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timeline: only trigger in rest state

This commit is contained in:
Sebastien Bourdeauducq 2011-12-13 15:25:46 +01:00
parent 6f7a35e0a3
commit 22d03b4943
1 changed files with 4 additions and 10 deletions
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10
migen/corelogic/timeline.py
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@ -4,7 +4,7 @@ class Inst:
def __init__(self, trigger, events):
self.trigger = trigger
self.events = events
self.lastevent = max([e[0] for e in events] + [e[2] for e in events if len(e) == 3])
self.lastevent = max([e[0] for e in events])
f.Declare(self, "_counter", f.BV(f.BitsFor(self.lastevent)))
def GetFragment(self):
@ -18,14 +18,8 @@ class Inst:
[f.Assign(self._counter, f.Constant(0, self._counter.bv))],
[counterlogic])
def getcond(e):
if len(e) == 3:
if e[0] == 0:
return self.trigger & (self._counter <= f.Constant(e[2], self._counter.bv))
else:
return (self._counter >= f.Constant(e[0], self._counter.bv)) & (self._counter <= f.Constant(e[2], self._counter.bv))
else:
if e[0] == 0:
return self.trigger
return self.trigger & (self._counter == f.Constant(0, self._counter.bv))
else:
return self._counter == f.Constant(e[0], self._counter.bv)
sync = [f.If(getcond(e), e[1]) for e in self.events]