[Ktechlab-devel] Howto implement a logic bidir pin?

[Sébastien Dugué]

  Thanks David, it works great. I was not far from the solution
but was a bit off concerning the conductance for an output.

  Thanks again...

  Sébastien.


On Fri, 2006-01-13 at 18:35 +0000, David Saxton wrote:
> It sounds like what you're doing should work...
> 
> In the PIC component, the bidir pin is implemented as a LogicOut, with high 
> impedance when configured as input and low impedance when configured as an 
> input.
> 
> // Create the logic pin
> LogicOut * l = createLogicOut();
> 
> // Make it an input
> l->setOutputHighConductance( 0.0 );
> l->setOutputLowConductance( 0.0 );
> bool inputState = l->isHigh();
> 
> // Make it in output
> l->setOutputHighConductance( 0.01 );
> l->setOutputLowConductance( 0.01 );
> l->setHigh( outputState );
> 
> The above code should work, (but I haven't tested it..)
> 
> David Saxton
> 
> 
> On Friday 13 January 2006 16:59, Sébastien Dugué wrote:
> >   Hi all,
> >
> >   I'm currently trying to implement a component (logic) with
> > bidirectional pins. I made those pins with createLogicOut()
> > but I can't seem to be able to drive a level on those pins
> > when tied to a PIC.
> >
> >   I tried messing with setOutputHighConductance() and
> > setOutputLowConductance() to revert the pin direction but
> > to no avail.
> >
> >   What's the proper way to implement true bidir pins?
> >
> >   Thanks, and keep the good work, it's pretty impressive.
> >
> >   Sébastien.
> 
> 
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-- 
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  Sébastien Dugué                BULL/FREC:B1-247
  phone: (+33) 476 29 77 70      Bullcom: 229-7770

  mailto:sebastien.dugue at bull.net

  Linux POSIX AIO: http://www.bullopensource.org/posix
                   http://sourceforge.net/projects/paiol
 
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