[FDS] Limited space for storing data in the flash

[Chengxin Ma]

Hi,

I am trying to write some data into the flash of the nRF52832 SoC, but can only write around 5 kb of data. After that I will get an error of number 7, which should be related to FDS_ERR_NO_SPACE_IN_FLASH. (Definition is in pathto\SDK\components\libraries\fds\fds.h. The library I am using is Experimental: Flash Data Storage.) I am wondering:

1. Is it normal that only 5 kB is left for storing data? (I know that the SoftDevice (S132) takes 112 kB, and Total ROM Size (Code + RO Data + RW Data) is 48.62kB in my case. What else could take up a large amount of flash?)
2. Are there any tools for visualizing the flash usage dynamically?
3. Could the problem be caused by storing the data in an inappropriate way? (Currently I use the same file ID but different record keys for the entries, which in my opinion is the easiest way of labeling the entries. I tried to re-group this set of data with two file IDs, but still got the same error code.)

Kind Regards

[Chengxin Ma]

Can someone help me re-tag "fd" to "fds"? I don't see why it is truncated.

[Petter Myhre]

What SDK are you using? And what example?

[Chengxin Ma]

I am using SDK 11. I mainly referred to the official documentation and this example, but my code is part of a larger project and has changed a lot from the references. So this question is sort of a general one.

[gortok]

If you're sure you're deleting old records, you'll need to be sure to run fds_gc(); it's not run automatically. Generally I write -> run_gc -> run any pending softdevice actions after it's complete.

[Chengxin Ma]

@gortok: thanks for the suggestion, but in my case the problem persists even if I erase & reload the SoftDevice and the application.