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unstable results with LCDKC6748

Hello,

I'm working on an audio project with lcdk-c6748, with Code Composer  6.0.1

The results which i'm getting are not stable. for example, when i'm generating noise using prbs() or prand() and trying to play it on speakers, its not always playing the noise on the output. 

From my exoerience I noticed that the following things can trigger unexpected behaviour:

1) "playing" with the functions: prbs(), prand() & using them in the code.

2)playing with the optimization levels of the compiler.

when I say they could  "triger" unexpected behavioue, I mean, that I can sometimes save "a working project" (sound is generated in the speakers, everything seems to work fine), and after it I open the unchanged project, I find out that from some reason, now the sound is not played. (it is usually begins with cracked loud sound and after it nothing is played).

what can be the reason for this behaviour? Is it a familiar behaviour resulting from bad initiallization/configuration of the card? 

  • Hi,
    What example code are you working ?
    Is that TI code or your own code ?

    If you are using TI sw package then version details ?
  • Hi Technion,

    Welcome to the TI E2E forum. I hope you will find many good answers here and in the TI.com documents and in the TI Wiki Pages. Be sure to search those for helpful information and to browse for the questions others may have asked on similar topics.

    For C6748 LCDK, the audio example projects were already available. TI has released example projects for audio which was tested on C6748 LCDK board. I would recommend you to use that at the first shot and then carry out from there.

    http://www.ti.com/tool/starterware-dsparm?keyMatch=starterware-dsparm

     

    Regards,

    Shankari

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