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In omap-L137 audio example,sound is only present in the left of my headphone

xiang lee
Prodigy 30 points
Other Parts Discussed in Thread: TLV320AIC3106, OMAP-L137

Hi.

       I’ m a new user of OMAP-L137 EVM rev. D and I have a problems to solve.I have used the audio example (its probject name is audioSample.pjt) in BIOSPSP_01_30_01.It can run but the sound is present in the left of my headphone. I don't know why,Can anyone tell me why?I am anxious about the problem.

Thanks&Best Regards

Lee xiang

  • 0
    TI__Expert 3425 points

    Can you please connect JTAG and see if the data transfer is properly happening for both the paths.

    Thanks,
    Gaurav

  • 0 in reply to Gaurav Agarwal
    Prodigy 30 points

         How to check if the data transfer is properly happening for both the paths? .Is the audiosample.pjt only read the the left of line in?If so,how can I make it both read form the left and the right of line in and make sound present in left and right of my headphone?

  • 0 in reply to xiang lee
    TI__Genius 14545 points

    Xiang -

    xiang lee said:
      How to check if the data transfer is properly happening for both the paths?

    Sorry to hear your are having problems with the project. The easiest way to determine where the problem is - is to divide and conquer.

    The OMAPL-137 EVM Rev D has an TLV320AIC3106 Audio Codec on the board which is used for the D/A and the A/D Conversion. I have not run the audioSample.pjt myself, but I have a few quick sanity checks here to make sure that the signals are getting to the board itself. Have you verified via a loopback that both channels of the analog audio are being correctly sourced to the board?

     

    If the both channels of the analog audio are getting to the DSP, I would recommend just loading the audioSample.out file that came with the EVM via JTAG. The .out file is available in the biospsp package under the following path   <install directory> packages\ti\pspiom\examples\evmOMAPL137\audio\bin\Debug. If the audioSample.out file works, than we eliminate any hardware related problems, and focus on why the audioSample project file is not rebuilding correctly.

     

    Can you try these steps and let us know the results?

  • 0 in reply to dabuan
    Prodigy 30 points

         Hi

        Drew Abuan ,thanks for you help!I have found the problem.My line which is used to translate the sound to the OMAP-L137  board has some problem.After I  replaced it with  a new one,All is OK.                                                                                                                                                                                                                         

    Thanks&Best Regards

    Lee xiang