Re: 8xx SCC and SMC uart latency

In message [ref] you wrote:

The idea is that your processing task waits on a semaphore: when someone
has something for it to do, they release (post/signal) the semaphore which
unblocks the processing task.  This allows the processing task to (a) not
consume processor resources when it doesn't have anything to do and (b)
start up immediately when there is something to do (as opposed to having to
wait for its slice of processor time).

Since serial and network I/O are involved, the "semaphore"  might  be
as simple as a select(), of course.

But that does not fix any scheduling latencies.

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
Work 8 hours, sleep 8 hours; but not the same 8 hours.

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