Andy Green wrote:
About the 600sec thing, you can get the GPS chip to report 4 times a
second instead of once a second, maybe that can be to do with it. But
it is strange, noticing the heavy filtering on our results I wonder if a
lot of those samples coming so quickly were actually
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Somebody in the thread at some point said:
Thanks for your work Stacy.
| About the 600sec thing, you can get the GPS chip to report 4 times a
| second instead of once a second, maybe that can be to do with it. But
| it is strange, noticing the
Andy Green wrote:
| Has anyone
| figured out how to kick the GPS receiver into UBX mode? I would be
| curious to see if that changes anything.
It's actually documented by Ublox in here (Okular eats it)
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Somebody in the thread at some point said:
| One last thing, the voltage scaling and clock rate reduction patches
| aren't in the kernel you used, they should be around in tomorrow's
| packages: if you have 600 sec to spare it would be
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Somebody in the thread at some point said:
| After a reboot, it worked ok so its a false alarm - sorry!
Thanks for clearing it up.
- -Andy
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Le vendredi 01 août 2008, Andy Green a écrit :
opkg install kernel-module-g-ether kernel-module-cdc-ether
Having updated the kernel and everything, I get a FATAL error with that:
opkg install kernel-module-g-ether kernel-module-cdc-ether
Installing kernel-module-g-ether
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Somebody in the thread at some point said:
| Le vendredi 01 août 2008, Andy Green a écrit :
| opkg install kernel-module-g-ether kernel-module-cdc-ether
|
| Having updated the kernel and everything, I get a FATAL error with that:
|
| opkg install
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Somebody in the thread at some point said:
| and a negative - I moved the maps in tangoGPS from /tmp to the (orig
| freerunner) sdcard and it only works partially or not at all. This is
| offline usage. If I am online and I delete the map cache so
I did some testing today to add some more data points (or fuel on the
fire, depending on your point of view :-)
What I did was run three test, one with the SD card removed, one with
the SD card installed but idle and one with the SD card being used
heavily. For each test, I ran simultaneous
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| I did some testing today to add some more data points (or fuel on the
| fire, depending on your point of view :-)
Let's say you did nice work there enabling us to converge on an
understanding of the issue
One last thing, the voltage scaling and clock rate reduction patches
aren't in the kernel you used, they should be around in tomorrow's
packages: if you have 600 sec to spare it would be interesting to see if
they made any change :-)
- -Andy
Hi Andy,
To get that kernel you reference
After a reboot, it worked ok so its a false alarm - sorry!
BillK
On Thu, 2008-07-31 at 08:38 +0100, Andy Green wrote:
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Somebody in the thread at some point said:
| and a negative - I moved the maps in tangoGPS from /tmp to the (orig
|
(We have external LNA) It means it can track with a 16dBm reduction
in
GPS signal after it made the satellite acquisitions. So if you
understood it will get a fix OK with the software workaround, and we
saw
many people report this, you should expect the tracking phase to work
better
I would take this to mean that your current location drifts from the
actual spot to places not quite where you are standing.
Exactly. I will try to upload some logs (just discovered the /tmp
change in tangogps, grr.. some test data has been lost) in the next
few days that demonstrate this
2008/7/30 Jay Vaughan [EMAIL PROTECTED]:
Just sayin', not trying to stir the pot. I've been testing this GPS
fix every day since it arrived, by tracking my progress to work, and
if I zoom too closely (meaning there is more SD I/O on map refreshes)
the GPS goes wild.
Do you (all) have also
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Somebody in the thread at some point said:
| Just sayin', not trying to stir the pot. I've been testing this GPS
| fix every day since it arrived, by tracking my progress to work, and
| if I zoom too closely (meaning there is more SD I/O on map
On Jul 30, 2008, at 10:24 AM, Jay Vaughan wrote:
My ride to and from work is through a wide open space with no
obstructions, lots of blue sky, and for sure .. SD I/O still massively
impacts GPS *accuracy*. Not just in the acquisition phase, but also
tracking ..
That's strange. I didn't test
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Somebody in the thread at some point said:
| On Jul 30, 2008, at 10:24 AM, Jay Vaughan wrote:
| My ride to and from work is through a wide open space with no
| obstructions, lots of blue sky, and for sure .. SD I/O still massively
| impacts GPS
Jay Vaughan wrote:
(We have external LNA) It means it can track with a 16dBm reduction
in
GPS signal after it made the satellite acquisitions. So if you
understood it will get a fix OK with the software workaround, and we
saw
many people report this, you should expect the tracking
We're not done with what we can do to mitigate it in software. These
guys should be in tomorrow's kernel.
okay i'll continue testing and logging in the meantime ..
;
--
Jay Vaughan
___
Openmoko community mailing list
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Somebody in the thread at some point said:
| We're not done with what we can do to mitigate it in software. These
| guys should be in tomorrow's kernel.
|
|
| okay i'll continue testing and logging in the meantime ..
Great.
- -Andy
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| Track is very accurate (no jump-offs the road) in the city.
Earlier I
| used Garmin
| GPS60 and tracks from it were way worse than from FR.
|
| I used today's kernel and u-boot.
That's pretty encouraging, thanks.
Hi again,
I made another test, driving back home. This time, I zoomed
So, to me, GPS works great now. I had more problems with accuracy of
my Garmin outdoor device.
on todays drive home i also did a trace - and got wildly sporadic
results when tangogps had to read maps again off the disk .. i do not
have the latest kernel, however, as it doesn't appear to
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Somebody in the thread at some point said:
| I drove here almost 100km/h (but don't tell anyone) on max zoom, to
| read tiles faster from the card. As you can see, no jump offs from the
| road.
|
| So, to me, GPS works great now. I had more problems
and a negative - I moved the maps in tangoGPS from /tmp to the (orig
freerunner) sdcard and it only works partially or not at all. This is
offline usage. If I am online and I delete the map cache so tango
starts clean, it loads the maps fine - probably caches them in ram. If
I go offline to
Start with the software fix. It should slove the problem.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Annie
Sent: Sunday, July 20, 2008 3:01 AM
To: community@lists.openmoko.org
Subject: Warranty after fix for GTA02 GPS rework for SD card interference
From everything I've heard a software only fix will not be enough.
Unless you ditch your sd card as a data store.
All new FR's have the HW fix and new software will be written to take
advantage of that HW platform.
The software fix alone allows you to get a fast TTFF but after that, sd
card data
On Tue, Jul 29, 2008 at 12:11 PM, Scott Derrick [EMAIL PROTECTED] wrote:
From everything I've heard a software only fix will not be enough.
Unless you ditch your sd card as a data store.
All new FR's have the HW fix and new software will be written to take
advantage of that HW platform.
The
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Somebody in the thread at some point said:
| The software fix alone allows you to get a fast TTFF but after that, sd
| card data transfers are just to noisy to maintain a high quality GPS
| data stream. Yes it works but poorly, which is better than
On Tue, Jul 29, 2008 at 1:48 PM, Steven Kurylo [EMAIL PROTECTED] wrote:
On Tue, Jul 29, 2008 at 12:11 PM, Scott Derrick [EMAIL PROTECTED] wrote:
From everything I've heard a software only fix will not be enough.
Unless you ditch your sd card as a data store.
I haven't had any problems with
On Tue, Jul 29, 2008 at 1:24 PM, Mike Hodson [EMAIL PROTECTED] wrote:
On Tue, Jul 29, 2008 at 1:48 PM, Steven Kurylo [EMAIL PROTECTED] wrote:
On Tue, Jul 29, 2008 at 12:11 PM, Scott Derrick [EMAIL PROTECTED] wrote:
From everything I've heard a software only fix will not be enough.
Unless you
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