When the app timer is started and the timing time is less than 8Ms, fstore cannot be used to write user data

RE: When the app timer is started and the timing time is less than 8Ms, fstore cannot be used to write user data

summer — Tue, 07 Apr 2020 08:14:38 GMT

ok,thank you very much, I know what to do.

RE: When the app timer is started and the timing time is less than 8Ms, fstore cannot be used to write user data

Vidar Berg — Tue, 07 Apr 2020 08:09:12 GMT

It will likely prevent the NRF_ERROR_NO_MEM error and should be ok as long as you do this infrequently. For more frequent flash operations I would recommend using the FDS filesystem on top because it leads to fewer page erases and provide basic wear leveling for flash. Note that the Absolute maximum ratings specify the flash endurance to 10 000 cycles.

RE: When the app timer is started and the timing time is less than 8Ms, fstore cannot be used to write user data

summer — Tue, 07 Apr 2020 07:15:09 GMT

Thank you very much. when I erase flash, I stop the timer and wait for the flash write to complete,and then turn on the timer,may I ask if this method is ok? Is there a better way?

RE: When the app timer is started and the timing time is less than 8Ms, fstore cannot be used to write user data

Vidar Berg — Tue, 07 Apr 2020 06:33:20 GMT

Hi,

Thanks for the log. The assertion is occurring in the app timer because you have run out of space in the app scheduler queue. You may try to increase the size of 'SCHED_QUEUE_SIZE' to see if it helps. But keep in mind that flash erase operations take around 90 ms to complete, so you will eventually run out of queues if you repeat this operation every 8 ms.

RE: When the app timer is started and the timing time is less than 8Ms, fstore cannot be used to write user data

summer — Tue, 07 Apr 2020 01:03:42 GMT

hi ,When I erase flash using nrf_fstorage_erase, the err_code returned is 0x0000000,as shown in the following figure:

When I turned on the debug log, the log data was printed as follows:

May I ask what I should do? thanks.

RE: When the app timer is started and the timing time is less than 8Ms, fstore cannot be used to write user data

Vidar Berg — Mon, 06 Apr 2020 11:28:02 GMT

Hi,

Are you able to check what the returned error from nrf_fstorage_write() is? Or do you get the error in your fstorage callback?