linux-kernel - Re: GPS drivers (was Re: [PATCH v2 0/9] Serial slave device bus)

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Message-ID: <1484928971.2133.273.camel@linux.intel.com>
Date:   Fri, 20 Jan 2017 18:16:11 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Pavel Machek <pavel@....cz>
Cc:     Rob Herring <robh@...nel.org>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Jiri Slaby <jslaby@...e.com>,
        Sebastian Reichel <sre@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        "Dr . H . Nikolaus Schaller" <hns@...delico.com>,
        Peter Hurley <peter@...leysoftware.com>,
        Alan Cox <gnomes@...rguk.ukuu.org.uk>,
        Loic Poulain <loic.poulain@...el.com>,
        NeilBrown <neil@...wn.name>,
        "linux-bluetooth@...r.kernel.org" <linux-bluetooth@...r.kernel.org>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: GPS drivers (was Re: [PATCH v2 0/9] Serial slave device bus)

On Fri, 2017-01-20 at 16:26 +0100, Linus Walleij wrote:

> > Now, NMEA knows about some of the complexity (not AGPS), but gets
> > the
> > details wrong. In particular, it would be good to have error
> > estimates
> > and velocities from the same moment you get position estimates.
> 
> NMEA if it is this:
> https://en.wikipedia.org/wiki/NMEA_0183
> 
> Seems to be a high-level format such as XML or CSV or any other
> $FAVOURITE_ASCII_TRANSPORT format.

Not exactly. It depends on device settings.
Old GPS I used to play with have AT command to switch between ASCII and
binary format. Some of the devices might use non-standard binary
protocols (however, representable as NMEA), etc.

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy