NRF51822 Flash write ,lead to undesirable value

RE: NRF51822 Flash write ,lead to undesirable value

Artucas — Sat, 12 Nov 2016 05:54:00 GMT

Good to hear. Please mark the question as answered then. You can do it by pressing gray button next to my answer. Or if it was Petters comment that solved your problem, then convert his comment to an answer and mark as accepted.

RE: NRF51822 Flash write ,lead to undesirable value

Songplus — Sat, 12 Nov 2016 05:38:43 GMT

Thank you.Yesterday I tried as you said,and succeed.Thank you.

RE: NRF51822 Flash write ,lead to undesirable value

Songplus — Sat, 12 Nov 2016 05:34:36 GMT

Thank you.You are right.I have fixed the bug.

RE: NRF51822 Flash write ,lead to undesirable value

Petter Myhre — Fri, 11 Nov 2016 13:01:28 GMT

You shouldn't wait a fixed time before the flash operation is finished, to be sure that it is finished you should wait until you get the event in the callback handler. See this. If you do a clear operation you should wait for the PSTORAGE_CLEAR_OP_CODE event before you write.

RE: NRF51822 Flash write ,lead to undesirable value

Artucas — Fri, 11 Nov 2016 09:23:38 GMT

Oh, i did not notice that you are doing flash erase. You are correct, if you are erasing flash and then trying to write it with pstorage_store(); it should work fine. The pstorage_update(); actually does the same thing for you. It first erases the flash area and then writes to it the new data. It is just for the convenience. If you are doing erase and then writing, there should be no difference.

RE: NRF51822 Flash write ,lead to undesirable value

Songplus — Fri, 11 Nov 2016 03:27:31 GMT

Thank you for your anser.Before wirting to the flash,I have erased ,There should not be dirty on the flash,So I think there isn't wrong.Besides,I don't know what the mechanism of pstorage_update() is.Would it work steadily? I will try it ,TKS.

RE: NRF51822 Flash write ,lead to undesirable value

Artucas — Thu, 10 Nov 2016 08:33:51 GMT

If you want to update the contents of flash memory, you can't use pstorage_store(); for every time you want to write something to flash. That is valid only for the first time. If you want to update flash contents to which you have already written, you should use pstorage_update(); instead. Using pstorage_store(); on a flash region which was already written might cause unpredictable results. I have recently also tried to run pstorage module and i got everything working correct, but i did it on S110 V8. You can check it here pstorage_update callback