get_clock_domain_info (::quartus::sta)
The following table displays information for the get_clock_domain_info Tcl command:
Tcl Package and Version |
Belongs to ::quartus::sta 1.0 |
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Syntax | get_clock_domain_info [-h | -help] [-long_help] [-edge_slack] [-hold] [-mpw] [-recovery] [-removal] [-setup] | |||
Arguments | -h | -help | Short help | ||
-long_help | Long help with examples and possible return values | |||
-edge_slack | Compute edge TNS (this option may significantly increase memory consumption) | |||
-hold | Hold Analysis | |||
-mpw | Minimum Pulse Width Analysis | |||
-recovery | Recovery Analysis | |||
-removal | Removal Analysis | |||
-setup | Setup Analysis (Default) | |||
Description |
Similar to create_timing_summary, the get_clock_domain_info command returns a Tcl list of information about each active clock domain: the clock name, worst-case slack, endpoint TNS, number of endpoints in the domain with negative slack, and the timing model for which the worst-case slack is most critical. If the edge_slack option is specified, an extra entry for the edge TNS will be present, placed after the endpoint TNS. Computing the edge TNS may result in a significant increase in memory consumption. TNS is total negative slack, and it is the sum of all slacks less than zero for either destination registers or ports in the clock domain (endpoint TNS) or for all edges affecting the clock domain (edge TNS). By default, this command creates a Setup Summary. This command can also generate a Hold Summary (-hold), Recovery Summary (-recovery), Removal Summary (-removal), or Minimum Pulse Width Summary (-mpw). |
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Example Usage |
project_open my_project # Always create the netlist first create_timing_netlist read_sdc my_project.sdc update_timing_netlist # Get domain summary object set domain_list [get_clock_domain_info -setup] foreach domain $domain_list { set name [lindex $domain 0] set slack [lindex $domain 1] set keeper_tns [lindex $domain 2] puts "Clock $name : Slack = $slack , TNS = $keeper_tns" } # The following command is optional delete_timing_netlist project_close |
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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. |