Prefill FDS area while programming via SWD

RE: Prefill FDS area while programming via SWD

bjorn-spockeli — Thu, 11 Apr 2019 12:16:23 GMT

Record key: provided by the user and used for lookup
Data length: expressed in number of 4-byte words
File ID: provided by the user and used for lookup
CRC16: optional CRC16 check value (checks can be enabled by setting the FDS_CRC_ENABLED compile flag)
Record ID: unique identifier generated by the system

Yes, I think the easiest approach is what you suggested. Load the data over BLE to one device and then readback the flash. Is the data stored by FDS identical for all the devices?

RE: Prefill FDS area while programming via SWD

Andy — Thu, 11 Apr 2019 11:37:03 GMT

[quote userid="62280" url="~/f/nordic-q-a/45975/prefill-fds-area-while-programming-via-swd/181532"]Maybe it is easier to just flash a module normally, upload the data via ble and the read back the full flash and use that for production ?[/quote]

Yes, that's what I would do. I would read the flash contents of a device that already has the desired data, create a hex file out of that data, and I would use mergehex to create a single hex file for production.

RE: Prefill FDS area while programming via SWD

2PrintBeta — Thu, 11 Apr 2019 10:30:06 GMT

Thank you for this information.

I looked at: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.0.0%2Flib_fds.html which describes the memory format. It seem pretty straight forward, but i have a few questions.

Record ID and File ID are presumably the IDs used in the FDS API, but then what is the RECORD_KEY ? Also which checksum algorithm is used for the CRC ?

Maybe it is easier to just flash a module normally, upload the data via ble and the read back the full flash and use that for production ?

RE: Prefill FDS area while programming via SWD

bjorn-spockeli — Thu, 11 Apr 2019 08:15:26 GMT

Dominik: Yes, it possible to flash data to the FDS area as long as you follow the format used by FDS to store records. Do you need any details or are you able to manage this yourself?

Best regards

Bjørn

RE: Prefill FDS area while programming via SWD

Andy — Tue, 09 Apr 2019 19:21:27 GMT

It is possible. You just have to make sure that the data is written where it’s supposed to and that it has the expected format.