Re: [Gtkwave-users] Finding edges of specific signal in FST

[<by...@nc...>]

	Documentation outside of the fstapi.h header is pretty much in the
sourcecode: vcd2fst, fst2vcd, fstminer, and fst.c for gtkwave itself.
The usages are quite straightforward.

	rtlbrowse uses the value at time reading, but I don't recommend it if
you need to read a lot of data out of the FST file.

	For fstReaderIterBlocks, to modify specific signals to the list
iterated through, use 

	void fstReaderClrFacProcessMask(void *ctx, fstHandle facidx);
void fstReaderClrFacProcessMaskAll(void *ctx);
void fstReaderSetFacProcessMask(void *ctx, fstHandle facidx);void
fstReaderSetFacProcessMaskAll(void *ctx);

	These modify the time range for the callback iterator, but only at
the block level. You'll still have to ensure that your times are
within range. 

	void fstReaderSetLimitTimeRange(void *ctx, uint64_t start_time,
uint64_t end_time);
void fstReaderSetUnlimitedTimeRange(void *ctx);

	-Tony

	-----------------------------------------From: "Roman Popov" 
To: gtk...@li...
Cc: 
Sent: Thursday March 5 2020 7:03:31PM
Subject: [Gtkwave-users] Finding edges of specific signal in FST

Hi all,Is there any documentation for FST API?

I need to find edges for specific signals in FST. What is the best way
to do it?I'm looking into fstapi.h, looks like there are two ways to
read signal values:
- fstReaderGetValueFromHandleAtTime
I guess this one returns value at specific time, but how can I find
time where value changed?
- fstReaderIterBlocks
This one seem to be an iterator over all value changes for all signals
in waveform?
Is there a way to restrict iteration for specific signals?Is there a
way to start iteration from specific point in time?
Thanks,Roman