i8

Keypad Microcontroller

Screen Shot 2015-04-07 at 11.49.53 PM

Finally, here is how the ATmega328 will be used to control our keypad. Two I/Os will be dedicated to the jog wheel, and four will be used by the keypad decoder. On top of that, we will use the SPI interface to connect our four 16-channel LED drivers.

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