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ptp: Adjust for delay when setting time in PTP TD model

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
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Alex Forencich
2026-02-13 21:25:37 -08:00
parent 8b6fb5fdb2
commit ce8147f174
1 changed files with 8 additions and 2 deletions
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10
src/ptp/tb/ptp_td.py
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@@ -102,6 +102,12 @@ class PtpTdSource(Reset):
p += Decimal(self.drift_num) / Decimal(self.drift_denom) p += Decimal(self.drift_num) / Decimal(self.drift_denom)
return p / Decimal(2**32) return p / Decimal(2**32)
def get_delay_cycles(self):
return 14*17+self.td_delay-1
def get_delay_ns(self):
return self.get_delay_cycles() * self.get_period_ns()
def set_ts_tod(self, ts_s, ts_ns, ts_fns): def set_ts_tod(self, ts_s, ts_ns, ts_fns):
self.ts_tod_s = int(ts_s) self.ts_tod_s = int(ts_s)
self.ts_tod_ns = int(ts_ns) self.ts_tod_ns = int(ts_ns)
@@ -123,7 +129,7 @@ class PtpTdSource(Reset):
self.set_ts_tod_ns(Decimal(t).scaleb(9, self.ctx)) self.set_ts_tod_ns(Decimal(t).scaleb(9, self.ctx))
def set_ts_tod_sim_time(self): def set_ts_tod_sim_time(self):
self.set_ts_tod_ns(Decimal(get_sim_time('fs')).scaleb(-6)) self.set_ts_tod_ns(Decimal(get_sim_time('fs')).scaleb(-6) + self.get_delay_ns())
def get_ts_tod(self): def get_ts_tod(self):
ts_tod_s, ts_tod_ns, ts_rel_ns, ts_fns = self.timestamp_delay[0] ts_tod_s, ts_tod_ns, ts_rel_ns, ts_fns = self.timestamp_delay[0]
@@ -161,7 +167,7 @@ class PtpTdSource(Reset):
self.set_ts_rel_ns(Decimal(t).scaleb(9, self.ctx)) self.set_ts_rel_ns(Decimal(t).scaleb(9, self.ctx))
def set_ts_rel_sim_time(self): def set_ts_rel_sim_time(self):
self.set_ts_rel_ns(Decimal(get_sim_time('fs')).scaleb(-6)) self.set_ts_rel_ns(Decimal(get_sim_time('fs')).scaleb(-6) + self.get_delay_ns())
def get_ts_rel(self): def get_ts_rel(self):
ts_tod_s, ts_tod_ns, ts_rel_ns, ts_fns = self.timestamp_delay[0] ts_tod_s, ts_tod_ns, ts_rel_ns, ts_fns = self.timestamp_delay[0]