User guide

6-1

VPD and EVCD File Generation

VPD and EVCD File Generation 1

VPD and EVCD files contain simulation history data. In Verilog

simulation, $vcdplus system tasks create these files and name them

vcdplus.vpd by default.

You can use system tasks that include the vcdplus name in the tasks,

for example, $vcdpluson, $vcdplusoff, and

$vcdplusfilename, to manipulate VPD files. To generate an

EVCD file, you can use the system tasks $dumports, and

$lsi_dumpports. You can enter these system tasks in Verilog code or

at the Interactive Window command prompt.

You can also also use specific runtime options to control how VPD

files are generated. These runtime options include +vpd in their

names, for example, +vpdbufsize, +vpdignore, etc.

This chapter covers the following topics:

• Advantages of VPD