fds write not working FDS_ERR_NOT_INITIALIZED

RE: fds write not working FDS_ERR_NOT_INITIALIZED

thoric_fish — Sat, 31 Aug 2019 00:04:31 GMT

After moving the FDS related code outside of the BLE service, say to another function custom_fds(), would I still need a busy_wait between FDS init in pm_init and custom_fds()?

RE: fds write not working FDS_ERR_NOT_INITIALIZED

Vidar Berg — Thu, 29 Aug 2019 08:06:02 GMT

Hi,

I see the problem now; as you indicated earlier, the initialization is asynchronous, and the completion is reported to the registered FDS callback(s). This takes a bit longer on initial boot because FDS need to "tag" each of the allocated flash pages first. An easy solution to this is to add a busy-wait delay between FDS init in pm_init and when you initialize the service.

A better solution maybe is to restructure the code so that FDS related code is placed outside of the BLE service. Then you can more easily register the FDS users before fds_init(). ble_cus_custom_value_update() can be used to update the characteristic value once FDS is ready

The address of a "uin8_t" variable is not guaranteed to be word-aligned so you should prefix the variable definitions with __ALIGN(4):

__ALIGN(4) static uint8_t eight = 8;
__ALIGN(4) static uint8_t nine = 9;

RE: fds write not working FDS_ERR_NOT_INITIALIZED

thoric_fish — Thu, 29 Aug 2019 06:43:59 GMT

Hi Vidar,

I flashed the code you added, with some modifications that assigned the ret code of the fds write to the BLE custom characteristic. I attached the modified source and project files below. I am still getting a FDS_ERR_NOT_INITIALIZED error after I flash the code to my NRF52840 DK. But when I turn the DK off then back on the error I get is FDS_ERR_UNALIGNED_ADDR. I am not sure why I am still getting these errors using the code you provided.

I've also tried writing to new FILE_ID and REC_KEY, but I still get the same fds_write error. Do you have any suggestions on what else I should try to resolve these errors? Thanks!

devzone.nordicsemi.com/.../nordic_5F00_fds.zip

RE: fds write not working FDS_ERR_NOT_INITIALIZED

Vidar Berg — Wed, 28 Aug 2019 09:09:43 GMT

Hi,

I think I would need the modified source files to replicate the exact same issue. Guess the code snippet you included includes most of the relevant code, but the part where the FDS user gets registered appears to be missing. Anyway, instead, I took the template example from SDK 15.3.0 and added main.c and the ble service from Bjørn's git repo. Then moved the PM init before the service init and added the fds code.

My test project:

devzone.nordicsemi.com/.../ble_5F00_app_5F00_template.zip

RE: fds write not working FDS_ERR_NOT_INITIALIZED

thoric_fish — Tue, 27 Aug 2019 14:45:11 GMT

devzone.nordicsemi.com/.../ble_5F00_app_5F00_template_5F00_pca10056_5F00_s140.emProject.zip

Hi Vidar,

I uploaded the compressed SES project file here, if it doesn't open I can also provide just the c files I modified from the example code. Thanks!

RE: fds write not working FDS_ERR_NOT_INITIALIZED

Vidar Berg — Tue, 27 Aug 2019 12:09:31 GMT

Hi,

Can you upload the whole project so I can try debugging it here? The "initialised" flag should be set to true if fds_init() returns FDS_SUCCESS so it's strange that you later get this error when you write. I don't think it's related to the problem, but the documentation recommends to register all users first, then call fds_init().

Thanks

Vidar