stm32flasheeprom断电保护数值存储程序Word下载.docx

1、h2© COPYRIGHT 2009 STMicroelectronics/h2 */* Define to prevent recursive inclusion -*/#ifndef _EEPROM_H#define _EEPROM_H/* Includes -*/#include stm32f10x.h/* Exported constants -*/* Define the STM32F10Xxx Flash page size depending on the used STM32 device */#if defined （STM32F10X_LD） | defined

2、（STM32F10X_MD） #define PAGE_SIZE （uint16_t）0x400 /* Page size = 1KByte */#elif defined （STM32F10X_HD） | defined （STM32F10X_CL） #define PAGE_SIZE （uint16_t）0x800 /* Page size = 2KByte */#endif/* EEPROM start address in Flash */#define EEPROM_START_ADDRESS （uint32_t）0x08010000） /* EEPROM emulation sta

3、rt address: after 64KByte of used Flash memory */* Pages 0 and 1 base and end addresses */#define PAGE0_BASE_ADDRESS （uint32_t）（EEPROM_START_ADDRESS + 0x000）#define PAGE0_END_ADDRESS （uint32_t）（EEPROM_START_ADDRESS + （PAGE_SIZE - 1）#define PAGE1_BASE_ADDRESS （uint32_t）（EEPROM_START_ADDRESS + PAGE_SI

4、ZE）#define PAGE1_END_ADDRESS （uint32_t）（EEPROM_START_ADDRESS + （2 * PAGE_SIZE - 1）/* Used Flash pages for EEPROM emulation */#define PAGE0 （uint16_t）0x0000）#define PAGE1 （uint16_t）0x0001）/* No valid page define */#define NO_VALID_PAGE （uint16_t）0x00AB）/* Page status definitions */#define ERASED （uin

5、t16_t）0xFFFF） /* PAGE is empty */#define RECEIVE_DATA （uint16_t）0xEEEE） /* PAGE is marked to receive data */#define VALID_PAGE （uint16_t）0x0000） /* PAGE 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）0

6、x01）/* Page full define */#define PAGE_FULL （uint8_t）0x80）/* Variables number */#define NumbOfVar （uint8_t）0x03）/* Exported types -*/* Exported macro -*/* Exported functions - */uint16_t EE_Init（void）;uint16_t EE_ReadVariable（uint16_t VirtAddress, uint16_t* Data）;uint16_t EE_WriteVariable（uint16_t V

7、irtAddress, uint16_t Data）;#endif /* _EEPROM_H */* （C） COPYRIGHT 2009 STMicroelectronics *END OF FILE*/*eeprom.c*/ * file EEPROM_Emulation/src/eeprom.c * brief This file provides all the EEPROM emulation firmware functions. */ /* addtogroup EEPROM_Emulation * eeprom.h/* Private typedef -*/* Private

8、define -*/* Private macro -*/* Private variables -*/* Global 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 -*/* Pr

9、ivate functions -*/static FLASH_Status EE_Format（void）;static 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 InitCurrWrAd

10、dress（void） FLASH_Status FlashStatus = FLASH_COMPLETE; uint16_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

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

12、 2） + （uint32_t）（1 + ValidPage） * PAGE_SIZE）; /* Check each active page address starting from begining */ while （CurWrAddress 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 retur

13、ned */ 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 （ *（_IO uint16_t*）（PAGE0_BASE_ADDRESS + 6） = VirtAddVarTabVarIdx） x = VarIdx; if （VarIdx != x） /* Read the last varia

14、bles updates */ ReadStatus = EE_ReadVariable（VirtAddVarTabVarIdx, &DataVar）; /* In case variable corresponding to the virtual address was found */ if （ReadStatus != 0x1） /* Transfer the variable to the Page0 */ EepromStatus = EE_VerifyPageFullWriteVariable（VirtAddVarTabVarIdx, DataVar）; if （EepromStatus ! return EepromStatus; /* Mark Page0 as valid */ FlashStatus = FLASH_ProgramHalfWord（PAGE0_BASE_ADDRESS, VALID_PAGE）; /* Erase Page1 */ FlashStatus = FLASH_ErasePage（PAGE1_BASE_ADDRESS）; else if （PageStatus1 = ERASED） /* Page0 receive, Page1 erased */ FlashStatus = FLA