Hello John, 

Are you swapping the pins in pcb editor and then importing the layout into System Capture? As per the flow, pins within the same pin group can be swapped in pcb editor. These changes can be back-annotated to SysCap schematic using the File > Import > Layout option.

Thank you for answer. 

With this method on the schematic -> the numbering changes. On chip : 10-9-8-7-6 i want swap net label of 8 & 7. If I use the command swap pin, on the  graphic representation chip : 10-9-7-8-6

I would like just swap the net no swap pin

Thanks a lot, the script works great! And exactly as I want it to!

Can I turn the script into a button? Or do I have to run it every time from the command line?

#After sourcing the below tcl code "CustomMenu" will be added and active till the System Capture is open. If you closed the system capture then you need to source the tcl file again. See the below attached screenshot.

# For AutoLoading tcl in System Capture you can follow the below link:

support.cadence.com/.../ArticleAttachmentPortal

proc callMenu {} {

set menu {CustomMenu}

addMenuToMenuBar $menu {} 1 {} sch
addActionToMenu $menu "Swap_Net" swapNetsName {} {} {} sch


}

proc swapNetsName {} {

set pageId [sch::dbGetActivePage]
set pageSpath [sch::dbGetActivePageSpath]
set selectedItems [sch::dbGetSelectedItems $pageId]

if { [llength $selectedItems] > 0 } {

foreach item $selectedItems {

set itemId [sch::dbGetConnectedItems $item]
# puts $itemId
set itemType [sch::dbGetType $itemId]
# puts $itemType
if {$itemType eq $sch::DBTRoute} {

set name [sch::dbGetItemName $itemId]
set netpos [sch::dbGetPos $item]
set netXY [ sch::dbConvertToUserUnits $netpos]
lappend netlist $name
lappend netXYPos $netXY

}
}

# return $netlist
# return $netXYPos

if {[llength $netlist] == 2} {

# puts "$netlist"
# puts "$netXYPos"
set net0 [lindex $netlist 0]
# puts $net0
set net1 [lindex $netlist 1]
# puts $net1
set net0Xpos [lindex [lindex $netXYPos 0] 0]
# puts $net0Xpos
set net0Ypos [lindex [ lindex $netXYPos 0] 1]
# puts $net0Ypos
set net1Xpos [lindex [lindex $netXYPos 1 ] 0]
# puts $net1Xpos
set net1Ypos [lindex [lindex $netXYPos 1] 1]
# puts $net1Ypos

renameSignal -pg $pageSpath -net [list $net0Xpos $net0Ypos $net0 $net1]
renameSignal -pg $pageSpath -net [list $net1Xpos $net1Ypos $net1 $net0]

puts "Successfully interchange selected instances of $net0 with $net1"
selectObject none

}

if { [llength $selectedItems] <= 1 } {

puts "Net Interchange tcl Does Not Run For Single Net. Please Select Two Pins whose nets need to be interchanged "

}

if {[llength $selectedItems] > 2} {

puts "More than two Pins are selected, Please select two Pins"}

} else {puts "No Object Is Selected On The Schematic!"}

}

callMenu

It's the best solution! Thank you so much!

This solution is 100% functional and even allows you to add a keyboard shortcut! 

I had read another guide that asked you to put scripts in "canvas/resources/sda" Now I understand where the mistake was

Thanks again

Dear CadAP,

may i ask you if i run On SysCap -> Swap PIN. How could i swap the pin number and pin name together? Currently only Pin Number swapped without Pin Name swapped together.

Many thanks.

Moyan

MZ20250602835 

Currently only Pin Number is editable on schematic canvas. 

MZ20250602835 

Currently only Pin Number is editable on schematic canvas. 

Dear CadAP,

many thanks for your reply. I created another case for this issue: (1) Pin Swap issue from DE HDL to System Capture - Allegro X System Capture (EE Cockpit) - PCB Design & IC Packaging (Allegro X) - Cadence Community

If a solution such as tcl available may i ask you to advise me in the case above?

Many thanks again and wish you a nice day.

Best Regards

Moyan

Dear CadAP,

an update: i swapped the pins in PCB Editor and back annotated in System Capture, the design swap information gets updated on the schematic only the pin numbers were interchanged and the pin text wasn't changed.

Dear CadAP,

kindly to give a update and the solution is below:

ALLOW_PINTEXT_SWAP 'ON|OFF'

ALLOW_PINTEXT_SWAP 'ON'

MZ20250602835 

When you swap a pin name and number in the PCB editor and then backannotate the changes to Allegro System Capture, it is necessary to include the above directive in Allegro System Capture either site.cpm or project.cpm.

This directive allows the pin swap to be applied to the corresponding component within Allegro System Capture.

The pin text can also be swapped along with the pin number after defining the ALLOW_PINTEXT_SWAP directive in the START_CANVAS section of the project or site cpm.

Dear CadAP,

many thanks again.

Best Regards

Moyan