Kristian Paul's Blog

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This is a simple blog relating to Debian & Free Software issues.

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Entries tagged "qi".

Hardware Al Reves
18th November 2010
Una breve entrada para postear algunos slides para una presentacion sofware el hardware copyleft y el dilema del hardware bloqueado.

Tags: copylet, electronics, fpga, free, qi, sofware, talks.
GPS-SDR on the Nanonote (Update)
23rd January 2011
~/mutt-micro-1000-21284-14666970874956765.html 
As some of you already know may be others not, there is an upcoming
effort [1] about implementing a GPS Device for the nanonote, _but_ in a
free/libre way.

As was already proved before you can attach [2] a
commercial non-free GPS device and find your position on a nice map,
but the idea is go further, so we want implement a sofware/hardware
method for processing I/Q signals coming from a SiGE SE4162T GPS
Receiver IC.

So far i got some "raw" data [3], it is basically the  4-bit I/Q
(2-bit I and 2-bit Q) from SiGE chip arranged [6] continuouslly.

Now with help from Fabrizio Tapper from CTAE, this data is about to be
processed in order to verify that the PRN codes [5] from the satellites
on sky view [4] could be tracked. Of course any aditional
help is wellcome :-).


[1] http://en.qi-hardware.com/wiki/GPS_Free_Stack
[2] http://en.qi-hardware.com/wiki/GPS
[3] http://downloads.qi-hardware.com/people/kristianpaul/sige_01_06_11_22-43_GMT-5.out.tar.gz
[4] http://downloads.qi-hardware.com/people/kristianpaul/gpredict_01_06_11_22-43_GMT-5.png
[5] http://downloads.qi-hardware.com/people/kristianpaul/sige_01_06_11_22-43_GMT-5.PRN
[6] http://projects.qi-hardware.com/index.php/p/ben-gps-sdr/source/tree/master/notes/data%20process
Tags: gps, nanonote, qi, radio, sdr.
GPS-SDR on the Milkymist (Update 2)
26th November 2011
~/blog/Untitled.html Has been a while since the last update in January, starting because for now
this implementation will no run in the nanonote :-) Not because it cant be do it,
just because i get more close to Milkymist platform so i feel more confident with it
(libre knowledge is my power) :-)

After read/skim some books/links [1][2] about GNSS/GPS and check Namuru proyect (thanks to Fabrizio)
i decided to port this namuru core to milkymist soc [3], this in beta stage and the current
effort  is around making and tunning the correlators to get a proper signal acquisition and tracking [4],
this is a software asisted task that will be acomplished by osgps, and thanks to Artyom from gnss-sdr [5] wich
ported this project to a simplified version [6], getting started will not be hard.

Still more code in osgps that could be ported to get a fix, but for now having and stable method to get
navigation data from the GPS satellites is the priority.

Thanks for reading !
And all qi-hardware/milkymist comunity for supporting me :-)


[1] http://en.qi-hardware.com/wiki/GPS_Free_Stack/Books
[2] http://en.qi-hardware.com/wiki/GPS_Free_Stack/Web_Links
[3] https://github.com/kristianpaul/milkymist/tree/gps-sdr-testing
[4] http://en.qi-hardware.com/wiki/GPS_Free_Stack/Notes_About_Namuru
[5] http://gnss-sdr.ru
[6] http://code.google.com/p/gnsssdr/source/browse/#svn/trunk/OSGPS_MOD
Tags: gnss, gps, milkymist, osgps, qi, radio, sdr.
Congreso Itinerante by Free Software Foundation de Ecuador
3rd April 2012
/tmp/mutt-micro-1000-16715-896461972901d8d8fb0.html I'm going to give a talk about Copyleft Hardware, by April 11 at
Instituto Superior de Pedagogía, not too much info yet, just in case you
are at Ecuador at that time may be of you interest.

More info coming at http://softwarelibre.info/ (Agenda)
Tags: copyleft, floss, hardware, qi, talk.

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