def sig(self,
name,
dtype=BIT,
clk=None,
syncRst=None,
def_val=None,
nop_val=NO_NOPVAL) -> Union[RtlSignal, RtlSyncSignal]:
"""
Create new signal in this context
:param clk: clk signal, if specified signal is synthesized
as SyncSignal
:param syncRst: synchronous reset signal
:param def_val: default value used for reset and intialization
:param nop_val: value used a a driver if signal is not driven by any driver
"""
_def_val = self._try_cast_any_to_HdlType(def_val, dtype)
if nop_val is not NO_NOPVAL:
nop_val = self._try_cast_any_to_HdlType(nop_val, dtype)
if clk is not None:
s = RtlSyncSignal(self, name, dtype, _def_val, nop_val)
if syncRst is not None and def_val is None:
raise SigLvlConfErr(
"Probably forgotten default value on sync signal %s", name)
if syncRst is not None:
r = If(syncRst._isOn(), RtlSignal.__call__(s, _def_val)).Else(
RtlSignal.__call__(s, s.next))
else:
r = [RtlSignal.__call__(s, s.next)]
if isinstance(clk, (InterfaceBase, RtlSignal)):
clk_trigger = clk._onRisingEdge()
else:
# has to be tuple of (clk_sig, AllOps.RISING/FALLING_EDGE)
clk, clk_edge = clk
if clk_edge is AllOps.RISING_EDGE:
clk_trigger = clk._onRisingEdge()
elif clk_edge is AllOps.FALLING_EDGE:
clk_trigger = clk._onRisingEdge()
else:
raise ValueError("Invalid clock edge specification",
clk_edge)
If(clk_trigger, r)
else:
if syncRst:
raise SigLvlConfErr("Signal %s has reset but has no clk" %
name)
s = RtlSignal(self, name, dtype, def_val=_def_val, nop_val=nop_val)
return s
def sig(self, name, dtype=BIT, clk=None, syncRst=None, def_val=None):
"""
Create new signal in this context
:param clk: clk signal, if specified signal is synthesized
as SyncSignal
:param syncRst: synchronous reset signal
"""
if isinstance(def_val, RtlSignal):
assert def_val._const, \
"Initial value of register has to be constant"
_def_val = def_val._auto_cast(dtype)
elif isinstance(def_val, Value):
_def_val = def_val._auto_cast(dtype)
elif isinstance(def_val, InterfaceBase):
_def_val = def_val._sig
else:
_def_val = dtype.from_py(def_val)
if clk is not None:
s = RtlSyncSignal(self, name, dtype, _def_val)
if syncRst is not None and def_val is None:
raise SigLvlConfErr(
"Probably forgotten default value on sync signal %s", name)
if syncRst is not None:
r = If(syncRst._isOn(),
RtlSignal.__call__(s, _def_val)
).Else(
RtlSignal.__call__(s, s.next)
)
else:
r = [RtlSignal.__call__(s, s.next)]
If(clk._onRisingEdge(),
r
)
else:
if syncRst:
raise SigLvlConfErr(
"Signal %s has reset but has no clk" % name)
s = RtlSignal(self, name, dtype, def_val=_def_val)
self.signals.add(s)
return s