Would it be possible for a beagleboard to be hooked up to the atlas without overloading the LPU with the other boards or causing signal interference? I've seen quotes somewhere that it uses 5v @ 500mA, but I'm having trouble figuring out where I read that now...<br>
<br><div class="gmail_quote">2010/11/22 Mike Luckham <span dir="ltr"><<a href="mailto:sunrise@sunsys.net">sunrise@sunsys.net</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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</div>Jani, thank you for the very detailed explanation - there are a number of<br>
areas that I can research, it would be great to combine DSP learning with<br>
signal processing learning.<br>
<br>
Thank you very much,<br>
Mike<br>
<br>
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-----Original Message-----<br>
From: Selmeczi János [mailto:<a href="mailto:jani.ha5ft@freemail.hu">jani.ha5ft@freemail.hu</a>]<br>
Sent: November 22, 2010 03:10<br>
To: Mike Luckham; <a href="mailto:hpsdr@lists.openhpsdr.org">hpsdr@lists.openhpsdr.org</a><br>
Subject: Re: [hpsdr] Beagleboard + Tin Can Tools Trainer board for SDR?<br>
<br>
Hi Mike,<br>
<br>
You could do some SDR development with the beagleboard. The simplest<br>
hardware configuration is a Softrock analog down converter and the<br>
beaglebord. In this case you use the beagleboard's audio codec for<br>
digitizing the I/Q output of the Softrock.<br>
Alternatice configuration could be the HPSDR hardware (Mercury + Penelope +<br>
Ozy + Atlas) and the beagleboard. In this case you get the digitized I/Q<br>
samples from the hpsdr hardware to the beagleboard using one of the board's<br>
usb port.<br>
On the software side you could develop software for the beagleboard using<br>
TI's DVSDK 4.0 GA development kit and the CodeSourcery ARM cross compiler.<br>
These development softwares currently run under ubuntu 10.04 (according to<br>
TI). The kit contains everything you need to develop software for the dsp<br>
core. Until now it was a farly complicated thing to get signal processing<br>
blocks running on the dsp. It has involved several TI software components<br>
(DSP/BIOS, DSP-LINK on the ARM and the DSP side,....). Right now its just a<br>
matter to define in which care you would like to run the signal processing<br>
routine. There is one major roadblock however. Most of the currently<br>
available sdr algorithm are implemented using floating point arithmetic.<br>
(all of the software related to the HPSDR hardware has been written this<br>
way). For the beagleboard you need to develop fixed point algorithms. It is<br>
possible to do it, but it takes time. Maybe you cab get som ideas in this<br>
respect from the dsPIC communities. They are using processors with fixpoint<br>
dsp capabilities.<br>
<br>
73,<br>
<br>
Jani, HA5FT<br>
<br>
<br>
Mike Luckham <<a href="mailto:sunrise@sunsys.net">sunrise@sunsys.net</a>>, ezt írta:<br>
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<br>
I'm new to SDR but interested in exploring - could the Beagleboard +<br>
the Tin Can Tools Trainer board<br>
(<a href="http://www.tincantools.com/product.php?productid=16149" target="_blank">http://www.tincantools.com/product.php?productid=16149</a>) be used as a means<br>
of interfacing an antenna or preamp to the Beagleboard? If so, how could<br>
the Beagleboard's DSP be used for programming? What Tapr boards would be<br>
relevant?<br>
<br>
Mike Luckham<br>
<br>
<br>
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