Our application now requires us to timestamp I/O events with
millisecond accuracy, and be able to sync the RTC with an external
source. Because the RTC can be changed, we can no longer rely on the
SEC_TIMER variable to be in sync with the RTC. This also means that
the TICK_TIMER can no longer be used for our milliseconds, as the
clock will no longer be accurate after reboot. We are going to need
to read/write the RTC directly with millisecond accuracy.

I've heard mention that a few people here have written routines to
access and write to the the lower 2 bytes of the RTC. I'm scared of
Rabbit assembler, so I'm having some issues figuring out how to extend
the read_rtc() function myself. Would some kind soul be willing to
provide me with these methods?

Thanks in advance,

Loren Keagle

P.S. I'm considering the other solution of storing a millisecond
offset in flash, and reading it on startup. I know it's been done
this way before, but it just seems like such a waste when a 48 bit RTC
is sitting right there for me to use!
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