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Message started by vivkr on Aug 27^th, 2009, 7:41am

Title: Problems assigning parameterizable values in cell (Cadence ADE)
Post by vivkr on Aug 27^th, 2009, 7:41am

Hi,

I created a cell with parameterizable components using pPar. Now I try to assign them values in form of a variable for performing a sweep but the values are reset in the form to a number (the last number used).

Could someone tell me how to get around this? I am using the IC6.1 environment of Cadence ICFB.

Thanks,

Vivek

Title: Re: Problems assigning parameterizable values in cell (Cadence ADE)
Post by oermens on Aug 27^th, 2009, 8:17am

In the Edit CDF Parameter window, there are fields for 'dontSave' and 'editable', did you fill those in mistakenly? I'm not sure what they do so I leave them blank and I have no problem using variables for parameterized devices.

Title: Re: Problems assigning parameterizable values in cell (Cadence ADE)
Post by vivkr on Sep 1^st, 2009, 4:54am

I have tried not to fill in anything at all. The only thing I had to do, and which I found strange was to add the parameters manually in the CDF. For some reason, they were not created automatically when generating the symbol from the schematic.

It seemed to work fine and I was able to assign values to the parameters and run simulations, but then suddenly, I was unable too. So I have pParam used inside the cellview but no possibility to assign these while instantiating the parameterizable device. Any clues?

Regards,

Vivek

Title: Re: Problems assigning parameterizable values in cell (Cadence ADE)
Post by Andrew Beckett on Sep 1^st, 2009, 5:59am

Is there any message in the CIW when the values get reset?

Perhaps there is a CDF callback in place which is causing the trouble?

Could you use cdfDump() to dump out the CDF for the problematic cell, to see if it gives any clues? (post it here if you can).

Regards,

Andrew.

Title: Re: Problems assigning parameterizable values in cell (Cadence ADE)
Post by vivkr on Sep 8^th, 2009, 12:08am

Hi Andrew,

I am a bit delayed in my response but I do see a warning message in the CIW which reads like:

*WARNING* Input value must be a number. Setting back to previous value

Please note that the parameters were not automatically included in the CDF when I created the symbol and I had to add them manually using the CDF editor. At that time, I chose the parameter type as "float" and was forced to specify a default value for each parameter.

Regards,

Vivek

Andrew Beckett wrote on Sep 1^st, 2009, 5:59am:

Title: Re: Problems assigning parameterizable values in cell (Cadence ADE)
Post by vivkr on Sep 8^th, 2009, 12:16am

I think I need to set the parameter type as "string" in the CDF. Probably that was the issue. Whether it is useful to let the input be parsed as a number or not is unclear to me. For the moment, I am going with the option of not parsing as number and not using any default values for the parameters.

Regards,

Vivek

Title: Re: Problems assigning parameterizable values in cell (Cadence ADE)
Post by Frank Wiedmann on Sep 8^th, 2009, 3:08am

You can find the function of the various CDF parameters in chapter 3 of the Component Description Format User Guide (http://sourcelink.cadence.com/docs/files/Release_Info/Docs/cdfuser/cdfuser6.1/chap3.html).