tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32F3XX/stm32f30x_flash.c

   1 /**
   2   ******************************************************************************
   3   * @file    stm32f30x_flash.c
   4   * @author  MCD Application Team
   5   * @version V1.1.0
   6   * @date    27-February-2014
   7   * @brief   This file provides firmware functions to manage the following
   8   *          functionalities of the FLASH peripheral:
   9   *            + FLASH Interface configuration
  10   *            + FLASH Memory Programming
  11   *            + Option Bytes Programming
  12   *            + Interrupts and flags management
  13   *
  14   @verbatim
  15
  16  ===============================================================================
  17                       ##### How to use this driver #####
  18  ===============================================================================
  19     [..] This driver provides functions to configure and program the FLASH
  20          memory of all STM32F30x devices. These functions are split in 4 groups:
  21          (#) FLASH Interface configuration functions: this group includes the
  22              management of following features:
  23              (++) Set the latency.
  24              (++) Enable/Disable the Half Cycle Access.
  25              (++) Enable/Disable the prefetch buffer.
  26          (#) FLASH Memory Programming functions: this group includes all needed
  27              functions to erase and program the main memory:
  28              (++) Lock and Unlock the FLASH interface.
  29              (++) Erase function: Erase page, erase all pages.
  30              (++) Program functions: Half Word and Word write.
  31          (#) FLASH Option Bytes Programming functions: this group includes all
  32              needed functions to manage the Option Bytes:
  33              (++) Lock and Unlock the Flash Option bytes.
  34              (++) Launch the Option Bytes loader
  35              (++) Erase the Option Bytes
  36              (++) Set/Reset the write protection
  37              (++) Set the Read protection Level
  38              (++) Program the user option Bytes
  39              (++) Set/Reset the BOOT1 bit
  40              (++) Enable/Disable the VDDA Analog Monitoring
  41              (++) Enable/Disable the SRAM parity
  42              (++) Get the user option bytes
  43              (++) Get the Write protection
  44              (++) Get the read protection status
  45          (#) FLASH Interrupts and flags management functions: this group includes
  46              all needed functions to:
  47              (++) Enable/Disable the FLASH interrupt sources.
  48              (++) Get flags status.
  49              (++) Clear flags.
  50              (++) Get FLASH operation status.
  51              (++) Wait for last FLASH operation.
  52
  53   @endverbatim
  54
  55   ******************************************************************************
  56   * @attention
  57   *
  58   * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
  59   *
  60   * Redistribution and use in source and binary forms, with or without modification,
  61   * are permitted provided that the following conditions are met:
  62   *   1. Redistributions of source code must retain the above copyright notice,
  63   *      this list of conditions and the following disclaimer.
  64   *   2. Redistributions in binary form must reproduce the above copyright notice,
  65   *      this list of conditions and the following disclaimer in the documentation
  66   *      and/or other materials provided with the distribution.
  67   *   3. Neither the name of STMicroelectronics nor the names of its contributors
  68   *      may be used to endorse or promote products derived from this software
  69   *      without specific prior written permission.
  70   *
  71   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  72   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  73   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  74   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  75   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  76   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  77   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  78   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  79   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  80   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  81   *
  82   ******************************************************************************
  83   */
  84
  85 /* Includes ------------------------------------------------------------------*/
  86 #include "stm32f30x_flash.h"
  87
  88 /** @addtogroup STM32F30x_StdPeriph_Driver
  89   * @{
  90   */
  91
  92 /** @defgroup FLASH
  93   * @brief FLASH driver modules
  94   * @{
  95   */
  96
  97 /* Private typedef -----------------------------------------------------------*/
  98 /* Private define ------------------------------------------------------------*/
  99
 100 /* FLASH Mask */
 101 #define RDPRT_MASK                 ((uint32_t)0x00000002)
 102 #define WRP01_MASK                 ((uint32_t)0x0000FFFF)
 103 #define WRP23_MASK                 ((uint32_t)0xFFFF0000)
 104 /* Private macro -------------------------------------------------------------*/
 105 /* Private variables ---------------------------------------------------------*/
 106 /* Private function prototypes -----------------------------------------------*/
 107 /* Private functions ---------------------------------------------------------*/
 108
 109 /** @defgroup FLASH_Private_Functions
 110   * @{
 111   */
 112
 113 /** @defgroup FLASH_Group1 FLASH Interface configuration functions
 114   *  @brief   FLASH Interface configuration functions
 115  *
 116
 117 @verbatim
 118  ===============================================================================
 119             ##### FLASH Interface configuration functions #####
 120  ===============================================================================
 121     [..] This group includes the following functions:
 122          (+) void FLASH_SetLatency(uint32_t FLASH_Latency);
 123          (+) void FLASH_HalfCycleAccessCmd(uint32_t FLASH_HalfCycleAccess);
 124          (+) void FLASH_PrefetchBufferCmd(FunctionalState NewState);
 125     [..] The unlock sequence is not needed for these functions.
 126
 127 @endverbatim
 128   * @{
 129   */
 130
 131 /**
 132   * @brief  Sets the code latency value.
 133   * @param  FLASH_Latency: specifies the FLASH Latency value.
 134   *          This parameter can be one of the following values:
 135   *            @arg FLASH_Latency_0: FLASH Zero Latency cycle
 136   *            @arg FLASH_Latency_1: FLASH One Latency cycle
 137   *            @arg FLASH_Latency_2: FLASH Two Latency cycles
 138   * @retval None
 139   */
 140 void FLASH_SetLatency(uint32_t FLASH_Latency)
 141 {
 142    uint32_t tmpreg = 0;
 143
 144   /* Check the parameters */
 145   assert_param(IS_FLASH_LATENCY(FLASH_Latency));
 146
 147   /* Read the ACR register */
 148   tmpreg = FLASH->ACR;
 149
 150   /* Sets the Latency value */
 151   tmpreg &= (uint32_t) (~((uint32_t)FLASH_ACR_LATENCY));
 152   tmpreg |= FLASH_Latency;
 153
 154   /* Write the ACR register */
 155   FLASH->ACR = tmpreg;
 156 }
 157
 158 /**
 159   * @brief  Enables or disables the Half cycle flash access.
 160   * @param  FLASH_HalfCycleAccess: specifies the FLASH Half cycle Access mode.
 161   *          This parameter can be one of the following values:
 162   *            @arg FLASH_HalfCycleAccess_Enable: FLASH Half Cycle Enable
 163   *            @arg FLASH_HalfCycleAccess_Disable: FLASH Half Cycle Disable
 164   * @retval None
 165   */
 166 void FLASH_HalfCycleAccessCmd(FunctionalState NewState)
 167 {
 168   /* Check the parameters */
 169   assert_param(IS_FUNCTIONAL_STATE(NewState));
 170
 171   if(NewState != DISABLE)
 172   {
 173     FLASH->ACR |= FLASH_ACR_HLFCYA;
 174   }
 175   else
 176   {
 177     FLASH->ACR &= (uint32_t)(~((uint32_t)FLASH_ACR_HLFCYA));
 178   }
 179 }
 180
 181 /**
 182   * @brief  Enables or disables the Prefetch Buffer.
 183   * @param  NewState: new state of the Prefetch Buffer.
 184   *          This parameter  can be: ENABLE or DISABLE.
 185   * @retval None
 186   */
 187 void FLASH_PrefetchBufferCmd(FunctionalState NewState)
 188 {
 189   /* Check the parameters */
 190   assert_param(IS_FUNCTIONAL_STATE(NewState));
 191
 192   if(NewState != DISABLE)
 193   {
 194     FLASH->ACR |= FLASH_ACR_PRFTBE;
 195   }
 196   else
 197   {
 198     FLASH->ACR &= (uint32_t)(~((uint32_t)FLASH_ACR_PRFTBE));
 199   }
 200 }
 201
 202 /**
 203   * @}
 204   */
 205
 206 /** @defgroup FLASH_Group2 FLASH Memory Programming functions
 207  *  @brief   FLASH Memory Programming functions
 208  *
 209 @verbatim
 210  ===============================================================================
 211               ##### FLASH Memory Programming functions #####
 212  ===============================================================================
 213     [..] This group includes the following functions:
 214          (+) void FLASH_Unlock(void);
 215          (+) void FLASH_Lock(void);
 216          (+) FLASH_Status FLASH_ErasePage(uint32_t Page_Address);
 217          (+) FLASH_Status FLASH_EraseAllPages(void);
 218          (+) FLASH_Status FLASH_ProgramWord(uint32_t Address, uint32_t Data);
 219          (+) FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t Data);
 220     [..] Any operation of erase or program should follow these steps:
 221          (#) Call the FLASH_Unlock() function to enable the FLASH control register
 222              program memory access.
 223          (#) Call the desired function to erase page or program data.
 224          (#) Call the FLASH_Lock() function to disable the FLASH control register
 225              access (recommended to protect the FLASH memory against possible
 226              unwanted operation).
 227
 228 @endverbatim
 229   * @{
 230   */
 231
 232 /**
 233   * @brief  Unlocks the FLASH control register access
 234   * @param  None
 235   * @retval None
 236   */
 237 void FLASH_Unlock(void)
 238 {
 239   if((FLASH->CR & FLASH_CR_LOCK) != RESET)
 240   {
 241     /* Authorize the FLASH Registers access */
 242     FLASH->KEYR = FLASH_KEY1;
 243     FLASH->KEYR = FLASH_KEY2;
 244   }
 245 }
 246
 247 /**
 248   * @brief  Locks the FLASH control register access
 249   * @param  None
 250   * @retval None
 251   */
 252 void FLASH_Lock(void)
 253 {
 254   /* Set the LOCK Bit to lock the FLASH Registers access */
 255   FLASH->CR |= FLASH_CR_LOCK;
 256 }
 257
 258 /**
 259   * @brief  Erases a specified page in program memory.
 260   * @note   To correctly run this function, the FLASH_Unlock() function
 261   *         must be called before.
 262   * @note   Call the FLASH_Lock() to disable the flash memory access
 263   *         (recommended to protect the FLASH memory against possible unwanted operation)
 264   * @param  Page_Address: The page address in program memory to be erased.
 265   * @note   A Page is erased in the Program memory only if the address to load
 266   *         is the start address of a page (multiple of 1024 bytes).
 267   * @retval FLASH Status: The returned value can be:
 268   *         FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
 269   */
 270 FLASH_Status FLASH_ErasePage(uint32_t Page_Address)
 271 {
 272   FLASH_Status status = FLASH_COMPLETE;
 273
 274   /* Check the parameters */
 275   assert_param(IS_FLASH_PROGRAM_ADDRESS(Page_Address));
 276
 277   /* Wait for last operation to be completed */
 278   status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 279
 280   if(status == FLASH_COMPLETE)
 281   {
 282     /* If the previous operation is completed, proceed to erase the page */
 283     FLASH->CR |= FLASH_CR_PER;
 284     FLASH->AR  = Page_Address;
 285     FLASH->CR |= FLASH_CR_STRT;
 286
 287     /* Wait for last operation to be completed */
 288     status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 289
 290     /* Disable the PER Bit */
 291     FLASH->CR &= ~FLASH_CR_PER;
 292   }
 293
 294   /* Return the Erase Status */
 295   return status;
 296 }
 297
 298 /**
 299   * @brief  Erases all FLASH pages.
 300   * @note   To correctly run this function, the FLASH_Unlock() function
 301   *         must be called before.
 302   *         all the FLASH_Lock() to disable the flash memory access
 303   *         (recommended to protect the FLASH memory against possible unwanted operation)
 304   * @param  None
 305   * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
 306   *         FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
 307   */
 308 FLASH_Status FLASH_EraseAllPages(void)
 309 {
 310   FLASH_Status status = FLASH_COMPLETE;
 311
 312   /* Wait for last operation to be completed */
 313   status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 314
 315   if(status == FLASH_COMPLETE)
 316   {
 317     /* if the previous operation is completed, proceed to erase all pages */
 318      FLASH->CR |= FLASH_CR_MER;
 319      FLASH->CR |= FLASH_CR_STRT;
 320
 321     /* Wait for last operation to be completed */
 322     status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 323
 324     /* Disable the MER Bit */
 325     FLASH->CR &= ~FLASH_CR_MER;
 326   }
 327
 328   /* Return the Erase Status */
 329   return status;
 330 }
 331
 332 /**
 333   * @brief  Programs a word at a specified address.
 334   * @note   To correctly run this function, the FLASH_Unlock() function
 335   *         must be called before.
 336   *         Call the FLASH_Lock() to disable the flash memory access
 337   *         (recommended to protect the FLASH memory against possible unwanted operation)
 338   * @param  Address: specifies the address to be programmed.
 339   * @param  Data: specifies the data to be programmed.
 340   * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
 341   *         FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
 342   */
 343 FLASH_Status FLASH_ProgramWord(uint32_t Address, uint32_t Data)
 344 {
 345   FLASH_Status status = FLASH_COMPLETE;
 346   __IO uint32_t tmp = 0;
 347
 348   /* Check the parameters */
 349   assert_param(IS_FLASH_PROGRAM_ADDRESS(Address));
 350
 351   /* Wait for last operation to be completed */
 352   status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 353
 354   if(status == FLASH_COMPLETE)
 355   {
 356     /* If the previous operation is completed, proceed to program the new first
 357     half word */
 358     FLASH->CR |= FLASH_CR_PG;
 359
 360     *(__IO uint16_t*)Address = (uint16_t)Data;
 361
 362     /* Wait for last operation to be completed */
 363     status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 364
 365     if(status == FLASH_COMPLETE)
 366     {
 367       /* If the previous operation is completed, proceed to program the new second
 368       half word */
 369       tmp = Address + 2;
 370
 371       *(__IO uint16_t*) tmp = Data >> 16;
 372
 373       /* Wait for last operation to be completed */
 374       status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 375
 376       /* Disable the PG Bit */
 377       FLASH->CR &= ~FLASH_CR_PG;
 378     }
 379     else
 380     {
 381       /* Disable the PG Bit */
 382       FLASH->CR &= ~FLASH_CR_PG;
 383     }
 384   }
 385
 386   /* Return the Program Status */
 387   return status;
 388 }
 389
 390 /**
 391   * @brief  Programs a half word at a specified address.
 392   * @note   To correctly run this function, the FLASH_Unlock() function
 393   *         must be called before.
 394   *         Call the FLASH_Lock() to disable the flash memory access
 395   *         (recommended to protect the FLASH memory against possible unwanted operation)
 396   * @param  Address: specifies the address to be programmed.
 397   * @param  Data: specifies the data to be programmed.
 398   * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
 399   *         FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
 400   */
 401 FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t Data)
 402 {
 403   FLASH_Status status = FLASH_COMPLETE;
 404
 405   /* Check the parameters */
 406   assert_param(IS_FLASH_PROGRAM_ADDRESS(Address));
 407
 408   /* Wait for last operation to be completed */
 409   status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 410
 411   if(status == FLASH_COMPLETE)
 412   {
 413     /* If the previous operation is completed, proceed to program the new data */
 414     FLASH->CR |= FLASH_CR_PG;
 415
 416     *(__IO uint16_t*)Address = Data;
 417
 418     /* Wait for last operation to be completed */
 419     status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 420
 421     /* Disable the PG Bit */
 422     FLASH->CR &= ~FLASH_CR_PG;
 423   }
 424
 425   /* Return the Program Status */
 426   return status;
 427 }
 428
 429 /**
 430   * @}
 431   */
 432
 433 /** @defgroup FLASH_Group3 Option Bytes Programming functions
 434  *  @brief   Option Bytes Programming functions
 435  *
 436 @verbatim
 437  ===============================================================================
 438                 ##### Option Bytes Programming functions #####
 439  ===============================================================================
 440     [..] This group includes the following functions:
 441          (+) void FLASH_OB_Unlock(void);
 442          (+) void FLASH_OB_Lock(void);
 443          (+) void FLASH_OB_Erase(void);
 444          (+) FLASH_Status FLASH_OB_WRPConfig(uint32_t OB_WRP, FunctionalState NewState);
 445          (+) FLASH_Status FLASH_OB_RDPConfig(uint8_t OB_RDP);
 446          (+) FLASH_Status FLASH_OB_UserConfig(uint8_t OB_IWDG, uint8_t OB_STOP, uint8_t OB_STDBY);
 447          (+) FLASH_Status FLASH_OB_BOOTConfig(uint8_t OB_BOOT1);
 448          (+) FLASH_Status FLASH_OB_VDDAConfig(uint8_t OB_VDDA_ANALOG);
 449          (+) FLASH_Status FLASH_OB_SRMParityConfig(uint8_t OB_SRAM_Parity);
 450          (+) FLASH_Status FLASH_OB_WriteUser(uint8_t OB_USER);
 451          (+) FLASH_Status FLASH_OB_Launch(void);
 452          (+) uint32_t FLASH_OB_GetUser(void);
 453          (+) uint8_t FLASH_OB_GetWRP(void);
 454          (+) uint8_t FLASH_OB_GetRDP(void);
 455     [..] Any operation of erase or program should follow these steps:
 456          (#) Call the FLASH_OB_Unlock() function to enable the FLASH option control
 457              register access.
 458          (#) Call one or several functions to program the desired Option Bytes:
 459              (++) void FLASH_OB_WRPConfig(uint32_t OB_WRP, FunctionalState NewState);
 460                   => to Enable/Disable the desired sector write protection.
 461              (++) FLASH_Status FLASH_OB_RDPConfig(uint8_t OB_RDP) => to set the
 462                   desired read Protection Level.
 463              (++) FLASH_Status FLASH_OB_UserConfig(uint8_t OB_IWDG, uint8_t OB_STOP, uint8_t OB_STDBY);
 464                   => to configure the user Option Bytes.
 465                  (++) FLASH_Status FLASH_OB_BOOTConfig(uint8_t OB_BOOT1);
 466                   => to set the boot1 mode
 467              (++) FLASH_Status FLASH_OB_VDDAConfig(uint8_t OB_VDDA_ANALOG);
 468                   => to Enable/Disable the VDDA monotoring.
 469              (++) FLASH_Status FLASH_OB_SRMParityConfig(uint8_t OB_SRAM_Parity);
 470                   => to Enable/Disable the SRAM Parity check.
 471                  (++) FLASH_Status FLASH_OB_WriteUser(uint8_t OB_USER);
 472                   => to write all user option bytes: OB_IWDG, OB_STOP, OB_STDBY,
 473                      OB_BOOT1, OB_VDDA_ANALOG and OB_VDD_SD12.
 474          (#) Once all needed Option Bytes to be programmed are correctly written,
 475              call the FLASH_OB_Launch() function to launch the Option Bytes
 476              programming process.
 477          (#@) When changing the IWDG mode from HW to SW or from SW to HW, a system
 478               reset is needed to make the change effective.
 479          (#) Call the FLASH_OB_Lock() function to disable the FLASH option control
 480              register access (recommended to protect the Option Bytes against
 481              possible unwanted operations).
 482
 483 @endverbatim
 484   * @{
 485   */
 486
 487 /**
 488   * @brief  Unlocks the option bytes block access.
 489   * @param  None
 490   * @retval None
 491   */
 492 void FLASH_OB_Unlock(void)
 493 {
 494   if((FLASH->CR & FLASH_CR_OPTWRE) == RESET)
 495   {
 496     /* Unlocking the option bytes block access */
 497     FLASH->OPTKEYR = FLASH_OPTKEY1;
 498     FLASH->OPTKEYR = FLASH_OPTKEY2;
 499   }
 500 }
 501
 502 /**
 503   * @brief  Locks the option bytes block access.
 504   * @param  None
 505   * @retval None
 506   */
 507 void FLASH_OB_Lock(void)
 508 {
 509   /* Set the OPTWREN Bit to lock the option bytes block access */
 510   FLASH->CR &= ~FLASH_CR_OPTWRE;
 511 }
 512
 513 /**
 514   * @brief  Launch the option byte loading.
 515   * @param  None
 516   * @retval None
 517   */
 518 void FLASH_OB_Launch(void)
 519 {
 520   /* Set the OBL_Launch bit to launch the option byte loading */
 521   FLASH->CR |= FLASH_CR_OBL_LAUNCH;
 522 }
 523
 524 /**
 525   * @brief  Erases the FLASH option bytes.
 526   * @note   This functions erases all option bytes except the Read protection (RDP).
 527   * @param  None
 528   * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
 529   *         FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
 530   */
 531 FLASH_Status FLASH_OB_Erase(void)
 532 {
 533   uint16_t rdptmp = OB_RDP_Level_0;
 534
 535   FLASH_Status status = FLASH_COMPLETE;
 536
 537   /* Get the actual read protection Option Byte value */
 538   if(FLASH_OB_GetRDP() != RESET)
 539   {
 540     rdptmp = 0x00;
 541   }
 542
 543   /* Wait for last operation to be completed */
 544   status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 545
 546   if(status == FLASH_COMPLETE)
 547   {
 548     /* If the previous operation is completed, proceed to erase the option bytes */
 549     FLASH->CR |= FLASH_CR_OPTER;
 550     FLASH->CR |= FLASH_CR_STRT;
 551
 552     /* Wait for last operation to be completed */
 553     status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 554
 555     if(status == FLASH_COMPLETE)
 556     {
 557       /* If the erase operation is completed, disable the OPTER Bit */
 558       FLASH->CR &= ~FLASH_CR_OPTER;
 559
 560       /* Enable the Option Bytes Programming operation */
 561       FLASH->CR |= FLASH_CR_OPTPG;
 562
 563       /* Restore the last read protection Option Byte value */
 564       OB->RDP = (uint16_t)rdptmp;
 565
 566       /* Wait for last operation to be completed */
 567       status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 568
 569       if(status != FLASH_TIMEOUT)
 570       {
 571         /* if the program operation is completed, disable the OPTPG Bit */
 572         FLASH->CR &= ~FLASH_CR_OPTPG;
 573       }
 574     }
 575     else
 576     {
 577       if (status != FLASH_TIMEOUT)
 578       {
 579         /* Disable the OPTPG Bit */
 580         FLASH->CR &= ~FLASH_CR_OPTPG;
 581       }
 582     }
 583   }
 584   /* Return the erase status */
 585   return status;
 586 }
 587
 588 /**
 589   * @brief  Write protects the desired pages
 590   * @note   To correctly run this function, the FLASH_OB_Unlock() function
 591   *         must be called before.
 592   * @note   Call the FLASH_OB_Lock() to disable the flash control register access and the option bytes
 593   *         (recommended to protect the FLASH memory against possible unwanted operation)
 594   * @param  OB_WRP: specifies the address of the pages to be write protected.
 595   *   This parameter can be:
 596   *     @arg  value between OB_WRP_Pages0to35 and OB_WRP_Pages60to63
 597   *     @arg OB_WRP_AllPages
 598   * @retval FLASH Status: The returned value can be:
 599   *         FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
 600   */
 601 FLASH_Status FLASH_OB_EnableWRP(uint32_t OB_WRP)
 602 {
 603   uint16_t WRP0_Data = 0xFFFF, WRP1_Data = 0xFFFF;
 604
 605   FLASH_Status status = FLASH_COMPLETE;
 606
 607   /* Check the parameters */
 608   assert_param(IS_OB_WRP(OB_WRP));
 609
 610   OB_WRP = (uint32_t)(~OB_WRP);
 611   WRP0_Data = (uint16_t)(OB_WRP & OB_WRP0_WRP0);
 612   WRP1_Data = (uint16_t)((OB_WRP & OB_WRP0_nWRP0) >> 8);
 613
 614   /* Wait for last operation to be completed */
 615   status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 616
 617   if(status == FLASH_COMPLETE)
 618   {
 619     FLASH->CR |= FLASH_CR_OPTPG;
 620
 621     if(WRP0_Data != 0xFF)
 622     {
 623       OB->WRP0 = WRP0_Data;
 624
 625       /* Wait for last operation to be completed */
 626       status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 627     }
 628     if((status == FLASH_COMPLETE) && (WRP1_Data != 0xFF))
 629     {
 630       OB->WRP1 = WRP1_Data;
 631
 632       /* Wait for last operation to be completed */
 633       status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 634     }
 635     if(status != FLASH_TIMEOUT)
 636     {
 637       /* if the program operation is completed, disable the OPTPG Bit */
 638       FLASH->CR &= ~FLASH_CR_OPTPG;
 639     }
 640   }
 641   /* Return the write protection operation Status */
 642   return status;
 643 }
 644
 645 /**
 646   * @brief  Enables or disables the read out protection.
 647   * @note   To correctly run this function, the FLASH_OB_Unlock() function
 648   *         must be called before.
 649   * @note   Call the FLASH_OB_Lock() to disable the flash control register access and the option bytes
 650   *         (recommended to protect the FLASH memory against possible unwanted operation)
 651   * @param  FLASH_ReadProtection_Level: specifies the read protection level.
 652   *   This parameter can be:
 653   *     @arg OB_RDP_Level_0: No protection
 654   *     @arg OB_RDP_Level_1: Read protection of the memory
 655   *     @arg OB_RDP_Level_2: Chip protection
 656   *     @retval FLASH Status: The returned value can be:
 657   * FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
 658   */
 659 FLASH_Status FLASH_OB_RDPConfig(uint8_t OB_RDP)
 660 {
 661   FLASH_Status status = FLASH_COMPLETE;
 662
 663   /* Check the parameters */
 664   assert_param(IS_OB_RDP(OB_RDP));
 665   status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 666
 667   if(status == FLASH_COMPLETE)
 668   {
 669     FLASH->CR |= FLASH_CR_OPTER;
 670     FLASH->CR |= FLASH_CR_STRT;
 671
 672     /* Wait for last operation to be completed */
 673     status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 674
 675     if(status == FLASH_COMPLETE)
 676     {
 677       /* If the erase operation is completed, disable the OPTER Bit */
 678       FLASH->CR &= ~FLASH_CR_OPTER;
 679
 680       /* Enable the Option Bytes Programming operation */
 681       FLASH->CR |= FLASH_CR_OPTPG;
 682
 683       OB->RDP = OB_RDP;
 684
 685       /* Wait for last operation to be completed */
 686       status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 687
 688       if(status != FLASH_TIMEOUT)
 689       {
 690         /* if the program operation is completed, disable the OPTPG Bit */
 691         FLASH->CR &= ~FLASH_CR_OPTPG;
 692       }
 693     }
 694     else
 695     {
 696       if(status != FLASH_TIMEOUT)
 697       {
 698         /* Disable the OPTER Bit */
 699         FLASH->CR &= ~FLASH_CR_OPTER;
 700       }
 701     }
 702   }
 703   /* Return the protection operation Status */
 704   return status;
 705 }
 706
 707 /**
 708   * @brief  Programs the FLASH User Option Byte: IWDG_SW / RST_STOP / RST_STDBY.
 709   * @param  OB_IWDG: Selects the IWDG mode
 710   *   This parameter can be one of the following values:
 711   *     @arg OB_IWDG_SW: Software IWDG selected
 712   *     @arg OB_IWDG_HW: Hardware IWDG selected
 713   * @param  OB_STOP: Reset event when entering STOP mode.
 714   *   This parameter can be one of the following values:
 715   *     @arg OB_STOP_NoRST: No reset generated when entering in STOP
 716   *     @arg OB_STOP_RST: Reset generated when entering in STOP
 717   * @param  OB_STDBY: Reset event when entering Standby mode.
 718   *   This parameter can be one of the following values:
 719   *     @arg OB_STDBY_NoRST: No reset generated when entering in STANDBY
 720   *     @arg OB_STDBY_RST: Reset generated when entering in STANDBY
 721   * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
 722   *         FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
 723   */
 724 FLASH_Status FLASH_OB_UserConfig(uint8_t OB_IWDG, uint8_t OB_STOP, uint8_t OB_STDBY)
 725 {
 726   FLASH_Status status = FLASH_COMPLETE;
 727
 728   /* Check the parameters */
 729   assert_param(IS_OB_IWDG_SOURCE(OB_IWDG));
 730   assert_param(IS_OB_STOP_SOURCE(OB_STOP));
 731   assert_param(IS_OB_STDBY_SOURCE(OB_STDBY));
 732
 733   /* Authorize the small information block programming */
 734   FLASH->OPTKEYR = FLASH_KEY1;
 735   FLASH->OPTKEYR = FLASH_KEY2;
 736
 737   /* Wait for last operation to be completed */
 738   status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 739
 740   if(status == FLASH_COMPLETE)
 741   {
 742     /* Enable the Option Bytes Programming operation */
 743     FLASH->CR |= FLASH_CR_OPTPG;
 744
 745     OB->USER = (uint8_t)((uint8_t)(OB_IWDG | OB_STOP) | (uint8_t)(OB_STDBY |0xF8));
 746
 747     /* Wait for last operation to be completed */
 748     status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 749
 750     if(status != FLASH_TIMEOUT)
 751     {
 752       /* if the program operation is completed, disable the OPTPG Bit */
 753       FLASH->CR &= ~FLASH_CR_OPTPG;
 754     }
 755   }
 756   /* Return the Option Byte program Status */
 757   return status;
 758 }
 759
 760 /**
 761   * @brief  Sets or resets the BOOT1.
 762   * @param  OB_BOOT1: Set or Reset the BOOT1.
 763   *   This parameter can be one of the following values:
 764   *     @arg OB_BOOT1_RESET: BOOT1 Reset
 765   *     @arg OB_BOOT1_SET: BOOT1 Set
 766   * @retval None
 767   */
 768 FLASH_Status FLASH_OB_BOOTConfig(uint8_t OB_BOOT1)
 769 {
 770   FLASH_Status status = FLASH_COMPLETE;
 771
 772   /* Check the parameters */
 773   assert_param(IS_OB_BOOT1(OB_BOOT1));
 774
 775   /* Authorize the small information block programming */
 776   FLASH->OPTKEYR = FLASH_KEY1;
 777   FLASH->OPTKEYR = FLASH_KEY2;
 778
 779   /* Wait for last operation to be completed */
 780   status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 781
 782   if(status == FLASH_COMPLETE)
 783   {
 784     /* Enable the Option Bytes Programming operation */
 785     FLASH->CR |= FLASH_CR_OPTPG;
 786
 787         OB->USER = OB_BOOT1|0xEF;
 788
 789     /* Wait for last operation to be completed */
 790     status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 791
 792     if(status != FLASH_TIMEOUT)
 793     {
 794       /* if the program operation is completed, disable the OPTPG Bit */
 795       FLASH->CR &= ~FLASH_CR_OPTPG;
 796     }
 797   }
 798   /* Return the Option Byte program Status */
 799   return status;
 800 }
 801
 802 /**
 803   * @brief  Sets or resets the analogue monitoring on VDDA Power source.
 804   * @param  OB_VDDA_ANALOG: Selects the analog monitoring on VDDA Power source.
 805   *   This parameter can be one of the following values:
 806   *     @arg OB_VDDA_ANALOG_ON: Analog monitoring on VDDA Power source ON
 807   *     @arg OB_VDDA_ANALOG_OFF: Analog monitoring on VDDA Power source OFF
 808   * @retval None
 809   */
 810 FLASH_Status FLASH_OB_VDDAConfig(uint8_t OB_VDDA_ANALOG)
 811 {
 812   FLASH_Status status = FLASH_COMPLETE;
 813
 814   /* Check the parameters */
 815   assert_param(IS_OB_VDDA_ANALOG(OB_VDDA_ANALOG));
 816
 817   /* Authorize the small information block programming */
 818   FLASH->OPTKEYR = FLASH_KEY1;
 819   FLASH->OPTKEYR = FLASH_KEY2;
 820
 821   /* Wait for last operation to be completed */
 822   status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 823
 824   if(status == FLASH_COMPLETE)
 825   {
 826     /* Enable the Option Bytes Programming operation */
 827     FLASH->CR |= FLASH_CR_OPTPG;
 828
 829         OB->USER = OB_VDDA_ANALOG |0xDF;
 830
 831     /* Wait for last operation to be completed */
 832     status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 833
 834     if(status != FLASH_TIMEOUT)
 835     {
 836       /* if the program operation is completed, disable the OPTPG Bit */
 837       FLASH->CR &= ~FLASH_CR_OPTPG;
 838     }
 839   }
 840   /* Return the Option Byte program Status */
 841   return status;
 842 }
 843
 844 /**
 845   * @brief  Sets or resets the SRAM partiy.
 846   * @param  OB_SRAM_Parity: Set or Reset the SRAM partiy enable bit.
 847   *         This parameter can be one of the following values:
 848   *             @arg OB_SRAM_PARITY_SET: Set SRAM partiy.
 849   *             @arg OB_SRAM_PARITY_RESET: Reset SRAM partiy.
 850   * @retval None
 851   */
 852 FLASH_Status FLASH_OB_SRAMParityConfig(uint8_t OB_SRAM_Parity)
 853 {
 854   FLASH_Status status = FLASH_COMPLETE;
 855
 856   /* Check the parameters */
 857   assert_param(IS_OB_SRAM_PARITY(OB_SRAM_Parity));
 858
 859   /* Wait for last operation to be completed */
 860   status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 861
 862   if(status == FLASH_COMPLETE)
 863   {
 864     /* Enable the Option Bytes Programming operation */
 865     FLASH->CR |= FLASH_CR_OPTPG;
 866
 867     OB->USER = OB_SRAM_Parity | 0xBF;
 868
 869     /* Wait for last operation to be completed */
 870     status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 871
 872     if(status != FLASH_TIMEOUT)
 873     {
 874       /* if the program operation is completed, disable the OPTPG Bit */
 875       FLASH->CR &= ~FLASH_CR_OPTPG;
 876     }
 877   }
 878   /* Return the Option Byte program Status */
 879   return status;
 880 }
 881
 882 /**
 883   * @brief  Programs the FLASH User Option Byte: IWDG_SW / RST_STOP / RST_STDBY/ BOOT1 and OB_VDDA_ANALOG.
 884   * @note   To correctly run this function, the FLASH_OB_Unlock() function
 885   *         must be called before.
 886   * @note   Call the FLASH_OB_Lock() to disable the flash control register access and the option bytes
 887   *         (recommended to protect the FLASH memory against possible unwanted operation)
 888   * @param  OB_USER: Selects all user option bytes
 889   *   This parameter is a combination of the following values:
 890   *     @arg OB_IWDG_SW / OB_IWDG_HW: Software / Hardware WDG selected
 891   *     @arg OB_STOP_NoRST / OB_STOP_RST: No reset / Reset generated when entering in STOP
 892   *     @arg OB_STDBY_NoRST / OB_STDBY_RST: No reset / Reset generated when entering in STANDBY
 893   *     @arg OB_BOOT1_RESET / OB_BOOT1_SET: BOOT1 Reset / Set
 894   *     @arg OB_VDDA_ANALOG_ON / OB_VDDA_ANALOG_OFF: Analog monitoring on VDDA Power source ON / OFF
 895   * @retval FLASH Status: The returned value can be:
 896   * FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
 897   */
 898 FLASH_Status FLASH_OB_WriteUser(uint8_t OB_USER)
 899 {
 900   FLASH_Status status = FLASH_COMPLETE;
 901
 902   /* Authorize the small information block programming */
 903   FLASH->OPTKEYR = FLASH_KEY1;
 904   FLASH->OPTKEYR = FLASH_KEY2;
 905
 906   /* Wait for last operation to be completed */
 907   status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 908
 909   if(status == FLASH_COMPLETE)
 910   {
 911     /* Enable the Option Bytes Programming operation */
 912     FLASH->CR |= FLASH_CR_OPTPG;
 913
 914           OB->USER = OB_USER | 0x88;
 915
 916     /* Wait for last operation to be completed */
 917     status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 918
 919     if(status != FLASH_TIMEOUT)
 920     {
 921       /* if the program operation is completed, disable the OPTPG Bit */
 922       FLASH->CR &= ~FLASH_CR_OPTPG;
 923     }
 924   }
 925   /* Return the Option Byte program Status */
 926   return status;
 927
 928 }
 929
 930 /**
 931   * @brief  Programs a half word at a specified Option Byte Data address.
 932   * @note    To correctly run this function, the FLASH_OB_Unlock() function
 933   *           must be called before.
 934   *          Call the FLASH_OB_Lock() to disable the flash control register access and the option bytes
 935   *          (recommended to protect the FLASH memory against possible unwanted operation)
 936   * @param  Address: specifies the address to be programmed.
 937   *   This parameter can be 0x1FFFF804 or 0x1FFFF806.
 938   * @param  Data: specifies the data to be programmed.
 939   * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
 940   *         FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
 941   */
 942 FLASH_Status FLASH_ProgramOptionByteData(uint32_t Address, uint8_t Data)
 943 {
 944   FLASH_Status status = FLASH_COMPLETE;
 945   /* Check the parameters */
 946   assert_param(IS_OB_DATA_ADDRESS(Address));
 947   status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 948
 949   if(status == FLASH_COMPLETE)
 950   {
 951     /* Enables the Option Bytes Programming operation */
 952     FLASH->CR |= FLASH_CR_OPTPG;
 953     *(__IO uint16_t*)Address = Data;
 954
 955     /* Wait for last operation to be completed */
 956     status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 957
 958     if(status != FLASH_TIMEOUT)
 959     {
 960       /* If the program operation is completed, disable the OPTPG Bit */
 961       FLASH->CR &= ~FLASH_CR_OPTPG;
 962     }
 963   }
 964   /* Return the Option Byte Data Program Status */
 965   return status;
 966 }
 967
 968 /**
 969   * @brief  Returns the FLASH User Option Bytes values.
 970   * @param  None
 971   * @retval The FLASH User Option Bytes .
 972   */
 973 uint8_t FLASH_OB_GetUser(void)
 974 {
 975   /* Return the User Option Byte */
 976   return (uint8_t)(FLASH->OBR >> 8);
 977 }
 978
 979 /**
 980   * @brief  Returns the FLASH Write Protection Option Bytes value.
 981   * @param  None
 982   * @retval The FLASH Write Protection Option Bytes value
 983   */
 984 uint32_t FLASH_OB_GetWRP(void)
 985 {
 986   /* Return the FLASH write protection Register value */
 987   return (uint32_t)(FLASH->WRPR);
 988 }
 989
 990 /**
 991   * @brief  Checks whether the FLASH Read out Protection Status is set or not.
 992   * @param  None
 993   * @retval FLASH ReadOut Protection Status(SET or RESET)
 994   */
 995 FlagStatus FLASH_OB_GetRDP(void)
 996 {
 997   FlagStatus readstatus = RESET;
 998
 999   if ((uint8_t)(FLASH->OBR & (FLASH_OBR_RDPRT1 | FLASH_OBR_RDPRT2)) != RESET)
1000   {
1001     readstatus = SET;
1002   }
1003   else
1004   {
1005     readstatus = RESET;
1006   }
1007   return readstatus;
1008 }
1009
1010 /**
1011   * @}
1012   */
1013
1014 /** @defgroup FLASH_Group4 Interrupts and flags management functions
1015  *  @brief   Interrupts and flags management functions
1016  *
1017 @verbatim
1018  ===============================================================================
1019              ##### Interrupts and flags management functions #####
1020  ===============================================================================
1021
1022 @endverbatim
1023   * @{
1024   */
1025
1026 /**
1027   * @brief  Enables or disables the specified FLASH interrupts.
1028   * @param  FLASH_IT: specifies the FLASH interrupt sources to be enabled or
1029   *         disabled.
1030   *   This parameter can be any combination of the following values:
1031   *     @arg FLASH_IT_EOP: FLASH end of programming Interrupt
1032   *     @arg FLASH_IT_ERR: FLASH Error Interrupt
1033   * @retval None
1034   */
1035 void FLASH_ITConfig(uint32_t FLASH_IT, FunctionalState NewState)
1036 {
1037   /* Check the parameters */
1038   assert_param(IS_FLASH_IT(FLASH_IT));
1039   assert_param(IS_FUNCTIONAL_STATE(NewState));
1040
1041   if(NewState != DISABLE)
1042   {
1043     /* Enable the interrupt sources */
1044     FLASH->CR |= FLASH_IT;
1045   }
1046   else
1047   {
1048     /* Disable the interrupt sources */
1049     FLASH->CR &= ~(uint32_t)FLASH_IT;
1050   }
1051 }
1052
1053 /**
1054   * @brief  Checks whether the specified FLASH flag is set or not.
1055   * @param  FLASH_FLAG: specifies the FLASH flag to check.
1056   *   This parameter can be one of the following values:
1057   *     @arg FLASH_FLAG_BSY: FLASH write/erase operations in progress flag
1058   *     @arg FLASH_FLAG_PGERR: FLASH Programming error flag flag
1059   *     @arg FLASH_FLAG_WRPERR: FLASH Write protected error flag
1060   *     @arg FLASH_FLAG_EOP: FLASH End of Programming flag
1061   * @retval The new state of FLASH_FLAG (SET or RESET).
1062   */
1063 FlagStatus FLASH_GetFlagStatus(uint32_t FLASH_FLAG)
1064 {
1065   FlagStatus bitstatus = RESET;
1066
1067   /* Check the parameters */
1068   assert_param(IS_FLASH_GET_FLAG(FLASH_FLAG));
1069
1070   if((FLASH->SR & FLASH_FLAG) != (uint32_t)RESET)
1071   {
1072     bitstatus = SET;
1073   }
1074   else
1075   {
1076     bitstatus = RESET;
1077   }
1078   /* Return the new state of FLASH_FLAG (SET or RESET) */
1079   return bitstatus;
1080 }
1081
1082 /**
1083   * @brief  Clears the FLASH's pending flags.
1084   * @param  FLASH_FLAG: specifies the FLASH flags to clear.
1085   *   This parameter can be any combination of the following values:
1086   *     @arg FLASH_FLAG_PGERR: FLASH Programming error flag flag
1087   *     @arg FLASH_FLAG_WRPERR: FLASH Write protected error flag
1088   *     @arg FLASH_FLAG_EOP: FLASH End of Programming flag
1089   * @retval None
1090   */
1091 void FLASH_ClearFlag(uint32_t FLASH_FLAG)
1092 {
1093   /* Check the parameters */
1094   assert_param(IS_FLASH_CLEAR_FLAG(FLASH_FLAG));
1095
1096   /* Clear the flags */
1097   FLASH->SR = FLASH_FLAG;
1098 }
1099
1100 /**
1101   * @brief  Returns the FLASH Status.
1102   * @param  None
1103   * @retval FLASH Status: The returned value can be:
1104   *         FLASH_BUSY, FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP or FLASH_COMPLETE.
1105   */
1106 FLASH_Status FLASH_GetStatus(void)
1107 {
1108   FLASH_Status FLASHstatus = FLASH_COMPLETE;
1109
1110   if((FLASH->SR & FLASH_FLAG_BSY) == FLASH_FLAG_BSY)
1111   {
1112     FLASHstatus = FLASH_BUSY;
1113   }
1114   else
1115   {
1116     if((FLASH->SR & (uint32_t)FLASH_FLAG_WRPERR)!= (uint32_t)0x00)
1117     {
1118       FLASHstatus = FLASH_ERROR_WRP;
1119     }
1120     else
1121     {
1122       if((FLASH->SR & (uint32_t)(FLASH_SR_PGERR)) != (uint32_t)0x00)
1123       {
1124         FLASHstatus = FLASH_ERROR_PROGRAM;
1125       }
1126       else
1127       {
1128         FLASHstatus = FLASH_COMPLETE;
1129       }
1130     }
1131   }
1132   /* Return the FLASH Status */
1133   return FLASHstatus;
1134 }
1135
1136 /**
1137   * @brief  Waits for a FLASH operation to complete or a TIMEOUT to occur.
1138   * @param  Timeout: FLASH programming Timeout
1139   * @retval FLASH Status: The returned value can be: FLASH_BUSY,
1140   *         FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
1141   */
1142 FLASH_Status FLASH_WaitForLastOperation(uint32_t Timeout)
1143 {
1144   FLASH_Status status = FLASH_COMPLETE;
1145
1146   /* Check for the FLASH Status */
1147   status = FLASH_GetStatus();
1148
1149   /* Wait for a FLASH operation to complete or a TIMEOUT to occur */
1150   while((status == FLASH_BUSY) && (Timeout != 0x00))
1151   {
1152     status = FLASH_GetStatus();
1153     Timeout--;
1154   }
1155
1156   if(Timeout == 0x00 )
1157   {
1158     status = FLASH_TIMEOUT;
1159   }
1160   /* Return the operation status */
1161   return status;
1162 }
1163
1164 /**
1165   * @}
1166   */
1167
1168 /**
1169   * @}
1170   */
1171
1172 /**
1173   * @}
1174   */
1175
1176 /**
1177   * @}
1178   */
1179
1180 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/