Designer’s Guide Community

vivkr

Community Fellow

Offline

Posts: 780

Problems assigning parameterizable values in cell (Cadence ADE)
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

Back to top

IP Logged

oermens Community Member Offline Posts: 86	Re: Problems assigning parameterizable values in cell (Cadence ADE) Reply #1 - 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.
Back to top	IP Logged

vivkr

Community Fellow

Offline

Posts: 780

Re: Problems assigning parameterizable values in cell (Cadence ADE)
Reply #2 - 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

Back to top

IP Logged

Andrew Beckett Senior Fellow Offline Life, don't talk to me about Life... Posts: 1742 Bracknell, UK	Re: Problems assigning parameterizable values in cell (Cadence ADE) Reply #3 - 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.
Back to top	IP Logged

vivkr

Community Fellow

Offline

Posts: 780

Re: Problems assigning parameterizable values in cell (Cadence ADE)
Reply #4 - 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:

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.

Back to top

IP Logged

vivkr

Community Fellow

Offline

Posts: 780

Re: Problems assigning parameterizable values in cell (Cadence ADE)
Reply #5 - 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

Back to top

IP Logged

Frank Wiedmann Community Fellow Offline Posts: 677 Munich, Germany	Re: Problems assigning parameterizable values in cell (Cadence ADE) Reply #6 - 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/ch...).
Back to top	IP Logged