Re: reliable rs-232
Thank you very much for all your advices. The device I'm going to 'talk to' is cesium clock with rs-232 interface. So it is not possible to simply change the interface to differential one. Connection cable can be short and the transmission speed can be slow. The most important thing for me is to ensure the long term communication. Not to lose any data is very important when periodically monitoring cesium parameters. We are speaking here about months and years of continous operation. That is why I'm afraid of something 'strange' happens to my rs-232 interface and communication. Maybe I'm too afraid of strange magic, but still, is it possible that my rs-232 could change its transmission parameters as a result of e.g. nearby elecrical interference ? Or, in general, what bad thing could happen to me in such scenario. Thanks a lot, Greg ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
reliable rs-232
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 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
