Hi,

I am trying to have NTP use the trimble resolution SMT gps module, I
have tried other trimble clock driver without success so I assume that
one specific to the module has to be used. Unfortunately there does not
seems to be any way to search the mailing list to see if this was
discuss before. I would appreciate if anyone with information could get
back to me.

I am trying to make this work on an embedded linux platform, I already
have the linuxpps driver installed and have the /dev/pps0 node
available. the module is wired to /dev/ttyS1. Using the clock driver for
the palisade lead to wrong answer format messages.

Regards

On 2010-05-04, Marc Leclerc <marc-leclerc@signaturealpha.com> wrote:

> I am trying to have NTP use the trimble resolution SMT gps module, I
> have tried other trimble clock driver without success so I assume that
> one specific to the module has to be used. Unfortunately there does
> not seems to be any way to search the mailing list to see if this was
> discuss before.

Try searching at
http://groups.google.com/group/comp.protocols.time.ntp/topics?lnk

or search Google for 

site:lists.ntp.org+questions+trimble+...

-- 
Steve Kostecke <kostecke@ntp.org>
NTP Public Services Project - http://support.ntp.org/

In article <4BE025AA.4050804@signaturealpha.com>,
 Marc Leclerc <marc-leclerc@signaturealpha.com> writes:

>I am trying to have NTP use the trimble resolution SMT gps module, I
>have tried other trimble clock driver without success so I assume that
>one specific to the module has to be used. Unfortunately there does not
>seems to be any way to search the mailing list to see if this was
>discuss before. I would appreciate if anyone with information could get
>back to me.

>I am trying to make this work on an embedded linux platform, I already
>have the linuxpps driver installed and have the /dev/pps0 node
>available. the module is wired to /dev/ttyS1. Using the clock driver for
>the palisade lead to wrong answer format messages.

The Palisade driver supports several different variations of
Trimble products.  Which one(s) did you try?

The data sheet says it speaks TISP and NMEA.  I don't know which
one is the default.  You might try running some helper code 
before starting ntpd to switch it to NMEA mode, and then telling
ntpd that it's a NMEA device.

-- 
These are my opinions, not necessarily my employer's.  I hate spam.

On 2010-05-05, Hal Murray <hal-usenet@ip-64-139-1-69.sjc.megapath.net> wrote:
> In article <4BE025AA.4050804@signaturealpha.com>,
>  Marc Leclerc <marc-leclerc@signaturealpha.com> writes:
>
>>I am trying to have NTP use the trimble resolution SMT gps module, I
>>have tried other trimble clock driver without success so I assume that
>>one specific to the module has to be used. Unfortunately there does not
>>seems to be any way to search the mailing list to see if this was
>>discuss before. I would appreciate if anyone with information could get
>>back to me.
>
>>I am trying to make this work on an embedded linux platform, I already
>>have the linuxpps driver installed and have the /dev/pps0 node
>>available. the module is wired to /dev/ttyS1. Using the clock driver for
>>the palisade lead to wrong answer format messages.
>
> The Palisade driver supports several different variations of
> Trimble products.  Which one(s) did you try?
>
> The data sheet says it speaks TISP and NMEA.  I don't know which
> one is the default.  You might try running some helper code 
> before starting ntpd to switch it to NMEA mode, and then telling
> ntpd that it's a NMEA device.
>
There might be some issues with your serial port connection to the
receiver.  You might want to pipe the serial I/O to your console and
monitor what is being sent and received from the serial port.  I have used a
Trimble Thunderbolt for NTP and it also uses the TSIP protocol.  The
Palasades driver worked for me, but I had issues with getting the
Thunderbolt to serve the time after a NTP poll instead of whenever it
chose.  My receiver came with a RS-232 interface, but a lot of Trimble
OEM products are RS-422 single ended and require a converter to RS-232
standard serial port.

Since your clock is supposed to understand TSIP, there might be a
program from Trimble that lets you talk directly to your clock to make
sure that it is operational, has a valid position and your serial level
converter is working.  If your module does not have a diagnostic
utility, you may try the one for the Thunderbolt.  The Trimble website
has these utilities.

Tom


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In article <4BE025AA.4050804@signaturealpha.com>,
	Marc Leclerc <marc-leclerc@signaturealpha.com> writes:
> I am trying to have NTP use the trimble resolution SMT gps module, I
> have tried other trimble clock driver without success so I assume that
> one specific to the module has to be used. Unfortunately there does not
> seems to be any way to search the mailing list to see if this was
> discuss before. I would appreciate if anyone with information could get
> back to me.

I've just released a patch to RIPENCC driver (43).
Maybe it can help you.
http://wiki.enneenne.com/index.php/LinuxPPS_NTPD_support

Gabor