Date: Sat, 10 Apr 2010 15:41:33 +0200 From: Grzegorz Daniluk <lin_g@o2.pl> To: freebsd-questions@freebsd.org Subject: reliable rs-232 Message-ID: <4BC0800D.9030407@o2.pl>
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Hi everybody, I have a question regarding rs-232 under FreeBSD. I need to write an application for FreeBSD to operate an industrial controller via rs-232. The trick is that it should have very good long term stability (reliably operation over years). It should be able to detect and correct (e.g by reconfiguration of rs-232 port parameters) when rs-232 hangs or changes its transmission parameters as a result of electrical interference/disturbances etc. First thought is to simply close and reopen rs-232 port every given time interval, so even if something 'strange' happens the failure would be fixed after finite time period. But maybe there is smarter way of doing that. Maybe some special fault-tolerant rs-232 kernel drivers ? Any help appreciated, maybe someone has other helpful advieces regarding reliable rs-232 programming ini general ? Thanks for all help and advices. Best regards, Greg
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