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Merge pull request #249 from noisymime/master 

Add EEPROM.update() function
This commit is contained in:
Roger Clark 2017-05-25 20:32:24 +10:00 committed by GitHub
parent d3058d39f0 7c320774b1
commit 7de415531e
2 changed files with 24 additions and 0 deletions
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22
STM32F1/libraries/EEPROM/EEPROM.cpp
View File

@ -521,6 +521,28 @@ uint16 EEPROMClass::write(uint16 Address, uint16 Data)
return status;
}
/**
* @brief Writes/upadtes variable data in EEPROM.
The value is written only if differs from the one already saved at the same address.
* @param VirtAddress: Variable virtual address
* @param Data: 16 bit data to be written
* @retval Success or error status:
* - EEPROM_SAME_VALUE: If new Data matches existing EEPROM Data
* - FLASH_COMPLETE: on success
* - EEPROM_BAD_ADDRESS: if address = 0xFFFF
* - EEPROM_PAGE_FULL: if valid page is full
* - EEPROM_NO_VALID_PAGE: if no valid page was found
* - EEPROM_OUT_SIZE: if no empty EEPROM variables
* - Flash error code: on write Flash error
*/
uint16 EEPROMClass::update(uint16 Address, uint16 Data)
{
if (read(Address) == Data)
return EEPROM_SAME_VALUE;
else
return write(Address, Data);
}
/**
* @brief Return number of variable
* @retval Number of variables

2
STM32F1/libraries/EEPROM/EEPROM.h
View File

@ -47,6 +47,7 @@ enum : uint16
EEPROM_BAD_ADDRESS = ((uint16)0x0082),
EEPROM_BAD_FLASH = ((uint16)0x0083),
EEPROM_NOT_INIT = ((uint16)0x0084),
EEPROM_SAME_VALUE = ((uint16)0x0085),
EEPROM_NO_VALID_PAGE = ((uint16)0x00AB)
};
@ -67,6 +68,7 @@ public:
uint16 read (uint16 address);
uint16 read (uint16 address, uint16 *data);
uint16 write(uint16 address, uint16 data);
uint16 update(uint16 address, uint16 data);
uint16 count(uint16 *);
uint16 maxcount(void);