[ibis-macro] Re: IBIS in parameter tree format

  • From: ckumar <ckumar@xxxxxxxxxxx>
  • To: <Arpad_Muranyi@xxxxxxxxxx>
  • Date: Mon, 09 Jan 2012 09:09:41 -0800

The tree format will give you great expandability  and flexibility; also
as you noted it is easily "machine" processable.

The downside is in the "human" readability side. This can be addressed to
a certain extent by formatting

I think overall the positives outweigh the negative

On Mon, 9 Jan 2012 16:54:19 +0000, "Muranyi, Arpad"
<Arpad_Muranyi@xxxxxxxxxx> wrote:
> Walter,
> 
> I changed the subject line so we can keep track of the
> topics easier.
> 
> Interesting concept.  It seems that this wouldn't be too
> hard to do, and it could be done by preserving all the
> functional rules and descriptions of all the keywords.
> We could even attempt to do this with the reformatting
> of the IBIS specification itself.  No technical changes,
> only format and syntax changes.
> 
> I am just trying to understand the big picture better with
> the following question.  What is the benefit of doing this?
> I know it may be easier to parse it and write a parser for
> it, but is there anything else we would gain by doing this?
> 
> Thanks,
> 
> Arpad
> ============================================================
> 
> -----Original Message-----
> From: Walter Katz [mailto:wkatz@xxxxxxxxxx] 
> Sent: Friday, January 06, 2012 2:59 PM
> To: Muranyi, Arpad; 'IBIS-ATM'
> Subject: RE: [ibis-macro] Analog BIRD overview slide
> 
> Arpad,
> 
> Let me bring this concept one step further. As per Kumar's suggestion,
> this might be a good time to consider changing the IBIS file to a
> parameter tree format.
> 
> The following should make this clear as mud:
> 
> (Components 
>    (Component
>       (Name <component>)
>       (Pins
>           (Pin (Number "1") (Signal "DQ0") (Model "DQOUT") 
>                   (Package (PMI_File "pkg.pmi") (Params (pkglen .01) (Zo
> (Corner 50 45 55))))))
>           (Pin (Number "2") (Signal "DQ1") (Model "DQOUT") 
>                   (Package (PMI_File "pkg.pmi") (Params (pkglen .01) (Zo
> (Corner 50 45 55))))))
>        )
>        (Diff_Pin
>                  (Labels diff_pin  inv_pin  vdiff tdelay_typ tdelay_min
> tdelay_max)
>                  (                    1                2          0.1
> NA                 NA                 NA)
>        )
>    )
> )
> (Models
>     (Model 
>         (Name "DQOUT")
>         (Model_type "Output")
>         (C_comp (Corner 744.002f 744.002f 744.002f))
>         (Vmeas  .25)
>         (Vref  0.0)
>         (Rref   50)
>         (Algorithmic_Model 
>              (Executable ("Windows_VisualStudio_32"  "dqout.dll"
> "dqout.ami")  
>              (Executable ("Executable Linux_gcc3.2.3_32       "
> "dqout.so"   "dqout.ami")  
>         )
>         (Temperature_Range (Corner 25 100 0))
>         (Voltage Range (Corner 1.2  1.2  1.2))
>         (Pulldown
>               (-2.50000E+00       -5.00000E-02        -5.00000E-02
> -5.00000E-02)
>               (-0.00000E+00         0.00000E-02         0.00000E-02
> 0.00000E-02)
>               (-2.50000E+00         5.00000E-02         5.00000E-02
> 5.00000E-02)
>          )
>          (Pullup]
>               (-2.50000E+00          5.00000E-02         5.00000E-02
> 5.00000E-02)
>               (- 0.00000E+00         0.00000E-02         0.00000E-02
> 0.00000E-02)
>               (-2.50000E+00        -5.00000E-02        -5.00000E-02
> -5.00000E-02)
>          )
>         (Ramp (dV/dt_r (Corner .3/60p .3/60p .3/60p))
>                       (dV/dt_f  (Corner.3/60p .3/60p .3/60p))
>          )
>          (GND Clamp
>                     (-2.50000E+00         0     0     0)
>                     ( 0.00000E+00         0     0     0)
>                     ( 2.50000E+00         0     0     0)
>         )
>         (Power Clamp
>                     (-2.50000E+00         0     0     0)
>                     ( 0.00000E+00         0     0     0)
>                     ( 2.50000E+00         0     0     0)
>        )
>    )
> )
>                      
> Walter
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