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vcs waveform support #183

Merged
merged 1 commit into from
Jun 2, 2022
Merged

vcs waveform support #183

merged 1 commit into from
Jun 2, 2022

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bensampson5
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@bensampson5 bensampson5 commented May 26, 2022 •
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I'd like to contribute code to add waveform support for vcs via waves=True. It dumps out an fsdb (fast signal database) file which is the synopsys waveform format. I tested this on VCS R-2020.12-SP1 and it works.

I also modified the name of the simulation executable (which vcs by default names "simv" if you don't specify anything). If you have multiple unit tests this becomes a data hazard (by overwriting a previous simv) if they're all called simv so instead I named the executable after the test name and used vcs's -o flag to give it the name.

Great work btw - I love using this package!

@bensampson5
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Here's proof that it's working for me as you can see the VCS FSDB dumper being called.

INFO     cocotb:simulator.py:291      0.00ns INFO     Found test test_rtl_template_and2.cocotb_test_rtl_template_and2
INFO     cocotb:simulator.py:291      0.00ns INFO     running cocotb_test_rtl_template_and2 (1/1)
INFO     cocotb:simulator.py:291      0.00ns INFO     Hello world!
INFO     cocotb:simulator.py:291 ucli% fsdbDumpfile /home/bsampson/code/ghe/bsampson/rtl_template/build/test_rtl_template_and2.fsdb; fsdbDumpvars 0 rtl_template_and2; run; quit;
INFO     cocotb:simulator.py:291 *Verdi* Loading libsscore_vcs202012.so
INFO     cocotb:simulator.py:291 FSDB Dumper for VCS, Release Verdi_R-2020.12, Linux x86_64/64bit, 11/19/2020
INFO     cocotb:simulator.py:291 (C) 1996 - 2020 by Synopsys, Inc.
INFO     cocotb:simulator.py:291 *Verdi* : Create FSDB file '/home/bsampson/code/ghe/bsampson/rtl_template/build/test_rtl_template_and2.fsdb'
INFO     cocotb:simulator.py:291 *Verdi* : Begin traversing the scope (rtl_template_and2), layer (0).
INFO     cocotb:simulator.py:291 *Verdi* : End of traversing.
INFO     cocotb:simulator.py:291 3000000000.00ns INFO     cocotb_test_rtl_template_and2 passed
INFO     cocotb:simulator.py:291 3000000000.00ns INFO     **************************************************************************************************************
INFO     cocotb:simulator.py:291                          ** TEST                                                  STATUS  SIM TIME (ns)  REAL TIME (s)  RATIO (ns/s) **
INFO     cocotb:simulator.py:291                          **************************************************************************************************************
INFO     cocotb:simulator.py:291                          ** test_rtl_template_and2.cocotb_test_rtl_template_and2   PASS   3000000000.00           0.24   12700646997.67  **
INFO     cocotb:simulator.py:291                          **************************************************************************************************************
INFO     cocotb:simulator.py:291                          ** TESTS=1 PASS=1 FAIL=0 SKIP=0                                  3000000000.00           0.83   3622838640.47  **
INFO     cocotb:simulator.py:291                          **************************************************************************************************************
INFO     cocotb:simulator.py:291 
INFO     cocotb:simulator.py:291 $finish at simulation time                    3

@themperek themperek merged commit 1a821b4 into themperek:master Jun 2, 2022
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Thank you!

@bensampson5 bensampson5 deleted the vcs_wave_support branch June 9, 2022 17:01
@bensampson5 bensampson5 mentioned this pull request Jun 9, 2022
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@bensampson5 @themperek