Diff: targets/cmsis/TARGET_STM/TARGET_NUCLEO_L053R8/stm32l0xx_hal_flash.c

Revision:

181:a4cbdfbbd2f4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/cmsis/TARGET_STM/TARGET_NUCLEO_L053R8/stm32l0xx_hal_flash.c	Wed May 07 13:15:08 2014 +0100
@@ -0,0 +1,710 @@
+/**
+  ******************************************************************************
+  * @file    stm32l0xx_hal_flash.c
+  * @author  MCD Application Team
+  * @version V1.0.0
+  * @date    22-April-2014
+  * @brief   FLASH HAL module driver.
+  *          This file provides firmware functions to manage the following 
+  *          functionalities of the internal FLASH memory:
+  *            + FLASH Interface configuration
+  *            + FLASH Memory Programming
+  *            + DATA EEPROM Programming
+  *            + Option Bytes Programming
+  *            + Interrupts and flags management
+  *
+  *  @verbatim
+
+  ==============================================================================
+                        ##### FLASH peripheral features #####
+  ==============================================================================
+           
+  [..] The Flash memory interface manages CPU accesses to the Flash memory. 
+       It implements the erase and program Flash memory operations 
+       and the read and write protection mechanisms.
+
+  [..] The FLASH main features are:
+      (+) Flash memory read operations
+      (+) Flash memory program/erase operations
+      (+) Read / write protections
+      (+) Option Bytes programming
+           
+                     ##### How to use this driver #####
+  ==============================================================================
+    [..]                             
+      This driver provides functions and macros to configure and program the FLASH 
+      memory of all STM32L0xx devices.
+    
+      (#) FLASH Memory IO Programming functions: 
+           (++) Lock and Unlock the FLASH interface using HAL_FLASH_Unlock() and 
+                HAL_FLASH_Lock() functions
+           (++) Program functions: byte, half word and word 
+           (++) There Two modes of programming :
+                (+++) Polling mode using HAL_FLASH_Program() function
+                (+++) Interrupt mode using HAL_FLASH_Program_IT() function
+    
+      (#) Interrupts and flags management functions : 
+           (++) Handle FLASH interrupts by calling HAL_FLASH_IRQHandler()
+           (++) Wait for last FLASH operation according to its status
+           (++) Get error flag status by calling HAL_GetErrorCode()          
+
+    [..] 
+      In addition to these functions, this driver includes a set of macros allowing
+      to handle the following operations:
+       (+) Set the latency
+       (+) Enable/Disable the prefetch buffer
+       (+) Enable/Disable the preread buffer
+       (+) Enable/Disable the Flash power-down
+       (+) Enable/Disable the FLASH interrupts
+       (+) Monitor the FLASH flags status
+
+ ===============================================================================
+                  ##### Programming operation functions #####
+ ===============================================================================  
+    [..]
+    This subsection provides a set of functions allowing to manage the FLASH 
+    program operations.
+
+   [..] The FLASH Memory Programming functions, includes the following functions:
+    (+) HAL_FLASH_Unlock(void);
+    (+) HAL_FLASH_Lock(void);
+    (+) HAL_FLASH_Program(uint32_t TypeProgram, uint32_t Address, uint32_t Data)
+    (+) HAL_FLASH_Program_IT(uint32_t TypeProgram, uint32_t Address, uint32_t Data)
+   
+    [..] Any operation of erase or program should follow these steps:
+    (#) Call the HAL_FLASH_Unlock() function to enable the flash control register and 
+        program memory access.
+    (#) Call the desired function to erase page or program data.
+    (#) Call the HAL_FLASH_Lock() to disable the flash program memory access 
+       (recommended to protect the FLASH memory against possible unwanted operation).
+
+  ==============================================================================
+                ##### Option Bytes Programming functions ##### 
+  ==============================================================================  
+
+    [..] The FLASH_Option Bytes Programming_functions, includes the following functions:
+    (+) HAL_FLASH_OB_Unlock(void);
+    (+) HAL_FLASH_OB_Lock(void);
+    (+) HAL_FLASH_OB_Launch(void);
+    (+) HAL_FLASHEx_OBProgram(FLASH_OBProgramInitTypeDef *pOBInit);
+    (+) HAL_FLASHEx_OBGetConfig(FLASH_OBProgramInitTypeDef *pOBInit);
+   
+    [..] Any operation of erase or program should follow these steps:
+    (#) Call the HAL_FLASH_OB_Unlock() function to enable the Flash option control 
+        register access.
+    (#) Call the following functions to program the desired option bytes.
+        (++) HAL_FLASHEx_OBProgram(FLASH_OBProgramInitTypeDef *pOBInit);      
+    (#) Once all needed option bytes to be programmed are correctly written, call the
+        HAL_FLASH_OB_Launch(void) function to launch the Option Bytes programming process.
+    (#) Call the HAL_FLASH_OB_Lock() to disable the Flash option control register access (recommended
+        to protect the option Bytes against possible unwanted operations).
+
+    [..] Proprietary code Read Out Protection (PcROP):    
+    (#) The PcROP sector is selected by using the same option bytes as the Write
+        protection (nWRPi bits). As a result, these 2 options are exclusive each other.
+    (#) In order to activate the PcROP (change the function of the nWRPi option bits), 
+        the SPRMOD option bit must be activated.
+    (#) The active value of nWRPi bits is inverted when PCROP mode is active, this
+        means: if SPRMOD = 1 and nWRPi = 1 (default value), then the user page "i"
+        is read/write protected.
+    (#) To activate PCROP mode for Flash page(s), you need to follow the sequence below:
+        (++) For page(s) within the first 64KB of the Flash, use this function 
+             HAL_FLASHEx_AdvOBProgram with PCROPState = PCROPSTATE_ENABLE.
+
+
+  *  @endverbatim
+  *                      
+ ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2014 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 "stm32l0xx_hal.h"
+
+/** @addtogroup STM32L0xx_HAL_Driver
+  * @{
+  */
+
+/** @defgroup FLASH 
+  * @brief FLASH driver modules
+  * @{
+  */ 
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+#define HAL_FLASH_TIMEOUT_VALUE   ((uint32_t)0xFFFF0)
+    
+/* FLASH Mask */
+#define WRP01_MASK                 ((uint32_t)0x0000FFFF)
+#define PAGESIZE                   ((uint32_t)0x00000080)
+    
+/* Private macro -------------------------------------------------------------*/
+/*Variables used for Erase sectors under interruption*/
+FLASH_ProcessTypeDef pFlash;
+
+/* Private function prototypes -----------------------------------------------*/
+static void FLASH_Program_Word(uint32_t Address, uint32_t Data);
+HAL_StatusTypeDef FLASH_WaitForLastOperation(uint32_t Timeout);
+static void FLASH_SetErrorCode(void);
+static HAL_StatusTypeDef DATA_EEPROM_Unlock(void);
+
+/* Private functions ---------------------------------------------------------*/
+ 
+/** @defgroup FLASH_Private_Functions
+  * @{
+  */ 
+
+/** @defgroup FLASH_Group1 Programming operation functions 
+ *  @brief   Programming operation functions 
+ *
+@verbatim   
+@endverbatim
+  * @{
+  */
+/**
+  * @brief  Program word at a specified address
+  * @param  TypeProgram:  Indicate the way to program at a specified address.
+  *                           This parameter can be a value of @ref FLASH_Type_Program
+  * @param  Address:  specifies the address to be programmed.
+  * @param  Data: specifies the data to be programmed
+  * 
+  * @retval HAL_StatusTypeDef HAL Status
+  */
+HAL_StatusTypeDef HAL_FLASH_Program(uint32_t TypeProgram, uint32_t Address, uint32_t Data)
+{
+  HAL_StatusTypeDef status = HAL_ERROR;
+  
+  /* Process Locked */
+  __HAL_LOCK(&pFlash);
+
+  /* Check the parameters */
+  assert_param(IS_TYPEPROGRAM(TypeProgram));
+
+  /* Wait for last operation to be completed */
+  status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);
+  
+  if(status == HAL_OK)
+  {
+    if(TypeProgram == TYPEPROGRAM_WORD)
+    {
+      /*Program word (32-bit) at a specified address.*/
+      FLASH_Program_Word(Address, (uint32_t) Data);
+    }
+    /* Wait for last operation to be completed */
+    status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);
+    
+    /* Reset PROG bit */
+    FLASH->PECR &= ~FLASH_PECR_PROG;
+  }
+
+  /* Process Unlocked */
+  __HAL_UNLOCK(&pFlash);
+
+  return status;  
+}
+
+/**
+  * @brief   Program word at a specified address  with interrupt enabled.
+  * @param  TypeProgram:  Indicate the way to program at a specified address.
+  *                           This parameter can be a value of @ref FLASH_Type_Program
+  * @param  Address:  specifies the address to be programmed.
+  * @param  Data: specifies the data to be programmed
+  * 
+  * @retval HAL_StatusTypeDef HAL Status
+  */
+HAL_StatusTypeDef HAL_FLASH_Program_IT(uint32_t TypeProgram, uint32_t Address, uint32_t Data)
+{
+  HAL_StatusTypeDef status = HAL_OK;
+  
+  /* Process Locked */
+  __HAL_LOCK(&pFlash);
+
+  /* Check the parameters */
+  assert_param(IS_TYPEPROGRAM(TypeProgram));
+
+  /* Enable End of FLASH Operation interrupt */
+  __HAL_FLASH_ENABLE_IT(FLASH_IT_EOP);
+  
+  /* Enable Error source interrupt */
+  __HAL_FLASH_ENABLE_IT(FLASH_IT_ERR);
+  
+  /* Clear pending flags (if any) */  
+  __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP    | FLASH_FLAG_ENDHV | FLASH_FLAG_WRPERR |\
+                         FLASH_FLAG_PGAERR | FLASH_FLAG_SIZERR| FLASH_FLAG_OPTVERR |\
+                         FLASH_FLAG_RDERR  | FLASH_FLAG_NOTZEROERR);  
+
+  pFlash.ProcedureOnGoing = FLASH_PROC_PROGRAM;
+  pFlash.Address = Address;
+
+  if(TypeProgram == TYPEPROGRAM_WORD)
+  {
+    /*Program word (32-bit) at a specified address.*/
+    FLASH_Program_Word(Address, (uint32_t) Data);
+  }
+  
+  /* Process Unlocked */
+  __HAL_UNLOCK(&pFlash);
+  
+  return status;
+}
+
+/**
+  * @brief This function handles FLASH interrupt request.
+  * @param  None
+  * @retval None
+  */
+void HAL_FLASH_IRQHandler(void)
+{
+  uint32_t temp;
+  
+  /* If the program operation is completed, disable the PROG Bit */
+  FLASH->PECR &= (~FLASH_PECR_PROG);
+
+  /* If the erase operation is completed, disable the ERASE Bit */
+  FLASH->PECR &= (~FLASH_PECR_ERASE);
+
+  /* Check FLASH End of Operation flag  */
+  if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_EOP))
+  {
+    if(pFlash.ProcedureOnGoing == FLASH_PROC_PAGEERASE)
+    {
+      /*Nb of sector to erased can be decreased*/
+      pFlash.NbPagesToErase--;
+
+      /* Check if there are still sectors to erase*/
+      if(pFlash.NbPagesToErase != 0)
+      {
+        temp = pFlash.Page;
+        /*Indicate user which sector has been erased*/
+        HAL_FLASH_EndOfOperationCallback(temp);
+
+        /* Clear pending flags (if any) */  
+        __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP    | FLASH_FLAG_ENDHV | FLASH_FLAG_WRPERR |\
+                              FLASH_FLAG_PGAERR | FLASH_FLAG_SIZERR| FLASH_FLAG_OPTVERR |\
+                              FLASH_FLAG_RDERR  | FLASH_FLAG_NOTZEROERR);  
+
+        /*Increment sector number*/
+        temp = pFlash.Page + PAGESIZE;
+        pFlash.Page = pFlash.Page + PAGESIZE;
+        FLASH_Erase_Page(temp);
+      }
+      else
+      {
+        /*No more sectors to Erase, user callback can be called.*/
+        /*Reset Sector and stop Erase sectors procedure*/
+        pFlash.Page = temp = 0xFFFFFFFF;
+        pFlash.ProcedureOnGoing = FLASH_PROC_NONE;
+        /* FLASH EOP interrupt user callback */
+        HAL_FLASH_EndOfOperationCallback(temp);
+        /* Clear FLASH End of Operation pending bit */
+        __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP);
+      }
+    }
+    else 
+    {
+      if(pFlash.ProcedureOnGoing  == FLASH_PROC_PROGRAM)
+      {
+        /*Program ended. Return the selected address*/
+        /* FLASH EOP interrupt user callback */
+        HAL_FLASH_EndOfOperationCallback(pFlash.Address);
+      }
+      pFlash.ProcedureOnGoing = FLASH_PROC_NONE;
+      /* Clear FLASH End of Operation pending bit */
+      __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP);
+    }
+
+  }
+  /* Check FLASH operation error flags */
+  if(__HAL_FLASH_GET_FLAG((FLASH_FLAG_EOP    | FLASH_FLAG_ENDHV | FLASH_FLAG_WRPERR |\
+                              FLASH_FLAG_PGAERR | FLASH_FLAG_SIZERR| FLASH_FLAG_OPTVERR |\
+                              FLASH_FLAG_RDERR  | FLASH_FLAG_NOTZEROERR)))
+  {
+    if(pFlash.ProcedureOnGoing == FLASH_PROC_PAGEERASE)
+    {
+      /*return the faulty sector*/
+      temp = pFlash.Page;
+      pFlash.Page = 0xFFFFFFFF;
+    }
+    else
+    {
+      /*retrun the faulty address*/
+      temp = pFlash.Address;
+    }
+    
+    /*Save the Error code*/
+    FLASH_SetErrorCode();
+
+    /* FLASH error interrupt user callback */
+    HAL_FLASH_OperationErrorCallback(temp);
+    /* Clear FLASH error pending bits */
+    __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP    | FLASH_FLAG_ENDHV | FLASH_FLAG_WRPERR |\
+                           FLASH_FLAG_PGAERR | FLASH_FLAG_SIZERR| FLASH_FLAG_OPTVERR |\
+                           FLASH_FLAG_RDERR  | FLASH_FLAG_NOTZEROERR);
+
+    /*Stop the procedure ongoing*/
+    pFlash.ProcedureOnGoing = FLASH_PROC_NONE;
+  }
+  
+  if(pFlash.ProcedureOnGoing == FLASH_PROC_NONE)
+  {
+    /* Disable End of FLASH Operation interrupt */
+    __HAL_FLASH_DISABLE_IT(FLASH_IT_EOP);
+
+    /* Disable Error source interrupt */
+    __HAL_FLASH_DISABLE_IT(FLASH_IT_ERR);
+
+    /* Process Unlocked */
+    __HAL_UNLOCK(&pFlash);
+  }
+    
+} 
+
+/**
+  * @brief  FLASH end of operation interrupt callback
+  * @param  ReturnValue: The value saved in this parameter depends on the ongoing procedure
+  *                 - Pages Erase: Sector which has been erased 
+  *                    (if 0xFFFFFFFF, it means that all the selected sectors have been erased)
+  *                 - Program: Address which was selected for data program
+  * @retval none
+  */
+__weak void HAL_FLASH_EndOfOperationCallback(uint32_t ReturnValue)
+{
+  /* NOTE : This function Should not be modified, when the callback is needed,
+            the HAL_FLASH_EndOfOperationCallback could be implemented in the user file
+   */ 
+}
+
+/**
+  * @brief  FLASH operation error interrupt callback
+  * @param  ReturnValue: The value saved in this parameter depends on the ongoing procedure
+  *                 - Pagess Erase: Sector number which returned an error
+  *                 - Program: Address which was selected for data program
+  * @retval none
+  */
+__weak void HAL_FLASH_OperationErrorCallback(uint32_t ReturnValue)
+{
+  /* NOTE : This function Should not be modified, when the callback is needed,
+            the HAL_FLASH_OperationErrorCallback could be implemented in the user file
+   */ 
+}
+
+/**
+  * @}
+  */
+
+/** @defgroup FLASH_Group2 Peripheral Control functions 
+ *  @brief   management functions 
+ *
+@verbatim   
+ ===============================================================================
+                      ##### Peripheral Control functions #####
+ ===============================================================================  
+    [..]
+    This subsection provides a set of functions allowing to control the FLASH 
+    memory operations.
+
+@endverbatim
+  * @{
+  */  
+/**
+  * @brief  Unlock the FLASH control register access
+  * @param  None
+  * @retval HAL_StatusTypeDef HAL Status
+  */
+HAL_StatusTypeDef HAL_FLASH_Unlock(void)  
+{
+  if((FLASH->PECR & FLASH_PECR_PRGLOCK) != RESET)
+  {
+    /* Unlocking the data memory and FLASH_PECR register access */
+    DATA_EEPROM_Unlock();
+  
+    /* Unlocking the program memory access */
+    FLASH->PRGKEYR = FLASH_PRGKEY1;
+    FLASH->PRGKEYR = FLASH_PRGKEY2;  
+  }
+  else
+  {
+    return HAL_ERROR;
+  }
+  
+  return HAL_OK; 
+}
+
+/**
+  * @brief  Locks the FLASH control register access
+  * @param  None
+  * @retval HAL_StatusTypeDef HAL Status
+  */
+HAL_StatusTypeDef HAL_FLASH_Lock(void)
+{
+  /* Set the PRGLOCK Bit to lock the program memory access */
+  FLASH->PECR |= FLASH_PECR_PRGLOCK;
+  
+  return HAL_OK;
+}
+
+/**
+  * @brief  Unlock the FLASH Option Control Registers access.
+  * @param  None
+  * @retval HAL_StatusTypeDef HAL Status
+  */
+HAL_StatusTypeDef HAL_FLASH_OB_Unlock(void)
+{
+  if((FLASH->PECR & FLASH_PECR_OPTLOCK) != RESET)
+  {
+    /* Unlocking the data memory and FLASH_PECR register access */
+    DATA_EEPROM_Unlock();
+  
+    /* Unlocking the option bytes block access */
+    FLASH->OPTKEYR = FLASH_OPTKEY1;
+    FLASH->OPTKEYR = FLASH_OPTKEY2;
+  }
+  else
+  {
+    return HAL_ERROR;
+  }  
+  
+  return HAL_OK;
+}
+
+/**
+  * @brief  Lock the FLASH Option Control Registers access.
+  * @param  None
+  * @retval HAL_StatusTypeDef HAL Status 
+  */
+HAL_StatusTypeDef HAL_FLASH_OB_Lock(void)
+{
+  /* Set the OPTLOCK Bit to lock the option bytes block access */
+  FLASH->PECR |= FLASH_PECR_OPTLOCK;
+
+  return HAL_OK;  
+}
+
+/**
+  * @brief  Launch the option byte loading.
+  * @param  None
+  * @retval HAL_StatusTypeDef HAL Status
+  */
+HAL_StatusTypeDef HAL_FLASH_OB_Launch(void)
+{
+  /* Set the OBL_Launch bit to lauch the option byte loading */
+  FLASH->PECR |= FLASH_PECR_OBL_LAUNCH;
+  
+  /* Wait for last operation to be completed */
+  return(FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE));  
+}
+
+/**
+  * @brief  Unlocks the data memory and FLASH_PECR register access.
+  * @param  None
+  * @retval HAL_StatusTypeDef HAL Status
+  */
+static HAL_StatusTypeDef DATA_EEPROM_Unlock(void)
+{
+  if((FLASH->PECR & FLASH_PECR_PELOCK) != RESET)
+  {  
+    /* Unlocking the Data memory and FLASH_PECR register access*/
+    FLASH->PEKEYR = FLASH_PEKEY1;
+    FLASH->PEKEYR = FLASH_PEKEY2;
+  }
+  else
+  {
+    return HAL_ERROR;
+  }
+  return HAL_OK;  
+}
+
+/**
+  * @}
+  */
+
+/** @defgroup FLASH_Group3 Peripheral State and Errors functions 
+ *  @brief   Peripheral Errors functions 
+ *
+@verbatim   
+ ===============================================================================
+                ##### Peripheral Errors functions #####
+ ===============================================================================  
+    [..]
+    This subsection permit to get in run-time Errors of the FLASH peripheral.
+
+@endverbatim
+  * @{
+  */
+
+/**
+  * @brief  Get the specific FLASH error flag.
+  * @param  None
+  * @retval FLASH_ErrorCode: The returned value can be:
+  *            @arg FLASH_ERROR_RD: FLASH Read Protection error flag (PCROP)
+  *            @arg FLASH_ERROR_ENDHV: FLASH Programming Sequence error flag 
+  *            @arg FLASH_ERROR_SIZE: FLASH Programming Parallelism error flag  
+  *            @arg FLASH_ERROR_PGA: FLASH Programming Alignment error flag
+  *            @arg FLASH_ERROR_WRP: FLASH Write protected error flag
+  *            @arg FLASH_ERROR_OPTV: FLASH Option valid error flag 
+  *            @arg FLASH_ERROR_NOTZERO: FLASH write operation is done in a not-erased region 
+  */
+FLASH_ErrorTypeDef HAL_FLASH_GetError(void)
+{ 
+   return pFlash.ErrorCode;
+}  
+
+/**
+  * @brief  Wait for a FLASH operation to complete.
+  * @param  Timeout: maximum flash operationtimeout
+  * @retval HAL_StatusTypeDef HAL Status
+  */
+HAL_StatusTypeDef FLASH_WaitForLastOperation(uint32_t Timeout)
+{
+  uint32_t tickstart = 0;
+
+  /* Wait for the FLASH operation to complete by polling on BUSY flag to be reset.
+     Even if the FLASH operation fails, the BUSY flag will be reset and an error
+     flag will be set */
+    
+  tickstart = HAL_GetTick();
+     
+  while(__HAL_FLASH_GET_FLAG(FLASH_FLAG_BSY)) 
+  { 
+    if(Timeout != HAL_MAX_DELAY)
+    {
+      if((HAL_GetTick() - tickstart ) > Timeout)
+      {
+        return HAL_TIMEOUT;
+      }
+    } 
+  }
+  
+  if(__HAL_FLASH_GET_FLAG((FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_SIZERR | FLASH_FLAG_OPTVERR |\
+                           FLASH_FLAG_RDERR | FLASH_FLAG_NOTZEROERR)))
+  {
+    /*Save the error code*/
+    FLASH_SetErrorCode();
+    return HAL_ERROR;
+  }
+
+  /* If there is an error flag set */
+  return HAL_OK;  
+}
+
+/**
+  * @brief  Set the specific FLASH error flag.
+  * @param  None
+  * @retval None
+  */
+static void FLASH_SetErrorCode(void)
+{  
+  if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_ENDHV))
+  {
+    pFlash.ErrorCode = FLASH_ERROR_ENDHV;
+  }
+  if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_WRPERR))
+  { 
+    pFlash.ErrorCode = FLASH_ERROR_WRP;
+  }
+  if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_PGAERR))
+  { 
+    pFlash.ErrorCode = FLASH_ERROR_PGA;
+  }
+  if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_SIZERR))
+  { 
+    pFlash.ErrorCode = FLASH_ERROR_SIZE;
+  }
+  if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_OPTVERR))
+  { 
+    pFlash.ErrorCode = FLASH_ERROR_OPTV;
+  }
+  if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_RDERR))
+  { 
+    pFlash.ErrorCode = FLASH_ERROR_RD;
+  }
+  if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_NOTZEROERR))
+  { 
+   pFlash.ErrorCode = FLASH_ERROR_NOTZERO;
+  }
+} 
+
+/**
+  * @brief  Erases a specified page in program memory.
+  * @note   To correctly run this function, the HAL_FLASH_Unlock() function
+  *         must be called before.
+  *         Call the HAL_FLASH_Lock() to disable the flash memory access 
+  *         (recommended to protect the FLASH memory against possible unwanted operation)
+  * @param  Page_Address: The page address in program memory to be erased.
+  * @note   A Page is erased in the Program memory only if the address to load 
+  *         is the start address of a page (multiple of 256 bytes).
+  * @retval HAL_StatusTypeDef HAL Status
+  */
+void FLASH_Erase_Page(uint32_t Page_Address)
+{
+  /* Set the ERASE bit */
+    FLASH->PECR |= FLASH_PECR_ERASE;
+
+    /* Set PROG bit */
+    FLASH->PECR |= FLASH_PECR_PROG;
+  
+    /* Write 00000000h to the first word of the program page to erase */
+    *(__IO uint32_t *)Page_Address = 0x00000000;
+}
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+/**
+  * @brief  Program word (32-bit) at a specified address.
+  * @param  Address: specifies the address to be programmed.
+  * @param  Data: specifies the data to be programmed.
+  * @retval None
+  */
+static void FLASH_Program_Word(uint32_t Address, uint32_t Data)
+{
+  /* Check the parameters */
+  assert_param(IS_FLASH_PROGRAM_ADDRESS(Address));
+  
+  /* Set PROG bit */
+  FLASH->PECR |= FLASH_PECR_PROG;
+  
+  *(__IO uint32_t*)Address = Data;
+}
+     
+/**
+  * @}
+  */
+   
+/**
+  * @}
+*/ 
+
+
+     
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/