Re: [gpsd-users] syslog error message with new version - kernel PPS failed Connection timed out

[Gary E. Miller]

Yo hans!

On Thu, 06 Aug 2015 22:16:13 +0200
hans mayer <address@hidden> wrote:

>  > OK.  Be aware that driver can only use one edge...
> 
> I know. Actually it didn't work on a Banana PI at all.
> With Bananian Linux! version: 15.04 - kernel 3.4.108+
> It only worked on Raspberry PI.
> I had to add this patch  https://github.com/infinet/bananapi
> And I do not know how to use the other edge - and how ?
> I don't need it.
> So it's not an issue for me (currently).

That patch is for kernel 3.4.  Get a newer kernel, which already has the patch.

>  > Yes, because you have not told gpsd how to access the /dev/pps0,
> How can I ?

Details are in gpsd time service howto.

>  > How are you starting gpsd?
> /usr/local/sbin/gpsd -n -F /var/run/gpsd.sock -P /var/run/gpsd.pid 
> /dev/ttyS2

add /dev/pps0 to the end of that.  Then gpsd opens it.

>  > You are starting gpsd as root, right?
> Yes, of course.

Good.

>  > What are the permissions on your /dev/pps0?
> 
> Original - after a boot - it is this:
> crw------- 1 root root    242, 0 Aug  6 14:09 /dev/pps0
> and I also changed group and permissions
> crw-rw---- 1 root dialout 242, 0 Aug  6 14:09 /dev/pps0
> no change in the behaviour

Since you are starting as root, and you did not have /dev/pps0 on your
command line, neither would work.  And when in doulbe just make it
666 for testing.  That eliminates a lot of confusion.

> I started gpsd in debug mode
> /usr/local/sbin/gpsd -n -N -F /var/run/gpsd.sock -D 4 /dev/ttyS2
> I do not know why I hadn't this idea earlier. :-(
> 
> And I have seen it creates it's own /dev/pps1

Of course, attached to /dedv/ttyS2, which is not what you want
because your PPS is no on ttyS2 but on the gpio.

> Of course it runs into a time-out if it does not use the one
> provided from the system.
> Attached the debug trace of some seconds running gpsd with -D 5.
> This rises the question why is it creating pps1 instead
> of using pps0 ?

Because any sane hardware does not use GPIO for things that are
related to the serial port.

>  > You can not have followed the time service howto and used
>  > rpi_gpio_ntp at the same time.
> 
> You are completely right.
> But you can imagine I walked a stony way. As I said:

Keep reading it, you keep mising things that are in there.

>  >> And I run the NTP configuration you mentioned in this doc.
> Because of the fact that gpsd is currently not doing as I expect

Nor will gpsd do as you expect going the way you are going.

> I was happy to bring it up and running with "rpi_gpio_ntp"
> in the first attempt.

Yes, nice for testing, nothing more.

> But in any case. Your page is a big help if one carries together
> all these puzzle stones of a new big puzzle.

Oh, and you also read the Raspi section in the INSTALL file?

> I am looking forward to find a solution.

Do it by the gpsd doc, and it will work fine.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1(541)382-8588

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