[Fpga-synth] I can't believe this

[Eric Brombaugh]

You almost lost me there.

 From the Blue/White terminology I assume you're talking about the color 
of the rotary encoder shells. Apparently the encoder outputs are swapped 
between the two different types. Odd, but not surprising - I'm sure 
Digilent buys parts from the cheapest vendor and figured that the 
encoder direction was less important than saving a few cents on the BOM.

I suppose you could install a shorting jumper between the GND and IO12 
pins of J4 on one type of board and then add some logic to your FPGA 
design to detect the presence of that jumper and swap the encoder 
inputs. That way at least you could get away with only one bitstream.

The nice thing about standards is that there are so many of them.

Eric

Scott Gravenhorst wrote:
> I'm trying to use my digital waveguide synth on all four of my S-3Esk
> boards just to hear what that sounds like.  On 2 of them, I'm having a
> problem adjusting the filter.  Then I notice it works backwards.  Even with
> the power on demo.  The ones that work as I expect (clockwise increases
> value), are blue.  The ones that work backward are white.  I see no way to
> detect which one is installed, so I will have to invent some BS method of
> telling the board.  Annoying, but it was pretty inexpensive.