How to force word alignment for FDS?

[mokincha]

The FDS requires data to be word-aligned and multiple of the word size. How do I ensure that my source/destination data structures are properly sized/aligned?

E.g. I want to read and write a 13 byte data structure with the FDS. How to I make sure the structure in RAM is aligned on a word boundary and has 16 bytes (4 words) allocated?

I'm using SDK 12.2.

[pellepl]

Something like this?

struct {
  uint8_t foo;
  uint32_t bar;
  uint32_t baz;
  uint32_t bap;
} __ALIGN(4) to_be_persistenced;

Do note, that the 3 unspecified bytes may contain things from stack, so you might want to memset the structure before defining the values and then saving it.