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Re: [gpsd-users] Telit SE868-V3

From: Gary E. Miller
Subject: Re: [gpsd-users] Telit SE868-V3
Date: Fri, 24 Mar 2017 13:19:13 -0700

Yo Martin!

On Fri, 24 Mar 2017 20:09:38 +0000
Martin Townsend <address@hidden> wrote:

> > All you need is the NMEA.  When you have the GPS talking to gpsd we
> > can see is the binary has any advantage.  
> NMEA would probably do so I'll use this, does it use this by default?

gpsd autodetects the GPS speed and protocol.  Usually.  So let it try
to do that first.  If that fails there are ways to foce the GPS and gpsd
into desired modes.

> > Now you are out of our area of expertise.  SPI is very common with
> > RasPi's, BBB's, etc.  I'm guessing you can find a goold SPI->UART
> > solution for you easily.  
> I haven't found any SPI->UART kernel drivers only for actual SPI->UART
> chips like the max3100.  I have no problems writing one but I see that
> you have some sort of driver model within gpsd, would it be possible
> to use this to make gpsd use spidev?

No need to touch gpsd.  Just give it a device that looks like a standard
UNIX character device.

There are a lot of SPI devices, there must be some drivers for it, but
not something we get involved with here.

If you need to do bit picking, then best to write a shim that reads
your SPI and serves a /dev/ttyXXX

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

            Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin

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