SDK15.2 fds write operation problem

RE: SDK15.2 fds write operation problem

Jray — Thu, 29 Nov 2018 10:57:09 GMT

Ok, Thanks Einar !

RE: SDK15.2 fds write operation problem

Einar Thorsrud — Thu, 29 Nov 2018 09:42:31 GMT

Hi,

The line I pasted from the documentation is unclear because it mixes words and bytes, and in fact it is not entirely correct either. In practice, the maximum number of words you can write is FDS_VIRTUAL_PAGE_SIZE - 6, which would be 2042 words in this case (8168 bytes). See this thread for details.

RE: SDK15.2 fds write operation problem

Jray — Thu, 29 Nov 2018 09:30:39 GMT

Hi Einar,

Thanks for your reply!

Do you mean that the maximum cannot exceed 2048*4-14 bytes? if FDS_VIRTUAL_PAGE_SIZE = 2048.

RE: SDK15.2 fds write operation problem

Einar Thorsrud — Thu, 29 Nov 2018 09:21:24 GMT

Hi,

You are attempting to write a larger record than allowed. From fds_record_write() API doc: "The length of the data must not exceed FDS_VIRTUAL_PAGE_SIZE words minus 14 bytes".