Okay, thanks for the help, we'll start looking into it and maybe purchase a beagle board for evaluation.
By the way, there doesn't seem to be a link to the patch in 1) (unless I am slow and this is some dark humor ;) Dan On Thu, Jan 15, 2009 at 10:37 PM, Philip Balister <philip.balis...@gmail.com > wrote: > On Thu, Jan 15, 2009 at 12:51 PM, Dan <dan....@gmail.com> wrote: > > Hi, has anyone had success porting GNU Radio to Gumstix? I would like to > > install it on the Overo Earth board (OMAP 3503 with ARM Cortex-A8) if > > possible. I searched around but couldn't find much written about this. > It > > would nice to connect Gumstix to the USRP at least. > > At this years SDR Forum I did a demo of Gnu Radio running on the > Beagle Board (http://www.beagleboard.org). The Beagle Board is fairly > close to the gumstix overo product line. > > You should be able to build gnuradio radio for the overo via > OpenEmbedded. I haven't had time to try this, but I plan to in > February, if I can get some free time (as in no other paying work). > > The list of issues at the moment: > > 1) GNU Radio is obsessed with floating point :) For my demo, I > converted one of the FIR filters to use the NEON co-processor. GCC is > not real good at genereating good code for NEON, so I used GCC inline > assembly. The patch is here : > > 2) The USRP code depends on knowing internal structures of > libusb-0.12. Angstrom is using the libusb-1.0 code which breaks the > USRP. I can build Angstrom with libusb-01.12, but it is a "nuisance". > We need to work though this issue anyway for GNU Radio to run as > distros convert to libusb-1.0 anyway. > > 3) The Overos have an EHCI host, which is the best place to attach the > USRP, but you will need a hardware mod to make this interface work. > Expect an email from Gumstix about this. In the past, I've had some > success on the MUSB port also. This needs work. > > 4) We need to add support in GNU Radio based on the patch in 1. > > 5) I can run bits of "make check" by mounting the OE build dir via > NFS, but there are some libtool issues to resolve. > > 6) Convert more floating point to use NEON. > > 7) Add better support to GNU Radio for suing data types other than > float. (Maybe not as critical for the OMAP3, but there are some > interesting platforms that would benefit from this) > > 8) Future Gumstix products may use the OMAP3 with the DSP. (The Beagle > already has the DSP) Moving algorithms to the DSP should be > interesting. This DSP is not floating point, see 7. > > Hopefully, this gives people an idea of how to migrate GNU Radio off > "big iron" onto smaller, lower power, hardware. I'm glad to answer > specific questions and do plan to work on OMAP3 support as I have > time. > > Philip >
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