Aud-I/O I2S audio breakout
Bertho is working on a breakout board for the WM8782 I2S ADC and the WM8523 I2S DAC. The boards are intended to be interfaced with an ARM micro-controller.
I am working on a project that requires some real audio and I always wanted to play with I2S (attached to an arm microcontroller). So I decided to design a breakout board with stereo audio input and output(*). It uses a Wolfson ADC WM8782 and a Wolfson DAC WM8523. All configuration pins are available on the SIL headers. The headers are at 2x10x100mil with 700mil spacing, so it should be possible to dump it into a breadboard. The breakout board can be split into a DAC and ADC part, each measuring 21.6mm by 45.1mm.
Check out the project in the forum.
This entry was posted in ARM, project logs and tagged ADC, ARM, DAC, i2s.
Comments
You have me interested.
Just follow the project log. I’ll post updates and availability when I get there.
Looks like it’ll come in handy. Don’t know if you know but Koush has done a lot of awesome work rewriting code on samsung adroid devices, Voodoo Sound app, to unlock the full potential of the Wolfson chip. I bought it the day I rooted the first Galaxy S waiting for a port to my S3 now. He’s usually more than willing to answer questions/help out. Never hurts to know another person.
It is always nice to have input from another person. I do not know which chip is used in the samsung android dev, but it is probably a bit more high-end than the one I had in mind using. Wolfson has a few very advanced chips with a lot of config options. The one in the phone probably has DAC and ADC in the same chip.
My choice was not to complicate things too much and go for a cheap(er) solution and make it easy to put on a breadboard for fast prototyping. If you need HiFi stuff or a vast config setup, you will need to design the analogue part properly and use more advanced chips, which is rather impossible on a breadboard if you need really high quality.
At least with a test-setup, you can determine whether you want to continue the I2S way (with all the ups and downs including datasheet errata) and then design a “proper” circuit for your specific needs.
Nice to see this. I was working on an 5.1 audio board, targeted at HQ. ‘Have designed PCB, but didn’t make a prototype yet.
Realized that I need a HS USB MCU, because 6 channels with 32bit/sample at 96Khz gave me 18.4 Mbps.