get_clocks (::quartus::sdc)

The following table displays information for the get_clocks Tcl command:

Tcl Package and Version

Belongs to ::quartus::sdc 1.5

Syntax get_clocks [-h | -help] [-long_help] [-include_generated_clocks] [-nocase] [-nowarn] [ <filter> ]
Arguments -h | -help Short help
-long_help Long help with examples and possible return values
-include_generated_clocks Includes generated clocks derived from the matched clocks
-nocase Specifies the matching of node names to be case-insensitive
-nowarn Do not issue warning messages about unmatched patterns
<filter> Valid destinations (string patterns are matched using Tcl string matching)
Description 
Returns a collection of clocks in the design. Use a clock collection
as the -from/to argument of a command (such as set_multicycle_path)
to refer to all nodes driven by the clocks in the collection.

# The following multicycle constraint applies to all paths ending at registers
# driven by clk
set_multicycle_path -to [get_clocks clk] 2

The filter for the collection is a Tcl list of wildcards, and must
follow standard Tcl or Timing Analyzer-extension substitution rules.
See the help for use_timing_analyzer_style_escaping for details.
Example Usage 
project_open chiptrip
create_timing_netlist
read_sdc
update_timing_netlist
set clocks [get_clocks c* -nocase]
foreach_in_collection clk $clocks {
    set name [get_clock_info -name $clk]
    set period [get_clock_info -period $clk]
    puts "$name: $period"
}
delete_timing_netlist
project_close
Return Value Code Name Code String Return
TCL_OK 0 INFO: Operation successful
TCL_ERROR 1 ERROR: Timing netlist does not exist. Use create_timing_netlist to create a timing netlist.