stm32_flash_eeprom_断电保护_数值存储程序

1、/*eeprom.h*/* * * file EEPROM_Emulation/inc/eeprom.h * author MCD Application Team * version V3.1.0 * date 07/27/2009 * brief This file contains all the functions prototypes for the EEPROM * emulation firmware library. * * copy * * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CU

2、STOMERS * 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 CUST

3、OMERS OF THE * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. * * <h2><center>&copy; COPYRIGHT 2009 STMicroelectronics</center></h2> */* Define to prevent recursive inclusion -*/#ifndef _EEPROM_H#define _EEPROM_H/* Includes -*/#include "stm32f

4、10x.h"/* Exported constants -*/* Define the STM32F10Xxx Flash page size depending on the used STM32 device */#if defined (STM32F10X_LD) | defined (STM32F10X_MD) #define PAGE_SIZE (uint16_t)0x400 /* Page size = 1KByte */#elif defined (STM32F10X_HD) | defined (STM32F10X_CL) #define PAGE_SIZE (uin

5、t16_t)0x800 /* Page size = 2KByte */#endif/* EEPROM start address in Flash */#define EEPROM_START_ADDRESS (uint32_t)0x08010000) /* EEPROM emulation start address: after 64KByte of used Flash memory */* Pages 0 and 1 base and end addresses */#define PAGE0_BASE_ADDRESS (uint32_t)(EEPROM_START_ADDRESS

6、+ 0x000)#define PAGE0_END_ADDRESS (uint32_t)(EEPROM_START_ADDRESS + (PAGE_SIZE - 1)#define PAGE1_BASE_ADDRESS (uint32_t)(EEPROM_START_ADDRESS + PAGE_SIZE)#define PAGE1_END_ADDRESS (uint32_t)(EEPROM_START_ADDRESS + (2 * PAGE_SIZE - 1)/* Used Flash pages for EEPROM emulation */#define PAGE0 (uint16_t)

7、0x0000)#define PAGE1 (uint16_t)0x0001)/* No valid page define */#define NO_VALID_PAGE (uint16_t)0x00AB)/* Page status definitions */#define ERASED (uint16_t)0xFFFF) /* PAGE is empty */#define RECEIVE_DATA (uint16_t)0xEEEE) /* PAGE is marked to receive data */#define VALID_PAGE (uint16_t)0x0000) /* P

8、AGE containing valid data */* Valid pages in read and write defines */#define READ_FROM_VALID_PAGE (uint8_t)0x00)#define WRITE_IN_VALID_PAGE (uint8_t)0x01)/* Page full define */#define PAGE_FULL (uint8_t)0x80)/* Variables' number */#define NumbOfVar (uint8_t)0x03)/* Exported types -*/* Exported

9、macro -*/* Exported functions - */uint16_t EE_Init(void);uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t* Data);uint16_t EE_WriteVariable(uint16_t VirtAddress, uint16_t Data);#endif /* _EEPROM_H */* (C) COPYRIGHT 2009 STMicroelectronics *END OF FILE*/*eeprom.h*/*eeprom.c*/* * * file EEPROM_E

10、mulation/src/eeprom.c * author MCD Application Team * version V3.1.0 * date 07/27/2009 * brief This file provides all the EEPROM emulation firmware functions. * * copy * * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS * WITH CODING INFORMATION REGARDING THEIR PRODUCTS I

11、N 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 CONNEC

12、TION WITH THEIR PRODUCTS. * * <h2><center>&copy; COPYRIGHT 2009 STMicroelectronics</center></h2> */ /* addtogroup EEPROM_Emulation * */ /* Includes -*/#include "eeprom.h"/* Private typedef -*/* Private define -*/* Private macro -*/* Private variables -*/* Global

13、 variable used to store variable value in read sequence */uint16_t DataVar = 0;uint32_t CurWrAddress;/* Virtual address defined by the user: 0xFFFF value is prohibited */uint16_t VirtAddVarTabNumbOfVar;/* Private function prototypes -*/* Private functions -*/static FLASH_Status EE_Format(void);stati

14、c uint16_t EE_FindValidPage(uint8_t Operation);static uint16_t EE_VerifyPageFullWriteVariable(uint16_t VirtAddress, uint16_t Data);static uint16_t EE_PageTransfer(uint16_t VirtAddress, uint16_t Data);/初始化写地址，减少每次读写时查询时间uint16_t InitCurrWrAddress(void) FLASH_Status FlashStatus = FLASH_COMPLETE; uint1

15、6_t ValidPage = PAGE0; /uint32_t Address; uint32_t PageEndAddress; /* Get valid Page for write operation */ ValidPage = EE_FindValidPage(WRITE_IN_VALID_PAGE); /* Check if there is no valid page */ if (ValidPage = NO_VALID_PAGE) CurWrAddress = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage *

16、PAGE_SIZE); return NO_VALID_PAGE; /* Get the valid Page start Address */ /Address = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE); CurWrAddress = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE); /* Get the valid Page end Address */ PageEndAddress = (uint32_t

17、)(EEPROM_START_ADDRESS - 2) + (uint32_t)(1 + ValidPage) * PAGE_SIZE); /* Check each active page address starting from begining */ while (CurWrAddress < PageEndAddress) /* Verify if Address and Address+2 contents are 0xFFFFFFFF */ if (*(_IO uint32_t*)CurWrAddress) = 0xFFFFFFFF) /* Set variable vir

18、tual address */ FlashStatus = FLASH_COMPLETE; /* Return program operation status */ return FlashStatus; else /* Next address location */ CurWrAddress = CurWrAddress + 4; /* Return PAGE_FULL in case the valid page is full */ return PAGE_FULL;/* * brief Restore the pages to a known good state in case

19、of page's status * corruption after a power loss. * param None. * retval - Flash error code: on write Flash error * - FLASH_COMPLETE: on success */uint16_t _EE_Init(void) uint16_t PageStatus0 = 6, PageStatus1 = 6; uint16_t VarIdx = 0; uint16_t EepromStatus = 0, ReadStatus = 0; int16_t x = -1; ui

20、nt16_t FlashStatus; /* Get Page0 status */ PageStatus0 = (*(_IO uint16_t*)PAGE0_BASE_ADDRESS); /* Get Page1 status */ PageStatus1 = (*(_IO uint16_t*)PAGE1_BASE_ADDRESS); /* Check for invalid header states and repair if necessary */ switch (PageStatus0) case ERASED: if (PageStatus1 = VALID_PAGE) /* P

21、age0 erased, Page1 valid */ /* Erase Page0 */ FlashStatus = FLASH_ErasePage(PAGE0_BASE_ADDRESS); /* If erase operation was failed, a Flash error code is returned */ if (FlashStatus != FLASH_COMPLETE) return FlashStatus; else if (PageStatus1 = RECEIVE_DATA) /* Page0 erased, Page1 receive */ /* Erase

22、Page0 */ FlashStatus = FLASH_ErasePage(PAGE0_BASE_ADDRESS); /* If erase operation was failed, a Flash error code is returned */ if (FlashStatus != FLASH_COMPLETE) return FlashStatus; /* Mark Page1 as valid */ FlashStatus = FLASH_ProgramHalfWord(PAGE1_BASE_ADDRESS, VALID_PAGE); /* If program operatio

23、n was failed, a Flash error code is returned */ if (FlashStatus != FLASH_COMPLETE) return FlashStatus; else /* First EEPROM access (Page0&1 are erased) or invalid state -> format EEPROM */ /* Erase both Page0 and Page1 and set Page0 as valid page */ FlashStatus = EE_Format(); /* If erase/prog

24、ram operation was failed, a Flash error code is returned */ if (FlashStatus != FLASH_COMPLETE) return FlashStatus; break; case RECEIVE_DATA: if (PageStatus1 = VALID_PAGE) /* Page0 receive, Page1 valid */ /* Transfer data from Page1 to Page0 */ for (VarIdx = 0; VarIdx < NumbOfVar; VarIdx+) if ( *(

25、_IO uint16_t*)(PAGE0_BASE_ADDRESS + 6) = VirtAddVarTabVarIdx) x = VarIdx; if (VarIdx != x) /* Read the last variables' updates */ ReadStatus = EE_ReadVariable(VirtAddVarTabVarIdx, &DataVar); /* In case variable corresponding to the virtual address was found */ if (ReadStatus != 0x1) /* Trans

26、fer the variable to the Page0 */ EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddVarTabVarIdx, DataVar); /* If program operation was failed, a Flash error code is returned */ if (EepromStatus != FLASH_COMPLETE) return EepromStatus; /* Mark Page0 as valid */ FlashStatus = FLASH_ProgramHalfWord(P

27、AGE0_BASE_ADDRESS, VALID_PAGE); /* If program operation was failed, a Flash error code is returned */ if (FlashStatus != FLASH_COMPLETE) return FlashStatus; /* Erase Page1 */ FlashStatus = FLASH_ErasePage(PAGE1_BASE_ADDRESS); /* If erase operation was failed, a Flash error code is returned */ if (Fl

28、ashStatus != FLASH_COMPLETE) return FlashStatus; else if (PageStatus1 = ERASED) /* Page0 receive, Page1 erased */ /* Erase Page1 */ FlashStatus = FLASH_ErasePage(PAGE1_BASE_ADDRESS); /* If erase operation was failed, a Flash error code is returned */ if (FlashStatus != FLASH_COMPLETE) return FlashSt

29、atus; /* Mark Page0 as valid */ FlashStatus = FLASH_ProgramHalfWord(PAGE0_BASE_ADDRESS, VALID_PAGE); /* If program operation was failed, a Flash error code is returned */ if (FlashStatus != FLASH_COMPLETE) return FlashStatus; else /* Invalid state -> format eeprom */ /* Erase both Page0 and Page1

30、 and set Page0 as valid page */ FlashStatus = EE_Format(); /* If erase/program operation was failed, a Flash error code is returned */ if (FlashStatus != FLASH_COMPLETE) return FlashStatus; break; case VALID_PAGE: if (PageStatus1 = VALID_PAGE) /* Invalid state -> format eeprom */ /* Erase both Pa

31、ge0 and Page1 and set Page0 as valid page */ FlashStatus = EE_Format(); /* If erase/program operation was failed, a Flash error code is returned */ if (FlashStatus != FLASH_COMPLETE) return FlashStatus; else if (PageStatus1 = ERASED) /* Page0 valid, Page1 erased */ /* Erase Page1 */ FlashStatus = FL

32、ASH_ErasePage(PAGE1_BASE_ADDRESS); /* If erase operation was failed, a Flash error code is returned */ if (FlashStatus != FLASH_COMPLETE) return FlashStatus; else /* Page0 valid, Page1 receive */ /* Transfer data from Page0 to Page1 */ for (VarIdx = 0; VarIdx < NumbOfVar; VarIdx+) if (*(_IO uint1

33、6_t*)(PAGE1_BASE_ADDRESS + 6) = VirtAddVarTabVarIdx) x = VarIdx; if (VarIdx != x) /* Read the last variables' updates */ ReadStatus = EE_ReadVariable(VirtAddVarTabVarIdx, &DataVar); /* In case variable corresponding to the virtual address was found */ if (ReadStatus != 0x1) /* Transfer the v

34、ariable to the Page1 */ EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddVarTabVarIdx, DataVar); /* If program operation was failed, a Flash error code is returned */ if (EepromStatus != FLASH_COMPLETE) return EepromStatus; /* Mark Page1 as valid */ FlashStatus = FLASH_ProgramHalfWord(PAGE1_BASE

35、_ADDRESS, VALID_PAGE); /* If program operation was failed, a Flash error code is returned */ if (FlashStatus != FLASH_COMPLETE) return FlashStatus; /* Erase Page0 */ FlashStatus = FLASH_ErasePage(PAGE0_BASE_ADDRESS); /* If erase operation was failed, a Flash error code is returned */ if (FlashStatus

36、 != FLASH_COMPLETE) return FlashStatus; break; default: /* Any other state -> format eeprom */ /* Erase both Page0 and Page1 and set Page0 as valid page */ FlashStatus = EE_Format(); /* If erase/program operation was failed, a Flash error code is returned */ if (FlashStatus != FLASH_COMPLETE) ret

37、urn FlashStatus; break; return FLASH_COMPLETE;uint16_t EE_Init(void)uint16_t FlashStatus; FlashStatus=_EE_Init(); InitCurrWrAddress(); return(FlashStatus);/* * brief Returns the last stored variable data, if found, which correspond to * the passed virtual address * param VirtAddress: Variable virtua

38、l address * param Data: Global variable contains the read variable value * retval Success or error status: * - 0: if variable was found * - 1: if the variable was not found * - NO_VALID_PAGE: if no valid page was found. */uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t* Data) uint16_t ValidP

39、age = PAGE0; uint16_t AddressValue = 0x5555, ReadStatus = 1; uint32_t Address = 0x08010000, PageStartAddress = 0x08010000; /* Get active Page for read operation */ ValidPage = EE_FindValidPage(READ_FROM_VALID_PAGE); /* Check if there is no valid page */ if (ValidPage = NO_VALID_PAGE) return NO_VALID

40、_PAGE; /* Get the valid Page start Address */ PageStartAddress = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE); /* Get the valid Page end Address */ /Address = (uint32_t)(EEPROM_START_ADDRESS - 2) + (uint32_t)(1 + ValidPage) * PAGE_SIZE); Address=CurWrAddress-2; /* Check each a

41、ctive page address starting from end */ while (Address > (PageStartAddress + 2) /* Get the current location content to be compared with virtual address */ AddressValue = (*(_IO uint16_t*)Address); /* Compare the read address with the virtual address */ if (AddressValue = VirtAddress) /* Get conte

42、nt of Address-2 which is variable value */ *Data = (*(_IO uint16_t*)(Address - 2); /* In case variable value is read, reset ReadStatus flag */ ReadStatus = 0; break; else /* Next address location */ Address = Address - 4; /* Return ReadStatus value: (0: variable exist, 1: variable doesn't exist)

43、 */ return ReadStatus;/* * brief Writes/upadtes variable data in EEPROM. * param VirtAddress: Variable virtual address * param Data: 16 bit data to be written * retval Success or error status: * - FLASH_COMPLETE: on success * - PAGE_FULL: if valid page is full * - NO_VALID_PAGE: if no valid page was

44、 found * - Flash error code: on write Flash error */uint16_t EE_WriteVariable(uint16_t VirtAddress, uint16_t Data) uint16_t Status = 0; /* Write the variable virtual address and value in the EEPROM */ Status = EE_VerifyPageFullWriteVariable(VirtAddress, Data); /* In case the EEPROM active page is fu

45、ll */ if (Status = PAGE_FULL) /* Perform Page transfer */ Status = EE_PageTransfer(VirtAddress, Data); /* Return last operation status */ return Status;/* * brief Erases PAGE0 and PAGE1 and writes VALID_PAGE header to PAGE0 * param None * retval Status of the last operation (Flash write or erase) done during * EEPROM formating */static FLASH_Status EE_Format(void) FLASH_Status FlashStatus = FLASH_COMPLETE; /* Erase Page0 */ FlashStatus = FLASH_ErasePage(PAGE0_BASE_ADDRESS); /* If erase operation was failed, a Flash error code