Nordic 51822, SDK5.0.0 and SD6.0.0, pstorage not work?

RE: Nordic 51822, SDK5.0.0 and SD6.0.0, pstorage not work?

Ole Christian Tvedt — Sat, 06 Jun 2015 09:32:20 GMT

A related problem is debugger flash caching:

If your pstorage_sys_event_handler receives an NRF_SUCCESS on the write operation, but the debugger claims that the flash area still unwritten, make sure the debugger isn't caching the old values.

I'm using Segger J-Link over SWD, and the solution was to uncheck ☐ Allow caching of flash contents in the J-Link Control Panel (can be found in the system tray during debugging, if using Windows).

Note: This is not the solution to OP's problem, since he is checking the result using pstorage_load. I'm leaving this here since it is one of the first Google hits for the search terms I was using.

RE: Nordic 51822, SDK5.0.0 and SD6.0.0, pstorage not work?

Krishna Shingala — Fri, 17 Jan 2014 16:35:27 GMT

Are you using resident memory for the data source you provide to pstorage? No copy of data is made, hence it is required that 'test_data' contains valid data when flash write is actually executed.

Is it also possible for you to use nrfjprog to dump the flash page being used? Flash page being used for your registered module will be flashhandle.block_id.

RE: Nordic 51822, SDK5.0.0 and SD6.0.0, pstorage not work?

mira67 — Fri, 17 Jan 2014 02:03:54 GMT

Yes, I wait for a successful event for 'store' operation, then load the data, but always '0xFF'

RE: Nordic 51822, SDK5.0.0 and SD6.0.0, pstorage not work?

Paul — Mon, 13 Jan 2014 22:28:01 GMT

I am having similar issues. Do you have a sample application that uses pstorage_load.

RE: Nordic 51822, SDK5.0.0 and SD6.0.0, pstorage not work?

Krishna Shingala — Tue, 07 Jan 2014 16:07:29 GMT

Hi again,

I sit possible to confirm that you are issuing pstorage_load once you have received a successful event for 'store' operation? Else you would be reading stale data. Thanks!

RE: Nordic 51822, SDK5.0.0 and SD6.0.0, pstorage not work?

mira67 — Fri, 03 Jan 2014 18:17:32 GMT

a. Enabling SoftDevice and registering to receive System events? Yes. I followed the heart rate example, enabled SD, also registered system evt and called 'pstorage_sys_event_handler' from system evt dispatcher. b. Ensuring that the system events are being dispatched to the PStorage module? Yes. c. Receiving events notifying the application of clear and store operations being successful apart API returning a success? Note: Load operation does not need any events and data is returned immediately to the application. Yes, I initialized a handler for operation completion notification. After I got the successful clear completion notification, store some data; after I got the successful store notification, load some data, but the data from pstorage_load is still all '0xFF'.

RE: Nordic 51822, SDK5.0.0 and SD6.0.0, pstorage not work?

Krishna Shingala — Fri, 03 Jan 2014 09:19:46 GMT

Hi,

Couple of things to know before getting to specifics:

a. Earlier flash_page_erase API was a blocking API, however, flash operations have now been moved to SoftDevice and are non blocking. Therefore even though the API returns immediately with a success, the operation is not complete unless an event is received from SoftDevice.

b. PStorage API aim to to provide a consistent interfacing to any flash operation and do not access the flash itself. In the current one, it makes of SoftDevice API to have data stored persistently. Therefore, it is important that SoftDevice is enabled in order to access flash for PStorage to work as expected.

c. Lastly, SoftDevice has restriction of permitting only one flash operation at a time. PStorage hence implements a queue which is serviced when SoftDevice notifies flash access to be complete. Hence, it is important 'pstorage_sys_event_handler' is called from system event dispatcher of the application. And it is very important that application registers to receive system event using 'softdevice_sys_evt_handler_set' API.

Now getting to specifics, can you confirm that you are: a. Enabling SoftDevice and registering to receive System events? b. Ensuring that the system events are being dispatched to the PStorage module? c. Receiving events notifying the application of clear and store operations being successful apart API returning a success? Note: Load operation does not need any events and data is returned immediately to the application.