95 lines
2.4 KiB
Python
95 lines
2.4 KiB
Python
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from litescope.common import *
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class LiteScopeTerm(Module):
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def __init__(self, dw):
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self.dw = dw
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self.sink = sink = Sink(data_layout(dw))
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self.source = source = Source(hit_layout())
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self.trig = Signal(dw)
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self.mask = Signal(dw)
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###
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self.comb += [
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source.stb.eq(sink.stb),
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source.hit.eq((sink.data & self.mask) == self.trig),
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sink.ack.eq(source.ack)
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]
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class LiteScopeTermCSR(LiteScopeTerm, AutoCSR):
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def __init__(self, dw):
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LiteScopeTerm.__init__(self, dw)
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self._trig = CSRStorage(dw)
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self._mask = CSRStorage(dw)
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###
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self.comb += [
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self.trig.eq(self._trig.storage),
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self.mask.eq(self._mask.storage)
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]
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class LiteScopeRangeDetector(Module):
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def __init__(self, dw):
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self.dw = dw
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self.sink = sink = Sink(data_layout(dw))
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self.source = source = Source(hit_layout())
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self.low = Signal(dw)
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self.high = Signal(dw)
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###
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self.comb += [
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source.stb.eq(sink.stb),
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source.hit.eq((sink.data >= self.low) & (sink.data <= self.high)),
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sink.ack.eq(source.ack)
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]
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class LiteScopeRangeDetectorCSR(LiteScopeRangeDetector, AutoCSR):
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def __init__(self, dw):
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LiteScopeRangeDetector.__init__(self, dw)
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self._low = CSRStorage(dw)
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self._high = CSRStorage(dw)
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###
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self.comb += [
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self.low.eq(self._low.storage),
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self.high.eq(self._high.storage)
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]
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class LiteScopeEdgeDetector(Module):
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def __init__(self, dw):
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self.dw = dw
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self.sink = sink = Sink(data_layout(dw))
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self.source = source = Source(hit_layout())
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self.rising_mask = Signal(dw)
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self.falling_mask = Signal(dw)
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self.both_mask = Signal(dw)
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###
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self.buffer = Buffer(self.sink.description)
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self.comb += Record.connect(self.sink, self.buffer.sink)
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rising = Signal(dw)
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rising.eq(self.rising_mask & sink.data & ~self.buffer.source.data)
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falling = Signal(dw)
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falling.eq(self.falling_mask & sink.data & ~self.buffer.source.data)
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both = Signal(dw)
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both.eq(self.both_mask & sink.data & ~self.buffer.source.data)
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self.comb += [
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source.stb.eq(sink.stb & self.buffer.source.stb),
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self.buffer.source.ack.eq(source.ack),
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source.hit.eq(rising | falling | both)
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]
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class LiteScopeEdgeDetectorCSR(LiteScopeEdgeDetector, AutoCSR):
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def __init__(self, dw):
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LiteScopeEdgeDetector.__init__(self, dw)
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self._rising = CSRStorage(dw)
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self._falling = CSRStorage(dw)
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self._both = CSRStorage(dw)
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###
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self.comb += [
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self.rising.eq(self._rising.storage),
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self.falling.eq(self._falling.storage),
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self.both.eq(self._both.storage)
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]
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