Re: Re: [Paparazzi-devel] alternative u-blox GPS: LEA-6H? NEO-6H?

[Chris Gough]

Like the non-flash versions of the LEA-6 (e.g. 6S, which looks
otherwise like a 6H on cursory reading) the NEO-6 data sheets claims
all variants have Max Navigation Update rate of 5Hz (and they are all
configured in ROM / at boot-time, like the 6S). I don't understand how
configuration storage would effect navigation update rates, there must
be other differences that I haven't discovered yet.

The GPS page in the wiki says "Any of the LEA-4 and LEA-5 series
receivers can be used including the less expensive LEA-4A, 4S, 5A and
5S models as the special boot configuration code required for these
models is already written." Where is this code and how do I use it?

Given availability problems with LEA-4H and LEA-5H, and navigation
update rate problems with LEA-6H, would it be worth thinking about a
GPS that loads configuration from EEPROM instead (and uses one of the
5 Hz, non-flash u-blox variants)?

Chris Gough

On Mon, Feb 14, 2011 at 7:49 PM, Martin Mueller <address@hidden> wrote:
> Hi,
>
> the issue with u-blox is that they seem to reduce the update rate as they are 
> implementing new features (e.g. Galileo). The LEA-4H can run safely at 5Hz 
> (Mikrokopter does that) whereas the LEA-5 can only run at 4Hz in software 
> v5.00 or not even safely with 2Hz for the v6.02
>
> http://www.u-blox.com/de/firmware/gps-modules-firmware/u-blox-5-firmware.html
>
> The LEA-6 release notes talk about a non-guaranteed 5Hz option for non-flash 
> devices, anyone tried that?
>
> http://www.u-blox.com/de/firmware/gps-modules-firmware/u-blox-6-firmware-update.html
>
> Martin
>
> ----- original Nachricht --------
>
> Betreff: Re: [Paparazzi-devel] alternative u-blox GPS: LEA-6H? NEO-6H?
> Gesendet: Mo, 14. Feb 2011
> Von: Felix Ruess
>
> It's likely that you don't need to downgrade the firmware. As long as the few 
> NAV messages we use are still the same (very likely) you can use any ublox 
> GPS. The difference between the 4P and 5H is only that the 4P also provided a 
> UTM message, newer ones don't anymore.
>
> Cheers, Felix
>
> On Mon, Feb 14, 2011 at 5:17 AM, Michael Weigand <address@hidden> wrote:
> Is is possible to flash the 6H with v5 firmware? If so then the 6H should be 
> a drop in replacement for the 5H.
>
> -Mike
>
> On Sun, Feb 13, 2011 at 9:26 PM, Chris Gough <address@hidden> wrote:
> Hi,
>
> Has anyone used a u-blox LEA-6H in place of the LEA-5H? What about the
> smaller NEO series (e.g. NEO-6H)?
>
> It seems the 5H is obsolete, but 6H might be available in both
> formats. With a quick look at the specs they seem very similar
> (perhaps even better for flying in canyons :)
>
> Chris Gough
> --
> .
>
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>
>
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>
>
>
>
> --- original Nachricht Ende ----
>
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>
>



-- 
.