stm32flasheeprom断电保护数值存储程序Word下载.docx
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h2>
<
center>
&
copy;
COPYRIGHT2009STMicroelectronics<
/center>
/h2>
*/
/*Definetopreventrecursiveinclusion-------------------------------------*/
#ifndef__EEPROM_H
#define__EEPROM_H
/*Includes------------------------------------------------------------------*/
#include"
stm32f10x.h"
/*Exportedconstants--------------------------------------------------------*/
/*DefinetheSTM32F10XxxFlashpagesizedependingontheusedSTM32device*/
#ifdefined（STM32F10X_LD）||defined（STM32F10X_MD）
#definePAGE_SIZE（uint16_t）0x400/*Pagesize=1KByte*/
#elifdefined（STM32F10X_HD）||defined（STM32F10X_CL）
#definePAGE_SIZE（uint16_t）0x800/*Pagesize=2KByte*/
#endif
/*EEPROMstartaddressinFlash*/
#defineEEPROM_START_ADDRESS（（uint32_t）0x08010000）/*EEPROMemulationstartaddress:
after64KByteofusedFlashmemory*/
/*Pages0and1baseandendaddresses*/
#definePAGE0_BASE_ADDRESS（（uint32_t）（EEPROM_START_ADDRESS+0x000））
#definePAGE0_END_ADDRESS（（uint32_t）（EEPROM_START_ADDRESS+（PAGE_SIZE-1）））
#definePAGE1_BASE_ADDRESS（（uint32_t）（EEPROM_START_ADDRESS+PAGE_SIZE））
#definePAGE1_END_ADDRESS（（uint32_t）（EEPROM_START_ADDRESS+（2*PAGE_SIZE-1）））
/*UsedFlashpagesforEEPROMemulation*/
#definePAGE0（（uint16_t）0x0000）
#definePAGE1（（uint16_t）0x0001）
/*Novalidpagedefine*/
#defineNO_VALID_PAGE（（uint16_t）0x00AB）
/*Pagestatusdefinitions*/
#defineERASED（（uint16_t）0xFFFF）/*PAGEisempty*/
#defineRECEIVE_DATA（（uint16_t）0xEEEE）/*PAGEismarkedtoreceivedata*/
#defineVALID_PAGE（（uint16_t）0x0000）/*PAGEcontainingvaliddata*/
/*Validpagesinreadandwritedefines*/
#defineREAD_FROM_VALID_PAGE（（uint8_t）0x00）
#defineWRITE_IN_VALID_PAGE（（uint8_t）0x01）
/*Pagefulldefine*/
#definePAGE_FULL（（uint8_t）0x80）
/*Variables'
number*/
#defineNumbOfVar（（uint8_t）0x03）
/*Exportedtypes------------------------------------------------------------*/
/*Exportedmacro------------------------------------------------------------*/
/*Exportedfunctions-------------------------------------------------------*/
uint16_tEE_Init（void）;
uint16_tEE_ReadVariable（uint16_tVirtAddress,uint16_t*Data）;
uint16_tEE_WriteVariable（uint16_tVirtAddress,uint16_tData）;
#endif/*__EEPROM_H*/
/*******************（C）COPYRIGHT2009STMicroelectronics*****ENDOFFILE****/
/*************eeprom.c*************/
*@fileEEPROM_Emulation/src/eeprom.c
*@briefThisfileprovidesalltheEEPROMemulationfirmwarefunctions.
*/
/**@addtogroupEEPROM_Emulation
*@{
eeprom.h"
/*Privatetypedef-----------------------------------------------------------*/
/*Privatedefine------------------------------------------------------------*/
/*Privatemacro-------------------------------------------------------------*/
/*Privatevariables---------------------------------------------------------*/
/*Globalvariableusedtostorevariablevalueinreadsequence*/
uint16_tDataVar=0;
uint32_tCurWrAddress;
/*Virtualaddressdefinedbytheuser:
0xFFFFvalueisprohibited*/
uint16_tVirtAddVarTab[NumbOfVar];
/*Privatefunctionprototypes-----------------------------------------------*/
/*Privatefunctions---------------------------------------------------------*/
staticFLASH_StatusEE_Format（void）;
staticuint16_tEE_FindValidPage（uint8_tOperation）;
staticuint16_tEE_VerifyPageFullWriteVariable（uint16_tVirtAddress,uint16_tData）;
staticuint16_tEE_PageTransfer（uint16_tVirtAddress,uint16_tData）;
//初始化写地址，减少每次读写时查询时间
uint16_tInitCurrWrAddress（void）
{
FLASH_StatusFlashStatus=FLASH_COMPLETE;
uint16_tValidPage=PAGE0;
//uint32_tAddress;
uint32_tPageEndAddress;
/*GetvalidPageforwriteoperation*/
ValidPage=EE_FindValidPage（WRITE_IN_VALID_PAGE）;
/*Checkifthereisnovalidpage*/
if（ValidPage==NO_VALID_PAGE）
{
CurWrAddress=（uint32_t）（EEPROM_START_ADDRESS+（uint32_t）（ValidPage*PAGE_SIZE））;
returnNO_VALID_PAGE;
}
/*GetthevalidPagestartAddress*/
//Address=（uint32_t）（EEPROM_START_ADDRESS+（uint32_t）（ValidPage*PAGE_SIZE））;
/*GetthevalidPageendAddress*/
PageEndAddress=（uint32_t）（（EEPROM_START_ADDRESS-2）+（uint32_t）（（1+ValidPage）*PAGE_SIZE））;
/*Checkeachactivepageaddressstartingfrombegining*/
while（CurWrAddress<
PageEndAddress）
/*VerifyifAddressandAddress+2contentsare0xFFFFFFFF*/
if（（*（__IOuint32_t*）CurWrAddress）==0xFFFFFFFF）
/*Setvariablevirtualaddress*/
FlashStatus=FLASH_COMPLETE;
/*Returnprogramoperationstatus*/
returnFlashStatus;
else
/*Nextaddresslocation*/
CurWrAddress=CurWrAddress+4;
/*ReturnPAGE_FULLincasethevalidpageisfull*/
returnPAGE_FULL;
}
*@briefRestorethepagestoaknowngoodstateincaseofpage'
sstatus
*corruptionafterapowerloss.
*@paramNone.
*@retval-Flasherrorcode:
onwriteFlasherror
*-FLASH_COMPLETE:
onsuccess
uint16_t__EE_Init（void）
uint16_tPageStatus0=6,PageStatus1=6;
uint16_tVarIdx=0;
uint16_tEepromStatus=0,ReadStatus=0;
int16_tx=-1;
uint16_tFlashStatus;
/*GetPage0status*/
PageStatus0=（*（__IOuint16_t*）PAGE0_BASE_ADDRESS）;
/*GetPage1status*/
PageStatus1=（*（__IOuint16_t*）PAGE1_BASE_ADDRESS）;
/*Checkforinvalidheaderstatesandrepairifnecessary*/
switch（PageStatus0）
caseERASED:
if（PageStatus1==VALID_PAGE）/*Page0erased,Page1valid*/
/*ErasePage0*/
FlashStatus=FLASH_ErasePage（PAGE0_BASE_ADDRESS）;
/*Iferaseoperationwasfailed,aFlasherrorcodeisreturned*/
if（FlashStatus!
=FLASH_COMPLETE）
elseif（PageStatus1==RECEIVE_DATA）/*Page0erased,Page1receive*/
/*MarkPage1asvalid*/
FlashStatus=FLASH_ProgramHalfWord（PAGE1_BASE_ADDRESS,VALID_PAGE）;
/*Ifprogramoperationwasfailed,aFlasherrorcodeisreturned*/
else/*FirstEEPROMaccess（Page0&
1areerased）orinvalidstate->
formatEEPROM*/
/*ErasebothPage0andPage1andsetPage0asvalidpage*/
FlashStatus=EE_Format（）;
/*Iferase/programoperationwasfailed,aFlasherrorcodeisreturned*/
break;
caseRECEIVE_DATA:
if（PageStatus1==VALID_PAGE）/*Page0receive,Page1valid*/
/*TransferdatafromPage1toPage0*/
for（VarIdx=0;
VarIdx<
NumbOfVar;
VarIdx++）
if（（*（__IOuint16_t*）（PAGE0_BASE_ADDRESS+6））==VirtAddVarTab[VarIdx]）
x=VarIdx;
if（VarIdx!
=x）
/*Readthelastvariables'
updates*/
ReadStatus=EE_ReadVariable（VirtAddVarTab[VarIdx],&
DataVar）;
/*Incasevariablecorrespondingtothevirtualaddresswasfound*/
if（ReadStatus!
=0x1）
/*TransferthevariabletothePage0*/
EepromStatus=EE_VerifyPageFullWriteVariable（VirtAddVarTab[VarIdx],DataVar）;
if（EepromStatus!
returnEepromStatus;
/*MarkPage0asvalid*/
FlashStatus=FLASH_ProgramHalfWord（PAGE0_BASE_ADDRESS,VALID_PAGE）;
/*ErasePage1*/
FlashStatus=FLASH_ErasePage（PAGE1_BASE_ADDRESS）;
elseif（PageStatus1==ERASED）/*Page0receive,Page1erased*/
FlashStatus=FLA
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