From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Leclerc Date: Wed, 13 Apr 2011 17:14:45 -0400 Subject: [Buildroot] Device creation In-Reply-To: <20110408165634.68ca542b@snot.conwin.com> References: <91E60E2EFEE04B0399DD86344DDEF380@VOSTROSYS> <20110407163451.6c00433c@snot.conwin.com> <62530A4FC0D74901A1AC9D2E6D3ADF17@VOSTROSYS> <20110408165634.68ca542b@snot.conwin.com> Message-ID: <4DA61245.40505@signaturealpha.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Seems I am kind of stuck on the setup instructions where i should try ldattach. buildroot only supports util-linux 2.13pre7 where as ldattach is only supplied starting at 2.14. any chance to have support for the latest in buildroot? Thanks On 2011-04-08 17:56, Bill Borton wrote: > You mean /sys/class/pps is empty? I would check to make sure > you have everything you need in your kernel. > > sysfs support? > pps support? > pps line discipline? (pps is connected to carrier detect. Correct?) > > Again, you will not have pps on ttyS1. It is physically connected to > DCD of your port but it will be it's own device. > > -Bill > > p.s. This is a kernel/linux-pps issue. There are better forums to > discuss this and a lot of info on-line... Pretty much everything you > need is in the link you provided in your first post. Read through it > again and play around a bit. > > > > On Fri, 8 Apr 2011 16:33:55 -0400 > "Marc Leclerc" wrote: >> Hi, >> >> Thanks for this info, it will prove usefull. I seem to have a problem with >> the kernel hooking up to my pps on ttyS1. >> >> on startup i do see PPS line dicipline registered but the folder >> /sys/stat/pps is empty. we have validated that the pps signal is pulsing at >> 9V >> >> Any clue why? >> >> Thanks again >> >> -----Original Message----- >> From: Bill Borton >> Sent: Thursday, April 07, 2011 5:34 PM >> To: buildroot at busybox.net >> Subject: Re: [Buildroot] Device creation >> >> On Thu, 7 Apr 2011 13:23:32 -0400 >> "Marc Leclerc" wrote: >>> Hi, I am trying to get linuxpps working on my board using ntp. there are >>> steps described at >>> http://wiki.enneenne.com/index.php/LinuxPPS_installation which says to >>> use ldattach to assign the pps signal but so it seem I do not have >>> ldattach on my buildroot system and tryin to compile util-linux led to >>> compilation errors. Just wondering if anyone here has the know how to >>> get my /dev/pps0 created and assigned to my /dev/ttyS1. the steps also >>> mentions using udev to get the /dev/pps0 created, i have tried installing >>> and >>> using it and it just messed up my other links >>> >>> Best regards >> /dev/pps0 is it's own device. Look in /sysfs/class/pps/pps0/dev (you did >> build >> support into your kernel, correct?) for the details and use mknod to create >> it: >> >> mknod -m 0664 /dev/pps0 c 252 0 >> >> >> If you are trying to bring up ntpd with the generic NMEA driver you will >> need to make a couple links to your ttyS1 and pps0: >> >> ln -s /dev/ttyS1 /dev/gps0 >> ln -s /dev/pps0 /dev/gpspps0 >> >> /dev/gps0 (ttyS1) has your nmea stream. >> /dev/gpspps0 (pps0) has your pps. >> >> -Bill >> _______________________________________________ >> buildroot mailing list >> buildroot at busybox.net >> http://lists.busybox.net/mailman/listinfo/buildroot > _______________________________________________ > buildroot mailing list > buildroot at busybox.net > http://lists.busybox.net/mailman/listinfo/buildroot > > >