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Re: [softrock40] Re: Interesting SDR project funded by DARPA

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  • Alex Turcu
    The reasons I m waiting are probably related to me (and money) rather than the technology available. I did try on a iMX233-OLinuxXino but it proved far too
    Message 1 of 36 , Oct 29, 2012
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      The reasons I'm waiting are probably related to me (and money) rather than the technology available. 

      I did try on a iMX233-OLinuxXino but it proved far too slow to even run the softrock server without the dsp-server (or just even a plain pulseaudio audio server). Cheap as it is, I dislike the RPi for its closed SoC, and I seriously doubt it has the horsepower for SDR (last time I checked I had no confirmation it would work). While it does have a GPU that may have enough horsepower, it lacks OpenCL support and Broadcom don't seem to eager to implement it anytime soon (nor release specs for the open-source community to implement).

      I would be very interested trying it on a BeagleBone. I really like the BeagleBone's modular design, you could probably stack a radio board on top, without even requiring cables, but I'm not prepared to buy one without a confirmation it has the required horsepower. It does have a GPU, but OpenCL support requires an NDA, making it un-workable.

      Three boards that would probably take the load well are BeagleBoard-XM, A13-OLinuXino and PandaBoard-XM. I once ran a simple FM decoder on OSSIE (a SDR software stack) on a BeagleBoard+USRP with ~90% cpu utilization (and no acceleration), and at least Sid managed to run HiQSDR (including the unnecessary QtRadio which takes up CPU for displaying the waterfall) on the Pandaboard. They all have some some sort of accelerator on-chip for future expansion, but neither one is ideal (C64 is non-standard, OpenCL on the SGX requires NDA, Mali400 doesn't even support OpenCL). Out of these three, I would only be confident with the PandaBoard, but I won't buy one because of its cost.

      Given all of the above, the Parallella board with out-of-the-box OpenCL/C/C++ support feels like a breeze of fresh air. Sure, I talked a lot about OpenCL and DSP, which I personally won't have time to get around to write any code for anytime soon, but I'm an idealistic person. That being said, I just remembered I do have an A13 device I completely forgot about (an mk801 Android mini-PC), so instead of writing long and useless rants, I should probably try my Peaberry on it.

      Alex



      On Sat, Oct 27, 2012 at 5:20 PM, David Turnbull <dturnbull@...> wrote:
       

      Alex,


      Why wait? Just stick a Peaberry on a Raspberry Pi or your favorite SoC platform. Since the Peaberry has two sound cards and a key jack built-in, just one USB cable between the two boards is all you need.

      73 David AE9RB

      On Sat, Oct 27, 2012 at 11:12 AM, Alex Turcu <talex004@...> wrote:


      Parallella reached the goal on Kickstarter. Now I can't wait for standalone SDRs based on this thing and a softrock/peaberry clone stacked on it.
      Alex



    • Sid Boyce
      They must get a real good deal as the Origen board starts at $199.
      Message 36 of 36 , Oct 29, 2012
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        They must get a real good deal as the Origen board starts at $199.
        http://www.samsung.com/global/business/semiconductor/minisite/Exynos/platform_partners_platform.html#Arndale-Board
        73 ... Sid.

        On 29/10/12 22:02, Alex Turcu wrote:
         

        ODROID-X is indeed an impressive platform. However at $129 it seems subsidized (the CPU module itself sells for $119 and is out of stock), but as with the BeagleBone, I like the modularity!

        Alex

        On Mon, Oct 29, 2012 at 5:37 PM, Sid Boyce <sboyce@...> wrote:
         

        I gave up on the Pi largely because of the USB load problems and the tussles I had with trying unsuccessfully to get sound working.

        I have replaced it with the ODROID-X which is running hiqsdr-server, dspserver and QtRadio happily.
        73 ... Sid.

         
        On 29/10/12 20:25, Shirley Márquez Dúlcey wrote:
         

        > Cheap as it is, I dislike the RPi for its closed SoC, and I seriously doubt it has the horsepower for SDR (last time I checked I had no confirmation it would work). While it does have a GPU that may have enough horsepower, > it lacks OpenCL support and Broadcom don't seem to eager to implement it anytime soon (nor release specs for the open-source community to implement)


        The closed-source issue is no longer true as of a few days ago: http://www.raspberrypi.org/archives/2221

        The lack of computing power remains. I don't know whether the GPU in the Pi has enough flexibility to implement meaningful OpenCL support... though with the driver source now available it's something the community can investigate.

        Broadcom has historically been a problem for the open-source community, notably its WiFi interfaces. Kudos to them for opening up the source for the SoC in the Pi.



        -- 
        Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
        Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
        Senior Staff Specialist, Cricket Coach
        Microsoft Windows Free Zone - Linux used for all Computing Tasks
        



        -- 
        Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
        Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
        Senior Staff Specialist, Cricket Coach
        Microsoft Windows Free Zone - Linux used for all Computing Tasks
        
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