Where is the waveform file ? (.vcd)

[jasonlee1001]

Hi,

I did the steps as manual:
$ make install
$ make compile
$ make run_test
It runs OK and finally show "PASS", but I can't find the ".vcd" waveform file.
The message shows "dumping is suppressed." , Why ?

ps: I use iverilog V11.0

jason@dell:~/work/e200_opensource/vsim$ make run_test
...
...
TESTCASE= /home/jason/work/e200_opensource/vsim/run/../../riscv-tools/riscv-tests/isa/generated/rv32ui-p-add

VCD info: dumping is suppressed.
ITCM 0x00: 340510730001aa0d
ITCM 0x01: ff85051300002517
ITCM 0x02: 01f5222301e52023
ITCM 0x03: 040f416334202f73
ITCM 0x04: 4fa507ff02634fa1
ITCM 0x05: 0c634fad05ff0f63
ITCM 0x06: 0bff05634f8505ff
ITCM 0x07: 4f9d0dff00634f95
ITCM 0x16: 2f03f52505130000
ITCM 0x20: 2f8300052f03f065

[jasonlee1001]

I found the solution.
remove "-none" after vvp command, then the vcd file can be generated.
The message will show:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
TESTCASE= /home/jason/work/e200_opensource/vsim/run/../../riscv-tools/riscv-tests /isa/generated/rv32ui-p-add
VCD info: dumpfile testcase.vcd opened for output.
ITCM 0x00: 340510730001aa0d
......