Hi Bjørn,

On Wed, Mar 06, 2013 at 10:43:27AM +0100, Bjørn Mork wrote:
> Forest Bond <[email protected]> writes:
> > On Tue, Mar 05, 2013 at 10:45:15PM +0100, Bjørn Mork wrote:
> >> Forest Bond <[email protected]> writes:
> >> 
> >> > Anyway, I notice that one of the ports appears to be QCDM.  It appears 
> >> > that QCDM
> >> > support is partially implemented in oFono?  But I don't know QCDM at 
> >> > all.  Can
> >> > we use it to do netreg?
> >> 
> >> What kind of Sierra device is this?  And what vid is it using?
> >
> > Well, I'm really after a few devices:
> >
> > * Sierra Wireless USB 598 (Sprint/Telus branded)
> > * Sierra Wireless MC5728V (Feeney Wireless Skyus 3G)
> >
> > The 598 has VID 0025.  I think the Skyus 3G does, too (at least in some
> > configurations), but I don't have one in front of me to check.  In any case 
> > it
> > is a very similar part to the 598.  All I have to test with right now is a 
> > Telus
> > demo device (with no service :/) as my other parts were returned to their
> > respective owners some time ago.
> >
> >> I ask because I have only seen QCDM ports active on Sierra devices
> >> in firmware modes with rmnet/qmi_wwan interfaces.  In which case you
> >> should have QMI support.
> >
> > I couldn't get qmicli to do anything with any of the ports, but test-qcdm 
> > (from
> > the ModemManager source tree) seems to like talking to the last port.
> >
> >> > If not, I could probably implement (partial) CnS support at some point.  
> >> > I'm
> >> > just not sure I will have time to do it right away.
> >> 
> >> And those modes do not have any CnS ports.
> >
> > These parts definitely have CnS ports.  We've used CnS for an unrelated 
> > project
> > with all of these devices.
> >
> > In all, I think the ports are as follows:
> >
> > 1. AT commands
> > 2. CnS
> > 3. NMEA 0183 (GPS)
> > 4. QCDM
> >
> > WRT #3, I remember seeing what looked like NMEA a while back using a Sprint
> > part.  WRT #4 I've only ever tested the Telus part.
> >
> > What do you think?
> 
> Thanks.  I think you are right.  Learning something new every day.
> Until know I thought they had a clear split between "Qualcomm" and
> "Sierra" protocols, but these devices obviously do a mix.  Is the NMEA
> port Sierra style (enabled using the SetNmea control message) or
> Qualcomm style (enabled by writing "$GPS_START" to the port)?

Sierra style.  Passing nmea=1 to the sierra kernel module enables it.

Thanks,
Forest
-- 
Forest Bond
http://www.alittletooquiet.net
http://www.rapidrollout.com

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