[sigrok-devel] Using protocol analyzers

[Richard A. S. <ri...@la...>]

I've recently purchased a OLS and now I'm trying to do some things with it.

Current goals are to decode PS/2 protocol streams and SD/SDIO 
communication streams [1].

Since here at OLPC we like hacking on python over java we want to try 
and use sigrok if possible to implement the analyzers.

I've got the latest HEAD built and I can sample data from the OLS.
My first attempt to run some data through the transitioncounter however, 
gave me confusing output.

When I run a small capture on a single channel and specify '-a 
transitioncounter' the analyzer seems to run _before_ the capture 
happens. ie I get transition analysis at the same time the LED moves to 
armed.  Then when I trigger I get my sampled output.

Since thats not a very useful order of operations I must be missing 
something on how to use a protocol analyzer.  Example usage or a RTFM 
pointer to where on the wiki that sort of thing is described would be 
appreciated.

Also the wiki claims that RLE mode is supported but currently unused. 
Whats necessary to turn that into "used"?

[1] SD clock is 50Mhz so to do SD we probably will have to get 200Mhz 
mode working first.

-- 
Richard A. Smith  <ri...@la...>
One Laptop per Child