Reading flash with pstorage module

RE: Reading flash with pstorage module

genis — Fri, 27 Jan 2017 09:19:07 GMT

Ok thank you Petter. I am using the FDS library now. Indeed, when a record in FDS is oven via fds_record_open() a pointer to a memory position that maps to flash memory is return as record data. Thanks for your support.

RE: Reading flash with pstorage module

Petter Myhre — Wed, 25 Jan 2017 10:11:59 GMT

Yes, as far as I know.

RE: Reading flash with pstorage module

genis — Tue, 24 Jan 2017 16:50:06 GMT

Ok I was looking at the store operation instead of the update operation in pstorage. It looks like the update operation does copy block contents in a swap area.

Anyway, should I be able to read from flash memory as it was from RAM memory? That is, given a pointer to a region that maps to flash, could I read from where it points to, as with any other regular pointer?

RE: Reading flash with pstorage module

Petter Myhre — Tue, 24 Jan 2017 14:39:39 GMT

I don't think it is strictly necessary, have you tried?

If you want to update, you can use pstorage_update().

When using the update routine, the Persistent Storage Manager will use a swap flash area to conserve the blocks not affected. The data page is backed up in the swap area before it is erased, then the non affected blocks are copied back before the updated block is stored.