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about mcbsp and edma3

qinbin wang
Prodigy 220 points
Other Parts Discussed in Thread: OMAPL138

hi,

   Recently,i am reuse the code of mcbsp_test and edma3_test and write a  similary program,the purpose is to get serial audio signal and print it.

   The result is i can get signal exactly ,but it can only do this job and i even couldn't close the process again.

   Before i execute this process ,i can connect it with telnet,while if i start  the process, telnet will down,it seems that system is dead but i can get audio signal,i am amazed.

   Could anyone help me and give me some suggestion,in my opinion ,the problem maybe the interrupt set.

   Thank you!

  • 0
    TI__Mastermind 25055 points

    Hello,

    Could you please provide more details?  Which device is this for?  What SW version are you using?

    Regards,
    Marc

  • 0 in reply to MarcPyne
    Prodigy 220 points

        Sorry,my board type is omapl138,my dvsdk is ti-dvsdk_omapl138-evm_4_01_00_09,the problem i mentioned before has been resolved.

        But there is  a very important question,i use and modify edma3lld_01_11_00_03 examples code,now i could get audio signal and which is existing in register,i want to translate this signal to dsp and encode itto wav or other file format ,the problem is how should i design it.

        I supposed this is a big project and i have to design the arm side and the dsp side code,i know there are many examples in ti-dvsdk_omapl138-evm_4_01_00_09,but they are disorder,not system part.In my opinion ,i have to use codec engine because using stub and skeleton algorithm is efficient.

       So could you help me and give me some suggestion in top mind, maybe it will use thread ,i think it should. How should i start writing my project and are there some good examples i could consult? Now i cann't find the main key,please give me a hand!

       Thank you very much!