Altera SDC and TimeQuest API Manuel d'utilisateur télécharger pdf (Page 167)

Chapter 2: SDC and TimeQuest API Package and Commands 2–157

sta

write_sdc

Usage

write_sdc [-expand] [-history] <file_name>

Options

-expand: Generate SDC file by expanding the macros

-history: Reports full history of assignments

<file_name>: Name of output file

Description

Generates an SDC file with all current constraints and exceptions. When you use the -expand option,

derive_clocks, derive_pll_clocks, derive_lvds_clocks and derive_clock_uncertainty macros are be

expanded to corresponding sdc assignments before they are written to a file. If you do not use the -expand

option, these macros are preserved.

Example

project_new test

create_timing_netlist

create_clock -period 10 -name clk10 clk

set_multicycle_path -from [get_cells a] -to [get_cells b]

update_timing_netlist

report_timing

write_sdc my_sdc_file.sdc

delete_timing_netlist

project_close

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Altera SDC and TimeQuest API Manuel d'utilisateur Page 167