[sdiy] Proposed DSP board

[Tim Ressel]

Tom,

I am currently struggling with the codec issue. One possibility is the AD1998. The AD1988 had 6 in/10 out with one interface, but I need to go over it and see if I can bypass all the surround sound stuff. 

As far as the processor goes, you raise a good point. I picked AVR for the good reason of I know it have have used it many times. If I use a non-AVR then I'll be learning 2 new procs. Not sure I want to do that. But as you pointer out, my choice may lead to others having to learn 2 new procs. 

What to do? I could leave the co-proc off and let developers attach their fav uP to it. Or if there was just 1 other proc choice I could put both on the board. But that sounds messy and wasteful. 

What you you think?

--TimR

--- On Wed, 1/21/09, Tom Wiltshire <tom at electricdruid.net> wrote:

> From: Tom Wiltshire <tom at electricdruid.net>
> Subject: Re: [sdiy] Proposed DSP board
> To: madhun2001 at yahoo.com
> Cc: "Synth-Diy" <synth-diy at dropmix.xs4all.nl>
> Date: Wednesday, January 21, 2009, 12:21 PM
> Tim,
> 
> It looks pretty good to me. I've got one thought and
> one question. The thought is that you've only got one
> codec interface on the dsPIC, so you might be better off
> looking for a multichannel codec to attach to the one port,
> rather than connect more than one. But there are two SPI
> interfaces available, so maybe not. One to investigate.
> The question is why the coprocessor is AVR if the DSP is a
> dsPIC. It seems to me that the AVR people won't like it
> because they'll have to learn something new to use the
> DSP, and the PIC people won't like it because
> they'll have to learn something new to use the
> interfaces. Have you got a good reason for this choice?
> 
> Keep up the good work.
> 
> Regards,
> Tom
> 
> 
> On 21 Jan 2009, at 18:25, Tim Ressel wrote:
> 
> > Yo,
> > 
> > Here are the proposed features for a new DSP platform:
> > 
> > dsPIC33f256gp710 processor
> > --External RAM
> > --At least 1 codec (more if feasible)
> > MIDI connections
> > --In, thru
> > USB for downloads
> > AVR coprocessor to handle MIDI, USB, and front panel
> duties
> > --Optional with jumpers to route midi to dsPIC
> > 
> > if you have suggestions for other features please let
> me know. My goal is to have this in fab as soon as possible.
> > 
> > Thanks!
> > 
> > --TimR
> > _______________________________________________
> > Synth-diy mailing list
> > Synth-diy at dropmix.xs4all.nl
> > http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> >