/********************************************************************************* @file stm32f10x_flash.c* @author MCD Application Team* @version V3.1.0* @date 06/19/2009* @brief This file provides all the FLASH firmware functions.******************************************************************************* @copy** THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.** <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2>*//* Includes ------------------------------------------------------------------*/#include "stm32f10x_flash.h"/** @addtogroup STM32F10x_StdPeriph_Driver* @{*//** @defgroup FLASH* @brief FLASH driver modules* @{*//** @defgroup FLASH_Private_TypesDefinitions* @{*//*** @}*//** @defgroup FLASH_Private_Defines* @{*//* Flash Access Control Register bits */#define ACR_LATENCY_Mask ((uint32_t)0x00000038)#define ACR_HLFCYA_Mask ((uint32_t)0xFFFFFFF7)#define ACR_PRFTBE_Mask ((uint32_t)0xFFFFFFEF)/* Flash Access Control Register bits */#define ACR_PRFTBS_Mask ((uint32_t)0x00000020)/* Flash Control Register bits */#define CR_PG_Set ((uint32_t)0x00000001)#define CR_PG_Reset ((uint32_t)0x00001FFE)#define CR_PER_Set ((uint32_t)0x00000002)#define CR_PER_Reset ((uint32_t)0x00001FFD)#define CR_MER_Set ((uint32_t)0x00000004)#define CR_MER_Reset ((uint32_t)0x00001FFB)#define CR_OPTPG_Set ((uint32_t)0x00000010)#define CR_OPTPG_Reset ((uint32_t)0x00001FEF)#define CR_OPTER_Set ((uint32_t)0x00000020)#define CR_OPTER_Reset ((uint32_t)0x00001FDF)#define CR_STRT_Set ((uint32_t)0x00000040)#define CR_LOCK_Set ((uint32_t)0x00000080)/* FLASH Mask */#define RDPRT_Mask ((uint32_t)0x00000002)#define WRP0_Mask ((uint32_t)0x000000FF)#define WRP1_Mask ((uint32_t)0x0000FF00)#define WRP2_Mask ((uint32_t)0x00FF0000)#define WRP3_Mask ((uint32_t)0xFF000000)/* FLASH Keys */#define RDP_Key ((uint16_t)0x00A5)#define FLASH_KEY1 ((uint32_t)0x45670123)#define FLASH_KEY2 ((uint32_t)0xCDEF89AB)/* Delay definition */#define EraseTimeout ((uint32_t)0x00000FFF)#define ProgramTimeout ((uint32_t)0x0000000F)/*** @}*//** @defgroup FLASH_Private_Macros* @{*//*** @}*//** @defgroup FLASH_Private_Variables* @{*//*** @}*//** @defgroup FLASH_Private_FunctionPrototypes* @{*/static void delay(void);/*** @}*//** @defgroup FLASH_Private_Functions* @{*//*** @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 &= ACR_LATENCY_Mask;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(uint32_t FLASH_HalfCycleAccess){/* Check the parameters */assert_param(IS_FLASH_HALFCYCLEACCESS_STATE(FLASH_HalfCycleAccess));/* Enable or disable the Half cycle access */FLASH->ACR &= ACR_HLFCYA_Mask;FLASH->ACR |= FLASH_HalfCycleAccess;}/*** @brief Enables or disables the Prefetch Buffer.* @param FLASH_PrefetchBuffer: specifies the Prefetch buffer status.* This parameter can be one of the following values:* @arg FLASH_PrefetchBuffer_Enable: FLASH Prefetch Buffer Enable* @arg FLASH_PrefetchBuffer_Disable: FLASH Prefetch Buffer Disable* @retval None*/void FLASH_PrefetchBufferCmd(uint32_t FLASH_PrefetchBuffer){/* Check the parameters */assert_param(IS_FLASH_PREFETCHBUFFER_STATE(FLASH_PrefetchBuffer));/* Enable or disable the Prefetch Buffer */FLASH->ACR &= ACR_PRFTBE_Mask;FLASH->ACR |= FLASH_PrefetchBuffer;}/*** @brief Unlocks the FLASH Program Erase Controller.* @param None* @retval None*/void FLASH_Unlock(void){/* Authorize the FPEC Access */FLASH->KEYR = FLASH_KEY1;FLASH->KEYR = FLASH_KEY2;}/*** @brief Locks the FLASH Program Erase Controller.* @param None* @retval None*/void FLASH_Lock(void){/* Set the Lock Bit to lock the FPEC and the FCR */FLASH->CR |= CR_LOCK_Set;}/*** @brief Erases a specified FLASH page.* @param Page_Address: The page address to be erased.* @retval FLASH Status: The returned value can be: FLASH_BUSY, FLASH_ERROR_PG,* 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_ADDRESS(Page_Address));/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(EraseTimeout);if(status == FLASH_COMPLETE){/* if the previous operation is completed, proceed to erase the page */FLASH->CR|= CR_PER_Set;FLASH->AR = Page_Address;FLASH->CR|= CR_STRT_Set;/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(EraseTimeout);if(status != FLASH_TIMEOUT){/* if the erase operation is completed, disable the PER Bit */FLASH->CR &= CR_PER_Reset;}}/* Return the Erase Status */return status;}/*** @brief Erases all FLASH pages.* @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(EraseTimeout);if(status == FLASH_COMPLETE){/* if the previous operation is completed, proceed to erase all pages */FLASH->CR |= CR_MER_Set;FLASH->CR |= CR_STRT_Set;/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(EraseTimeout);if(status != FLASH_TIMEOUT){/* if the erase operation is completed, disable the MER Bit */FLASH->CR &= CR_MER_Reset;}}/* Return the Erase Status */return status;}/*** @brief Erases the FLASH option bytes.* @param None* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.*/FLASH_Status FLASH_EraseOptionBytes(void){FLASH_Status status = FLASH_COMPLETE;/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(EraseTimeout);if(status == FLASH_COMPLETE){/* Authorize the small information block programming */FLASH->OPTKEYR = FLASH_KEY1;FLASH->OPTKEYR = FLASH_KEY2;/* if the previous operation is completed, proceed to erase the option bytes */FLASH->CR |= CR_OPTER_Set;FLASH->CR |= CR_STRT_Set;/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(EraseTimeout);if(status == FLASH_COMPLETE){/* if the erase operation is completed, disable the OPTER Bit */FLASH->CR &= CR_OPTER_Reset;/* Enable the Option Bytes Programming operation */FLASH->CR |= CR_OPTPG_Set;/* Enable the readout access */OB->RDP= RDP_Key;/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(ProgramTimeout);if(status != FLASH_TIMEOUT){/* if the program operation is completed, disable the OPTPG Bit */FLASH->CR &= CR_OPTPG_Reset;}}else{if (status != FLASH_TIMEOUT){/* Disable the OPTPG Bit */FLASH->CR &= CR_OPTPG_Reset;}}}/* Return the erase status */return status;}/*** @brief Programs a word at a specified address.* @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_ADDRESS(Address));/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(ProgramTimeout);if(status == FLASH_COMPLETE){/* if the previous operation is completed, proceed to program the new firsthalf word */FLASH->CR |= CR_PG_Set;*(__IO uint16_t*)Address = (uint16_t)Data;/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(ProgramTimeout);if(status == FLASH_COMPLETE){/* if the previous operation is completed, proceed to program the new secondhalf word */tmp = Address + 2;*(__IO uint16_t*) tmp = Data >> 16;/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(ProgramTimeout);if(status != FLASH_TIMEOUT){/* Disable the PG Bit */FLASH->CR &= CR_PG_Reset;}}else{if (status != FLASH_TIMEOUT){/* Disable the PG Bit */FLASH->CR &= CR_PG_Reset;}}}/* Return the Program Status */return status;}/*** @brief Programs a half word at a specified address.* @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_ADDRESS(Address));/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(ProgramTimeout);if(status == FLASH_COMPLETE){/* if the previous operation is completed, proceed to program the new data */FLASH->CR |= CR_PG_Set;*(__IO uint16_t*)Address = Data;/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(ProgramTimeout);if(status != FLASH_TIMEOUT){/* if the program operation is completed, disable the PG Bit */FLASH->CR &= CR_PG_Reset;}}/* Return the Program Status */return status;}/*** @brief Programs a half word at a specified Option Byte Data address.* @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(ProgramTimeout);if(status == FLASH_COMPLETE){/* Authorize the small information block programming */FLASH->OPTKEYR = FLASH_KEY1;FLASH->OPTKEYR = FLASH_KEY2;/* Enables the Option Bytes Programming operation */FLASH->CR |= CR_OPTPG_Set;*(__IO uint16_t*)Address = Data;/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(ProgramTimeout);if(status != FLASH_TIMEOUT){/* if the program operation is completed, disable the OPTPG Bit */FLASH->CR &= CR_OPTPG_Reset;}}/* Return the Option Byte Data Program Status */return status;}/*** @brief Write protects the desired pages* @param FLASH_Pages: specifies the address of the pages to be write protected.* This parameter can be:* @arg For @b STM32_Low-density_devices: value between FLASH_WRProt_Pages0to3 and FLASH_WRProt_Pages28to31* @arg For @b STM32_Medium-density_devices: value between FLASH_WRProt_Pages0to3* and FLASH_WRProt_Pages124to127* @arg For @b STM32_High-density_devices: value between FLASH_WRProt_Pages0to1 and* FLASH_WRProt_Pages60to61 or FLASH_WRProt_Pages62to255* @arg For @b STM32_Connectivity_line_devices: value between FLASH_WRProt_Pages0to1 and* FLASH_WRProt_Pages60to61 or FLASH_WRProt_Pages62to127* @arg FLASH_WRProt_AllPages* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.*/FLASH_Status FLASH_EnableWriteProtection(uint32_t FLASH_Pages){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_FLASH_WRPROT_PAGE(FLASH_Pages));FLASH_Pages = (uint32_t)(~FLASH_Pages);WRP0_Data = (uint16_t)(FLASH_Pages & WRP0_Mask);WRP1_Data = (uint16_t)((FLASH_Pages & WRP1_Mask) >> 8);WRP2_Data = (uint16_t)((FLASH_Pages & WRP2_Mask) >> 16);WRP3_Data = (uint16_t)((FLASH_Pages & WRP3_Mask) >> 24);/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(ProgramTimeout);if(status == FLASH_COMPLETE){/* Authorizes the small information block programming */FLASH->OPTKEYR = FLASH_KEY1;FLASH->OPTKEYR = FLASH_KEY2;FLASH->CR |= CR_OPTPG_Set;if(WRP0_Data != 0xFF){OB->WRP0 = WRP0_Data;/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(ProgramTimeout);}if((status == FLASH_COMPLETE) && (WRP1_Data != 0xFF)){OB->WRP1 = WRP1_Data;/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(ProgramTimeout);}if((status == FLASH_COMPLETE) && (WRP2_Data != 0xFF)){OB->WRP2 = WRP2_Data;/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(ProgramTimeout);}if((status == FLASH_COMPLETE)&& (WRP3_Data != 0xFF)){OB->WRP3 = WRP3_Data;/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(ProgramTimeout);}if(status != FLASH_TIMEOUT){/* if the program operation is completed, disable the OPTPG Bit */FLASH->CR &= CR_OPTPG_Reset;}}/* Return the write protection operation Status */return status;}/*** @brief Enables or disables the read out protection.* @note If the user has already programmed the other option bytes before calling* this function, he must re-program them since this function erases all option bytes.* @param Newstate: new state of the ReadOut Protection.* This parameter can be: ENABLE or DISABLE.* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.*/FLASH_Status FLASH_ReadOutProtection(FunctionalState NewState){FLASH_Status status = FLASH_COMPLETE;/* Check the parameters */assert_param(IS_FUNCTIONAL_STATE(NewState));status = FLASH_WaitForLastOperation(EraseTimeout);if(status == FLASH_COMPLETE){/* Authorizes the small information block programming */FLASH->OPTKEYR = FLASH_KEY1;FLASH->OPTKEYR = FLASH_KEY2;FLASH->CR |= CR_OPTER_Set;FLASH->CR |= CR_STRT_Set;/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(EraseTimeout);if(status == FLASH_COMPLETE){/* if the erase operation is completed, disable the OPTER Bit */FLASH->CR &= CR_OPTER_Reset;/* Enable the Option Bytes Programming operation */FLASH->CR |= CR_OPTPG_Set;if(NewState != DISABLE){OB->RDP = 0x00;}else{OB->RDP = RDP_Key;}/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(EraseTimeout);if(status != FLASH_TIMEOUT){/* if the program operation is completed, disable the OPTPG Bit */FLASH->CR &= CR_OPTPG_Reset;}}else{if(status != FLASH_TIMEOUT){/* Disable the OPTER Bit */FLASH->CR &= CR_OPTER_Reset;}}}/* 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_UserOptionByteConfig(uint16_t OB_IWDG, uint16_t OB_STOP, uint16_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(ProgramTimeout);if(status == FLASH_COMPLETE){/* Enable the Option Bytes Programming operation */FLASH->CR |= CR_OPTPG_Set;OB->USER = OB_IWDG | (uint16_t)(OB_STOP | (uint16_t)(OB_STDBY | ((uint16_t)0xF8)));/* Wait for last operation to be completed */status = FLASH_WaitForLastOperation(ProgramTimeout);if(status != FLASH_TIMEOUT){/* if the program operation is completed, disable the OPTPG Bit */FLASH->CR &= CR_OPTPG_Reset;}}/* Return the Option Byte program Status */return status;}/*** @brief Returns the FLASH User Option Bytes values.* @param None* @retval The FLASH User Option Bytes values:IWDG_SW(Bit0), RST_STOP(Bit1)* and RST_STDBY(Bit2).*/uint32_t FLASH_GetUserOptionByte(void){/* Return the User Option Byte */return (uint32_t)(FLASH->OBR >> 2);}/*** @brief Returns the FLASH Write Protection Option Bytes Register value.* @param None* @retval The FLASH Write Protection Option Bytes Register value*/uint32_t FLASH_GetWriteProtectionOptionByte(void){/* Return the Falsh 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_GetReadOutProtectionStatus(void){FlagStatus readoutstatus = RESET;if ((FLASH->OBR & RDPRT_Mask) != (uint32_t)RESET){readoutstatus = SET;}else{readoutstatus = RESET;}return readoutstatus;}/*** @brief Checks whether the FLASH Prefetch Buffer status is set or not.* @param None* @retval FLASH Prefetch Buffer Status (SET or RESET).*/FlagStatus FLASH_GetPrefetchBufferStatus(void){FlagStatus bitstatus = RESET;if ((FLASH->ACR & ACR_PRFTBS_Mask) != (uint32_t)RESET){bitstatus = SET;}else{bitstatus = RESET;}/* Return the new state of FLASH Prefetch Buffer Status (SET or RESET) */return bitstatus;}/*** @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_ERROR: FLASH Error Interrupt* @arg FLASH_IT_EOP: FLASH end of operation Interrupt* @param NewState: new state of the specified Flash interrupts.* This parameter can be: ENABLE or DISABLE.* @retval None*/void FLASH_ITConfig(uint16_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 Busy flag* @arg FLASH_FLAG_PGERR: FLASH Program error flag* @arg FLASH_FLAG_WRPRTERR: FLASH Write protected error flag* @arg FLASH_FLAG_EOP: FLASH End of Operation flag* @arg FLASH_FLAG_OPTERR: FLASH Option Byte error flag* @retval The new state of FLASH_FLAG (SET or RESET).*/FlagStatus FLASH_GetFlagStatus(uint16_t FLASH_FLAG){FlagStatus bitstatus = RESET;/* Check the parameters */assert_param(IS_FLASH_GET_FLAG(FLASH_FLAG)) ;if(FLASH_FLAG == FLASH_FLAG_OPTERR){if((FLASH->OBR & FLASH_FLAG_OPTERR) != (uint32_t)RESET){bitstatus = SET;}else{bitstatus = RESET;}}else{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 FLASHs 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 Program error flag* @arg FLASH_FLAG_WRPRTERR: FLASH Write protected error flag* @arg FLASH_FLAG_EOP: FLASH End of Operation flag* @retval None*/void FLASH_ClearFlag(uint16_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_PG,* 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 & FLASH_FLAG_PGERR) != 0){flashstatus = FLASH_ERROR_PG;}else{if((FLASH->SR & FLASH_FLAG_WRPRTERR) != 0 ){flashstatus = FLASH_ERROR_WRP;}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 progamming Timeout* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,* 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)){delay();status = FLASH_GetStatus();Timeout--;}if(Timeout == 0x00 ){status = FLASH_TIMEOUT;}/* Return the operation status */return status;}/*** @brief Inserts a time delay.* @param None* @retval None*/static void delay(void){__IO uint32_t i = 0;for(i = 0xFF; i != 0; i--){}}/*** @}*//*** @}*//*** @}*//******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/