Visible to Intel only — GUID: reference_TCL_tcl_pkg_project_ver_5_0_cmd_set_multicycle_assignment
Ixiasoft
Visible to Intel only — GUID: reference_TCL_tcl_pkg_project_ver_5_0_cmd_set_multicycle_assignment
Ixiasoft
3.1.24.53. set_multicycle_assignment (::quartus::project)
The following table displays information for the set_multicycle_assignment Tcl command:
Tcl Package and Version | Belongs to ::quartus::project |
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Syntax | set_multicycle_assignment [-h | -help] [-long_help] [-comment <comment> ] [-disable] [-end] [-fall] [-from <from_list> ] [-hold] [-remove] [-rise] [-setup] [-start] [-tag <data> ] [-to <to_list> ] <path_multiplier> | ||
Arguments | -h | -help | Short help | |
-long_help | Long help with examples and possible return values | ||
-comment <comment> | Comment | ||
-disable | Option to disable multicycle assignment | ||
-end | Option to indicate that destination clock cycles should be considered for path multiplier | ||
-fall | Option applies to falling edge | ||
-from <from_list> | List of clock names, node names, and/or assignment group names that represent start or source points of multicycle path, for example, {node1 node2 ...} | ||
-hold | Option to indicate that path multiplier is meant for hold | ||
-remove | Option to remove multicycle assignment | ||
-rise | Option applies to rising edge | ||
-setup | Option to indicate that path multiplier is meant for setup | ||
-start | Option to indicate that source clock cycles must be considered for path multiplier | ||
-tag <data> | Option to tag data to this assignment | ||
-to <to_list> | List of clock names, node names, and/or assignment group names that represent end or destination points of multicycle path, for example, {node1 node2 ...} | ||
<path_multiplier> | Multicycle path multiplier | ||
Description | Specifies that the given timing paths have multicycle setup or hold delays with the number of cycles specified by the "-path_multiplier" option. If neither the "-setup" nor "-hold" options are used, the "-setup" option is the default option. If neither the "-start" nor "-end" options are used, the "-end" option is the default option. You must use either the "-from <from_list>" or "-to <to_list>" option. Note that Quartus Prime timing analysis is optimized to use assignment groups for timing constraints instead of a list of nodes. Of the following two methods to make multicycle assignments, method (1) is the optimal method. (1) assignment_group "src_group" -add_member "s1" assignment_group "src_group" -add_member "s2" assignment_group "src_group" -add_member "s3" assignment_group "dst_group" -add_member "d1" assignment_group "dst_group" -add_member "d2" set_multicycle_assignment -from "src_group" -to "dst_group" (2) set_multicycle_assignment -from {s1 s2 s3} -to {d1 d2} For more information about assignment groups, type "assignment_group -h". The "assignment_group" command replaces the deprecated "timegroup" command in ::quartus::project, version 5.0. The meaning of multicycle hold differs between the Quartus Prime software timing analysis and the Synopsys PrimeTime software timing analysis. Refer to the online Help of each software for more information. Assignments created or modified by using this Tcl command are not saved to the Quartus Prime Settings File (.qsf) unless you explicitly call one of the following two Tcl commands: 1) export_assignments 2) project_close (unless "-dont_export_assignments" is specified) These two Tcl commands reside in the ::quartus::project Tcl package. You must save assignment changes before you run Quartus Prime command-line executables. Note, however, that the Tcl commands "execute_flow" and "execute_module" (part of the ::quartus::flow Tcl package) automatically call "export_assignments" before they run command-line executables. |
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Example Usage | |
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Return Value | Code Name | Code | String Return |
TCL_OK | 0 | INFO: Operation successful | |
TCL_ERROR | 1 | ERROR: Can't find active revision name. Make sure there is an open, active revision name. | |
TCL_ERROR | 1 | ERROR: Entity does not exist or uses illegal name characters: <string>. Specify a legal entity name. | |
TCL_ERROR | 1 | ERROR: Can't set revision: <string>. Make sure there is an open, active revision name. | |
TCL_ERROR | 1 | ERROR: Invalid path multiplier value: <string>. Specify a positive integer value. | |
TCL_ERROR | 1 | ERROR: You must open a project before you can use this command. | |
TCL_ERROR | 1 | ERROR: Found two options: -<string> and -<string>. Choose one of the options. | |
TCL_ERROR | 1 | ERROR: Revision does not exist: <string>. Specify a legal revision name using the -<string> option. |