Design Rule Checks in Allegro System Capture
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• $CDS_SITE/cdssetup/canvas/rules/custom – If a custom site is defined, place
the rules file at $HOME/cdssetup/canvas/rules/custom – You can also place the
rules file in your HOME area.
After a custom rules file is placed, create a tclIndex file for the custom rules using the
auto_mkIndex Tcl command from a Tcl shell. A standalone Tcl shell is supplied with
Cadence SPB installation at: /tcltk/bin/tclsh.
Allegro System Capture Tcl Graphics API
Basic Scripting Tcl Types
The following table lists some basic scripting Tcl types along with their descriptions:
Tcl Type Description
dbId Unique ID associated with an object. Example db:0000002a
dbPoint List of x and y coordinates. Example {0 100}
dbBox List of two dbPoints denoting the upper-left and lower-right
coordinates of a rectangle. Example {{0 0} {100 100}}
dbBool Boolean (True/False) value
dbType Type number denoting the type of an object
DB API Table of Tcl Procedures
The sch namespace should be prefixed to each of the Tcl API functions. Example: The
following call returns a list of selected items on the current page:
set selItem [sch::dbGetSelectedItems [sch::dbGetActivePage]]
The following table lists the supported Tcl DB APIs:
# Name ARG1 ARG2
RETURN
TYPE
Description
1 dbConvertToDBUnits number number
Converts number in user
units to database units
2 dbConvertToUserUnits number number
Converts number in
database units to user units
3 dbGetActivePage dbId returns the dbId of the
active page
