I have a pretty beginner question. I see that it supports two digital microphones & speakers - can someone guide as to example microphones (for http://www.digikey.com/product-detail/en/1713/1528-1028-ND/4990777?WT.mc_id=IQ_7595_G_pla4990777&wt.... example) and speakers I can use, and exactly how to connect them?
I see this in the docs (attached), so I know it's possible somehow, but I need help just getting started.
Thank you for reaching out. Let us try to help you with some information.
Yes, two microphones can be connected sharing a clock signal or, if you prefer, using different clock signals which provides more flexibility. However, at the moment there's no guide on how to connect a microphone to the Joule board.
Regarding which device would work with the Joule, any device that meets the supported protocols should do the job, in this case I2S and PDM (the one you provided in the link is a microphone amplifier, you should be looking for something like this http://www.knowles.com/kor/content/download/5988/105771/version/4/file/SPH0645LM4H-BRevB.PDF http://www.knowles.com/kor/content/download/5988/105771/version/4/file/SPH0645LM4H-BRevB.PDF). Given you're now using the expansion board I believe this document is more suited to your needs http://www.intel.com/content/dam/support/us/en/documents/joule-products/intel-joule-dev-kit-hardware... http://www.intel.com/content/dam/support/us/en/documents/joule-products/intel-joule-dev-kit-hardware..., it provides the information you need when connecting devices.
This other document provides the available formats http://www.intel.com/content/dam/support/us/en/documents/joule-products/intel-joule-module-datasheet... http://www.intel.com/content/dam/support/us/en/documents/joule-products/intel-joule-module-datasheet..., check section 11.
This thread might be of help when investigating how to connect your own microphone to any embedded device that supports these protocols https://ez.analog.com/thread/11759 https://ez.analog.com/thread/11759.
Hope you find this information useful.
Thank you for the info. Your first link didn't show up (points to a file in your local file system ( /message/456215 file:///C:/Users/pmelendx/Downloads/SPH0645LM4H-BRevB.PDF). Would you mind re-publoading? Thank you!
Personally, I've never tried connecting a speaker before, and didn't find any guide on how to do it for the Joule. However, I did found a really useful tutorial for the Edison that you might try to implement on your Joule, http://alextgalileo.altervista.org/blog/lets-make-noise-play-audio-edison/?doing_wp_cron=1488393783.... http://alextgalileo.altervista.org/blog/lets-make-noise-play-audio-edison/?doing_wp_cron=1488393783..... The audio device used in this guide was a Plantronics USB headset, but I believe any other headset or speaker would do the job. What you can do is to look for the specifications of the USB headset he's using and get your own device based on these specs.