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  1. /**
  2.   ******************************************************************************
  3.   * @file    stm32f1xx_hal_flash.c
  4.   * @author  MCD Application Team
  5.   * @brief   FLASH HAL module driver.
  6.   *          This file provides firmware functions to manage the following
  7.   *          functionalities of the internal FLASH memory:
  8.   *           + Program operations functions
  9.   *           + Memory Control functions
  10.   *           + Peripheral State functions
  11.   *        
  12.   @verbatim
  13.   ==============================================================================
  14.                         ##### FLASH peripheral features #####
  15.   ==============================================================================
  16.   [..] The Flash memory interface manages CPU AHB I-Code and D-Code accesses
  17.        to the Flash memory. It implements the erase and program Flash memory operations
  18.        and the read and write protection mechanisms.
  19.  
  20.   [..] The Flash memory interface accelerates code execution with a system of instruction
  21.       prefetch.
  22.  
  23.   [..] The FLASH main features are:
  24.       (+) Flash memory read operations
  25.       (+) Flash memory program/erase operations
  26.       (+) Read / write protections
  27.       (+) Prefetch on I-Code
  28.       (+) Option Bytes programming
  29.  
  30.  
  31.                      ##### How to use this driver #####
  32.   ==============================================================================
  33.   [..]                            
  34.       This driver provides functions and macros to configure and program the FLASH
  35.       memory of all STM32F1xx devices.
  36.    
  37.       (#) FLASH Memory I/O Programming functions: this group includes all needed
  38.           functions to erase and program the main memory:
  39.         (++) Lock and Unlock the FLASH interface
  40.         (++) Erase function: Erase page, erase all pages
  41.         (++) Program functions: half word, word and doubleword
  42.       (#) FLASH Option Bytes Programming functions: this group includes all needed
  43.           functions to manage the Option Bytes:
  44.         (++) Lock and Unlock the Option Bytes
  45.         (++) Set/Reset the write protection
  46.         (++) Set the Read protection Level
  47.         (++) Program the user Option Bytes
  48.         (++) Launch the Option Bytes loader
  49.         (++) Erase Option Bytes
  50.         (++) Program the data Option Bytes
  51.         (++) Get the Write protection.
  52.         (++) Get the user option bytes.
  53.    
  54.       (#) Interrupts and flags management functions : this group
  55.           includes all needed functions to:
  56.         (++) Handle FLASH interrupts
  57.         (++) Wait for last FLASH operation according to its status
  58.         (++) Get error flag status
  59.  
  60.   [..] In addition to these function, this driver includes a set of macros allowing
  61.        to handle the following operations:
  62.      
  63.       (+) Set/Get the latency
  64.       (+) Enable/Disable the prefetch buffer
  65.       (+) Enable/Disable the half cycle access
  66.       (+) Enable/Disable the FLASH interrupts
  67.       (+) Monitor the FLASH flags status
  68.          
  69.   @endverbatim
  70.   ******************************************************************************
  71.   * @attention
  72.   *
  73.   * Copyright (c) 2016 STMicroelectronics.
  74.   * All rights reserved.
  75.   *
  76.   * This software is licensed under terms that can be found in the LICENSE file in
  77.   * the root directory of this software component.
  78.   * If no LICENSE file comes with this software, it is provided AS-IS.
  79.   ******************************************************************************
  80.   */
  81.  
  82. /* Includes ------------------------------------------------------------------*/
  83. #include "stm32f1xx_hal.h"
  84.  
  85. /** @addtogroup STM32F1xx_HAL_Driver
  86.   * @{
  87.   */
  88.  
  89. #ifdef HAL_FLASH_MODULE_ENABLED
  90.  
  91. /** @defgroup FLASH FLASH
  92.   * @brief FLASH HAL module driver
  93.   * @{
  94.   */
  95.  
  96. /* Private typedef -----------------------------------------------------------*/
  97. /* Private define ------------------------------------------------------------*/
  98. /** @defgroup FLASH_Private_Constants FLASH Private Constants
  99.   * @{
  100.   */
  101. /**
  102.   * @}
  103.   */
  104.  
  105. /* Private macro ---------------------------- ---------------------------------*/
  106. /** @defgroup FLASH_Private_Macros FLASH Private Macros
  107.   * @{
  108.   */
  109.  
  110. /**
  111.   * @}
  112.   */
  113.  
  114. /* Private variables ---------------------------------------------------------*/
  115. /** @defgroup FLASH_Private_Variables FLASH Private Variables
  116.   * @{
  117.   */
  118. /* Variables used for Erase pages under interruption*/
  119. FLASH_ProcessTypeDef pFlash;
  120. /**
  121.   * @}
  122.   */
  123.  
  124. /* Private function prototypes -----------------------------------------------*/
  125. /** @defgroup FLASH_Private_Functions FLASH Private Functions
  126.   * @{
  127.   */
  128. static  void   FLASH_Program_HalfWord(uint32_t Address, uint16_t Data);
  129. static  void   FLASH_SetErrorCode(void);
  130. extern void    FLASH_PageErase(uint32_t PageAddress);
  131. /**
  132.   * @}
  133.   */
  134.  
  135. /* Exported functions ---------------------------------------------------------*/
  136. /** @defgroup FLASH_Exported_Functions FLASH Exported Functions
  137.   * @{
  138.   */
  139.  
  140. /** @defgroup FLASH_Exported_Functions_Group1 Programming operation functions
  141.   *  @brief   Programming operation functions
  142.   *
  143. @verbatim  
  144. @endverbatim
  145.   * @{
  146.   */
  147.  
  148. /**
  149.   * @brief  Program halfword, word or double word at a specified address
  150.   * @note   The function HAL_FLASH_Unlock() should be called before to unlock the FLASH interface
  151.   *         The function HAL_FLASH_Lock() should be called after to lock the FLASH interface
  152.   *
  153.   * @note   If an erase and a program operations are requested simultaneously,    
  154.   *         the erase operation is performed before the program one.
  155.   *  
  156.   * @note   FLASH should be previously erased before new programmation (only exception to this
  157.   *         is when 0x0000 is programmed)
  158.   *
  159.   * @param  TypeProgram:  Indicate the way to program at a specified address.
  160.   *                       This parameter can be a value of @ref FLASH_Type_Program
  161.   * @param  Address:      Specifies the address to be programmed.
  162.   * @param  Data:         Specifies the data to be programmed
  163.   *
  164.   * @retval HAL_StatusTypeDef HAL Status
  165.   */
  166. HAL_StatusTypeDef HAL_FLASH_Program(uint32_t TypeProgram, uint32_t Address, uint64_t Data)
  167. {
  168.   HAL_StatusTypeDef status = HAL_ERROR;
  169.   uint8_t index = 0;
  170.   uint8_t nbiterations = 0;
  171.  
  172.   /* Process Locked */
  173.   __HAL_LOCK(&pFlash);
  174.  
  175.   /* Check the parameters */
  176.   assert_param(IS_FLASH_TYPEPROGRAM(TypeProgram));
  177.   assert_param(IS_FLASH_PROGRAM_ADDRESS(Address));
  178.  
  179. #if defined(FLASH_BANK2_END)
  180.   if(Address <= FLASH_BANK1_END)
  181.   {
  182. #endif /* FLASH_BANK2_END */
  183.     /* Wait for last operation to be completed */
  184.     status = FLASH_WaitForLastOperation(FLASH_TIMEOUT_VALUE);
  185. #if defined(FLASH_BANK2_END)
  186.   }
  187.   else
  188.   {
  189.     /* Wait for last operation to be completed */
  190.     status = FLASH_WaitForLastOperationBank2(FLASH_TIMEOUT_VALUE);
  191.   }
  192. #endif /* FLASH_BANK2_END */
  193.  
  194.   if(status == HAL_OK)
  195.   {
  196.     if(TypeProgram == FLASH_TYPEPROGRAM_HALFWORD)
  197.     {
  198.       /* Program halfword (16-bit) at a specified address. */
  199.       nbiterations = 1U;
  200.     }
  201.     else if(TypeProgram == FLASH_TYPEPROGRAM_WORD)
  202.     {
  203.       /* Program word (32-bit = 2*16-bit) at a specified address. */
  204.       nbiterations = 2U;
  205.     }
  206.     else
  207.     {
  208.       /* Program double word (64-bit = 4*16-bit) at a specified address. */
  209.       nbiterations = 4U;
  210.     }
  211.  
  212.     for (index = 0U; index < nbiterations; index++)
  213.     {
  214.       FLASH_Program_HalfWord((Address + (2U*index)), (uint16_t)(Data >> (16U*index)));
  215.  
  216. #if defined(FLASH_BANK2_END)
  217.       if(Address <= FLASH_BANK1_END)
  218.       {
  219. #endif /* FLASH_BANK2_END */
  220.         /* Wait for last operation to be completed */
  221.         status = FLASH_WaitForLastOperation(FLASH_TIMEOUT_VALUE);
  222.    
  223.         /* If the program operation is completed, disable the PG Bit */
  224.         CLEAR_BIT(FLASH->CR, FLASH_CR_PG);
  225. #if defined(FLASH_BANK2_END)
  226.       }
  227.       else
  228.       {
  229.         /* Wait for last operation to be completed */
  230.         status = FLASH_WaitForLastOperationBank2(FLASH_TIMEOUT_VALUE);
  231.        
  232.         /* If the program operation is completed, disable the PG Bit */
  233.         CLEAR_BIT(FLASH->CR2, FLASH_CR2_PG);
  234.       }
  235. #endif /* FLASH_BANK2_END */
  236.       /* In case of error, stop programation procedure */
  237.       if (status != HAL_OK)
  238.       {
  239.         break;
  240.       }
  241.     }
  242.   }
  243.  
  244.   /* Process Unlocked */
  245.   __HAL_UNLOCK(&pFlash);
  246.  
  247.   return status;
  248. }
  249.  
  250. /**
  251.   * @brief  Program halfword, word or double word at a specified address  with interrupt enabled.
  252.   * @note   The function HAL_FLASH_Unlock() should be called before to unlock the FLASH interface
  253.   *         The function HAL_FLASH_Lock() should be called after to lock the FLASH interface
  254.   *
  255.   * @note   If an erase and a program operations are requested simultaneously,    
  256.   *         the erase operation is performed before the program one.
  257.   *
  258.   * @param  TypeProgram: Indicate the way to program at a specified address.
  259.   *                      This parameter can be a value of @ref FLASH_Type_Program
  260.   * @param  Address:     Specifies the address to be programmed.
  261.   * @param  Data:        Specifies the data to be programmed
  262.   *
  263.   * @retval HAL_StatusTypeDef HAL Status
  264.   */
  265. HAL_StatusTypeDef HAL_FLASH_Program_IT(uint32_t TypeProgram, uint32_t Address, uint64_t Data)
  266. {
  267.   HAL_StatusTypeDef status = HAL_OK;
  268.  
  269.   /* Process Locked */
  270.   __HAL_LOCK(&pFlash);
  271.  
  272.   /* Check the parameters */
  273.   assert_param(IS_FLASH_TYPEPROGRAM(TypeProgram));
  274.   assert_param(IS_FLASH_PROGRAM_ADDRESS(Address));
  275.  
  276. #if defined(FLASH_BANK2_END)
  277.   /* If procedure already ongoing, reject the next one */
  278.   if (pFlash.ProcedureOnGoing != FLASH_PROC_NONE)
  279.   {
  280.     return HAL_ERROR;
  281.   }
  282.  
  283.   if(Address <= FLASH_BANK1_END)
  284.   {
  285.     /* Enable End of FLASH Operation and Error source interrupts */
  286.     __HAL_FLASH_ENABLE_IT(FLASH_IT_EOP_BANK1 | FLASH_IT_ERR_BANK1);
  287.  
  288.   }else
  289.   {
  290.     /* Enable End of FLASH Operation and Error source interrupts */
  291.     __HAL_FLASH_ENABLE_IT(FLASH_IT_EOP_BANK2 | FLASH_IT_ERR_BANK2);
  292.   }
  293. #else
  294.   /* Enable End of FLASH Operation and Error source interrupts */
  295.   __HAL_FLASH_ENABLE_IT(FLASH_IT_EOP | FLASH_IT_ERR);
  296. #endif /* FLASH_BANK2_END */
  297.  
  298.   pFlash.Address = Address;
  299.   pFlash.Data = Data;
  300.  
  301.   if(TypeProgram == FLASH_TYPEPROGRAM_HALFWORD)
  302.   {
  303.     pFlash.ProcedureOnGoing = FLASH_PROC_PROGRAMHALFWORD;
  304.     /* Program halfword (16-bit) at a specified address. */
  305.     pFlash.DataRemaining = 1U;
  306.   }
  307.   else if(TypeProgram == FLASH_TYPEPROGRAM_WORD)
  308.   {
  309.     pFlash.ProcedureOnGoing = FLASH_PROC_PROGRAMWORD;
  310.     /* Program word (32-bit : 2*16-bit) at a specified address. */
  311.     pFlash.DataRemaining = 2U;
  312.   }
  313.   else
  314.   {
  315.     pFlash.ProcedureOnGoing = FLASH_PROC_PROGRAMDOUBLEWORD;
  316.     /* Program double word (64-bit : 4*16-bit) at a specified address. */
  317.     pFlash.DataRemaining = 4U;
  318.   }
  319.  
  320.   /* Program halfword (16-bit) at a specified address. */
  321.   FLASH_Program_HalfWord(Address, (uint16_t)Data);
  322.  
  323.   return status;
  324. }
  325.  
  326. /**
  327.   * @brief This function handles FLASH interrupt request.
  328.   * @retval None
  329.   */
  330. void HAL_FLASH_IRQHandler(void)
  331. {
  332.   uint32_t addresstmp = 0U;
  333.  
  334.   /* Check FLASH operation error flags */
  335. #if defined(FLASH_BANK2_END)
  336.   if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_WRPERR_BANK1) || __HAL_FLASH_GET_FLAG(FLASH_FLAG_PGERR_BANK1) || \
  337.     (__HAL_FLASH_GET_FLAG(FLASH_FLAG_WRPERR_BANK2) || __HAL_FLASH_GET_FLAG(FLASH_FLAG_PGERR_BANK2)))
  338. #else
  339.   if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_WRPERR) ||__HAL_FLASH_GET_FLAG(FLASH_FLAG_PGERR))
  340. #endif /* FLASH_BANK2_END */
  341.   {
  342.     /* Return the faulty address */
  343.     addresstmp = pFlash.Address;
  344.     /* Reset address */
  345.     pFlash.Address = 0xFFFFFFFFU;
  346.  
  347.     /* Save the Error code */
  348.     FLASH_SetErrorCode();
  349.    
  350.     /* FLASH error interrupt user callback */
  351.     HAL_FLASH_OperationErrorCallback(addresstmp);
  352.  
  353.     /* Stop the procedure ongoing */
  354.     pFlash.ProcedureOnGoing = FLASH_PROC_NONE;
  355.   }
  356.  
  357.   /* Check FLASH End of Operation flag  */
  358. #if defined(FLASH_BANK2_END)
  359.   if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_EOP_BANK1))
  360.   {
  361.     /* Clear FLASH End of Operation pending bit */
  362.     __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP_BANK1);
  363. #else
  364.   if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_EOP))
  365.   {
  366.     /* Clear FLASH End of Operation pending bit */
  367.     __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP);
  368. #endif /* FLASH_BANK2_END */
  369.    
  370.     /* Process can continue only if no error detected */
  371.     if(pFlash.ProcedureOnGoing != FLASH_PROC_NONE)
  372.     {
  373.       if(pFlash.ProcedureOnGoing == FLASH_PROC_PAGEERASE)
  374.       {
  375.         /* Nb of pages to erased can be decreased */
  376.         pFlash.DataRemaining--;
  377.  
  378.         /* Check if there are still pages to erase */
  379.         if(pFlash.DataRemaining != 0U)
  380.         {
  381.           addresstmp = pFlash.Address;
  382.           /*Indicate user which sector has been erased */
  383.           HAL_FLASH_EndOfOperationCallback(addresstmp);
  384.  
  385.           /*Increment sector number*/
  386.           addresstmp = pFlash.Address + FLASH_PAGE_SIZE;
  387.           pFlash.Address = addresstmp;
  388.  
  389.           /* If the erase operation is completed, disable the PER Bit */
  390.           CLEAR_BIT(FLASH->CR, FLASH_CR_PER);
  391.  
  392.           FLASH_PageErase(addresstmp);
  393.         }
  394.         else
  395.         {
  396.           /* No more pages to Erase, user callback can be called. */
  397.           /* Reset Sector and stop Erase pages procedure */
  398.           pFlash.Address = addresstmp = 0xFFFFFFFFU;
  399.           pFlash.ProcedureOnGoing = FLASH_PROC_NONE;
  400.           /* FLASH EOP interrupt user callback */
  401.           HAL_FLASH_EndOfOperationCallback(addresstmp);
  402.         }
  403.       }
  404.       else if(pFlash.ProcedureOnGoing == FLASH_PROC_MASSERASE)
  405.       {
  406.         /* Operation is completed, disable the MER Bit */
  407.         CLEAR_BIT(FLASH->CR, FLASH_CR_MER);
  408.  
  409. #if defined(FLASH_BANK2_END)
  410.         /* Stop Mass Erase procedure if no pending mass erase on other bank */
  411.         if (HAL_IS_BIT_CLR(FLASH->CR2, FLASH_CR2_MER))
  412.         {
  413. #endif /* FLASH_BANK2_END */
  414.           /* MassErase ended. Return the selected bank */
  415.           /* FLASH EOP interrupt user callback */
  416.           HAL_FLASH_EndOfOperationCallback(0U);
  417.  
  418.           /* Stop Mass Erase procedure*/
  419.           pFlash.ProcedureOnGoing = FLASH_PROC_NONE;
  420.         }
  421. #if defined(FLASH_BANK2_END)
  422.       }
  423. #endif /* FLASH_BANK2_END */
  424.       else
  425.       {
  426.         /* Nb of 16-bit data to program can be decreased */
  427.         pFlash.DataRemaining--;
  428.        
  429.         /* Check if there are still 16-bit data to program */
  430.         if(pFlash.DataRemaining != 0U)
  431.         {
  432.           /* Increment address to 16-bit */
  433.           pFlash.Address += 2U;
  434.           addresstmp = pFlash.Address;
  435.          
  436.           /* Shift to have next 16-bit data */
  437.           pFlash.Data = (pFlash.Data >> 16U);
  438.          
  439.           /* Operation is completed, disable the PG Bit */
  440.           CLEAR_BIT(FLASH->CR, FLASH_CR_PG);
  441.  
  442.           /*Program halfword (16-bit) at a specified address.*/
  443.           FLASH_Program_HalfWord(addresstmp, (uint16_t)pFlash.Data);
  444.         }
  445.         else
  446.         {
  447.           /* Program ended. Return the selected address */
  448.           /* FLASH EOP interrupt user callback */
  449.           if (pFlash.ProcedureOnGoing == FLASH_PROC_PROGRAMHALFWORD)
  450.           {
  451.             HAL_FLASH_EndOfOperationCallback(pFlash.Address);
  452.           }
  453.           else if (pFlash.ProcedureOnGoing == FLASH_PROC_PROGRAMWORD)
  454.           {
  455.             HAL_FLASH_EndOfOperationCallback(pFlash.Address - 2U);
  456.           }
  457.           else
  458.           {
  459.             HAL_FLASH_EndOfOperationCallback(pFlash.Address - 6U);
  460.           }
  461.        
  462.           /* Reset Address and stop Program procedure */
  463.           pFlash.Address = 0xFFFFFFFFU;
  464.           pFlash.ProcedureOnGoing = FLASH_PROC_NONE;
  465.         }
  466.       }
  467.     }
  468.   }
  469.  
  470. #if defined(FLASH_BANK2_END)
  471.   /* Check FLASH End of Operation flag  */
  472.   if(__HAL_FLASH_GET_FLAG( FLASH_FLAG_EOP_BANK2))
  473.   {
  474.     /* Clear FLASH End of Operation pending bit */
  475.     __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP_BANK2);
  476.    
  477.     /* Process can continue only if no error detected */
  478.     if(pFlash.ProcedureOnGoing != FLASH_PROC_NONE)
  479.     {
  480.       if(pFlash.ProcedureOnGoing == FLASH_PROC_PAGEERASE)
  481.       {
  482.         /* Nb of pages to erased can be decreased */
  483.         pFlash.DataRemaining--;
  484.        
  485.         /* Check if there are still pages to erase*/
  486.         if(pFlash.DataRemaining != 0U)
  487.         {
  488.           /* Indicate user which page address has been erased*/
  489.           HAL_FLASH_EndOfOperationCallback(pFlash.Address);
  490.        
  491.           /* Increment page address to next page */
  492.           pFlash.Address += FLASH_PAGE_SIZE;
  493.           addresstmp = pFlash.Address;
  494.  
  495.           /* Operation is completed, disable the PER Bit */
  496.           CLEAR_BIT(FLASH->CR2, FLASH_CR2_PER);
  497.  
  498.           FLASH_PageErase(addresstmp);
  499.         }
  500.         else
  501.         {
  502.           /*No more pages to Erase*/
  503.          
  504.           /*Reset Address and stop Erase pages procedure*/
  505.           pFlash.Address = 0xFFFFFFFFU;
  506.           pFlash.ProcedureOnGoing = FLASH_PROC_NONE;
  507.  
  508.           /* FLASH EOP interrupt user callback */
  509.           HAL_FLASH_EndOfOperationCallback(pFlash.Address);
  510.         }
  511.       }
  512.       else if(pFlash.ProcedureOnGoing == FLASH_PROC_MASSERASE)
  513.       {
  514.         /* Operation is completed, disable the MER Bit */
  515.         CLEAR_BIT(FLASH->CR2, FLASH_CR2_MER);
  516.  
  517.         if (HAL_IS_BIT_CLR(FLASH->CR, FLASH_CR_MER))
  518.         {
  519.           /* MassErase ended. Return the selected bank*/
  520.           /* FLASH EOP interrupt user callback */
  521.           HAL_FLASH_EndOfOperationCallback(0U);
  522.        
  523.           pFlash.ProcedureOnGoing = FLASH_PROC_NONE;
  524.         }
  525.       }
  526.       else
  527.       {
  528.         /* Nb of 16-bit data to program can be decreased */
  529.         pFlash.DataRemaining--;
  530.        
  531.         /* Check if there are still 16-bit data to program */
  532.         if(pFlash.DataRemaining != 0U)
  533.         {
  534.           /* Increment address to 16-bit */
  535.           pFlash.Address += 2U;
  536.           addresstmp = pFlash.Address;
  537.          
  538.           /* Shift to have next 16-bit data */
  539.           pFlash.Data = (pFlash.Data >> 16U);
  540.          
  541.           /* Operation is completed, disable the PG Bit */
  542.           CLEAR_BIT(FLASH->CR2, FLASH_CR2_PG);
  543.  
  544.           /*Program halfword (16-bit) at a specified address.*/
  545.           FLASH_Program_HalfWord(addresstmp, (uint16_t)pFlash.Data);
  546.         }
  547.         else
  548.         {
  549.           /*Program ended. Return the selected address*/
  550.           /* FLASH EOP interrupt user callback */
  551.           if (pFlash.ProcedureOnGoing == FLASH_PROC_PROGRAMHALFWORD)
  552.           {
  553.             HAL_FLASH_EndOfOperationCallback(pFlash.Address);
  554.           }
  555.           else if (pFlash.ProcedureOnGoing == FLASH_PROC_PROGRAMWORD)
  556.           {
  557.             HAL_FLASH_EndOfOperationCallback(pFlash.Address-2U);
  558.           }
  559.           else
  560.           {
  561.             HAL_FLASH_EndOfOperationCallback(pFlash.Address-6U);
  562.           }
  563.          
  564.           /* Reset Address and stop Program procedure*/
  565.           pFlash.Address = 0xFFFFFFFFU;
  566.           pFlash.ProcedureOnGoing = FLASH_PROC_NONE;
  567.         }
  568.       }
  569.     }
  570.   }
  571. #endif
  572.  
  573.   if(pFlash.ProcedureOnGoing == FLASH_PROC_NONE)
  574.   {
  575. #if defined(FLASH_BANK2_END)
  576.     /* Operation is completed, disable the PG, PER and MER Bits for both bank */
  577.     CLEAR_BIT(FLASH->CR, (FLASH_CR_PG | FLASH_CR_PER | FLASH_CR_MER));
  578.     CLEAR_BIT(FLASH->CR2, (FLASH_CR2_PG | FLASH_CR2_PER | FLASH_CR2_MER));  
  579.  
  580.     /* Disable End of FLASH Operation and Error source interrupts for both banks */
  581.     __HAL_FLASH_DISABLE_IT(FLASH_IT_EOP_BANK1 | FLASH_IT_ERR_BANK1 | FLASH_IT_EOP_BANK2 | FLASH_IT_ERR_BANK2);
  582. #else
  583.     /* Operation is completed, disable the PG, PER and MER Bits */
  584.     CLEAR_BIT(FLASH->CR, (FLASH_CR_PG | FLASH_CR_PER | FLASH_CR_MER));
  585.  
  586.     /* Disable End of FLASH Operation and Error source interrupts */
  587.     __HAL_FLASH_DISABLE_IT(FLASH_IT_EOP | FLASH_IT_ERR);
  588. #endif /* FLASH_BANK2_END */
  589.  
  590.     /* Process Unlocked */
  591.     __HAL_UNLOCK(&pFlash);
  592.   }
  593. }
  594.  
  595. /**
  596.   * @brief  FLASH end of operation interrupt callback
  597.   * @param  ReturnValue: The value saved in this parameter depends on the ongoing procedure
  598.   *                 - Mass Erase: No return value expected
  599.   *                 - Pages Erase: Address of the page which has been erased
  600.   *                    (if 0xFFFFFFFF, it means that all the selected pages have been erased)
  601.   *                 - Program: Address which was selected for data program
  602.   * @retval none
  603.   */
  604. __weak void HAL_FLASH_EndOfOperationCallback(uint32_t ReturnValue)
  605. {
  606.   /* Prevent unused argument(s) compilation warning */
  607.   UNUSED(ReturnValue);
  608.  
  609.   /* NOTE : This function Should not be modified, when the callback is needed,
  610.             the HAL_FLASH_EndOfOperationCallback could be implemented in the user file
  611.    */
  612. }
  613.  
  614. /**
  615.   * @brief  FLASH operation error interrupt callback
  616.   * @param  ReturnValue: The value saved in this parameter depends on the ongoing procedure
  617.   *                 - Mass Erase: No return value expected
  618.   *                 - Pages Erase: Address of the page which returned an error
  619.   *                 - Program: Address which was selected for data program
  620.   * @retval none
  621.   */
  622. __weak void HAL_FLASH_OperationErrorCallback(uint32_t ReturnValue)
  623. {
  624.   /* Prevent unused argument(s) compilation warning */
  625.   UNUSED(ReturnValue);
  626.  
  627.   /* NOTE : This function Should not be modified, when the callback is needed,
  628.             the HAL_FLASH_OperationErrorCallback could be implemented in the user file
  629.    */
  630. }
  631.  
  632. /**
  633.   * @}
  634.   */
  635.  
  636. /** @defgroup FLASH_Exported_Functions_Group2 Peripheral Control functions
  637.  *  @brief   management functions
  638.  *
  639. @verbatim  
  640.  ===============================================================================
  641.                       ##### Peripheral Control functions #####
  642.  ===============================================================================  
  643.     [..]
  644.     This subsection provides a set of functions allowing to control the FLASH
  645.     memory operations.
  646.  
  647. @endverbatim
  648.   * @{
  649.   */
  650.  
  651. /**
  652.   * @brief  Unlock the FLASH control register access
  653.   * @retval HAL Status
  654.   */
  655. HAL_StatusTypeDef HAL_FLASH_Unlock(void)
  656. {
  657.   HAL_StatusTypeDef status = HAL_OK;
  658.  
  659.   if(READ_BIT(FLASH->CR, FLASH_CR_LOCK) != RESET)
  660.   {
  661.     /* Authorize the FLASH Registers access */
  662.     WRITE_REG(FLASH->KEYR, FLASH_KEY1);
  663.     WRITE_REG(FLASH->KEYR, FLASH_KEY2);
  664.  
  665.     /* Verify Flash is unlocked */
  666.     if(READ_BIT(FLASH->CR, FLASH_CR_LOCK) != RESET)
  667.     {
  668.       status = HAL_ERROR;
  669.     }
  670.   }
  671. #if defined(FLASH_BANK2_END)
  672.   if(READ_BIT(FLASH->CR2, FLASH_CR2_LOCK) != RESET)
  673.   {
  674.     /* Authorize the FLASH BANK2 Registers access */
  675.     WRITE_REG(FLASH->KEYR2, FLASH_KEY1);
  676.     WRITE_REG(FLASH->KEYR2, FLASH_KEY2);
  677.    
  678.     /* Verify Flash BANK2 is unlocked */
  679.     if(READ_BIT(FLASH->CR2, FLASH_CR2_LOCK) != RESET)
  680.     {
  681.       status = HAL_ERROR;
  682.     }
  683.   }
  684. #endif /* FLASH_BANK2_END */
  685.  
  686.   return status;
  687. }
  688.  
  689. /**
  690.   * @brief  Locks the FLASH control register access
  691.   * @retval HAL Status
  692.   */
  693. HAL_StatusTypeDef HAL_FLASH_Lock(void)
  694. {
  695.   /* Set the LOCK Bit to lock the FLASH Registers access */
  696.   SET_BIT(FLASH->CR, FLASH_CR_LOCK);
  697.  
  698. #if defined(FLASH_BANK2_END)
  699.   /* Set the LOCK Bit to lock the FLASH BANK2 Registers access */
  700.   SET_BIT(FLASH->CR2, FLASH_CR2_LOCK);
  701.  
  702. #endif /* FLASH_BANK2_END */
  703.   return HAL_OK;  
  704. }
  705.  
  706. /**
  707.   * @brief  Unlock the FLASH Option Control Registers access.
  708.   * @retval HAL Status
  709.   */
  710. HAL_StatusTypeDef HAL_FLASH_OB_Unlock(void)
  711. {
  712.   if (HAL_IS_BIT_CLR(FLASH->CR, FLASH_CR_OPTWRE))
  713.   {
  714.     /* Authorizes the Option Byte register programming */
  715.     WRITE_REG(FLASH->OPTKEYR, FLASH_OPTKEY1);
  716.     WRITE_REG(FLASH->OPTKEYR, FLASH_OPTKEY2);
  717.   }
  718.   else
  719.   {
  720.     return HAL_ERROR;
  721.   }  
  722.  
  723.   return HAL_OK;  
  724. }
  725.  
  726. /**
  727.   * @brief  Lock the FLASH Option Control Registers access.
  728.   * @retval HAL Status
  729.   */
  730. HAL_StatusTypeDef HAL_FLASH_OB_Lock(void)
  731. {
  732.   /* Clear the OPTWRE Bit to lock the FLASH Option Byte Registers access */
  733.   CLEAR_BIT(FLASH->CR, FLASH_CR_OPTWRE);
  734.  
  735.   return HAL_OK;  
  736. }
  737.  
  738. /**
  739.   * @brief  Launch the option byte loading.
  740.   * @note   This function will reset automatically the MCU.
  741.   * @retval None
  742.   */
  743. void HAL_FLASH_OB_Launch(void)
  744. {
  745.   /* Initiates a system reset request to launch the option byte loading */
  746.   HAL_NVIC_SystemReset();
  747. }
  748.  
  749. /**
  750.   * @}
  751.   */  
  752.  
  753. /** @defgroup FLASH_Exported_Functions_Group3 Peripheral errors functions
  754.  *  @brief    Peripheral errors functions
  755.  *
  756. @verbatim  
  757.  ===============================================================================
  758.                       ##### Peripheral Errors functions #####
  759.  ===============================================================================  
  760.     [..]
  761.     This subsection permit to get in run-time errors of  the FLASH peripheral.
  762.  
  763. @endverbatim
  764.   * @{
  765.   */
  766.  
  767. /**
  768.   * @brief  Get the specific FLASH error flag.
  769.   * @retval FLASH_ErrorCode The returned value can be:
  770.   *            @ref FLASH_Error_Codes
  771.   */
  772. uint32_t HAL_FLASH_GetError(void)
  773. {
  774.    return pFlash.ErrorCode;
  775. }
  776.  
  777. /**
  778.   * @}
  779.   */
  780.  
  781. /**
  782.   * @}
  783.   */
  784.  
  785. /** @addtogroup FLASH_Private_Functions
  786.  * @{
  787.  */
  788.  
  789. /**
  790.   * @brief  Program a half-word (16-bit) at a specified address.
  791.   * @param  Address specify the address to be programmed.
  792.   * @param  Data    specify the data to be programmed.
  793.   * @retval None
  794.   */
  795. static void FLASH_Program_HalfWord(uint32_t Address, uint16_t Data)
  796. {
  797.   /* Clean the error context */
  798.   pFlash.ErrorCode = HAL_FLASH_ERROR_NONE;
  799.  
  800. #if defined(FLASH_BANK2_END)
  801.   if(Address <= FLASH_BANK1_END)
  802.   {
  803. #endif /* FLASH_BANK2_END */
  804.     /* Proceed to program the new data */
  805.     SET_BIT(FLASH->CR, FLASH_CR_PG);
  806. #if defined(FLASH_BANK2_END)
  807.   }
  808.   else
  809.   {
  810.     /* Proceed to program the new data */
  811.     SET_BIT(FLASH->CR2, FLASH_CR2_PG);
  812.   }
  813. #endif /* FLASH_BANK2_END */
  814.  
  815.   /* Write data in the address */
  816.   *(__IO uint16_t*)Address = Data;
  817. }
  818.  
  819. /**
  820.   * @brief  Wait for a FLASH operation to complete.
  821.   * @param  Timeout  maximum flash operation timeout
  822.   * @retval HAL Status
  823.   */
  824. HAL_StatusTypeDef FLASH_WaitForLastOperation(uint32_t Timeout)
  825. {
  826.   /* Wait for the FLASH operation to complete by polling on BUSY flag to be reset.
  827.      Even if the FLASH operation fails, the BUSY flag will be reset and an error
  828.      flag will be set */
  829.      
  830.   uint32_t tickstart = HAL_GetTick();
  831.      
  832.   while(__HAL_FLASH_GET_FLAG(FLASH_FLAG_BSY))
  833.   {
  834.     if (Timeout != HAL_MAX_DELAY)
  835.     {
  836.       if((Timeout == 0U) || ((HAL_GetTick()-tickstart) > Timeout))
  837.       {
  838.         return HAL_TIMEOUT;
  839.       }
  840.     }
  841.   }
  842.  
  843.   /* Check FLASH End of Operation flag  */
  844.   if (__HAL_FLASH_GET_FLAG(FLASH_FLAG_EOP))
  845.   {
  846.     /* Clear FLASH End of Operation pending bit */
  847.     __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP);
  848.   }
  849.  
  850.   if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_WRPERR)  ||
  851.      __HAL_FLASH_GET_FLAG(FLASH_FLAG_OPTVERR) ||
  852.      __HAL_FLASH_GET_FLAG(FLASH_FLAG_PGERR))
  853.   {
  854.     /*Save the error code*/
  855.     FLASH_SetErrorCode();
  856.     return HAL_ERROR;
  857.   }
  858.  
  859.   /* There is no error flag set */
  860.   return HAL_OK;
  861. }
  862.  
  863. #if defined(FLASH_BANK2_END)
  864. /**
  865.   * @brief  Wait for a FLASH BANK2 operation to complete.
  866.   * @param  Timeout maximum flash operation timeout
  867.   * @retval HAL_StatusTypeDef HAL Status
  868.   */
  869. HAL_StatusTypeDef FLASH_WaitForLastOperationBank2(uint32_t Timeout)
  870. {
  871.   /* Wait for the FLASH BANK2 operation to complete by polling on BUSY flag to be reset.
  872.      Even if the FLASH BANK2 operation fails, the BUSY flag will be reset and an error
  873.      flag will be set */
  874.      
  875.   uint32_t tickstart = HAL_GetTick();
  876.      
  877.   while(__HAL_FLASH_GET_FLAG(FLASH_FLAG_BSY_BANK2))
  878.   {
  879.     if (Timeout != HAL_MAX_DELAY)
  880.     {
  881.       if((Timeout == 0U) || ((HAL_GetTick()-tickstart) > Timeout))
  882.       {
  883.         return HAL_TIMEOUT;
  884.       }
  885.     }
  886.   }
  887.  
  888.   /* Check FLASH End of Operation flag  */
  889.   if (__HAL_FLASH_GET_FLAG(FLASH_FLAG_EOP_BANK2))
  890.   {
  891.     /* Clear FLASH End of Operation pending bit */
  892.     __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP_BANK2);
  893.   }
  894.  
  895.   if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_WRPERR_BANK2) || __HAL_FLASH_GET_FLAG(FLASH_FLAG_PGERR_BANK2))
  896.   {
  897.     /*Save the error code*/
  898.     FLASH_SetErrorCode();
  899.     return HAL_ERROR;
  900.   }
  901.  
  902.   /* If there is an error flag set */
  903.   return HAL_OK;
  904.  
  905. }
  906. #endif /* FLASH_BANK2_END */
  907.  
  908. /**
  909.   * @brief  Set the specific FLASH error flag.
  910.   * @retval None
  911.   */
  912. static void FLASH_SetErrorCode(void)
  913. {
  914.   uint32_t flags = 0U;
  915.  
  916. #if defined(FLASH_BANK2_END)
  917.   if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_WRPERR) || __HAL_FLASH_GET_FLAG(FLASH_FLAG_WRPERR_BANK2))
  918. #else
  919.   if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_WRPERR))
  920. #endif /* FLASH_BANK2_END */
  921.   {
  922.     pFlash.ErrorCode |= HAL_FLASH_ERROR_WRP;
  923. #if defined(FLASH_BANK2_END)
  924.     flags |= FLASH_FLAG_WRPERR | FLASH_FLAG_WRPERR_BANK2;
  925. #else
  926.     flags |= FLASH_FLAG_WRPERR;
  927. #endif /* FLASH_BANK2_END */
  928.   }
  929. #if defined(FLASH_BANK2_END)
  930.   if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_PGERR) || __HAL_FLASH_GET_FLAG(FLASH_FLAG_PGERR_BANK2))
  931. #else
  932.   if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_PGERR))
  933. #endif /* FLASH_BANK2_END */
  934.   {
  935.     pFlash.ErrorCode |= HAL_FLASH_ERROR_PROG;
  936. #if defined(FLASH_BANK2_END)
  937.     flags |= FLASH_FLAG_PGERR | FLASH_FLAG_PGERR_BANK2;
  938. #else
  939.     flags |= FLASH_FLAG_PGERR;
  940. #endif /* FLASH_BANK2_END */
  941.   }
  942.   if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_OPTVERR))
  943.   {
  944.     pFlash.ErrorCode |= HAL_FLASH_ERROR_OPTV;
  945.   __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_OPTVERR);
  946.   }
  947.  
  948.   /* Clear FLASH error pending bits */
  949.   __HAL_FLASH_CLEAR_FLAG(flags);
  950. }  
  951. /**
  952.   * @}
  953.   */
  954.  
  955. /**
  956.   * @}
  957.   */
  958.  
  959. #endif /* HAL_FLASH_MODULE_ENABLED */
  960.  
  961. /**
  962.   * @}
  963.   */
  964.  
  965.