[Elecraft] KDSP2 development: How 'open source' is the code?

[Vic K2VCO]

One thing that would be hard would be to change the user interface. This would require 
mods to the K2's main processor firmware. Only one person in the world can do that, and 
his initials are WB.

On 2/15/2011 6:38 AM, Andrew Moore wrote:
> I recently acquired a KDSP2 from a fellow list member, and would like to do
> some KDSP2 development - ideas include
>
> - implementing a continuously-variable bandwidth DSP filter (like on K3) by
> interfacing to an external rotary encoder
> - implementing APF
> - simplifying the user interface (fewer pushbuttons/menus)
> - using external rotary encoder to vary noise reduction paramters
> - ditch RTTY/SSB support, preserve RTC support
>
> I don't want to get into a debate about which features you'd like to see
> (everyone's different) - this is probably just a one-off project for now,
> for myself.
>
> What I'm wondering is given the appropriate development tools, how much of
> the KDSP2 code can be rewritten?  Do we have access to only the the shapes
> of the filters, for example, or is it possible to take over the KDSP2 and do
> external I/O, write functions, etc. as if it's an embedded system? So as not
> to reinvent the wheel, do we have access to code that's already been written
> for AuxBus communication, startup/init, routines to read pushbuttons, etc.?
>
> If I do custom coding like this, how does it "hook" into the K2 for button
> presses and display stuff -- is this where the AuxBus comes in? Is there
> counterpart code inside the K2 that needs to be written, or is there some
> sort of API that I'd go through for button reads / display updates / etc?
>
> Help from anyone who has been this route would be appreciated --
> recommendations for tools, description of K2/KDSP2 architecture, etc...  I
> understand Lyle KK7P has loads of knowledge about this, and I've
> communicated with him some, but I've trying to give him some elbow room
> until he's got more availability in a few weeks.
>
> Thanks,
> --Andrew, NV1B

-- 
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/