R. Steve McKown wrote:
On Thursday 12 October 2006 03:10 pm, Sean Casey wrote:
Hello,
I've read that when writing to Flash, nothing is final until sync is
called. Does this imply that everything written thus far using
fastappend (or any other writing function) is stored in memory? Meaning
sync must be called before you run out of memory?
At least for components like LogStorage in TinyOS-2.x, the data are written
synchronously to flash. However, due to metadata issues, the last bit of
flash written may not be accessible until you issue sync(), which ensures
that the metadata necessary to access that last bit has been written.
Note that 'bit' is not a literal bit, but some implementation dependent amount
of data. Also note that issuing sync() may waste some flash. TEP 103,
available form www.tinyos.net, describes the state of flash components in
TinyOS-2.x pretty well; you should check it out.
Steve
Hi Steve,
Thanks for your reply. Unfortunately, I'm using TinyOS-1.x still. Do
you know of any other TEPs (or other documents) that describe the flash
components for TinyOS-1.x?
Thanks again for your reply.
- Sean
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