Nic- > I'm trying to implement an FFT on the C6711. I'm using the Audio > daughter card TMDX326040A (PCM3003) to send data to the DSK and they > are connected through the McBSP1. I have successfully configured the > EDMA to perform reading and writing of data between the two > hardwares and now want to use it to perform an FFT on an audio > signal (mp3) that I'm sending in. I tried combining the FFTs > provided by TI with my coding but it does not seem to work. The > codes compile fine (no errors) but when it is loaded on to the DSK, > nothing is received back through the output of the audio daughter > card. The original TI code is written to work on the DSK only, hence > uses the McBSP0. > > I was wondering if any of you guys would be able to provide some > help and may be the coding to implement an FFT because I do not have > much time to finish this project. Have you tested your FFT by itself, without any code for the audio daughtercard? What if you pass this sequence to the FFT: x: 1, 0, 0, 0, 0, 0, 0, 0 y: 0, 0, 0, 0, 0, 0, 0, 0 Then run with length = 8? What are the results? Do you know what to expect? If that works, then add the audio codec code, but don't feed it to the FFT -- just repeat the same test again. Then take another step, then another... Ya I know, sounds simple. But the whole problem you're having is you're trying to debug too much at once. Hope you get my point. -Jeff |