how to generate ASSURA DRC error report that shows which instance has error?

Hi SL

Unfortunately, as of the latest version Assura41USR1_HF8, it is not possible to output the instance name together with the errors. The name of the cell containing the error is listed the err file and since all instances of the cell would have the same error, perhaps you can simply search the layout for all instances of the cell. This can be a workaround. E.g. for a simple top level search, we can have:

instList=list()
cv=geGetWindowCellView()
foreach( inst cv~>instances
   if( inst~>cellName=="myErrorCell" then
      instList=cons(inst~>name instList)
   ) ;if
) ;foreach
printf("Instances %L has drc error xyz\n" instList)

Best regards
Quek

 Hi Quek,

 Thanks for your advice! So unfortunate to know latest ASSURA cannot output the instance name together with the errors.

But i not very understand your workaround. Lets take my test case as an example. Let my test case be layout A, inside my layout A, i have 3 instances A1, A2, and A3. After I run ASSURA DRC on A, the *.err file only shows the cell name A and the coordinate of the errors. So what I don't understand here is how you get the cell list for myErrorCell? 

 I have a workaround in my mind which make my program to read the errors coordinate and search the instance name at the coordinate. My instances are not overlapping each other so I think i can do that, but I hope that I can straight away get my solution through ASSURA DRC because I would like to keep my run time short.

 Regards,

SL

 Hi Quek,

Thanks for your help. I've tried the avFlattenCell but still i could not make it to not to flatten the instances that I have. my avFlattenCell procedure as below:

procedure( avFlattenCell(cellName width height numShapes numInsts)

prog(()

return()

);prog

);procedure

Is there anything wrong with my avFattenCell? this procedure will be added in my rsf file right?

Thanks,

SL

Hi SL

Sorry for the late reply. Your avFlattenCell procedure looks fine. It will be added to your rsf file which you can view by pressing the "View rsf" button. Would you please retry using the latest version of Assura and see if the problem still occurs? May I also have the following info?

a. Length and width of any of your instances that was flatten
b. Number of devices in the instance

Thanks
Quek

 Hi Quek,

I can view the rsf file by pressing the button and the avFlatten function is there.

For the information that you request:

a) all of my instances are being flatten, basically all of my instances are standard cells which is quite small.

b) number of device can be different for each cell but since it's standard cell so the device is not much.

I've tested a test case and i can get the instances not flatten

for the 600++ cells in my layout. i duplicate them( making each instance exist twice in my layout) and with this method only I'm able to make ASSURA not flatten my cells.

it feel strange for me because it suppose to not flatten my cells even though my instance only exist once in my layout. Can you help me to resolve this? Do you know why the avFlattenCell will only works when there's more than 1 same instance in my layout?

Thanks,

SL

Hi SL

Your observations are correct. I will find out more and let you know. In the meantime, would you please use ?preserveCells cmd as a workaround? You can use "*" wildcard in the cmd.

Best regards
Quek

Hi SL

Unique cells will always be expanded. This can be disabled using the following:

avParameters(
   ?expandUniqueCells nil
)

Best regards
Quek