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How to post process CDF parameters ?

waynedyer12

I am using IC5141.

Issue is that I have a cyclic CDF parameter, based on which various fields are calculated in CDF form.

But I now need this value to "settle" down to a fixed value after user performs changes on CDF form.

 

e.g. So lets say CDF choices are  "calculate A"  & "calculate B"

Based on above choice parameters  A & B gets set. So if user chooses "calculate B", and enter value of A,

callback functions will calculate value of B. Once this is done, I want to be able to post process this when

form changes are applied, such that it goes back to "calculate A".

 
I found that in CDF form, if I use "doneProc" to define  a function that will reset choice to A, it works

great for new instantiations, but not for existing one's. i.e. if I instantiate the cell and choose "calculate B"

and query after placement, it will show me "calculate A" (because of my post process function).

 

However, if I just query a placed instance and change to "calculate B", and hit Apply/ok, the post

process does not kick in.

 

Is there any other way to achieve this ?

  • I'm not quite sure I understand your requirement. Do you want it always to come up "calculate A" when you create a new instance? Or do you want it to reset to "calculate A" once the callbacks have computed the value of A when you'd picked "calculate B"?

    In the first case, you could use a formInitProc to set it to "calculate A" at the beginning. I'm not sure this is what you want either, because it would then (I think) reset the form when you do an edit properties on an existing instance which has the cyclic set to "calculate B" - and that would be misleading.

    In the second case, you could make your callback for field A which calculates the value in field B (when you have "calculate B" selected) also change the value of the cyclic field back to calculate A when done.

    Overall it seems a slightly strange use model. Avoiding CDF callbacks is in a general a good idea anyway - see my solution on Cadence Online Support "The Dangers of CDF Callbacks" for more info...

    Regards,

    Andrew.

     

  •  Andy,

    Issue is layout pcell can only handle "calculate A". However, for simulation, users need to be able to use "calculate B" option. I wrote my post in haste. doneProc works perfectly for me. After the values have settled, I just reset the cyclic to "calculate A"

     

    Thanks for your help.

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