read_sdc (::quartus::sta)
The following table displays information for the read_sdc Tcl command:
Tcl Package and Version |
Belongs to ::quartus::sta 1.0 |
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Syntax | read_sdc [-h | -help] [-long_help] [-hdl] [-instance <instance_name> ] [-no_import] [-no_sdc_promotion] [-post_fit] [-post_syn] [-project_relative] [ <file_name> ] | |||
Arguments | -h | -help | Short help | ||
-long_help | Long help with examples and possible return values | |||
-hdl | Read SDC commands embedded in HDL | |||
-instance <instance_name> | Name of the block for which we are reading the SDC file | |||
-no_import | Do not automatically import RTL SDCs from the netlist | |||
-no_sdc_promotion | Disable instance-bound scoping of constraints | |||
-post_fit | For post_syn STA. Load SDCs as if in post_fit (Includes SDC_FILE, HDL Embedded, Entity) | |||
-post_syn | For use with STA on fitter snapshots. Load SDCs as if in post_syn mode | |||
-project_relative | If passing in a relative path to a file, interpret that path relative to the current project\'s directory instead of STA\'s current directory | |||
<file_name> | Name of the SDC file | |||
Description |
Reads an SDC file with all current constraints and exceptions. If an SDC file is specified, read_sdc only reads that SDC file. If the -hdl option is specified, read_sdc only reads SDC commands that were embedded in HDL. If no arguments are specified, read_sdc reads the default SDC files along with any SDC commands that were embedded in HDL. If one or more SDC_FILE assignments exists in the QSF, read_sdc reads all of them in order. Otherwise, read_sdc reads the file <revision>.sdc if it exists. |
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Example Usage |
project_new test create_timing_netlist # Read SDC commands from test_constraints.sdc read_sdc test_constraints.sdc # Read SDC commands embedded in HDL read_sdc -hdl update_timing_netlist report_timing 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: Can't find file <string> | ||
TCL_ERROR | 1 | ERROR: The provided instance name does not exist in the current design. | ||
TCL_ERROR | 1 | ERROR: instance_name must be specified when using no_sdc_promotion. | ||
TCL_ERROR | 1 | ERROR: Timing netlist does not exist. Use create_timing_netlist to create a timing netlist. |