fs_store doesn't update memory

RE: fs_store doesn't update memory

zhu.ky — Tue, 06 Jun 2017 05:44:50 GMT

i have meet the same promble ,i try it ,when write data to flash ,it must erase the flash first ,then write data to flash .

RE: fs_store doesn't update memory

emdi — Mon, 14 Nov 2016 08:30:43 GMT

To answer your question:

'Writing' to flash means pulling bits set to one to zero, 1 -> 0. So basically if you write something in a location in flash, you can't update it without erasing the page (which flips its bits back to one).
No, there is no way to partially erase a page.

In short, fstorage does not have an update operation but Flash Data Storage (fds) does. I suggest you take a look at fds usage documentation to get started, you can find it here: infocenter.nordicsemi.com/index.jsp

There was a great post about flash libraries in the SDK. I looked it up for you: devzone.nordicsemi.com/.../

RE: fs_store doesn't update memory

Artucas — Sun, 13 Nov 2016 20:59:12 GMT

Hi, i don't really know for the new SDK, but don't you have something like fs_update();? In older SDK we had pstorage_update(); to update a piece of flash memory, and that operation was handled everything for you. That have been said, it is normally in every mcu first to delete the flash data before writing to it. It is jus that pstorage_update(); used to handle both those operations.