I want to write data to flash, but how do I know which addresses are available?

RE: I want to write data to flash, but how do I know which addresses are available?

Simonr — Thu, 25 Jul 2024 12:38:59 GMT

That would be the flash available that is not used by the SoftDevice or application in your project. How to define an instance and what addresses to use is explained here: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fsdk_nrf5_v17.0.2%2Flib_fds.html

You will have to familiarize yourself with the FDS library and API to do this correctly. You can also check out the Flash Data Storage or Flash Storage example projects here for a template.

Best regards,

Simon

RE: I want to write data to flash, but how do I know which addresses are available?

Mark — Mon, 22 Jul 2024 05:46:00 GMT

Hello,

I use Keil + nRF5 SDK.

How do I know which addresses are available if I use these?

RE: I want to write data to flash, but how do I know which addresses are available?

Susheel Nuguru — Fri, 19 Jul 2024 06:03:46 GMT

Then please check the fstorage module. Note that it is highly recommended to use the newer nRF Connect SDK based on Zephyr RTOS for any new project developments to get new features and patches. Not sure why you want to use a very old SDK version?

RE: I want to write data to flash, but how do I know which addresses are available?

Mark — Fri, 19 Jul 2024 00:28:30 GMT

Hello,

I use nRF5 SDK.

RE: I want to write data to flash, but how do I know which addresses are available?

Susheel Nuguru — Thu, 18 Jul 2024 06:32:11 GMT

Which SDK version are you using? I am assuming that you are using nRF Connect SDK.

You can try the NVS API in the Zephyr subsystem. You can find the sample at ncs\v2.x.x\zephyr\samples\subsys\nvs\src and the documentation for the sample here.

RE: I want to write data to flash, but how do I know which addresses are available?

Mark — Thu, 18 Jul 2024 04:01:16 GMT

Hello,

Is there any other method? This method is a little difficult for me to operate.

Thank you.

RE: I want to write data to flash, but how do I know which addresses are available?

Susheel Nuguru — Tue, 16 Jul 2024 05:06:34 GMT

Please take a look at the settings library in the Zephyr which gives you a very high level API to write to non volatile memory when you do not know which address to write to. You can use the default set partition in the system as this most likely will be initialized and used by other parts of the zephyr subsystem (in a non conflicting way) and your application can still use the API.

A sample for this can be seen here