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SubjectRe: How to avoid serial port buffer overruns?
Raphael Hertzog wrote:
> (Please CC me when replying)
>
> Hello,
>
> While using Linux on low-end (semi-embedded) hardware (386 SX 40Mhz, 8Mb
> RAM), I discovered that Linux on that machine would suffer from serial
> port buffer overruns quite easily if I use a baudrate high enough (I start
> loosing bytes at >19200 bauds and I would like to make it reliable up to
> 115 kbauds). I check if overruns are happening with
> /proc/tty/driver/serial ("oe" field).

What kind of serial port are you using? If it's an unbuffered 8250-type
port, it will NEVER be reliable at higher baud rates. You want a 16550
(or better) port.

--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/

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