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Subject: Finding pin locations
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ChrisS
Posts: 1
Online: User is Offline
3/13/2006 3:25 AM  
Hi, I use this to find an instance location: set instPtr [dbGetInstByName $instName] set loc [dbInstBox $instPtr] set llx [dbDBUToMicrons [lindex $loc 0]] set lly [dbDBUToMicrons [lindex $loc 1]] set urx [dbDBUToMicrons [lindex $loc 2]] set ury [dbDBUToMicrons [lindex $loc 3]] But, How do I find a pin location? Thanks Chris
elvis
Posts: 13
Online: User is Offline
3/13/2006 7:02 AM  
Hi Chris,

You can use:

dbForEachCellFterm

To go through each cell pin.

You can then pass each ftermPtr from dbForEachCellFterm to:

dbFtermLoc

To get the pin location.

set pinLoc [dbFtermLoc $ftermPtr]

Then lindex into pinLoc:

set x_loc [lindex $pinLoc 0]
set y_loc [lindex $pinLoc 1]

You'll also want to convert from db units to microns like you did in your cell example.

Good luck!

Elvis
lisiang
Moderator
Posts: 48
Online: User is Offline
3/13/2006 8:51 AM  
you can use the following tcl procedure to zoom into a instance pin

usage: z2ip some_hier/some_instance/some_pin


proc z2ip { instName {pinName ""} } {
        if { $pinName == "" } {
                set pinName [file tail $instName]
                set instName [file dirname $instName]
        } else {
                set instName $instName
        }
        set instPtr [dbGetInstByName $instName]
        set termPtr [dbGetTermByName $instPtr $pinName]
        set termInst [dbTermInst $termPtr]
        set termName [dbTermName $termPtr]
        set termInstName [dbTermInstName $termPtr]
        set termLoc [dbTermLoc $termPtr]
        set termBox [dbTermBox $termPtr]
        set termBox0 [expr [lindex $termBox 0] *[dbHeadMicronPerDBU] ]
        set termBox1 [expr [lindex $termBox 1] *[dbHeadMicronPerDBU] ]
        set termBox2 [expr [lindex $termBox 2] *[dbHeadMicronPerDBU] ]
        set termBox3 [expr [lindex $termBox 3] *[dbHeadMicronPerDBU] ]
        set termBox [list $termBox0 $termBox1 $termBox2 $termBox3]
        set termWidth [expr $termBox2 - $termBox0]
        set termHeight [expr $termBox3 - $termBox1]
        set termLayer [dbTermLayer $termPtr]
        set termLoc_X [expr [lindex $termLoc 0] *[dbHeadMicronPerDBU] ]
        set termLoc_Y [expr [lindex $termLoc 1] *[dbHeadMicronPerDBU] ]
        set x0 [expr $termLoc_X - 1]
        set y0 [expr $termLoc_Y - 1]
        set x1 [expr $x0 + 2]
        set y1 [expr $y0 + 2]
        zoomBox $x0 $y0 $x1 $y1
        set netPtr [dbTermNet $termPtr]
        puts "$instName pinLoc: $termLoc_X $termLoc_Y ; width: $termWidth height: $termHeight "
}

li siang
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