V-USB-MIDI
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http://cryptomys.de/horo/V-USB-MIDI/index.html
概要
This USB MIDI is build upon an Atmel AVR ATmega16?, powered from USB through 2 diodes (3.5 volts). Up to eight potentiometers (AVCC/AGND) are connected to the analog inputs (PORTA) which are converted to a range from 0x00..0x7F to create midi controls (CC). On my Atmel AVR STK500 starter kit I've tested a simple key routine (PORTB), which sends eight "white" keys (60, 62, 64, 65, 67, 69, 71, 72). Serial debugging is enabled. MIDI messages are received from PC but for now only a LED is toggled (and a debug message sent to UART). This interface shows up on my linux PC and works fine with vanilla kernel >=2.6.23.x or with a little patch for my very old sidux realtime kernel 2.6.22.1-rt9.
This device is class compliant, I use device class audio/midi stream.
