Use STM32H750 Internal Flash

[SMj.1]

I'm using STM32H750
Is it possible to read and write like EEPROM in a specific part of the program (the last part of the internal flash area?)?
I think it's impossible because there's only one sector
If possible, I would appreciate it if you could give me an example

[Andrew Neil]

---

@SMj.1 wrote:

Is it possible to read and write like EEPROM example

---

No - not exactly.

The biggest difference between Flash and what's commonly called "EEPROM"^[1] is that Flash can only be erased a page at a time; that's general - not specific to STM32.

In STM32s, there's also often a limitation that you can't write just a single byte.

But, of course, there are software workarounds to give something which looks like "EEPROM" - ie, to emulate EEPROM.

See:

EEPROM in STM32H7 series

EEPROM emulation on STM32H7

and more ...

 

[1] Literally, EEPROM stands for Electrically-Erasable and Programmable Read-Only Memory so, on that basis, Flash is EEPROM.

But I take it that you're talking about "EEPROM" in the sense of non-volatile memory where you can read & write individual bytes at will?

[MM..1]

Simply no, but too with one sector you can do it, with good power reserve control safe.

Simply on point you fill and require erase , place code to ram and copy of boot to ram erase and write boot back...

[Andrew Neil]

The ST implementation uses (at least) two sectors - so you won't lose everything if power dies during erasing one of them.

Using multiple sectors also helps with wear-levelling ...

[MM..1]

FYI H750 is one sector model.