From: Steven A. F. <sa...@op...> - 2007-02-03 17:07:55
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I'm afraid I do not run gpsd, so I cannot answer your question. I use ntpd to read the ublox in NMEA mode. I also patched the kernel to add pulse-per-second capability to the pxa serial driver. In my implementation, the PPS output of the ublox is wired to the pw1 GPIO. I've configured that GPIO as an interrupt, which is what the pxa serial kernel driver uses to report PPS events to ntpd. My other machines then query the ntpd server running on the gumstix to obtain time-of-day information. Steve |
From: Andrei R. <po...@gm...> - 2007-02-03 17:51:34
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Thanks, Steve. I'll figure gpsd. How much of a change is this PPS stuff ? Can you send a diff file ? -Andrei. On 2/3/07, Steven A. Falco <sa...@op...> wrote: > I'm afraid I do not run gpsd, so I cannot answer your question. I use > ntpd to read the ublox in NMEA mode. I also patched the kernel to add > pulse-per-second capability to the pxa serial driver. In my > implementation, the PPS output of the ublox is wired to the pw1 GPIO. > I've configured that GPIO as an interrupt, which is what the pxa serial > kernel driver uses to report PPS events to ntpd. > > My other machines then query the ntpd server running on the gumstix to > obtain time-of-day information. > > Steve |
From: Steven A. F. <sa...@op...> - 2007-02-04 03:50:34
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I've sent Andrei the patch privately, because I am unsure of the etiquette of posting a 50kbyte patch to the list. What is the proper procedure for posting patches? Is there some sort of repository for them? Steve Andrei Rylin wrote: > Thanks, Steve. > I'll figure gpsd. > How much of a change is this PPS stuff ? > Can you send a diff file ? > -Andrei. > > On 2/3/07, Steven A. Falco <sa...@op...> wrote: > >> I'm afraid I do not run gpsd, so I cannot answer your question. I use >> ntpd to read the ublox in NMEA mode. I also patched the kernel to add >> pulse-per-second capability to the pxa serial driver. In my >> implementation, the PPS output of the ublox is wired to the pw1 GPIO. >> I've configured that GPIO as an interrupt, which is what the pxa serial >> kernel driver uses to report PPS events to ntpd. >> >> My other machines then query the ntpd server running on the gumstix to >> obtain time-of-day information. >> >> Steve >> > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job easier. > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > |
From: Dave H. <dhy...@gm...> - 2007-02-04 03:55:07
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Hi Steve, On 2/3/07, Steven A. Falco <sa...@op...> wrote: > I've sent Andrei the patch privately, because I am unsure of the etiquette > of posting a 50kbyte patch to the list. What is the proper procedure for > posting patches? Is there some sort of repository for them? If you'd like, I'd be happy to throw it on my web server and then we can post a link to it. If Craig wants to incorporate it into buildroot, then he can choose to do so. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |
From: Craig H. <cr...@gu...> - 2007-02-04 04:25:25
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On Feb 3, 2007, at 9:07 AM, Steven A. Falco wrote: > In my > implementation, the PPS output of the ublox is wired to the pw1 GPIO. > I've configured that GPIO as an interrupt, which is what the pxa > serial > kernel driver uses to report PPS events to ntpd. Sounds like a perfect application to test the RT stuff I just pushed into the buildroot! How about cranking the priority on the PPS response ISR, and see if your jitter gets pushed even lower! C |
From: Steven A. F. <sa...@op...> - 2007-02-04 21:12:00
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An interesting idea. I'll see if it makes an improvement. Steve Craig Hughes wrote: > On Feb 3, 2007, at 9:07 AM, Steven A. Falco wrote: > > >> In my >> implementation, the PPS output of the ublox is wired to the pw1 GPIO. >> I've configured that GPIO as an interrupt, which is what the pxa >> serial >> kernel driver uses to report PPS events to ntpd. >> > > Sounds like a perfect application to test the RT stuff I just pushed > into the buildroot! How about cranking the priority on the PPS > response ISR, and see if your jitter gets pushed even lower! > > C > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job easier. > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > |
From: Craig H. <cr...@gu...> - 2007-02-04 23:55:34
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On Feb 4, 2007, at 1:11 PM, Steven A. Falco wrote: > An interesting idea. I'll see if it makes an improvement. Mostly, I'm just looking for someone to test the RT stuff ;) C |