations */
+  sCommand.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
+  sCommand.Instruction       = WRITE_ENABLE_CMD;
+  sCommand.AddressMode       = QSPI_ADDRESS_NONE;
+  sCommand.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
+  sCommand.DataMode          = QSPI_DATA_NONE;
+  sCommand.DummyCycles       = 0;
+  sCommand.DdrMode           = QSPI_DDR_MODE_DISABLE;
+  sCommand.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
+  sCommand.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;
+
+  if (HAL_QSPI_Command(&QSPIHandle, &sCommand, HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
+  {
+    return QSPI_ERROR;
+  }
+  
+  /* Configure automatic polling mode to wait for write enabling */  
+  sConfig.Match           = N25Q128A_SR_WREN;
+  sConfig.Mask            = N25Q128A_SR_WREN;
+  sConfig.MatchMode       = QSPI_MATCH_MODE_AND;
+  sConfig.StatusBytesSize = 1;
+  sConfig.Interval        = 0x10;
+  sConfig.AutomaticStop   = QSPI_AUTOMATIC_STOP_ENABLE;
+
+  sCommand.Instruction    = READ_STATUS_REG_CMD;
+  sCommand.DataMode       = QSPI_DATA_1_LINE;
+
+  if (HAL_QSPI_AutoPolling(&QSPIHandle, &sCommand, &sConfig, 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: Timeout for auto-polling
+  * @retval None
+  */
+static uint8_t QSPI_AutoPollingMemReady(QSPI_HandleTypeDef *hqspi, uint32_t Timeout)
+{
+  QSPI_CommandTypeDef     sCommand;
+  QSPI_AutoPollingTypeDef sConfig;
+
+  /* Configure automatic polling mode to wait for memory ready */  
+  sCommand.InstructionMode   = QSPI_INSTRUCTION_1_LINE;
+  sCommand.Instruction       = READ_STATUS_REG_CMD;
+  sCommand.AddressMode       = QSPI_ADDRESS_NONE;
+  sCommand.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
+  sCommand.DataMode          = QSPI_DATA_1_LINE;
+  sCommand.DummyCycles       = 0;
+  sCommand.DdrMode           = QSPI_DDR_MODE_DISABLE;
+  sCommand.DdrHoldHalfCycle  = QSPI_DDR_HHC_ANALOG_DELAY;
+  sCommand.SIOOMode          = QSPI_SIOO_INST_EVERY_CMD;
+
+  sConfig.Match           = 0;
+  sConfig.Mask            = N25Q128A_SR_WIP;
+  sConfig.MatchMode       = QSPI_MATCH_MODE_AND;
+  sConfig.StatusBytesSize = 1;
+  sConfig.Interval        = 0x10;
+  sConfig.AutomaticStop   = QSPI_AUTOMATIC_STOP_ENABLE;
+
+  if (HAL_QSPI_AutoPolling(&QSPIHandle, &sCommand, &sConfig, Timeout) != HAL_OK)
+  {
+    return QSPI_ERROR;
+  }
+
+  return QSPI_OK;
+}
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+