Code to check for instance

*WARNING* dbiGetHeaderMasterCellView: Failed to open cellView
(AC_block symbol) from lib (crdc_custom_work) in 'r' mode because
cellview does not exist.

I have some code that reports the connectivity of an instance and
places it in a file. In some cases some instances in the schematic
are mapped(not sure if this is the right description) to the wrong
library(they are "blinking" if that helps . Is there a way to
check for this condition and continue?

Something like:

if unable to open cellview, then print in the CIW "Failed to find
instance", else continue with original code.

Code is below.

Thank you in advance,
Eric


procedure(EFConnectivity(fileName @optional (cvEFcon geGetEditCellView
()))
let((prt PIN EFInstance EFCellname EFTerm EFNet EFCellPin
EFPinCellname EFTermName EFPinNetName EFX EFCon_list EFCon_pins
EFConInst EFConInstName EFConXtemp EFConInstNamePrev)

EFConInstNamePrev="EFNoInst"
EFCon_pins=nil
EFCon_list=nil
PIN="PIN"
EFX=0

unless(prt=outfile(fileName)
error("Could not open %s for writing" fileName)
) ; unless

fprintf(prt "Connectivity Report Format:Instance.Cellname.InstTerm
(pins).net")
fprintf(prt "\n")
fprintf(prt "\n")


when(cvEFcon
foreach( inst cvEFcon~>instances
EFInstance=inst~>name
EFCellname=inst~>master~>cellName
foreach( instTerm inst~>instTerms
EFTerm=instTerm~>name
EFNet=instTerm~>net~>name

EFCon_list=append(EFCon_list list(strcat(EFInstance "."
EFCellname "." EFTerm " - " EFNet )))

);foreach
);foreach
);when

;sort the output
EFCon_list=sort(EFCon_list nil)

;==========addition for pins
PIN="PIN"
when(cvEFcon
foreach( inst cvEFcon~>instances
if(rexMatchp(PIN inst~>name)
then EFCellPin=inst~>name
EFPinCellname=inst~>master~>cellName
);if
if( inst~>net
then
EFTermName=inst~>net~>term~>name
EFPinNetName=inst~>net~>name
EFCon_pins=append(EFCon_pins list(strcat(EFCellPin "."
EFPinCellname "." EFTermName " - " EFPinNetName )))
);if
);foreach
);when
;==============end pin addition
EFCon_pins=sort(EFCon_pins nil)


foreach( mapc EFConX EFCon_list
EFConXtemp=nil
EFConXtemp=EFConX
EFConInst=nil
EFConInst=append(EFConInst list(EFConXtemp))
EFConInstName=nil
EFConInstName=car(parseString(car(parseString(car(EFConInst)
"."))))

if(EFConInstName==EFConInstNamePrev

then
fprintf(prt EFConX)
fprintf(prt "\n")
else
fprintf(prt "\n");new instance, add a space in the file
fprintf(prt EFConX)
fprintf(prt "\n")
);if


EFConInstNamePrev=EFConInstName;capture previous value for if, then,
else above
)
fprintf(prt "\n")
foreach( mapc EFConX EFCon_pins ;process pins seperately to save
space in file, no space between "pin instances"
fprintf(prt EFConX)
fprintf(prt "\n")

);foreach

close(prt)
view(get_filename(prt))
)
t
)

 

Hi Eric,

You can use the errset() function to catch anny errors and run your
skill in a safe environment.
Would this help in your case ?

Cheers,
Riad.

 

Riad KACED wrote, on 08/24/09 18:07:

Better to explicitly code for the case rather than trapping errors with errset -
I'd always say that's a last resort, and for trapping things which are out of
your control.

If you do something like:

if(inst~>master then
; cellView is bound, so can do your processing...
...
else
; do whatever you want to do (print a message?) if the master isn't bound
...
)

At the right places in the code, then you can handle it. The master attribute
will be nil if it isn't bound.

Regards,

Andrew.

 

I went with Andrew's suggestion and was able to implement it.

Thank you both very much,
Eric