flash Read Exception

RE: flash Read Exception

Petter Myhre — Wed, 06 Jan 2016 12:11:06 GMT

I'm don't quite understand your last comment, but the flag is in PSTORAGE_CLEAR_OP_CODE, and you will get this event if you call pstorage_clear(). If you call pstorage_update(), you will get the PSTORAGE_UPDATE_OP_CODE event. You should check that you get this event before you call sd_power_system_off(), for example by using a flag.

RE: flash Read Exception

chad.ou — Wed, 06 Jan 2016 11:25:55 GMT

“Maybe you should add some code in case PSTORAGE_UPDATE_OP_CODE:”I just feel the need for a flag here，“pstorage_wait_flag ”The Flag indicates success。

RE: flash Read Exception

Petter Myhre — Wed, 06 Jan 2016 10:49:39 GMT

I can't see any call to sd_power_system_off(). Are you sure all flash operations are complete when you call it? When are you calling it? Maybe you should add some code in case PSTORAGE_UPDATE_OP_CODE:?

RE: flash Read Exception

chad.ou — Wed, 06 Jan 2016 01:59:14 GMT

Link part of the code of Flash operation link text

RE: flash Read Exception

chad.ou — Tue, 05 Jan 2016 15:26:14 GMT

Sorry, I still study how to put the code up here。

RE: flash Read Exception

Petter Myhre — Tue, 05 Jan 2016 15:21:47 GMT

Next time, please edit your question and add the code there. I can't see any call to sd_power_system_off(). Are you sure all flash operations are complete when you call it? When are you calling it? Maybe you should add some code in case PSTORAGE_UPDATE_OP_CODE:?

RE: flash Read Exception

chad.ou — Tue, 05 Jan 2016 15:07:14 GMT

Thank Petter reply, I tested is from the normal working pstorage_update, then sd_power_system_off, wake up, pstorage_load, pstorage_update, such a cycle. There may be some data becomes 0xff pstorage_updat that after more than twenty normal cycle. In writing to flash when there callback handler.

RE: flash Read Exception

Petter Myhre — Tue, 05 Jan 2016 13:44:08 GMT

Did you test 20 times and it failed 20 times, or did it fail 1 out of 20 times? Are you using any other pstorage operations that are working? That pstorage_update() or cmd_queue_enqueue() returns NRF_SUCCESS only means that the pstorage software accepted your command. It doesn't mean that flash is actually updated.

You need to register a callback handler according to the documentation.

Then you will have to wait for the PSTORAGE_UPDATE_OP_CODE. This tells you that the update operation is completed, then you can go to System OFF.

RE: flash Read Exception

chad.ou — Sun, 03 Jan 2016 17:17:04 GMT

I have to check cmd_queue_enqueue this return NRF_SUCCESS. And judging by pstorage callback handler is complete.

RE: flash Read Exception

Susheel Nuguru — Sun, 03 Jan 2016 17:08:23 GMT

Before your system goes to system_off, does it check if the pstorage operation has completed? It should return the operation result as a system event. You have to wait for it before you go to system off.