Using Flash as EEPROM

Official Hardware Nano Family Nano 33 IoT
1

I've found 2 different libraries to implement this:

FlashAsEEPROM
FlashStorage

I already know they're accessed in different ways, but Is there any significant difference in their implementation ?

2

How is this interconnected (where is the FLASH)? What processor are you using. With that information you might get an accurate answer.

3

Seeeduino Xiao SAMD21 using the built-in flash, no eeprom available

A domingo, 24/12/2023, 20:22, gilshultz via Arduino Forum <notifications@arduino.discoursemail.com> escreveu:

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So What is your question? I use FRAM, it is fast and inexpensive. Nice thing about it can be obtained as a I2C or SPI or parallel interface.

1 Like
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Maybe a link to the library in question will make it easier for the forum helpers to understand the question:

@pjrebordao already explained it, but it seems to have been missed so I'll emphasize that this is about using the flash memory in the microcontroller for non-volatile storage; not about using an external storage device.

@pjrebordao are you certain they are two different libraries? The "FlashStorage" library contains a header file named FlashAsEEPROM.h:

A common error in the Arduino community is referring to header files as "libraries". A library is package of code that may consist of multiple header files. It is incorrect to refer to each of those header files as a separate library. Even though it is a common convention for one of the header files to have a name similar to the library name, you should not assume that the header filename is the library name.

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Thanks @ptillisch
It's in fact the same lib with several headers.
As for the original issue that prompted this, it's solved.

A hardware reset was making my stored variables disappear, but an EEPROM.commit() was missing...

Thanks

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