====== Script to Highlight Launch and Capture Clock Paths in the Layout  ======

You can use the get_timing_paths command with the get_attribute command to create collections of the timing paths, 

and use the gui_change_highlight command to highlight each collection of paths with a unique color in the GUI.

The example below uses the get_timing_paths and gui_change_highlight commands to highlight the paths for the launch and capture clocks for the 
<nowiki>
I_SDRAM_TOP/I_SDRAM_READ_FIFO/reg_array_reg_1__31_/D
</nowiki>
register input.


<code tcl>
set path [get_timing_paths -to I_SDRAM_TOP/I_SDRAM_READ_FIFO/reg_array_reg_1__31_/D \
   -group SDRAM_CLK]
gui_change_highlight -color yellow -collection $path
set launch_clock [get_timing_paths -through [get_attribute [get_attribute $path startpoint_clock] sources] \
   -to [get_attribute $path startpoint]]
gui_change_highlight -color green -collection $launch_clock
set capture_clock [get_timing_paths -through [get_attribute [get_attribute $path endpoint_clock] sources] \
   -to [get_attribute $path endpoint_clock_pin]]
gui_change_highlight -color blue -collection $capture_clock
</code>

{{:vlsi:icc:launch-capture-clock.png|}}

===== Proc Version =====
<code tcl>
proc highlight_clock_path {from_point to_point} {
  set path [get_timing_paths -from $from_point -to $to_point]
  gui_change_highlight -color yellow -collection $path
  set launch_clock [get_timing_paths -through [get_attribute [get_attribute $path startpoint_clock] sources] \
     -to [get_attribute $path startpoint]]
  gui_change_highlight -color green -collection $launch_clock
  set capture_clock [get_timing_paths -through [get_attribute [get_attribute $path endpoint_clock] sources] \
     -to [get_attribute $path endpoint_clock_pin]]
  gui_change_highlight -color blue -collection $capture_clock
}
</code>