/** ****************************************************************************** * @file stm32f30x_flash.c * @author MCD Application Team * @version V1.2.3 * @date 10-July-2015 * @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 * *

© COPYRIGHT 2015 STMicroelectronics

* * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); * You may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.st.com/software_license_agreement_liberty_v2 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ****************************************************************************** */ /* 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 monitoring. (++) 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, WRP2_Data = 0xFFFF, WRP3_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 >> 8) & OB_WRP0_WRP0); WRP2_Data = (uint16_t)((OB_WRP >> 16) & OB_WRP0_WRP0) ; WRP3_Data = (uint16_t)((OB_WRP >> 24) & OB_WRP0_WRP0) ; /* 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_COMPLETE) && (WRP2_Data != 0xFF)) { OB->WRP2 = WRP2_Data; /* Wait for last operation to be completed */ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); } if((status == FLASH_COMPLETE) && (WRP3_Data != 0xFF)) { OB->WRP3 = WRP3_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 parity. * @param OB_SRAM_Parity: Set or Reset the SRAM parity enable bit. * This parameter can be one of the following values: * @arg OB_SRAM_PARITY_SET: Set SRAM parity. * @arg OB_SRAM_PARITY_RESET: Reset SRAM parity. * @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 * @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 * @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****/