Hi! We’re back from a nice, much-needed holiday break! We hope your holidays were wonderful for you and your families as well.
We’ve got a great wing project here to show you, courtesy of JR from JR’s EE Blog, who has created his own audio wing for the Papilio hardware.
JR writes, “For a while now, I have wanted to do some audio processing on my Papilio One FPGA board. At first I was thinking about creating two separate wings, one with an A/D converter and one with a D/A converter, but I figure that its best to have it all on one wing. Having used Digilent Inc’s Atlys board in school and writing a controller to communicate with the onboard AC ’97 CODEC, I decided to use this type of CODEC for my wing.”
JR ends up using the same chip that is on Digilent’s Atlys board (the LM4550 chip) for his audio wing, and for the AC97 chip he goes with the Cirrus Logic CS4202. You can see JR’s PCB layout below.
JR has created prototypes of his audio wing and has successfully taken them through their paces. He seems well on his way to being able to do some tricky audio processing with the wing.
It’d be cool to use this for some DSP effects on say, a mic input or to tweak with the audio coming out of the RetroCade Synth, for example.
Props to JR on a cool project, and definitely worth a read over at his site. He’s got schematics, code, and much more over at his blog.
- Audio Wing For The Papilio One FPGA Board – Part 1
- Audio Wing For The Papilio One FPGA Board – Part 2
Feel free to discuss amongst yourselves in the comments!