mirror of https://github.com/ArduPilot/ardupilot
134 lines
4.7 KiB
C++
134 lines
4.7 KiB
C++
#pragma once
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#include "stm32f4xx_flash.h"
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#include <stdio.h>
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/* Page status definitions */
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#define EEPROM_ERASED ((uint16_t)0xFFFF) /* PAGE is empty */
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#define EEPROM_RECEIVE_DATA ((uint16_t)0xEEEE) /* PAGE is marked to receive data */
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#define EEPROM_VALID_PAGE ((uint16_t)0xAAAA) /* 1st PAGE containing valid data */
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#define ADDRESS_MASK 0x3fff // valid address always below it - 16K of EEPROM max
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#define FLAGS_MASK (~ADDRESS_MASK) // if this bits are set then we have partially written slot
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/* Page full define */
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enum {
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EEPROM_OK = 0x00,
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EEPROM_OUT_SIZE = 0x81,
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EEPROM_BAD_ADDRESS = 0x82,
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EEPROM_BAD_FLASH = 0x83,
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EEPROM_NOT_INIT = 0x84,
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EEPROM_WRITE_FAILED = 0x96,
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EEPROM_NO_VALID_PAGE = 0xAB
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};
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#define EEPROM_DEFAULT_DATA 0xFFFF
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#define FLASH_CR_ERRIE ((uint32_t)0x02000000) // not in stm32f4xx.h somehow
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class EEPROMClass
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{
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public:
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typedef void (*func_t)(uint8_t page);
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EEPROMClass(void);
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uint16_t init(uint32_t, uint32_t, uint32_t);
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/**
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* @brief Erases PAGE0 and PAGE1 and writes EEPROM_VALID_PAGE / 0 header to PAGE0
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* @param PAGE0 and PAGE1 base addresses
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* @retval _status of the last operation (Flash write or erase) done during EEPROM formating
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*/
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uint16_t format(void);
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/**
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* @brief Returns the erase counter for current page
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* @param Data: Global variable contains the read variable value
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* @retval Success or error status:
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* - EEPROM_OK: if erases counter return.
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* - EEPROM_NO_VALID_PAGE: if no valid page was found.
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*/
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uint16_t erases(uint16_t *);
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/**
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* @brief Returns the last stored variable data, if found,
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* which correspond to the passed virtual address
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* @param Address: Variable virtual address
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* @param Data: Pointer to data variable
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* @retval Success or error status:
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* - EEPROM_OK: if variable was found
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* - EEPROM_BAD_ADDRESS: if the variable was not found
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* - EEPROM_NO_VALID_PAGE: if no valid page was found.
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*/
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uint16_t read (uint16_t address, uint16_t *data);
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/**
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* @brief Returns the last stored variable data, if found,
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* which correspond to the passed virtual address
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* @param Address: Variable virtual address
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* @retval Data for variable or EEPROM_DEFAULT_DATA, if any errors
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*/
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inline uint16_t read (uint16_t address) {
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uint16_t data;
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read(address, &data);
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return data;
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}
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/**
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* @brief Writes/upadtes variable data in EEPROM.
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* @param VirtAddress: Variable virtual address
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* @param Data: 16 bit data to be written
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* @retval Success or error status:
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* - FLASH_COMPLETE: on success
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* - EEPROM_BAD_ADDRESS: if address = 0xFFFF
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* - EEPROM_PAGE_FULL: if valid page is full
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* - EEPROM_NO_VALID_PAGE: if no valid page was found
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* - EEPROM_OUT_SIZE: if no empty EEPROM variables
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* - Flash error code: on write Flash error
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*/
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uint16_t write(uint16_t address, uint16_t data);
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/**
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* @brief Return number of variable
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* @retval Number of variables
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*/
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uint16_t count(uint16_t *data);
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inline uint16_t maxcount(void) { return (PageSize / 4)-1; }
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static FLASH_Status write_16(uint32_t addr, uint16_t data);
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static FLASH_Status write_8(uint32_t addr, uint8_t data);
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static void FLASH_Lock_check();
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static void FLASH_Unlock_dis();
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static inline uint32_t read_16(uint32_t addr){
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return *(__IO uint16_t*)addr;
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}
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static inline uint32_t read_32(uint32_t addr){
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return *(__IO uint32_t*)addr;
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}
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uint16_t _CheckErasePage(uint32_t, uint16_t);
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static FLASH_Status _ErasePageByAddress(uint32_t Page_Address);
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static void FLASH_OB_WRPConfig(uint32_t OB_WRP, FunctionalState NewState);
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private:
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uint32_t PageBase0; // uses 2 flash pages
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uint32_t PageBase1;
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uint32_t PageSize;
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uint16_t _status;
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uint16_t _init(void);
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uint16_t _format(void);
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FLASH_Status _ErasePage(uint32_t);
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uint16_t _CheckPage(uint32_t, uint16_t);
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uint16_t _Format(void);
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uint32_t _FindValidPage(void);
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uint16_t _GetVariablesCount(uint32_t, uint16_t);
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uint16_t _PageTransfer(uint32_t, uint32_t, uint16_t);
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uint16_t _VerifyPageFullWriteVariable(uint16_t, uint16_t);
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};
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extern EEPROMClass EEPROM;
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