ComputerVoltageSources

It seems like we could just put a simple RC pulse strecher on the triger input.

That should allow enough time for detection with a software scan.

There is always goin to be some latency. 5-10 milliseconds is not a lot.

Or do we really need to generate an interupt from the trigger input jack itself?

--- In ComputerVoltageSources@yahoogroups.com, "John Loffink" <jloffink@...> wrote:
>
> There are no Atom Pro 28M or 40M pinouts from Basic Micro yet, though they
> have placeholders for the data sheets and the port assignments are shown in
> the 28M schematics.  A Renasas 3664 only has 4 IRQs and the 24M already
> brings out 3 of them, and the fourth is used for the serial port TX signal.
> 
> 
> To reduce input count requirement, what about making the mode selectable?
> Program a port IO expander to set the modes, which toggles analog switches
> to toggle the modes.  If we want to make this compatible across programs,
> now is the time to do it before the hardware is designed.
> 
> John Loffink
> The Microtonal Synthesis Web Site
> http://www.microtonal-synthesis.com
> The Wavemakers Synthesizer Web Site
> http://www.wavemakers-synth.com
> 
> 
> > -----Original Message-----
> > From: ComputerVoltageSources@yahoogroups.com
> > [mailto:ComputerVoltageSources@yahoogroups.com] On Behalf Of djbrow54
> > 
> > Just to not mix multiple themes in messages ...
> > 
> > Consider the need to detect narrow triggers.  I started to look into
> > this with my PSIM but none of the I/O pin interrupts are on external
> > connectors.  Having an edge or level interrupt would be very useful to
> > detect triggers.  In several of my programs I resort to monitoring
> > changes in CV and, of course, gate signals to determine if there
> > should have been a trigger.  It would be real nice to have a way to
> > capture the trigger directly.
> > 
> > If you can't do this via interrupts, then I'd consider at least one
> > edge capture & reset circuit for an external trigger input.  I do
> > think you can do it with interrupts.  Let's hope that some of the 4
> > additional pins on the AtomPro28 have external level or edge
> > interrupts.
> > 
> > Dave
> >
>