Date: Thu, 19 Oct 2000 18:17:07 +0200 From: Alexander Maret <maret@atrada.net> To: "'andrew@ugh.net.au '" <andrew@ugh.net.au> Cc: "'freebsd-hackers@freebsd.org'" <freebsd-hackers@freebsd.org> Subject: RE: How to sense DCD on serial port? Message-ID: <58A002A02C5ED311812E0050044517F00D260A@erlangen01.atrada.de>
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>-----Original Message----- >From: andrew@ugh.net.au >To: Alexander Maret >Cc: 'freebsd-hackers@freebsd.org' >Sent: 19.10.00 15:30 >Subject: Re: How to sense DCD on serial port? > > > >> How can I sense the state of the DCD line that quick? I > >I'm not sure how quick it is but have you tried ioctl with an argument >of >TIOCMGET? See tty(4) for more details. Thanks for your answer. I meanwhile tried TIOCMGET and I can sense the state of dcd. Unfortunately I can't continously check DCD because this takes ernormous cpu time. Is there a possibility to get a signal,intr or whatever, whenever the state of DCD changes? If not, what could you think of I have to do to implement such a feature? Alex To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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