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need to access the first registers to I/O pads using db commands

abhaska

Hi all

 I need to access the first registers  to i/o pads using db commands... i've used procedures calling technique.. i'm able to access the

instances upto 2nd level.. but unable to further proceed  through the path as the instance are more between i/os and registers.

I've used a pointer  for the further access of the instances by recalling the procedure.. but the infinite loop prob occurs..

Can anyone pls help me in this regard..

Thanks

Arun

 

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  • abhaska

    Hi Bob

    Thanks for your reply..

    My intention here is to access the registers which are found first in the trace path from any

    I/O pad.. I'm able to access the first instance which is connected to one of the terminals of  I/O pad.But that instance is not a register..So i need to access the instances until a register is found..

    Later in the same way i need to access for the other terminals and nets connected to the same I/O  pad...

    Let me show you my script which I've been working on..

    proc input_inst_ptr {inst_ptr} {

             dbForEachInstOutputTerm $inst_ptr termPtr {
                                    set termName [dbTermName $termPtr]
                                    set netPtr [dbTermNet $termPtr]
                                    set netName [dbNetName $netPtr]

                         dbForEachNetInputTerm $netPtr outputTermPtr {
                                    if { [dbIsObjTerm $outputTermPtr] == 1}  {
                                        set instName [dbTermInstName $outputTermPtr]
                                        set instPtr [dbGetInstByName $instName]
                                        set cellName [dbInstCellName $instPtr]
                                        set cellPtr [dbInstCell $instPtr]


                                         if {[dbIsCellSequential $cellPtr]} {
                                            puts   "Input Reg Name :$instName"
                                            puts "Input Reg Name :$instName"

                                       }   else {

                                         input_inst_ptr $instPtr

                                             }
                                                                              }


                                                                  }

                                                 }

                 }
     

    Here the procedure takes an instance pointer  (ex: I/O instance for the first time and

    later other instances) as its argument and traces the paths for its

    corresponding terminals until a register is found in that path...

    Awaiting your reply

    -Arun

Reply
  • abhaska

    Hi Bob

    Thanks for your reply..

    My intention here is to access the registers which are found first in the trace path from any

    I/O pad.. I'm able to access the first instance which is connected to one of the terminals of  I/O pad.But that instance is not a register..So i need to access the instances until a register is found..

    Later in the same way i need to access for the other terminals and nets connected to the same I/O  pad...

    Let me show you my script which I've been working on..

    proc input_inst_ptr {inst_ptr} {

             dbForEachInstOutputTerm $inst_ptr termPtr {
                                    set termName [dbTermName $termPtr]
                                    set netPtr [dbTermNet $termPtr]
                                    set netName [dbNetName $netPtr]

                         dbForEachNetInputTerm $netPtr outputTermPtr {
                                    if { [dbIsObjTerm $outputTermPtr] == 1}  {
                                        set instName [dbTermInstName $outputTermPtr]
                                        set instPtr [dbGetInstByName $instName]
                                        set cellName [dbInstCellName $instPtr]
                                        set cellPtr [dbInstCell $instPtr]


                                         if {[dbIsCellSequential $cellPtr]} {
                                            puts   "Input Reg Name :$instName"
                                            puts "Input Reg Name :$instName"

                                       }   else {

                                         input_inst_ptr $instPtr

                                             }
                                                                              }


                                                                  }

                                                 }

                 }
     

    Here the procedure takes an instance pointer  (ex: I/O instance for the first time and

    later other instances) as its argument and traces the paths for its

    corresponding terminals until a register is found in that path...

    Awaiting your reply

    -Arun

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