What does PSTORAGE_LOAD_OP_CODE mean?

Question

What exactly does the PSTORAGE_LOAD_OP_CODE (0x03) mean? The documentation says ( online ) that it is an "Error when Load Operation was requested". 
 The code is pretty straightforward: storage.cpp 
 Is there something specific to the S130 device that it doesn't work perhaps? This is my pstorage_platform.h file. 
 If I can debug this somehow, that would be great!

David Robins · Accepted Answer

When you call pstorage_register , you provide a callback function. This function is invoked when storage operations complete (see pstorage_ntf_cb_t in pstorage.h). The various OP_CODE macro constants, including PSTORAGE_LOAD_OP_CODE , are passed back in the op_code (second) parameter to your callback. Saying it's an "Error" is a bit confusing, since it's just the type of operation that completed, and you get the call back on success too; the result (third) callback parameter holds the error code and it will be NRF_SUCCESS on success. 
 pstorage_load is somewhat of a special case among the storage operations in that it isn't put into the operation queue like stores and erases are; instead under the covers it's just a memcpy and it always succeeds. It's useful to know this in case you were relying on queuing for ordering. For example, if you: 
 
 Erase memory at, say, 0x3FC00 to 0x3FFFF. 
 Write "ABCD" at 0x3FC00. 
 Read back memory at 0x3FC00 with pstorage_load , 
 
 then it's likely that your pstorage_load will return before your write has completed, returning old data. 
 On edit: Having taken a look at your code, (1) your callback should check for result != NRF_SUCCESS before alerting on an error, and (2) note that pstorage_store expects the given data buffer to persist until you get a callback; from pstorage.h: 
 * @warning No copy of the data is made, and hence memory provided for data source to be written
 * to flash cannot be freed or reused by the application until this procedure
 * is complete. End of this procedure is notified to the application using the
 * notification callback registered by the application.
 
 Your test variable will of course go out of scope when you return from the init function.

What does PSTORAGE_LOAD_OP_CODE mean?

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