Date: Fri, 27 Oct 2000 15:02:10 +0200 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: Alexander Maret <maret@atrada.net> Cc: "'freebsd-hackers@freebsd.org'" <freebsd-hackers@FreeBSD.ORG> Subject: Re: AW: Accessing the tty structure of an opened device Message-ID: <10498.972651730@critter> In-Reply-To: Your message of "Fri, 27 Oct 2000 14:59:41 %2B0200." <58A002A02C5ED311812E0050044517F00D2612@erlangen01.atrada.de>
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In message <58A002A02C5ED311812E0050044517F00D2612@erlangen01.atrada.de>, Alexa nder Maret writes: >> From: Poul-Henning Kamp [mailto:phk@critter.freebsd.dk] >> Subject: Re: Accessing the tty structure of an opened device >> >> >> >is it possible to access the tty structure of an opened >> >device directly? >> > >> >Background: >> >I'm trying to sense the DCD state of a serial port for >> >getting the pulses and spaces of a simple IR device. >> >> We have some ioctls which allow you to do that, some of them work. >> >> Look in <sys/ttycom.h>, I belive I have used TIOCMODG() at one >> point in time. > >Thanks for your answer but unfortunately you misunderstood my >intention (probably because of my bad english). >I already saw that I can get the state of the DCD line via >ioctl(). But to really get all pulses and spaces of the IR >device I would have to check DCD continously. What I need >is something to get a signal/intr/wakeup as soon as dcd changes. How fast do these pulses arrive ? Consider using the PPS-API for that: <sys/timepps.h> -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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