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analyzer: use picosecond resolution in VCD output. Closes #528
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@ -109,8 +109,8 @@ class VCDManager:
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self.codes = vcd_codes()
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self.current_time = None
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def set_timescale_ns(self, timescale):
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self.out.write("$timescale {}ns $end\n".format(timescale))
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def set_timescale_ps(self, timescale):
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self.out.write("$timescale {}ps $end\n".format(round(timescale)))
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def get_channel(self, name, width):
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code = next(self.codes)
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@ -367,7 +367,7 @@ def decoded_dump_to_vcd(fileobj, devices, dump):
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vcd_manager = VCDManager(fileobj)
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ref_period = get_ref_period(devices)
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if ref_period is not None:
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vcd_manager.set_timescale_ns(ref_period*1e9)
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vcd_manager.set_timescale_ps(ref_period*1e12)
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else:
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logger.warning("unable to determine core device ref_period")
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ref_period = 1e-9 # guess
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