Intel® Quartus® Prime Pro Edition User Guide: Scripting

ID 683432
Date 10/04/2021
Public

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3.1.28.21. set_time_format (::quartus::sdc_ext)

The following table displays information for the set_time_format Tcl command:

Tcl Package and Version

Belongs to ::quartus::sdc_ext

Syntax set_time_format [-h | -help] [-long_help] [-decimal_places <decimal_places> ] [-unit <unit> ]
Arguments -h | -help Short help
-long_help Long help with examples and possible return values
-decimal_places <decimal_places> Number of decimal places to use
-unit <unit> Default time unit to use
Description

Sets time format, including time unit and decimal places. Time units are assumed to be nanoseconds (ns) by default. The "-unit" option overrides the default time units. Legal time unit values are: ps, ns, us, ms. Time units are displayed with three decimal places by default. The "-decimal_places" option overrides the default number of decimal places to show. The smallest resolution of all times units is one picosecond (ps). Any additional specified precision will be truncated.

Example Usage
# Create two clocks with a clock period of 8 nanoseconds.
create_clock -period 8.000 clk1

set_time_format -unit ps -decimal_places 0
create_clock -period 8000 clk2
Return Value Code Name Code String Return
TCL_OK 0 INFO: Operation successful
TCL_ERROR 1 ERROR: The default time unit can be set to ms, us, ns, or ps. Please specify one of these units instead.

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