User guide

7-33
VCD and VPD File Utilities
starttime start_time
Specify the start time to start dumping the value change data to
the VCD file. If this command is not specified the start time will be
the start time of the VPD file.
Note:
Only one +start command is allowed in a command file.
endtime end_time
Specify the end time to stop dumping the value change data to
the VCD file. If this command is not specified the end time will be
the end time of the VPD file.
Note:
Only one +end command is allowed in a command file, and must
be equal to or greater than the start time.
Limitations
• dumpports is mutually exclusive with either the dumpvars or
dumpvcdports commands. The reason is dumpports
generates an EVCD file while both dumpvars and
dumpvcdports generates standard VCD files.
• Escaped identifiers must include the trailing space.
• Any error parsing the file will cause the translation to terminate.
The vpdmerge Utility
Using vpdmerge utility, you can merge different VPD files storing
simulation history data for different simulation times, or parts of the
design hierarchy into one large VPD file. For example in the DVE