How to get Connectivity Information between given modules

Hi Nataraja,

You can access the connections from an hinst by walking to "hInstTerms" and then "net":

dbGet $hinst.hInstTerms.net

Also, you might find the "userFindNetsOfSelModules.tcl" script in the gifts directory shipped with the software useful. It contains an example of how to find the common nets between selected modules using older-style FE-TCL commands.

Hope this helps,
Bob

 thanks a lot Bob....

this is what i was looking for

dbGet $hinst.hInstTerms.net

after i gets the nets connected to that first module ,i need to trace the sink pins  and find if that sink pins belong to the second module(between which i want to find connectivity  information) .......... is that it

or is their any other ingenious way :)

I think that would work, but it might be more efficient to capture the nets associated with each hinst and then find the nets common to both hinsts. There's a script in the gifts dir that could help with the list intersection part:

encounter 12> set hinst1 [dbGetHInstByName DTMF_INST/TDSP_CORE_INST]
0x2aa8959d60
encounter 14> set hinst2 [dbGetHInstByName DTMF_INST/RESULTS_CONV_INST]
0x2aa895a8c0

encounter 15> set a [dbGet $hinst1.hInstTerms.net]
encounter 16> set b [dbGet $hinst2.hInstTerms.net]

encounter 16> source <path_to_gift_scripts>/userListUtilities.tcl
encounter 17> userIntersectLists $a $b
->returns list of nets common to 2 hinsts

-Bob

Wow !!!!

simple and time efficient way to do my work .........

and im using SOC 8.1 ..... i dont have any documents on dbGet or the example's like in gifts folder .....

dbGet seems to be a powerfull tool !!!!!!! i have started using recently and i want to learn more and i have read all ur post's on dbGet

9.1 version does it have any doc's regarding this

thks again  

 today i was writing one script , i had to get the instance name's of all the hard macro in the  design

i tryed using dbGet top.insts.?

dbGet fplan.?

couldn't find any help,then i found on script in gifts floder which used 

dbforeachcell and dbInstname $cellPtr in a loop for extracting the instance name..... at the end of the day i have completed my work 

but i want to know how to get the macro names using  " dbGet " : the master command :) 

I think the docs for dbGet were improved in 9.1 as compared to 8.1.  Here's a link to the documentation online (login required):

 at my work place i even have ..... soc 9.1 ..... so ill find all those doc's about dbGet ??

how to register ???  for cadence online support information , tommo ill ask my team lead about this 

and by they way is their any way to get info about macro's using dbGet

thks a million ......bye

This is a great example of how dbGet's "-p" option is useful as well as its built-in interation function:

encounter 44> dbGet [dbGet top.insts.cell.baseClass block -p2].name
DTMF_INST/PLLCLK_INST
DTMF_INST/RAM_128x16_TEST_INST/RAM_128x16_INST DTMF_INST/RAM_256x16_TEST_INST/RAM_256x16_INST
DTMF_INST/ROM_512x16_0_INS