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eZdsp 5505 DMA0 to I2S1

ted chen81331
Prodigy 170 points
Other Parts Discussed in Thread: TMS320VC5505

Hi,

Im using the TMS320VC5505 eZdsp USB Stick, running the USB AudioFilter demo code. 

Trying to modify it so that the DMA0 will move the audio input to i2s1 external connector pin (instead of the original i2s0). 

When i probe the external pin, nothing shows up. I've change the DMA destination address to i2s1 already, was wondering where else did i miss.

Do i need to do any additional initialization for the i2s1? 

Also the AudioFilter code shows up to i2s3 but the datasheet for 5505 only indicate up to i2s2, any idea about this?

Any suggestion or ideas would be highly appreciated!

regards,

ted

  • 0
    Prodigy 170 points

    I have found out that the DMA access to I2S0 can only use DMA0, and access to I2S2 can only use DMA1 based on the DMA sync events.

    So is there any suggestions on how to output the audio to the external connector i2s1 , i2s2 or i2s3?

    regards

    ted.