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Welcome to NavSpark Community, a friendly social site for NavSpark GPS/GNSS enthusiasts. If you have some related GPS/GNSS questions or interesting applications to share, this is the place to come !

NavSpark started as an Indiegogo campaign: http://goo.gl/F4WSfn

To download NavSpark Arduino IDE tools & documents, click Store/Resources, then RESOURCES

Blog

Why Is Speed Noisy at Higher Update Rate ?

SkyTraq's GPS/GNSS has fastest update rate in the low-cost consumer/industrial segment.

GPS modules has 50Hz maximum update rate.

NavSpark has 10Hz maximum update rate, reserving enough throughput for application development. Firmware at bottom of NavSpark product page on the web-store also supports 50Hz maximum update rate for NavSpark, 20Hz for NavSpark-BD and NavSpark-GL.

Often users want to use highest update rate regardless of application, and sometimes this gives…

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More NS-T Programmable Frequency Testing

Although NS-T generated frequency lock accuracy is better than 10^-11, there is phase jitter. This experiment tries to clean up phase jitter with $2 PLL : http://www.digikey.com/product-detail/en/PI6C4511WE/PI6C4511WE-ND/1305452. PLL used has output minimum of 2X input frequency, so 10MHz input will have 20MHz output, 19.2MHz input will have 38.4MHz output. Jumping wire to…

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Forum

NavSpark Interrupt Issue

I am using a waveform generator to send pulses to a NavSpark-GL, to trigger interrupts. Why do I need a pulse of >25 microseconds in duration for the interrupt to be serviced reliably? Shorter pulses lead to intermittent behavior. All of this leads to the following four questions: Why is my edge triggered interrupt sensitive to pulse length? Is there a specification for interrupt pins? Which pins support interrupts? Does the GNSS code disable interrupts for a long time? My program: Interrupt…

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2 Replies · Reply by John Moore 4 hours ago

Activity

John Moore replied to John Moore's discussion NavSpark Interrupt Issue
"Jason,
  Thank you for the quick and clear explanation."
4 hours ago
Jason Lin replied to John Moore's discussion NavSpark Interrupt Issue
"During design of Venus 8 chip, it only had typical GPS/GNSS chipset and module application in mind. So design of GPIO interrupt is a bit crude, all GPIO inputs are OR-ed together and sent to one of LEON3’s interrupt controller pin. Although interrup…"
13 hours ago
John Moore posted a discussion
I am using a waveform generator to send pulses to a NavSpark-GL, to trigger interrupts.Why do I need a pulse of >25 microseconds in duration for the interrupt to be serviced reliably? Shorter pulses lead to intermittent behavior.All of this leads to…
21 hours ago
julio menezes commented on Oliver Huang's blog post Tutorial : Using UART1
"I agree with John Moore.I am a GNU advocate. We have very good quality  open source software because of Linus law.  "given enough eyeballs, all bugs are shallow".Even with the recent bash bug, bash is much  much better than command.com.Same good dev…"
yesterday
John Moore commented on Oliver Huang's blog post Tutorial : Using UART1
"Agreed. NavSpark is a great thing!
But, it lacks a bit of the spirit of the maker movement. I think NavSpark could be a big deal and sell a huge number of devices, but only if it catches on in the maker world. This sort of thing (opening stuff up an…"
yesterday
Oliver Huang posted a blog post
SkyTraq's GPS/GNSS has fastest update rate in the low-cost consumer/industrial segment.
GPS modules has 50Hz maximum update rate.
NavSpark has 10Hz maximum update rate, reserving enough throughput for application development. Firmware at bottom of N…
Saturday
catur aries rokhmana commented on Oliver Huang's blog post NS-RAW Firmware Update with SD-Card Logging Feature
"This is still not clear for me
Is your NS-Raw only enough for GPS Phase data Logger or any others additional stuff  (SD-Card Logger, external Battery, antenna block, etc..)
I mean: Can we Use it without any laptop at the field ... Ok"
Thursday
catur aries rokhmana replied to Oliver Huang's discussion NS-RAW related topics in "NS-RAW" category
"This is still not clear for me
Is your NS-Raw only enough for GPS Phase data Logger or any others additional stuff  (SD-Card Logger, external Battery, antenna block, etc..)
I mean: Can we Use it without any laptop at the field ... Ok"
Thursday
catur aries rokhmana replied to Oliver Huang's discussion NS-RAW related topics in "NS-RAW" category
"This is still not clear for me
Is your NS-Raw only enough for GPS Phase data Logger or any others additional stuff  (SD-Card Logger, external Battery, antenna block, etc..)
I mean: Can we Use it without any laptop at the field ... Ok"
Thursday
Jason Lin replied to Oliver Huang's discussion NS-RAW related topics in "NS-RAW" category
"NS-RAW output carrier phase raw measurement.
Item 2 and 3 relies on the 3rd party software you use; we don't offer this software."
Thursday
catur aries rokhmana replied to Oliver Huang's discussion NS-RAW related topics in "NS-RAW" category
"Please inform me
if your NS is possible to to this:
1. I'll try to get Raw Phase data measurement (rover and base) then
2. Running a post processing GPS kinematic
3. Capable to get sub-meter accuracy

So, which is the best configuration
of your stuf…"
Thursday
catur aries rokhmana is now a member of NavSpark Community
Thursday
Mike Doty is now a member of NavSpark Community
Wednesday
John Moore replied to cdilla's discussion NavSpark project case
"Interesting. Have you found a heat build-up problem with this?"
Wednesday
John Moore replied to Bri3D's discussion Arduino for NavSpark on OSX
"Tks. I'm currently running it on Windows under VMWARE on OSX."
Wednesday
Jason Lin replied to Bri3D's discussion Arduino for NavSpark on OSX
"Sorry don't have support for these. Could run GNSS Viewer under Wine Windows emulator on Linux."
Wednesday
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