ClockFrequency(cd_or_sig, set_freq=None) to get/set the frequency of a domain or signal

This commit is contained in:
Jevin Sweval 2022-05-23 12:09:27 -07:00
parent 6e42082128
commit 32dc99ebe0
2 changed files with 18 additions and 0 deletions

View File

@ -8,6 +8,7 @@ import logging
import math import math
from migen import Record from migen import Record
from migen.fhdl.structure import ClockDomain
from litex.soc.integration.soc import colorer from litex.soc.integration.soc import colorer
@ -56,3 +57,17 @@ def clkdiv_range(start, stop, step=1):
while current < stop: while current < stop:
yield int(current) if math.floor(current) == current else current yield int(current) if math.floor(current) == current else current
current += step current += step
def ClockFrequency(cd_or_signal="sys", set_freq=None):
CF = ClockFrequency
CF.freqs = getattr(CF, 'freqs', {})
if set_freq is not None:
if isinstance(cd_or_signal, ClockDomain):
CF.freqs[cd_or_signal.name] = set_freq
else:
CF.freqs[cd_or_signal] = set_freq
else:
try:
return CF.freqs[cd_or_signal]
except KeyError:
raise KeyError(f"ClockFrequency has not yet been set for domain/signal '{cd_or_signal}'")

View File

@ -36,6 +36,7 @@ class IntelClocking(Module, AutoCSR):
else: else:
raise ValueError raise ValueError
self.clkin_freq = freq self.clkin_freq = freq
ClockFrequency(clkin, set_freq=freq)
register_clkin_log(self.logger, clkin, freq) register_clkin_log(self.logger, clkin, freq)
def create_clkout(self, cd, freq, phase=0, margin=1e-2, with_reset=True): def create_clkout(self, cd, freq, phase=0, margin=1e-2, with_reset=True):
@ -45,6 +46,8 @@ class IntelClocking(Module, AutoCSR):
if with_reset: if with_reset:
self.specials += AsyncResetSynchronizer(cd, ~self.locked) self.specials += AsyncResetSynchronizer(cd, ~self.locked)
self.comb += cd.clk.eq(clkout) self.comb += cd.clk.eq(clkout)
ClockFrequency(cd, set_freq=freq)
ClockFrequency(clkout, set_freq=freq)
create_clkout_log(self.logger, cd.name, freq, margin, self.nclkouts) create_clkout_log(self.logger, cd.name, freq, margin, self.nclkouts)
self.nclkouts += 1 self.nclkouts += 1