Re: [Simulavr-devel] connecting pins

[Klaus Rudolph]

Michael Hennebry schrieb:
> On Tue, 8 Jul 2008, Klaus Rudolph wrote:
> > > Suppose I am simulating two processors with simulavrxx.
> > > I'll want to connect a pin on one processor to a pin on the other.
> > > How do I do that?
> > > I get the impression that I need Net,
> > > but I don't know what to do with it.
> > >
> > > Likewise, what do I need to connect
> > > pins to custom simulated hardware?
>
> > Please take a look to the example code (anacomp)
>
> Thank you.
> I've added comments that might need correcting.
>
> >   38 #create some external pins
> >   39 ExtAnalogPin pain0 0 $ui "ain0" ".x"
> # create an interface to an analog gui pin
> # name it pain0
> # label it ain0
> # ".x"?
.x is the name of the window in tk. All tk objects must have a name 
which starts with a dot for the top level window. A button (b) in a 
frame (f) which is in the toplevel window will be: .f.b for example.


> >   40 ExtAnalogPin pain1 0 $ui "ain1" ".x"
> >   41 ExtPin epb $Pin_TRISTATE $ui "->BO" ".x"
> # create an interface to a digital gui pin
> # epb? $Pin_TRISTATE? ".x"?
> >   42
> >   43
> >   44 #create some nets which connect the pins
> >   45 Net ain0              # start a "wire" named ain0
> >   46 ain0 Add pain0        # add gui pin pain0 to it
> >   47 ain0 Add [AvrDevice_GetPin $dev1 "D6"]   # add pin D6 of $dev1 to it
> >   48
> >
> > Here you see avr pins and also pins from the ui. Connecting multiple cpu
> > pins is simply done by connecting them with an Add to the net.
>
> One of the custom hardware devices I have in mind
> is an LED display multiplexed by cooperating AVRs.
> I think that I will have to write that myself,
> but I don't know even what to put in a header
> file or to what to feed said header file.
LED Display? You mean a multiplexed 7 segment 4 digit thing for example?

You can "draw" such things without any c/cpp code also in tcl/tk. There 
are already elements which show the state of a net. So you can simply 
start with the code. If you have the led in rows/cols, you simple have 
to compare that p1 is high and p2 is low and change the color of the 
drawing to red from gray or something. That are the things tk is made 
for :-)

Regards
 Klaus