Description
Get a list of nets.
Syntax
get_nets [-regexp] [-filter <arg>] [-boundary_type <arg>] [-hierarchical] [-of_objects <args>] [-quiet] [-verbose] [<patterns>...] Returns
Net objects. Returns nothing if the command fails.
Usage
| Name | Description |
|---|---|
[-regexp] |
Patterns are full regular expressions |
[-filter] |
Filter list with expression |
[-boundary_type] |
Used when source object is on a hierarchical block's pin. Valid values are 'upper', 'lower', or 'both'. If 'lower' boundary, searches from the lower level of hierarchy onwards. This option is only valid for connected_to relations. Default: upper |
[-hierarchical] |
Get nets from all levels of hierarchical cells |
[-of_objects] |
Get 'net' objects of these types: 'hw_design cell port'. |
[-quiet] |
Ignore command errors |
[-verbose] |
Suspend message limits during command execution |
[<patterns>] |
Match cell names against patterns Default: * |
Categories
Hardware
Description
Gets a list of nets in the current hardware design that match a specified search pattern. The default command gets a list of all nets in the subsystem design.
Arguments
-regexp – (optional) Specifies that the
search <patterns> are written as regular expressions. Both search
<patterns> and -filter expressions must be written as
regular expressions when this argument is used. Xilinx regular expression
Tcl commands are always anchored to the start of the search string. You can
add .* to the beginning or end of a search string to widen
the search to include a substring. See this web page for help with regular expression
syntax.regexp is not anchored, and works as a standard Tcl
command. For more information, refer to this web page.
-filter <args> – (optional) Filter the
results list with the specified expression. The -filter
argument filters the list of objects returned based on property values on
the objects. You can find the properties on an object with the
report_property or list_property
commands.
*
character can be used at the beginning or at the end of a search string to
widen the search to include a substring of the property value. * wildcard character, this matches a
property with a defined value of "".For string comparison, the specific operators that can be
used in filter expressions are equal (==),
not-equal (!=),
match (=~), and
not-match (!~). Numeric comparison
operators <, >,
<=, and >= can also be used.
Multiple filter expressions can be joined by AND and
OR (&& and
||).
For the "hardware design" object you can use the "NAME" property to filter results.
-boundary_type -
(optional) Used when source object is on a hierarchical block's pin. Valid values
are 'upper', 'lower', or 'both'. If 'lower' boundary, searches from the lower level
of hierarchy onwards. This option is only valid for connected_to relations. Default:
upper.
-hierarchical -
(optional) Get nets from all levels of hierarchical cells.
-of_objects -
(optional) Get 'net' objects of these types: 'hw_design cell port'.
-quiet – (optional) Execute
the command quietly, returning no messages from the command. The command
also returns TCL_OK regardless of any
errors encountered during execution. -verbose – (optional) Temporarily override
any message limits and return all messages from this command.set_msg_config command.
<patterns - (optional) Match
hardware design nets against the specified patterns. The default pattern is the
wildcard `*` which returns a list of all nets in the current IP integrator subsystem
design. More than one pattern can be specified to find multiple nets based on
different search criteria.
Examples
The following example gets the net attached to the specified pin of an hardware design module, and returns both the net:
hsi::get_nets -of_objects [get_pins aclk]