On Tue, Apr 19, 2016 at 06:04:49PM +0000, Reizer, Eyal wrote:

Thanks! Glad the illustration helped.
I will try it out again as if i recall cotrectly, i did try that l, and it didnt produce the correct waveform, but perhaps i didnt understand the usage of .cs_change correctly.
Will double check anyway.

It could also be a bug in your controller driver, it's common for them
to not handle cs_change correctly (at least those that open code the
message loop, obviously modern ones just factor this out into the core).