Messages in this thread | | | Date | Fri, 23 Mar 2001 15:43:44 +0100 | From | Geir Thomassen <> | Subject | Re: Serial port latency |
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Problem solved !
The main problem was that I didn't know that the equipment used DTR as character acknowledge (not RTS/CTS which is common for flow control). I didn't even bother to look at those lines with the oscilloscope. Now the software runs fine with negligible latency.
Now the total latency is so low that the low_latency option to setserial really matters, it reduces the total run time of my program with 38 %
I don't get any measurable speed improvement by forcing the UART to be detected as a 8250 or a 16450 though.
I have not tested with HZ=1000.
All in all, my problem is solved, thank you all.
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