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Forums > Digital IC > Floorplanning, Place and route

Subject: db command to return cell PG pin layer shape
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aidans
Posts: 35
Online: User is Offline
7/04/2008 4:38 AM  
After the design is imported, I can find one instance

set instPtr [dbGetInstByName hier/instName ]
set cellPtr [dbInstCell $instPtr ]

dbForAllCellPGFTerm $cellPtr ftermPtr {
        set name [dbFTermName $ftermPtr]
        puts "$name, $ftermPtr"
}


I get the following:

VDD  0x59bbc830
VSS  0x472796e0


Can we return the layer shape of the PG Pin? 
In Encounter GUI, we can see the cell's PG pin, which defined in the LEF file.




eminemshow
Posts: 75
Online: User is Offline
7/07/2008 7:29 AM  
Hi,Aidans

You can use 'dbForEachFTermLefPort', then 'dbForEachLefPortLayerShape' to get what you want.

BRs
BobD
Posts: 80
Online: User is Offline
7/07/2008 9:14 AM  
Hi aidans, eminemshow's tips are very helpful I'm sure. I think you can get what you're after with the commands he suggests. If you're looking for an example where these commands are used, you might want to have a look at "userVerifyBump.tcl" which is shipped with the software in the gifts directory. There is a proc defined within that script that retrieves a list of each pgterm, its layer, and its box coordinates. Here is an example of how it can be used: 

source <install_path>/share/fe/gift/scripts/tcl/userVerifyBump.tcl
[DEV]encounter 18> set inst [dbGetInstByName DTMF_INST/TDSP_CORE_INST/TDSP_CORE_GLUE_INST/i_6112]                     
0x2a9baf9100
[DEV]encounter 19> set pgterm [dbGetPGTermByName $inst VDD]                                       
0x2a9e3040f8
[DEV]encounter 20> userPGTermLayerBoxList $pgterm $inst                                           
{1 {1003200 1617600 1003560 1619200}} {1 {1003560 1617600 1004240 1619550}} {1 {1004240 1617600 1005840 1619200}}
As an aside, I should mention that dbGet is in the process of being enhanced to support information like this so hopefully it will be easier to get the information you're after in the near future. Hope this helps, Bob
aidans
Posts: 35
Online: User is Offline
7/07/2008 9:47 PM  

Thank you eminemshow and Bob!  Problem solved.

If yoiu guys keep posting like  this, I will falling love with you. AHHA...,  I am kidding. 

cheers!




eminemshow
Posts: 75
Online: User is Offline
7/10/2008 12:40 AM  
Posted By aidans on 7/07/2008 9:47 PM

Thank you eminemshow and Bob!  Problem solved.

If yoiu guys keep posting like  this, I will falling love with you. AHHA...,  I am kidding. 

cheers!






Really glad to help you, aidans!
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Forums > Digital IC > Floorplanning, Place and route > db command to return cell PG pin layer shape


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