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    • increase file IO speed between eZdsp and pc?

    increase file IO speed between eZdsp and pc?

    This question is not answered
    SnakesForBrains
    Posted by
    on Apr 09 2010 15:42 PM
    Prodigy100 points

    hi folks,

    I have a C5505 eZdsp USB stick with CCSv4, and I've been using the file IO functions extensively for regression testing.  In several cases, the file IO speed is a bottleneck--if the C5505 program could only read or write that file faster, it would finish much faster.  Is there any way to increase the file IO speed between the eZdsp and the PC, by (for example) tweaking the USB transfer speed?   Anybody ever looked into this?

     

    thanks!

    -Rob

     

    C5505 eZdsp CCSv4 stdio
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    • abhishek seth9849
      Posted by
      on Apr 12 2010 04:31 AM
      Intellectual560 points

      Hi,

      I am unable to perform File IO on eZDSP. I tried 'fscanf' & 'fprintf' but they doesnt work. Can u post an example code that performs file IO on eZDSP.

      Thanks

      Abhishek

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    • Jon Halland
      Posted by
      on Aug 20 2012 19:33 PM
      Prodigy180 points

      Any tips or info on improving the ezdsp/PC file I/O speed ?

      My system: CCS5.2, ezdsp5515

      I'm using stdio functions: fopen, fread, fwrite, fclose to process a 15 sec audio signal on the ezdsp5515, and save the result in an ASCII file. The files are approx 9 Mbytes, the total c5515 processing (ASCII char -> long -> audio processing -> long -> ASCII char) time is ~8.4 sec. The total time to process this is with the ezdsp/PC file io is ~65 MINUTES !!!???

      The signal is processed on a frame basis and the 15 sec signal contains ~5600 frames.

      I tried placing the input and output files on a ram drive, but that did not seem to have any influence on the time required.

      What is causing this massive overhead ? are there ways to improve the speed ?

       

       Cheers

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