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Diff: targets/cmsis/TARGET_STM/TARGET_DISCO_F303VC/stm32f30x_flash.c
- Revision:
- 157:90e3acc479a2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/cmsis/TARGET_STM/TARGET_DISCO_F303VC/stm32f30x_flash.c Fri Apr 11 17:15:06 2014 +0100
@@ -0,0 +1,1180 @@
+/**
+ ******************************************************************************
+ * @file stm32f30x_flash.c
+ * @author MCD Application Team
+ * @version V1.1.0
+ * @date 27-February-2014
+ * @brief This file provides firmware functions to manage the following
+ * functionalities of the FLASH peripheral:
+ * + FLASH Interface configuration
+ * + FLASH Memory Programming
+ * + Option Bytes Programming
+ * + Interrupts and flags management
+ *
+ @verbatim
+
+ ===============================================================================
+ ##### How to use this driver #####
+ ===============================================================================
+ [..] This driver provides functions to configure and program the FLASH
+ memory of all STM32F30x devices. These functions are split in 4 groups:
+ (#) FLASH Interface configuration functions: this group includes the
+ management of following features:
+ (++) Set the latency.
+ (++) Enable/Disable the Half Cycle Access.
+ (++) Enable/Disable the prefetch buffer.
+ (#) FLASH Memory Programming functions: this group includes all needed
+ functions to erase and program the main memory:
+ (++) Lock and Unlock the FLASH interface.
+ (++) Erase function: Erase page, erase all pages.
+ (++) Program functions: Half Word and Word write.
+ (#) FLASH Option Bytes Programming functions: this group includes all
+ needed functions to manage the Option Bytes:
+ (++) Lock and Unlock the Flash Option bytes.
+ (++) Launch the Option Bytes loader
+ (++) Erase the Option Bytes
+ (++) Set/Reset the write protection
+ (++) Set the Read protection Level
+ (++) Program the user option Bytes
+ (++) Set/Reset the BOOT1 bit
+ (++) Enable/Disable the VDDA Analog Monitoring
+ (++) Enable/Disable the SRAM parity
+ (++) Get the user option bytes
+ (++) Get the Write protection
+ (++) Get the read protection status
+ (#) FLASH Interrupts and flags management functions: this group includes
+ all needed functions to:
+ (++) Enable/Disable the FLASH interrupt sources.
+ (++) Get flags status.
+ (++) Clear flags.
+ (++) Get FLASH operation status.
+ (++) Wait for last FLASH operation.
+
+ @endverbatim
+
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© 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 "stm32f30x_flash.h"
+
+/** @addtogroup STM32F30x_StdPeriph_Driver
+ * @{
+ */
+
+/** @defgroup FLASH
+ * @brief FLASH driver modules
+ * @{
+ */
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+
+/* FLASH Mask */
+#define RDPRT_MASK ((uint32_t)0x00000002)
+#define WRP01_MASK ((uint32_t)0x0000FFFF)
+#define WRP23_MASK ((uint32_t)0xFFFF0000)
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/** @defgroup FLASH_Private_Functions
+ * @{
+ */
+
+/** @defgroup FLASH_Group1 FLASH Interface configuration functions
+ * @brief FLASH Interface configuration functions
+ *
+
+@verbatim
+ ===============================================================================
+ ##### FLASH Interface configuration functions #####
+ ===============================================================================
+ [..] This group includes the following functions:
+ (+) void FLASH_SetLatency(uint32_t FLASH_Latency);
+ (+) void FLASH_HalfCycleAccessCmd(uint32_t FLASH_HalfCycleAccess);
+ (+) void FLASH_PrefetchBufferCmd(FunctionalState NewState);
+ [..] The unlock sequence is not needed for these functions.
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Sets the code latency value.
+ * @param FLASH_Latency: specifies the FLASH Latency value.
+ * This parameter can be one of the following values:
+ * @arg FLASH_Latency_0: FLASH Zero Latency cycle
+ * @arg FLASH_Latency_1: FLASH One Latency cycle
+ * @arg FLASH_Latency_2: FLASH Two Latency cycles
+ * @retval None
+ */
+void FLASH_SetLatency(uint32_t FLASH_Latency)
+{
+ uint32_t tmpreg = 0;
+
+ /* Check the parameters */
+ assert_param(IS_FLASH_LATENCY(FLASH_Latency));
+
+ /* Read the ACR register */
+ tmpreg = FLASH->ACR;
+
+ /* Sets the Latency value */
+ tmpreg &= (uint32_t) (~((uint32_t)FLASH_ACR_LATENCY));
+ tmpreg |= FLASH_Latency;
+
+ /* Write the ACR register */
+ FLASH->ACR = tmpreg;
+}
+
+/**
+ * @brief Enables or disables the Half cycle flash access.
+ * @param FLASH_HalfCycleAccess: specifies the FLASH Half cycle Access mode.
+ * This parameter can be one of the following values:
+ * @arg FLASH_HalfCycleAccess_Enable: FLASH Half Cycle Enable
+ * @arg FLASH_HalfCycleAccess_Disable: FLASH Half Cycle Disable
+ * @retval None
+ */
+void FLASH_HalfCycleAccessCmd(FunctionalState NewState)
+{
+ /* Check the parameters */
+ assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+ if(NewState != DISABLE)
+ {
+ FLASH->ACR |= FLASH_ACR_HLFCYA;
+ }
+ else
+ {
+ FLASH->ACR &= (uint32_t)(~((uint32_t)FLASH_ACR_HLFCYA));
+ }
+}
+
+/**
+ * @brief Enables or disables the Prefetch Buffer.
+ * @param NewState: new state of the Prefetch Buffer.
+ * This parameter can be: ENABLE or DISABLE.
+ * @retval None
+ */
+void FLASH_PrefetchBufferCmd(FunctionalState NewState)
+{
+ /* Check the parameters */
+ assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+ if(NewState != DISABLE)
+ {
+ FLASH->ACR |= FLASH_ACR_PRFTBE;
+ }
+ else
+ {
+ FLASH->ACR &= (uint32_t)(~((uint32_t)FLASH_ACR_PRFTBE));
+ }
+}
+
+/**
+ * @}
+ */
+
+/** @defgroup FLASH_Group2 FLASH Memory Programming functions
+ * @brief FLASH Memory Programming functions
+ *
+@verbatim
+ ===============================================================================
+ ##### FLASH Memory Programming functions #####
+ ===============================================================================
+ [..] This group includes the following functions:
+ (+) void FLASH_Unlock(void);
+ (+) void FLASH_Lock(void);
+ (+) FLASH_Status FLASH_ErasePage(uint32_t Page_Address);
+ (+) FLASH_Status FLASH_EraseAllPages(void);
+ (+) FLASH_Status FLASH_ProgramWord(uint32_t Address, uint32_t Data);
+ (+) FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t Data);
+ [..] Any operation of erase or program should follow these steps:
+ (#) Call the FLASH_Unlock() function to enable the FLASH control register
+ program memory access.
+ (#) Call the desired function to erase page or program data.
+ (#) Call the FLASH_Lock() function to disable the FLASH control register
+ access (recommended to protect the FLASH memory against possible
+ unwanted operation).
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Unlocks the FLASH control register access
+ * @param None
+ * @retval None
+ */
+void FLASH_Unlock(void)
+{
+ if((FLASH->CR & FLASH_CR_LOCK) != RESET)
+ {
+ /* Authorize the FLASH Registers access */
+ FLASH->KEYR = FLASH_KEY1;
+ FLASH->KEYR = FLASH_KEY2;
+ }
+}
+
+/**
+ * @brief Locks the FLASH control register access
+ * @param None
+ * @retval None
+ */
+void FLASH_Lock(void)
+{
+ /* Set the LOCK Bit to lock the FLASH Registers access */
+ FLASH->CR |= FLASH_CR_LOCK;
+}
+
+/**
+ * @brief Erases a specified page in program memory.
+ * @note To correctly run this function, the FLASH_Unlock() function
+ * must be called before.
+ * @note Call the 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 1024 bytes).
+ * @retval FLASH Status: The returned value can be:
+ * FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_ErasePage(uint32_t Page_Address)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+
+ /* Check the parameters */
+ assert_param(IS_FLASH_PROGRAM_ADDRESS(Page_Address));
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* If the previous operation is completed, proceed to erase the page */
+ FLASH->CR |= FLASH_CR_PER;
+ FLASH->AR = Page_Address;
+ FLASH->CR |= FLASH_CR_STRT;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ /* Disable the PER Bit */
+ FLASH->CR &= ~FLASH_CR_PER;
+ }
+
+ /* Return the Erase Status */
+ return status;
+}
+
+/**
+ * @brief Erases all FLASH pages.
+ * @note To correctly run this function, the FLASH_Unlock() function
+ * must be called before.
+ * all the FLASH_Lock() to disable the flash memory access
+ * (recommended to protect the FLASH memory against possible unwanted operation)
+ * @param None
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_EraseAllPages(void)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* if the previous operation is completed, proceed to erase all pages */
+ FLASH->CR |= FLASH_CR_MER;
+ FLASH->CR |= FLASH_CR_STRT;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ /* Disable the MER Bit */
+ FLASH->CR &= ~FLASH_CR_MER;
+ }
+
+ /* Return the Erase Status */
+ return status;
+}
+
+/**
+ * @brief Programs a word at a specified address.
+ * @note To correctly run this function, the FLASH_Unlock() function
+ * must be called before.
+ * Call the FLASH_Lock() to disable the flash memory access
+ * (recommended to protect the FLASH memory against possible unwanted operation)
+ * @param Address: specifies the address to be programmed.
+ * @param Data: specifies the data to be programmed.
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_ProgramWord(uint32_t Address, uint32_t Data)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+ __IO uint32_t tmp = 0;
+
+ /* Check the parameters */
+ assert_param(IS_FLASH_PROGRAM_ADDRESS(Address));
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* If the previous operation is completed, proceed to program the new first
+ half word */
+ FLASH->CR |= FLASH_CR_PG;
+
+ *(__IO uint16_t*)Address = (uint16_t)Data;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* If the previous operation is completed, proceed to program the new second
+ half word */
+ tmp = Address + 2;
+
+ *(__IO uint16_t*) tmp = Data >> 16;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ /* Disable the PG Bit */
+ FLASH->CR &= ~FLASH_CR_PG;
+ }
+ else
+ {
+ /* Disable the PG Bit */
+ FLASH->CR &= ~FLASH_CR_PG;
+ }
+ }
+
+ /* Return the Program Status */
+ return status;
+}
+
+/**
+ * @brief Programs a half word at a specified address.
+ * @note To correctly run this function, the FLASH_Unlock() function
+ * must be called before.
+ * Call the FLASH_Lock() to disable the flash memory access
+ * (recommended to protect the FLASH memory against possible unwanted operation)
+ * @param Address: specifies the address to be programmed.
+ * @param Data: specifies the data to be programmed.
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t Data)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+
+ /* Check the parameters */
+ assert_param(IS_FLASH_PROGRAM_ADDRESS(Address));
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* If the previous operation is completed, proceed to program the new data */
+ FLASH->CR |= FLASH_CR_PG;
+
+ *(__IO uint16_t*)Address = Data;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ /* Disable the PG Bit */
+ FLASH->CR &= ~FLASH_CR_PG;
+ }
+
+ /* Return the Program Status */
+ return status;
+}
+
+/**
+ * @}
+ */
+
+/** @defgroup FLASH_Group3 Option Bytes Programming functions
+ * @brief Option Bytes Programming functions
+ *
+@verbatim
+ ===============================================================================
+ ##### Option Bytes Programming functions #####
+ ===============================================================================
+ [..] This group includes the following functions:
+ (+) void FLASH_OB_Unlock(void);
+ (+) void FLASH_OB_Lock(void);
+ (+) void FLASH_OB_Erase(void);
+ (+) FLASH_Status FLASH_OB_WRPConfig(uint32_t OB_WRP, FunctionalState NewState);
+ (+) FLASH_Status FLASH_OB_RDPConfig(uint8_t OB_RDP);
+ (+) FLASH_Status FLASH_OB_UserConfig(uint8_t OB_IWDG, uint8_t OB_STOP, uint8_t OB_STDBY);
+ (+) FLASH_Status FLASH_OB_BOOTConfig(uint8_t OB_BOOT1);
+ (+) FLASH_Status FLASH_OB_VDDAConfig(uint8_t OB_VDDA_ANALOG);
+ (+) FLASH_Status FLASH_OB_SRMParityConfig(uint8_t OB_SRAM_Parity);
+ (+) FLASH_Status FLASH_OB_WriteUser(uint8_t OB_USER);
+ (+) FLASH_Status FLASH_OB_Launch(void);
+ (+) uint32_t FLASH_OB_GetUser(void);
+ (+) uint8_t FLASH_OB_GetWRP(void);
+ (+) uint8_t FLASH_OB_GetRDP(void);
+ [..] Any operation of erase or program should follow these steps:
+ (#) Call the FLASH_OB_Unlock() function to enable the FLASH option control
+ register access.
+ (#) Call one or several functions to program the desired Option Bytes:
+ (++) void FLASH_OB_WRPConfig(uint32_t OB_WRP, FunctionalState NewState);
+ => to Enable/Disable the desired sector write protection.
+ (++) FLASH_Status FLASH_OB_RDPConfig(uint8_t OB_RDP) => to set the
+ desired read Protection Level.
+ (++) FLASH_Status FLASH_OB_UserConfig(uint8_t OB_IWDG, uint8_t OB_STOP, uint8_t OB_STDBY);
+ => to configure the user Option Bytes.
+ (++) FLASH_Status FLASH_OB_BOOTConfig(uint8_t OB_BOOT1);
+ => to set the boot1 mode
+ (++) FLASH_Status FLASH_OB_VDDAConfig(uint8_t OB_VDDA_ANALOG);
+ => to Enable/Disable the VDDA monotoring.
+ (++) FLASH_Status FLASH_OB_SRMParityConfig(uint8_t OB_SRAM_Parity);
+ => to Enable/Disable the SRAM Parity check.
+ (++) FLASH_Status FLASH_OB_WriteUser(uint8_t OB_USER);
+ => to write all user option bytes: OB_IWDG, OB_STOP, OB_STDBY,
+ OB_BOOT1, OB_VDDA_ANALOG and OB_VDD_SD12.
+ (#) Once all needed Option Bytes to be programmed are correctly written,
+ call the FLASH_OB_Launch() function to launch the Option Bytes
+ programming process.
+ (#@) When changing the IWDG mode from HW to SW or from SW to HW, a system
+ reset is needed to make the change effective.
+ (#) Call the FLASH_OB_Lock() function to disable the FLASH option control
+ register access (recommended to protect the Option Bytes against
+ possible unwanted operations).
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Unlocks the option bytes block access.
+ * @param None
+ * @retval None
+ */
+void FLASH_OB_Unlock(void)
+{
+ if((FLASH->CR & FLASH_CR_OPTWRE) == RESET)
+ {
+ /* Unlocking the option bytes block access */
+ FLASH->OPTKEYR = FLASH_OPTKEY1;
+ FLASH->OPTKEYR = FLASH_OPTKEY2;
+ }
+}
+
+/**
+ * @brief Locks the option bytes block access.
+ * @param None
+ * @retval None
+ */
+void FLASH_OB_Lock(void)
+{
+ /* Set the OPTWREN Bit to lock the option bytes block access */
+ FLASH->CR &= ~FLASH_CR_OPTWRE;
+}
+
+/**
+ * @brief Launch the option byte loading.
+ * @param None
+ * @retval None
+ */
+void FLASH_OB_Launch(void)
+{
+ /* Set the OBL_Launch bit to launch the option byte loading */
+ FLASH->CR |= FLASH_CR_OBL_LAUNCH;
+}
+
+/**
+ * @brief Erases the FLASH option bytes.
+ * @note This functions erases all option bytes except the Read protection (RDP).
+ * @param None
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_OB_Erase(void)
+{
+ uint16_t rdptmp = OB_RDP_Level_0;
+
+ FLASH_Status status = FLASH_COMPLETE;
+
+ /* Get the actual read protection Option Byte value */
+ if(FLASH_OB_GetRDP() != RESET)
+ {
+ rdptmp = 0x00;
+ }
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* If the previous operation is completed, proceed to erase the option bytes */
+ FLASH->CR |= FLASH_CR_OPTER;
+ FLASH->CR |= FLASH_CR_STRT;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* If the erase operation is completed, disable the OPTER Bit */
+ FLASH->CR &= ~FLASH_CR_OPTER;
+
+ /* Enable the Option Bytes Programming operation */
+ FLASH->CR |= FLASH_CR_OPTPG;
+
+ /* Restore the last read protection Option Byte value */
+ OB->RDP = (uint16_t)rdptmp;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status != FLASH_TIMEOUT)
+ {
+ /* if the program operation is completed, disable the OPTPG Bit */
+ FLASH->CR &= ~FLASH_CR_OPTPG;
+ }
+ }
+ else
+ {
+ if (status != FLASH_TIMEOUT)
+ {
+ /* Disable the OPTPG Bit */
+ FLASH->CR &= ~FLASH_CR_OPTPG;
+ }
+ }
+ }
+ /* Return the erase status */
+ return status;
+}
+
+/**
+ * @brief Write protects the desired pages
+ * @note To correctly run this function, the FLASH_OB_Unlock() function
+ * must be called before.
+ * @note Call the FLASH_OB_Lock() to disable the flash control register access and the option bytes
+ * (recommended to protect the FLASH memory against possible unwanted operation)
+ * @param OB_WRP: specifies the address of the pages to be write protected.
+ * This parameter can be:
+ * @arg value between OB_WRP_Pages0to35 and OB_WRP_Pages60to63
+ * @arg OB_WRP_AllPages
+ * @retval FLASH Status: The returned value can be:
+ * FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_OB_EnableWRP(uint32_t OB_WRP)
+{
+ uint16_t WRP0_Data = 0xFFFF, WRP1_Data = 0xFFFF;
+
+ FLASH_Status status = FLASH_COMPLETE;
+
+ /* Check the parameters */
+ assert_param(IS_OB_WRP(OB_WRP));
+
+ OB_WRP = (uint32_t)(~OB_WRP);
+ WRP0_Data = (uint16_t)(OB_WRP & OB_WRP0_WRP0);
+ WRP1_Data = (uint16_t)((OB_WRP & OB_WRP0_nWRP0) >> 8);
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ FLASH->CR |= FLASH_CR_OPTPG;
+
+ if(WRP0_Data != 0xFF)
+ {
+ OB->WRP0 = WRP0_Data;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+ }
+ if((status == FLASH_COMPLETE) && (WRP1_Data != 0xFF))
+ {
+ OB->WRP1 = WRP1_Data;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+ }
+ if(status != FLASH_TIMEOUT)
+ {
+ /* if the program operation is completed, disable the OPTPG Bit */
+ FLASH->CR &= ~FLASH_CR_OPTPG;
+ }
+ }
+ /* Return the write protection operation Status */
+ return status;
+}
+
+/**
+ * @brief Enables or disables the read out protection.
+ * @note To correctly run this function, the FLASH_OB_Unlock() function
+ * must be called before.
+ * @note Call the FLASH_OB_Lock() to disable the flash control register access and the option bytes
+ * (recommended to protect the FLASH memory against possible unwanted operation)
+ * @param FLASH_ReadProtection_Level: specifies the read protection level.
+ * This parameter can be:
+ * @arg OB_RDP_Level_0: No protection
+ * @arg OB_RDP_Level_1: Read protection of the memory
+ * @arg OB_RDP_Level_2: Chip protection
+ * @retval FLASH Status: The returned value can be:
+ * FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_OB_RDPConfig(uint8_t OB_RDP)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+
+ /* Check the parameters */
+ assert_param(IS_OB_RDP(OB_RDP));
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ FLASH->CR |= FLASH_CR_OPTER;
+ FLASH->CR |= FLASH_CR_STRT;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* If the erase operation is completed, disable the OPTER Bit */
+ FLASH->CR &= ~FLASH_CR_OPTER;
+
+ /* Enable the Option Bytes Programming operation */
+ FLASH->CR |= FLASH_CR_OPTPG;
+
+ OB->RDP = OB_RDP;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status != FLASH_TIMEOUT)
+ {
+ /* if the program operation is completed, disable the OPTPG Bit */
+ FLASH->CR &= ~FLASH_CR_OPTPG;
+ }
+ }
+ else
+ {
+ if(status != FLASH_TIMEOUT)
+ {
+ /* Disable the OPTER Bit */
+ FLASH->CR &= ~FLASH_CR_OPTER;
+ }
+ }
+ }
+ /* Return the protection operation Status */
+ return status;
+}
+
+/**
+ * @brief Programs the FLASH User Option Byte: IWDG_SW / RST_STOP / RST_STDBY.
+ * @param OB_IWDG: Selects the IWDG mode
+ * This parameter can be one of the following values:
+ * @arg OB_IWDG_SW: Software IWDG selected
+ * @arg OB_IWDG_HW: Hardware IWDG selected
+ * @param OB_STOP: Reset event when entering STOP mode.
+ * This parameter can be one of the following values:
+ * @arg OB_STOP_NoRST: No reset generated when entering in STOP
+ * @arg OB_STOP_RST: Reset generated when entering in STOP
+ * @param OB_STDBY: Reset event when entering Standby mode.
+ * This parameter can be one of the following values:
+ * @arg OB_STDBY_NoRST: No reset generated when entering in STANDBY
+ * @arg OB_STDBY_RST: Reset generated when entering in STANDBY
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_OB_UserConfig(uint8_t OB_IWDG, uint8_t OB_STOP, uint8_t OB_STDBY)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+
+ /* Check the parameters */
+ assert_param(IS_OB_IWDG_SOURCE(OB_IWDG));
+ assert_param(IS_OB_STOP_SOURCE(OB_STOP));
+ assert_param(IS_OB_STDBY_SOURCE(OB_STDBY));
+
+ /* Authorize the small information block programming */
+ FLASH->OPTKEYR = FLASH_KEY1;
+ FLASH->OPTKEYR = FLASH_KEY2;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* Enable the Option Bytes Programming operation */
+ FLASH->CR |= FLASH_CR_OPTPG;
+
+ OB->USER = (uint8_t)((uint8_t)(OB_IWDG | OB_STOP) | (uint8_t)(OB_STDBY |0xF8));
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status != FLASH_TIMEOUT)
+ {
+ /* if the program operation is completed, disable the OPTPG Bit */
+ FLASH->CR &= ~FLASH_CR_OPTPG;
+ }
+ }
+ /* Return the Option Byte program Status */
+ return status;
+}
+
+/**
+ * @brief Sets or resets the BOOT1.
+ * @param OB_BOOT1: Set or Reset the BOOT1.
+ * This parameter can be one of the following values:
+ * @arg OB_BOOT1_RESET: BOOT1 Reset
+ * @arg OB_BOOT1_SET: BOOT1 Set
+ * @retval None
+ */
+FLASH_Status FLASH_OB_BOOTConfig(uint8_t OB_BOOT1)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+
+ /* Check the parameters */
+ assert_param(IS_OB_BOOT1(OB_BOOT1));
+
+ /* Authorize the small information block programming */
+ FLASH->OPTKEYR = FLASH_KEY1;
+ FLASH->OPTKEYR = FLASH_KEY2;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* Enable the Option Bytes Programming operation */
+ FLASH->CR |= FLASH_CR_OPTPG;
+
+ OB->USER = OB_BOOT1|0xEF;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status != FLASH_TIMEOUT)
+ {
+ /* if the program operation is completed, disable the OPTPG Bit */
+ FLASH->CR &= ~FLASH_CR_OPTPG;
+ }
+ }
+ /* Return the Option Byte program Status */
+ return status;
+}
+
+/**
+ * @brief Sets or resets the analogue monitoring on VDDA Power source.
+ * @param OB_VDDA_ANALOG: Selects the analog monitoring on VDDA Power source.
+ * This parameter can be one of the following values:
+ * @arg OB_VDDA_ANALOG_ON: Analog monitoring on VDDA Power source ON
+ * @arg OB_VDDA_ANALOG_OFF: Analog monitoring on VDDA Power source OFF
+ * @retval None
+ */
+FLASH_Status FLASH_OB_VDDAConfig(uint8_t OB_VDDA_ANALOG)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+
+ /* Check the parameters */
+ assert_param(IS_OB_VDDA_ANALOG(OB_VDDA_ANALOG));
+
+ /* Authorize the small information block programming */
+ FLASH->OPTKEYR = FLASH_KEY1;
+ FLASH->OPTKEYR = FLASH_KEY2;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* Enable the Option Bytes Programming operation */
+ FLASH->CR |= FLASH_CR_OPTPG;
+
+ OB->USER = OB_VDDA_ANALOG |0xDF;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status != FLASH_TIMEOUT)
+ {
+ /* if the program operation is completed, disable the OPTPG Bit */
+ FLASH->CR &= ~FLASH_CR_OPTPG;
+ }
+ }
+ /* Return the Option Byte program Status */
+ return status;
+}
+
+/**
+ * @brief Sets or resets the SRAM partiy.
+ * @param OB_SRAM_Parity: Set or Reset the SRAM partiy enable bit.
+ * This parameter can be one of the following values:
+ * @arg OB_SRAM_PARITY_SET: Set SRAM partiy.
+ * @arg OB_SRAM_PARITY_RESET: Reset SRAM partiy.
+ * @retval None
+ */
+FLASH_Status FLASH_OB_SRAMParityConfig(uint8_t OB_SRAM_Parity)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+
+ /* Check the parameters */
+ assert_param(IS_OB_SRAM_PARITY(OB_SRAM_Parity));
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* Enable the Option Bytes Programming operation */
+ FLASH->CR |= FLASH_CR_OPTPG;
+
+ OB->USER = OB_SRAM_Parity | 0xBF;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status != FLASH_TIMEOUT)
+ {
+ /* if the program operation is completed, disable the OPTPG Bit */
+ FLASH->CR &= ~FLASH_CR_OPTPG;
+ }
+ }
+ /* Return the Option Byte program Status */
+ return status;
+}
+
+/**
+ * @brief Programs the FLASH User Option Byte: IWDG_SW / RST_STOP / RST_STDBY/ BOOT1 and OB_VDDA_ANALOG.
+ * @note To correctly run this function, the FLASH_OB_Unlock() function
+ * must be called before.
+ * @note Call the FLASH_OB_Lock() to disable the flash control register access and the option bytes
+ * (recommended to protect the FLASH memory against possible unwanted operation)
+ * @param OB_USER: Selects all user option bytes
+ * This parameter is a combination of the following values:
+ * @arg OB_IWDG_SW / OB_IWDG_HW: Software / Hardware WDG selected
+ * @arg OB_STOP_NoRST / OB_STOP_RST: No reset / Reset generated when entering in STOP
+ * @arg OB_STDBY_NoRST / OB_STDBY_RST: No reset / Reset generated when entering in STANDBY
+ * @arg OB_BOOT1_RESET / OB_BOOT1_SET: BOOT1 Reset / Set
+ * @arg OB_VDDA_ANALOG_ON / OB_VDDA_ANALOG_OFF: Analog monitoring on VDDA Power source ON / OFF
+ * @retval FLASH Status: The returned value can be:
+ * FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_OB_WriteUser(uint8_t OB_USER)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+
+ /* Authorize the small information block programming */
+ FLASH->OPTKEYR = FLASH_KEY1;
+ FLASH->OPTKEYR = FLASH_KEY2;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* Enable the Option Bytes Programming operation */
+ FLASH->CR |= FLASH_CR_OPTPG;
+
+ OB->USER = OB_USER | 0x88;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status != FLASH_TIMEOUT)
+ {
+ /* if the program operation is completed, disable the OPTPG Bit */
+ FLASH->CR &= ~FLASH_CR_OPTPG;
+ }
+ }
+ /* Return the Option Byte program Status */
+ return status;
+
+}
+
+/**
+ * @brief Programs a half word at a specified Option Byte Data address.
+ * @note To correctly run this function, the FLASH_OB_Unlock() function
+ * must be called before.
+ * Call the FLASH_OB_Lock() to disable the flash control register access and the option bytes
+ * (recommended to protect the FLASH memory against possible unwanted operation)
+ * @param Address: specifies the address to be programmed.
+ * This parameter can be 0x1FFFF804 or 0x1FFFF806.
+ * @param Data: specifies the data to be programmed.
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_ProgramOptionByteData(uint32_t Address, uint8_t Data)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+ /* Check the parameters */
+ assert_param(IS_OB_DATA_ADDRESS(Address));
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* Enables the Option Bytes Programming operation */
+ FLASH->CR |= FLASH_CR_OPTPG;
+ *(__IO uint16_t*)Address = Data;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
+
+ if(status != FLASH_TIMEOUT)
+ {
+ /* If the program operation is completed, disable the OPTPG Bit */
+ FLASH->CR &= ~FLASH_CR_OPTPG;
+ }
+ }
+ /* Return the Option Byte Data Program Status */
+ return status;
+}
+
+/**
+ * @brief Returns the FLASH User Option Bytes values.
+ * @param None
+ * @retval The FLASH User Option Bytes .
+ */
+uint8_t FLASH_OB_GetUser(void)
+{
+ /* Return the User Option Byte */
+ return (uint8_t)(FLASH->OBR >> 8);
+}
+
+/**
+ * @brief Returns the FLASH Write Protection Option Bytes value.
+ * @param None
+ * @retval The FLASH Write Protection Option Bytes value
+ */
+uint32_t FLASH_OB_GetWRP(void)
+{
+ /* Return the FLASH write protection Register value */
+ return (uint32_t)(FLASH->WRPR);
+}
+
+/**
+ * @brief Checks whether the FLASH Read out Protection Status is set or not.
+ * @param None
+ * @retval FLASH ReadOut Protection Status(SET or RESET)
+ */
+FlagStatus FLASH_OB_GetRDP(void)
+{
+ FlagStatus readstatus = RESET;
+
+ if ((uint8_t)(FLASH->OBR & (FLASH_OBR_RDPRT1 | FLASH_OBR_RDPRT2)) != RESET)
+ {
+ readstatus = SET;
+ }
+ else
+ {
+ readstatus = RESET;
+ }
+ return readstatus;
+}
+
+/**
+ * @}
+ */
+
+/** @defgroup FLASH_Group4 Interrupts and flags management functions
+ * @brief Interrupts and flags management functions
+ *
+@verbatim
+ ===============================================================================
+ ##### Interrupts and flags management functions #####
+ ===============================================================================
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Enables or disables the specified FLASH interrupts.
+ * @param FLASH_IT: specifies the FLASH interrupt sources to be enabled or
+ * disabled.
+ * This parameter can be any combination of the following values:
+ * @arg FLASH_IT_EOP: FLASH end of programming Interrupt
+ * @arg FLASH_IT_ERR: FLASH Error Interrupt
+ * @retval None
+ */
+void FLASH_ITConfig(uint32_t FLASH_IT, FunctionalState NewState)
+{
+ /* Check the parameters */
+ assert_param(IS_FLASH_IT(FLASH_IT));
+ assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+ if(NewState != DISABLE)
+ {
+ /* Enable the interrupt sources */
+ FLASH->CR |= FLASH_IT;
+ }
+ else
+ {
+ /* Disable the interrupt sources */
+ FLASH->CR &= ~(uint32_t)FLASH_IT;
+ }
+}
+
+/**
+ * @brief Checks whether the specified FLASH flag is set or not.
+ * @param FLASH_FLAG: specifies the FLASH flag to check.
+ * This parameter can be one of the following values:
+ * @arg FLASH_FLAG_BSY: FLASH write/erase operations in progress flag
+ * @arg FLASH_FLAG_PGERR: FLASH Programming error flag flag
+ * @arg FLASH_FLAG_WRPERR: FLASH Write protected error flag
+ * @arg FLASH_FLAG_EOP: FLASH End of Programming flag
+ * @retval The new state of FLASH_FLAG (SET or RESET).
+ */
+FlagStatus FLASH_GetFlagStatus(uint32_t FLASH_FLAG)
+{
+ FlagStatus bitstatus = RESET;
+
+ /* Check the parameters */
+ assert_param(IS_FLASH_GET_FLAG(FLASH_FLAG));
+
+ if((FLASH->SR & FLASH_FLAG) != (uint32_t)RESET)
+ {
+ bitstatus = SET;
+ }
+ else
+ {
+ bitstatus = RESET;
+ }
+ /* Return the new state of FLASH_FLAG (SET or RESET) */
+ return bitstatus;
+}
+
+/**
+ * @brief Clears the FLASH's pending flags.
+ * @param FLASH_FLAG: specifies the FLASH flags to clear.
+ * This parameter can be any combination of the following values:
+ * @arg FLASH_FLAG_PGERR: FLASH Programming error flag flag
+ * @arg FLASH_FLAG_WRPERR: FLASH Write protected error flag
+ * @arg FLASH_FLAG_EOP: FLASH End of Programming flag
+ * @retval None
+ */
+void FLASH_ClearFlag(uint32_t FLASH_FLAG)
+{
+ /* Check the parameters */
+ assert_param(IS_FLASH_CLEAR_FLAG(FLASH_FLAG));
+
+ /* Clear the flags */
+ FLASH->SR = FLASH_FLAG;
+}
+
+/**
+ * @brief Returns the FLASH Status.
+ * @param None
+ * @retval FLASH Status: The returned value can be:
+ * FLASH_BUSY, FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP or FLASH_COMPLETE.
+ */
+FLASH_Status FLASH_GetStatus(void)
+{
+ FLASH_Status FLASHstatus = FLASH_COMPLETE;
+
+ if((FLASH->SR & FLASH_FLAG_BSY) == FLASH_FLAG_BSY)
+ {
+ FLASHstatus = FLASH_BUSY;
+ }
+ else
+ {
+ if((FLASH->SR & (uint32_t)FLASH_FLAG_WRPERR)!= (uint32_t)0x00)
+ {
+ FLASHstatus = FLASH_ERROR_WRP;
+ }
+ else
+ {
+ if((FLASH->SR & (uint32_t)(FLASH_SR_PGERR)) != (uint32_t)0x00)
+ {
+ FLASHstatus = FLASH_ERROR_PROGRAM;
+ }
+ else
+ {
+ FLASHstatus = FLASH_COMPLETE;
+ }
+ }
+ }
+ /* Return the FLASH Status */
+ return FLASHstatus;
+}
+
+/**
+ * @brief Waits for a FLASH operation to complete or a TIMEOUT to occur.
+ * @param Timeout: FLASH programming Timeout
+ * @retval FLASH Status: The returned value can be: FLASH_BUSY,
+ * FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_WaitForLastOperation(uint32_t Timeout)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+
+ /* Check for the FLASH Status */
+ status = FLASH_GetStatus();
+
+ /* Wait for a FLASH operation to complete or a TIMEOUT to occur */
+ while((status == FLASH_BUSY) && (Timeout != 0x00))
+ {
+ status = FLASH_GetStatus();
+ Timeout--;
+ }
+
+ if(Timeout == 0x00 )
+ {
+ status = FLASH_TIMEOUT;
+ }
+ /* Return the operation status */
+ return status;
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/