A simple arduino signal generator

Forum 2005-2010 (read only) General Exhibition
7

PORTD include from D0 to D7 . It's a I/O register.

And DDRD =0xFF means pinMode(0,OUTPUT) to pinMode(7,OUTPUT)

But I don't use the D12 for button now (in shield I use D10), it can used as a switch button for different waveform.