I'm looking for a demo of the OTG and audio features on the F4Discovery board. Or boards, as it seems more than one has it.
STM has one that does both using one of their toolchains, but I'd like one for libopencm3. Anyone got something they're willing to share, even if it's unfinished? Pretty much anything would be useful, but I think something that watched a fixed set of pins and then for each one played a different file with a fixed name, sort of like the audafruit Audio FX board (see http://www.adafruit.com/product/2341) <http://www.adafruit.com/product/2341)__> would be cool. Ok, and close to one of my requirements of adding voice alerts to a project.
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