On 4/7/07, Gerhard Fiedler <lists@connectionbrazil.com> wrote:
> Vasile Surducan wrote:
>
> >> Is there any way to simulate external devices, like serial EEPROMs or SD
> >> cards? MPSIM would be the best but gpsim or other would also do.
>
> > True simulation of any serial programable device can be made only in
> > the real world.
>
> "True simulation" in the sense you are using is a contradiction in terms :)


True simulation = minimal adressing, data reading/writting on a
particular device

>
> > Mostly because there are small timing differencies between various
> > manufacturers products, so even a simulation works, a real connection
> > may not work.
>
> Taking this argument to the extreme: Small timing differences between
> individual batches (or even components) of the same make/model exist, so
> just because one chip works, the next may not work. So why spending time
> and nerves on designing anything at all? :)

well, right I have asked myself many times :) Because:
a. you got some many for such a job
b. you have too much spare time (after retirement, maybe...) and you
still like to play
c. you have no time, no money but you like to play


>
> > So why spending time and nerves on simulation?
>
> Because many of the problems that appear in designing a product are in the
> range that can be found with a simulator, possibly more conveniently than
> using the "real connection".

If the simulator is buggless... difficult to believe such beast exist. :)

>
> Just because simulation doesn't address /all/ problems, it doesn't mean
> that it's not a good tool. You read data sheets, don't you? A data sheet is
> not really any different than a simulation of a device. A simulation is the
> data sheet in a computer-readable form.

Come one Gherhard! Reading a data sheet is totaly different than using
device itself in a product. It's like simulating with a perfect
simulator if you wish.
>From datasheet to real product is a very long way but I have the
feeling you know it.

Happy Easter !
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