My beagle board is clone and it is working in 200MHZ , but when I run the program it doesn't consumes to much CPU time
On Tue, Mar 16, 2010 at 9:59 PM, Jeff Brower <[email protected]> wrote: > Philip- > > > On 03/16/2010 06:51 AM, halidziya yerebakan wrote: > >> Hi all; > >> > >> Thanks to Mr. Balister I run USRP on BeagleBoard ( > >> http://www.opensdr.com/node/17) . But it doesn't give any sound when I > try > >> to listen FM radio. I think there is some mismatch in sampling rates or > data > >> format. I read other mail list archives but they didn't solve my > problem. > >> Here is my console : > >> > >> r...@beagleboard:/usr/share/gnuradio/examples/usrp# > ./usrp_wfm_rcv_nogui.py > >> Using RX d'board A: Basic Rx > >>>>> gr_fir_fff: using cortex_a8 > >> Freq: 100.1M Volume:0.100000 Setting:FREQ > >> OK > >> > aUaUaUaUaUaUaUaUuOaUaUaUaUaUuOaUaUaUaUaUuOaUaUaUaUaUuOaUaUaUaUaUuOaUaUaUaUaUuOaUaUaUaUuOaUaUaUaUaUuOaUaUaU > >> > >> (No Sound Here goes like this ) > > > > Run oprofile, find the code that takes all the time, optimize using > > NEON, repeat :) > > > > The sample rate conversions will be the CPU hogs for this waveform. It > > looks like you are using an optimized fir filter already, but work > > through the sample rates at each step. It is possible the audio out is > > doing another rate conversion. Also, the gnuradio block may create a > > very long fir filter, you can adjust the filter design settings to > > reduce the number of taps. > > > > It will work, but you do not have many GHz of cpu to cover up > > in-efficient design decisions :) > > At what rates are the OMAP 3530 cores running on the Beagle board? The web > page says "up to" 600 MHz for the ARM A8 > and up to 430 MHz for the C64x+ core. Sometimes TI eval/dsk boards don't > always run at max rate... > > Also, do you know if anyone has done work to port GNU radio functions over > to the C64x+ core? For example you mention > sample rate conversion, that would be very suitable to offload onto the > DSP. > > -Jeff > > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > -- Saygılar; Halid Ziya Yerebakan
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