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eeprom_stm32: implement wear leveling

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This commit is contained in:
Ilya Zhuravlev
2020-12-26 06:18:20 -05:00
parent 80e488bfae
commit f8638a95e7
2 changed files with 105 additions and 85 deletions
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19
tmk_core/common/chibios/eeprom_stm32.h
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@ -43,7 +43,7 @@
#ifndef EEPROM_PAGE_SIZE
# if defined(MCU_STM32F103RB)
# define FEE_PAGE_SIZE (uint16_t)0x400 // Page size = 1KByte
# define FEE_DENSITY_PAGES 2 // How many pages are used
# define FEE_DENSITY_PAGES 8 // How many pages are used
# elif defined(MCU_STM32F103ZE) || defined(MCU_STM32F103RE) || defined(MCU_STM32F103RD) || defined(MCU_STM32F303CC) || defined(MCU_STM32F072CB)
# define FEE_PAGE_SIZE (uint16_t)0x800 // Page size = 2KByte
# define FEE_DENSITY_PAGES 4 // How many pages are used
@ -66,18 +66,21 @@
# endif
#endif
// DONT CHANGE
// Choose location for the first EEPROM Page address on the top of flash
/* Start of the emulated eeprom flash area */
#define FEE_PAGE_BASE_ADDRESS ((uint32_t)(0x8000000 + FEE_MCU_FLASH_SIZE * 1024 - FEE_DENSITY_PAGES * FEE_PAGE_SIZE))
#define FEE_DENSITY_BYTES ((FEE_PAGE_SIZE / 2) * FEE_DENSITY_PAGES - 1)
/* End of the emulated eeprom flash area */
#define FEE_LAST_PAGE_ADDRESS (FEE_PAGE_BASE_ADDRESS + (FEE_PAGE_SIZE * FEE_DENSITY_PAGES))
/* Size of emulated eeprom */
#define FEE_DENSITY_BYTES 1024
/* Flash word value after erase */
#define FEE_EMPTY_WORD ((uint16_t)0xFFFF)
#define FEE_ADDR_OFFSET(Address) (Address * 2) // 1Byte per Word will be saved to preserve Flash
// Use this function to initialize the functionality
uint16_t EEPROM_Init(void);
_Static_assert(FEE_DENSITY_PAGES * FEE_PAGE_SIZE >= FEE_DENSITY_BYTES * 8,
"flash memory for emulated eeprom is too small; for correct functionality ensure it is at least 8x FEE_DENSITY_BYTES");
void EEPROM_Init(void);
void EEPROM_Erase(void);
uint16_t EEPROM_WriteDataByte(uint16_t Address, uint8_t DataByte);
void EEPROM_WriteDataByte(uint16_t Address, uint8_t DataByte);
uint8_t EEPROM_ReadDataByte(uint16_t Address);
#endif /* __EEPROM_H */