[LinuxPPS] : Re: [Bug 610] Generic NMEA GPS Receiver driver w/PPS expects PPS after NMEA data (Udo van den Heuvel)

[Rodolfo Giometti]

On Wed, Oct 31, 2007 at 09:30:08AM +1100, Cirilo Bernardo wrote:
>    > Ok, thanks. So I put this in /etc/udev/rules.d/pps.rules.
>    > How can I test this besides by rebooting?
> 
>    1. unload the module for the PPS source
>    2. unload the linuxpps module
>    3. remove your symlinks
>    4. kill -SIGHUP `pidof udevd`
>    5. load the linuxpps module
>    6. load the module for the PPS source
> 
>    > And how can I make a simple rule that will *only* make a
>    > /dev/gps0 -> /dev/ttyS0 because we have a GPS on that port?
>    > Of course I can add a link to /etc/udev/devices but what would
>    > be the udev rules method?
> 
>    I can't answer that one because I don't know how to tell if there
>    is a GPS on ttyS0. You can schedule a script by using the
>    RUN= parameter in udev, but it is the script that will need to
>    determine if ttyS0 is a GPS and create the link using 'ln -s'.

I think this is not realistic at all. You are trying to solve a very
hard problem. Serial ports are not USB ones, the user must provide
some informations to the system (think about ISA and PCI boards :).

Ciao,

Rodolfo

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