Audio interface in Spartan 3E Starter kit

Sep 20, 2006 1 Replies
F

Hi All,



I like to use the Spartan 3E Starter kit as audio capture/playback developping system as it has Linear Technology's DAC and ADC built in. Ideally I want to be able to connect it to a computer speaker and microphone just like a computer sound card. But I guess it requires some external analog circuit and also the line-in and line-out connector to interfac with the DAC and ADC.



Is there any reference design avaialbe for this type of external circuit? Or if there is any commercial expansion/add-on card to support this purpose that works with Spartna 3E Starter Kit?



Thanks a lot!



William



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E

I've gotten audio output on the S3Esk DAC. See here for details:

formatting link

Unfortunately, Digilent chose to put both the ADC and DAC on the same SPI interface, so because they have slightly different wordsizes and timing, making a system that can do simultaneous analog input and output is a bit more challenging. It also eats into your bandwidth.

If you're interested in audio applications of FPGAs, the site mentioned above has links to a community of folks who are working in that area.

Eric

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