3 Replies Latest reply on Sep 11, 2012 9:41 PM by userc_40301

I2S and EMIF

userc_43919 Sep 11, 2012 9:41 PM

I want to put I2S (TX/RX), DMA_Tx, DMA_Tx and EMIF to a design. DMA_Tx transfers data from RAM to I2S-Tx. DMA_Rx transfers data from I2S-Rx to EMIF.

I started with a simple one with DMA transferring data from RAM to EMIF. It worked as desired. I then enabled the DMA_Tx for transferring data from RAM to I2S-Tx. No data is coming out from the I2S data pin. If I disable the DMA for RAM to EMIF, I can then get output from I2S data out. Is it possible the two DMAs fighting for resource?

1. Re: I2S and EMIF

JoMe_264151 Sep 7, 2012 4:27 AM (in response to userc_43919)

Normally DMAs are not "fighting" for resources. When you upload your project here or at least the DMA settings and setup calls we all can have a look at and check for mismatches.

To do so: Build -> clean Project

File -> Create Workspace Bundle (minimal)

and finally upload the resulting archieve here.



Bob
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2. Re: I2S and EMIF

userc_40301 Sep 9, 2012 5:36 PM (in response to userc_43919)
Here is the project zip file.

I2S_TO_Parallel.cywrk.Archive01.zip 285.2 K
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3. Re: I2S and EMIF

userc_40301 Sep 11, 2012 9:41 PM (in response to userc_43919)

It is working now after I corrected DMA Td configuration.



Now I can visually analyze ADC I2S output with my LogicPort logic analyzer.
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