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SubjectRe: Timing serial events precisely.
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> To do this, I need to get a series of bytes/overruns/parity errors/...
> from the serial port, with accurate timing (to within 10us or so, if
> possible)
> AIUI, a userspace solution is impossible.

I would believe you are correct.

> I suspect something heavily borrowing from the serial driver, which
> instead of returning bytes, returned arrays of timestamps+events.

Maybe. You might actually want to bitbang the hardware and also look at
using RTLinux for it. I dont think its going to be trivial


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