[sdiy] MIDI Switch

[The Old Crow]

On Fri, 15 Mar 2002, Andre Majorel wrote:

> On 2002-03-15 11:01 -0800, Moho Disco wrote:
> 
> > I want to make a little box with
> > a 3-way switch on it that changes
> 
> Doesn't look too hard. I guess you would need an UART and a
> microcontroller that runs a code somewhat like this one :
> 
>   int chin  = 0;
>   int chout = 1;
>   for (;;)
>   {
>     unsigned char b = getc (midi_in);
>     if ((b & 0x80) && b < 0xf0 && (b & 0x0f) == chin)
>       b = (b & 0xf0) | chout;
>     putc (b, midi_out);
>   }

  Easy for a PIC/AVR, etc.  Can use something like PIC16F628 or its AVR 
equivalent.  (Actually, it could be done in a 12C508 8-pin part if 
hardware uarts aren't desired).

Crow
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