From ec8386a797cc0e37bc07a2b3c06c0c20e0ef5533 Mon Sep 17 00:00:00 2001 From: whitequark Date: Fri, 3 Apr 2020 05:20:42 +0000 Subject: [PATCH] back.pysim: fix emission of undriven traces to VCD files. This has been originally implemented in commit d3775eed (which fixed `write_vcd(traces=)` to do something at all), but had a flaw where undriven traces would not be correctly placed in hierarchy. This used to produce incorrect results on pyvcd 0.1, but started causing assertion failures on pyvcd 0.2. Fixes #345. --- nmigen/back/pysim.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/nmigen/back/pysim.py b/nmigen/back/pysim.py index 96e98e7..398266e 100644 --- a/nmigen/back/pysim.py +++ b/nmigen/back/pysim.py @@ -93,7 +93,7 @@ class _VCDWaveformWriter(_WaveformWriter): trace_names = SignalDict() for trace in traces: if trace not in signal_names: - trace_names[trace] = trace.name + trace_names[trace] = {("top", trace.name)} self.traces.append(trace) if self.vcd_writer is None: -- 2.30.2