Contents
How do I use STM32 EEPROM?
- Here I am first erasing the entire EEPROM.
- Then load the data into the write buffer. This data is just the ascii characters.
- Now write the data to the EEPROM at the 3rd page with an offset of 10 bytes.
- And finally start reading from the beginning of the first page to see if the offset was set or not.
Does STM32 have EEPROM?
STM32 ARM uC’s like STM32F103 do not have EEPROM, so it is emulated by a software library.
How does Flash emulated EEPROM work?
To emulate byte- writeable EEPROM memory in a Flash device, it is necessary to perform a read-modify-write operation. To ensure data integrity, at least two pages of Flash memory must be defined as “EEPROM space” so that a valid EEPROM image is always present in the device.
How do you use EEPROM?
Read Something Reading from the EEPROM basically follows the same three step process as writing to the EEPROM: Send the Most Significant Byte of the memory address that you want to write to. Send the Least Significant Byte of the memory address that you want to write to. Ask for the data byte at that location.
What is emulated EEPROM?
The Emulated EEPROM component emulates an EEPROM device in the flash memory of a PSoC, providing simplified access to non-volatile memory.
Can a STM32 device work with an EEPROM?
Since we are using I2C, so the code remains same across all the STM32 Devices that supports I2C. Also I will try to write a more generalized code, so that you can also use it for other EEPROMs that works on I2C. The code can now write the float values and the integer values to the EEPROM Flash memory. There is noting special here.
Can a STM32 flash memory be used multiple times?
With most external flash memories, you can actually write to a page multiple times without erasing as long as you are writing to previously-unused byte locations. Please see this answer. However, the internal flash memory controller in the STM32’s won’t allow any writes unless the entire page is cleared.
When to use EEPROM instead of regular flash?
It is useful for storing settings or calibration data. Regular flash (that stores code) can also be used, but the EEPROM can be updated byte-by-byte and is independent from regular flash. This may come handy during application updating, as whole flash can be simply erased without affecting the EEPROM.
Is there Hal driver for STM32 flash memory?
ST Microelectronics did provide sample code using HAL drivers. The problem is their documentation is all over the place and googling may not land you the right page. This is the right document for you.