forked from M-Labs/artiq
rtio/ttl_serdes: cleanup/rewrite
This commit is contained in:
parent
d90dff4ef1
commit
940aa815dd
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@ -1,58 +1,70 @@
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from migen.fhdl.std import *
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from artiq.gateware.rtio.phy import ttl_serdes_generic
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class OSerdese2(Module):
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class _OSERDESE2_8X(Module):
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def __init__(self, pad):
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self.o = o = Signal(8)
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self.oe = oe = Signal()
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self.t = t = Signal()
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self.o = Signal(8)
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self.t_in = Signal()
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self.t_out = Signal()
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# # #
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o = self.o
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self.specials += Instance("OSERDESE2", p_DATA_RATE_OQ="DDR",
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p_DATA_RATE_TQ="DDR", p_DATA_WIDTH=8,
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p_TRISTATE_WIDTH=1, o_OQ=pad, o_TQ=t,
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p_TRISTATE_WIDTH=1,
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o_OQ=pad, o_TQ=self.t_out,
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i_CLK=ClockSignal("rtiox4"),
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i_CLKDIV=ClockSignal("rio_phy"),
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i_D1=o[0], i_D2=o[1], i_D3=o[2], i_D4=o[3],
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i_D5=o[4], i_D6=o[5], i_D7=o[6], i_D8=o[7],
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i_TCE=1, i_OCE=1, i_RST=ResetSignal(),
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i_T1=~oe)
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i_TCE=1, i_OCE=1, i_RST=0,
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i_T1=self.t_in)
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class IOSerdese2(Module):
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class _IOSERDESE2_8X(Module):
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def __init__(self, pad):
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ts = TSTriple()
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self.o = o = Signal(8)
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self.oe = oe = Signal()
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self.i = i = Signal(8)
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self.specials += ts.get_tristate(pad)
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self.o = Signal(8)
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self.i = Signal(8)
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self.oe = Signal()
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# # #
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pad_i = Signal()
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pad_o = Signal()
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i = self.i
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self.specials += Instance("ISERDESE2", p_DATA_RATE="DDR",
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p_DATA_WIDTH=8,
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p_INTERFACE_TYPE="NETWORKING", p_NUM_CE=1,
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o_Q1=i[7], o_Q2=i[6], o_Q3=i[5], o_Q4=i[4],
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o_Q5=i[3], o_Q6=i[2], o_Q7=i[1], o_Q8=i[0],
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i_D=ts.i, i_CLK=ClockSignal("rtiox4"),
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i_CE1=1, i_RST=ResetSignal(),
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i_D=pad_i,
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i_CLK=ClockSignal("rtiox4"),
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i_CLKB=~ClockSignal("rtiox4"),
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i_CE1=1, i_RST=0,
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i_CLKDIV=ClockSignal("rio_phy"))
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oserdes = OSerdese2(ts.o)
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oserdes = _OSERDESE2_8X(pad_o)
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self.submodules += oserdes
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self.specials += Instance("IOBUF",
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i_I=pad_o, o_O=pad_i, i_T=oserdes.t_out,
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io_IO=pad)
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self.comb += [
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ts.oe.eq(~oserdes.t),
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oserdes.o.eq(o),
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oserdes.oe.eq(oe)
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oserdes.t_in.eq(~self.oe),
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oserdes.o.eq(self.o)
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]
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class Output(Module):
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class Output_8X(ttl_serdes_generic.Output):
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def __init__(self, pad):
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serdes = OSerdese2(pad)
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self.submodules += ttl_serdes_generic.Output(serdes, fine_ts_width=3)
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serdes = _OSERDESE2_8X(pad)
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self.submodules += serdes
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ttl_serdes_generic.Output.__init__(self, serdes)
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class Inout(Module):
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class Inout_8X(ttl_serdes_generic.Inout):
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def __init__(self, pad):
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serdes = IOSerdese2(pad)
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self.submodules += ttl_serdes_generic.InOut(serdes, fine_ts_width=3)
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serdes = _IOSERDESE2_8X(pad)
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self.submodules += serdes
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ttl_serdes_generic.Inout.__init__(self, serdes)
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@ -1,304 +1,273 @@
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from migen.fhdl.std import *
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from artiq.gateware.rtio import rtlink
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from migen.genlib.coding import PriorityEncoder
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from artiq.gateware.rtio import rtlink
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class Output(Module):
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def __init__(self, serdes, fine_ts_width=0):
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self.rtlink = rtlink.Interface(rtlink.OInterface(1, fine_ts_width=
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fine_ts_width))
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serdes_width = 2**fine_ts_width
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o = Signal()
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previous_o = Signal()
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override_en = Signal()
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override_o = Signal()
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io_o = Signal()
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self.overrides = [override_en, override_o]
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def _mk_edges(w, direction):
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l = [(1 << i) - 1 for i in range(w)]
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if direction == "rising":
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l = [2**w - 1 ^ x for x in l]
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elif direction == "falling":
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pass
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else:
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raise ValueError
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return l
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io = serdes
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self.submodules += io
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if fine_ts_width > 0:
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timestamp = Signal(fine_ts_width)
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# dout
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edges = Array([0xff ^ ((1 << i) - 1) for i in range(serdes_width)])
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edge_out = Signal(serdes_width)
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edge_out_n = Signal(serdes_width)
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rise_out = Signal()
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fall_out = Signal()
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self.comb += [
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timestamp.eq(self.rtlink.o.fine_ts),
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edge_out.eq(edges[timestamp]),
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edge_out_n.eq(~edge_out),
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rise_out.eq(~previous_o & o),
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fall_out.eq(previous_o & ~o),
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If(override_en,
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io.o.eq(override_o)
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).Else(
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If(rise_out,
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io.o.eq(edge_out),
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).Elif(fall_out,
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io.o.eq(edge_out_n),
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).Else(
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io.o.eq(Replicate(o, serdes_width)),
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)
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)
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]
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else:
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self.comb += [
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If(override_en,
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io_o.eq(override_o)
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).Else(
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io_o.eq(o)
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)
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]
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self.comb += [
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io.o.eq(io_o),
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]
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class _SerdesDriver(Module):
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def __init__(self, serdes_o, stb, data, fine_ts, override_en, override_o):
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previous_data = Signal()
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serdes_width = flen(serdes_o)
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edges = Array(_mk_edges(serdes_width, "rising"))
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edges_n = Array(_mk_edges(serdes_width, "falling"))
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self.sync.rio_phy += [
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If(self.rtlink.o.stb,
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o.eq(self.rtlink.o.data),
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),
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previous_o.eq(o),
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]
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class Inout(Module):
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def __init__(self, serdes, fine_ts_width=0):
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self.rtlink = rtlink.Interface(
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rtlink.OInterface(2, 2, fine_ts_width=fine_ts_width),
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rtlink.IInterface(1, fine_ts_width=fine_ts_width))
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self.probes = []
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serdes_width = 2**fine_ts_width
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self.io = io = serdes
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self.submodules += io
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io_o = Signal(serdes_width)
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io_i = Signal(serdes_width)
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o = Signal()
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rising = Signal()
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falling = Signal()
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i0 = Signal()
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self.oe = oe = Signal()
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override_en = Signal()
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override_o = Signal()
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override_oe = Signal()
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self.sensitivity = Signal(2)
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self.overrides = [override_en, override_o, override_oe]
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previous_o = Signal()
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if fine_ts_width > 0:
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# Input
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self.submodules.pe = pe = PriorityEncoder(serdes_width)
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self.sync.rio_phy += i0.eq(io_i[-1])
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self.comb += [
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io_i.eq(io.i),
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rising.eq(~i0 & io_i[-1]),
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falling.eq(i0 & ~io_i[-1]),
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pe.i.eq(io_i ^ Replicate(falling, serdes_width)),
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self.rtlink.i.data.eq(io_i[-1]),
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self.rtlink.i.fine_ts.eq(pe.o),
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]
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# Output
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timestamp = Signal(fine_ts_width)
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edges = Array([0xff ^ ((1 << i) - 1) for i in range(serdes_width)])
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edge_out = Signal(serdes_width)
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edge_out_n = Signal(serdes_width)
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rise_out = Signal()
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fall_out = Signal()
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self.comb += [
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timestamp.eq(self.rtlink.o.fine_ts),
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edge_out.eq(edges[timestamp]),
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edge_out_n.eq(~edge_out),
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rise_out.eq(~previous_o & o),
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fall_out.eq(previous_o & ~o),
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If(override_en,
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io_o.eq(override_o),
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).Else(
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If(rise_out,
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io_o.eq(edge_out),
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).Elif(fall_out,
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io_o.eq(edge_out_n),
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).Else(
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io_o.eq(Replicate(o, serdes_width)),
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)
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)
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]
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else:
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self.comb += [
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io_i.eq(io.i),
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rising.eq(~i0 & io_i),
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falling.eq(i0 & ~io_i),
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If(override_en,
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io_o.eq(override_o)
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).Else(
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io_o.eq(o),
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),
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self.rtlink.i.data.eq(io_i),
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]
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self.comb += [
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io.oe.eq(oe),
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io.o.eq(io_o),
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self.rtlink.i.stb.eq(
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(self.sensitivity[0] & rising) |
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(self.sensitivity[1] & falling)
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),
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]
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self.sync.rio_phy += [
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If(self.rtlink.o.stb,
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If(self.rtlink.o.address == 0, o.eq(self.rtlink.o.data[0])),
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If(self.rtlink.o.address == 1, oe.eq(self.rtlink.o.data[0])),
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),
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If(stb, previous_data.eq(data)),
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If(override_en,
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oe.eq(override_oe)
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),
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previous_o.eq(o),
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]
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self.sync.rio += [
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If(self.rtlink.o.stb & (self.rtlink.o.address == 2),
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self.sensitivity.eq(self.rtlink.o.data)
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serdes_o.eq(Replicate(override_o, serdes_width))
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).Else(
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If(stb & ~previous_data & data,
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serdes_o.eq(edges[fine_ts]),
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).Elif(stb & previous_data & ~data,
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serdes_o.eq(edges_n[fine_ts]),
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).Else(
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serdes_o.eq(Replicate(previous_data, serdes_width)),
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)
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)
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]
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class FakeSerdes(Module):
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class Output(Module):
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def __init__(self, serdes):
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self.rtlink = rtlink.Interface(
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rtlink.OInterface(1, fine_ts_width=log2_int(flen(serdes.o))))
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self.probes = [serdes.o[-1]]
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override_en = Signal()
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override_o = Signal()
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self.overrides = [override_en, override_o]
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# # #
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self.submodules += _SerdesDriver(
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serdes.o,
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self.rtlink.o.stb, self.rtlink.o.data, self.rtlink.o.fine_ts,
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override_en, override_o)
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class Inout(Module):
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def __init__(self, serdes):
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serdes_width = flen(serdes.o)
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assert flen(serdes.i) == serdes_width
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self.rtlink = rtlink.Interface(
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rtlink.OInterface(2, 2, fine_ts_width=log2_int(serdes_width)),
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rtlink.IInterface(1, fine_ts_width=log2_int(serdes_width)))
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self.probes = [serdes.i[-1], serdes.oe]
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override_en = Signal()
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override_o = Signal()
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override_oe = Signal()
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self.overrides = [override_en, override_o, override_oe]
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# # #
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# Output
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self.submodules += _SerdesDriver(
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serdes_o=serdes.o,
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stb=self.rtlink.o.stb & (self.rtlink.o.address == 0),
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data=self.rtlink.o.data[0],
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fine_ts=self.rtlink.o.fine_ts,
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override_en=override_en, override_o=override_o)
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oe_k = Signal()
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self.sync.rio_phy += [
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If(self.rtlink.o.stb & (self.rtlink.o.address == 1),
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oe_k.eq(self.rtlink.o.data[0])),
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If(override_en,
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serdes.oe.eq(override_oe)
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).Else(
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serdes.oe.eq(oe_k)
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)
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]
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# Input
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sensitivity = Signal(2)
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self.sync.rio += If(self.rtlink.o.stb & (self.rtlink.o.address == 2),
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sensitivity.eq(self.rtlink.o.data))
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i = serdes.i[-1]
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i_d = Signal()
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self.sync.rio_phy += [
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i_d.eq(i),
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self.rtlink.i.stb.eq(
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(sensitivity[0] & ( i & ~i_d)) |
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(sensitivity[1] & (~i & i_d))
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),
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self.rtlink.i.data.eq(i),
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]
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pe = PriorityEncoder(serdes_width)
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self.submodules += pe
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self.comb += pe.i.eq(serdes.i ^ Replicate(i_d, serdes_width))
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self.sync.rio_phy += self.rtlink.i.fine_ts.eq(pe.o)
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class _FakeSerdes(Module):
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def __init__(self):
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self.o = o = Signal(8)
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self.oe = oe = Signal(8)
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self.o = Signal(8)
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self.i = Signal(8)
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self.oe = Signal()
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class FakeIOSerdes(Module):
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class _OutputTB(Module):
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def __init__(self):
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self.o = o = Signal(8)
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self.oe = oe = Signal(8)
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self.i = i = Signal(8)
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class OutputTB(Module):
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def __init__(self):
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serdes = FakeSerdes()
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self.o = RenameClockDomains(Output(serdes, fine_ts_width=3),
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{"rio_phy": "sys"})
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self.submodules += self.o
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serdes = _FakeSerdes()
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self.submodules.dut = RenameClockDomains(Output(serdes),
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{"rio_phy": "sys"})
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def gen_simulation(self, selfp):
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selfp.dut.rtlink.o.data = 1
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selfp.dut.rtlink.o.fine_ts = 1
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selfp.dut.rtlink.o.stb = 1
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yield
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selfp.o.rtlink.o.data = 1
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selfp.o.rtlink.o.fine_ts = 1
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selfp.o.rtlink.o.stb = 1
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selfp.dut.rtlink.o.stb = 0
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yield
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selfp.o.rtlink.o.stb = 0
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selfp.dut.rtlink.o.data = 0
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selfp.dut.rtlink.o.fine_ts = 2
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selfp.dut.rtlink.o.stb = 1
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yield
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selfp.o.rtlink.o.data = 0
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selfp.o.rtlink.o.fine_ts = 2
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selfp.o.rtlink.o.stb = 1
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yield
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selfp.o.rtlink.o.data = 1
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selfp.o.rtlink.o.fine_ts = 7
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yield
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while True:
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selfp.dut.rtlink.o.data = 1
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selfp.dut.rtlink.o.fine_ts = 7
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selfp.dut.rtlink.o.stb = 1
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for _ in range(6):
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# note that stb stays active; output should not change
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yield
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class InoutTB(Module):
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class _InoutTB(Module):
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def __init__(self):
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ioserdes = FakeIOSerdes()
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self.io = RenameClockDomains(Inout(ioserdes, fine_ts_width=3),
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{"rio_phy": "sys"})
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self.submodules += self.io
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self.serdes = _FakeSerdes()
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self.submodules.dut = RenameClockDomains(Inout(self.serdes),
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{"rio_phy": "sys",
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"rio": "sys"})
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def check_input(self, selfp, stb, fine_ts=None):
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if stb != selfp.io.rtlink.i.stb:
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if stb != selfp.dut.rtlink.i.stb:
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print("KO rtlink.i.stb should be {} but is {}"
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.format(stb, selfp.io.rtlink.i.stb))
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elif fine_ts is not None and fine_ts != selfp.io.rtlink.i.fine_ts:
|
||||
.format(stb, selfp.dut.rtlink.i.stb))
|
||||
elif fine_ts is not None and fine_ts != selfp.dut.rtlink.i.fine_ts:
|
||||
print("KO rtlink.i.fine_ts should be {} but is {}"
|
||||
.format(fine_ts, selfp.io.rtlink.i.fine_ts))
|
||||
.format(fine_ts, selfp.dut.rtlink.i.fine_ts))
|
||||
else:
|
||||
print("OK")
|
||||
|
||||
def check_output(self, selfp, data):
|
||||
if selfp.io.io.o != data:
|
||||
print("KO io.o should be {} but is {}".format(data, selfp.io.io.o))
|
||||
if selfp.serdes.o != data:
|
||||
print("KO io.o should be {} but is {}".format(data, selfp.serdes.o))
|
||||
else:
|
||||
print("OK")
|
||||
|
||||
def check_output_enable(self, selfp, oe):
|
||||
if selfp.io.io.oe != oe:
|
||||
print("KO io.oe should be {} but is {}".format(oe, selfp.io.io.oe))
|
||||
if selfp.serdes.oe != oe:
|
||||
print("KO io.oe should be {} but is {}".format(oe, selfp.serdes.oe))
|
||||
else:
|
||||
print("OK")
|
||||
|
||||
def gen_simulation(self, selfp):
|
||||
selfp.io.sensitivity = 0b11 # rising + falling
|
||||
selfp.dut.rtlink.o.address = 2
|
||||
selfp.dut.rtlink.o.data = 0b11
|
||||
selfp.dut.rtlink.o.stb = 1 # set sensitivity to rising + falling
|
||||
yield
|
||||
selfp.dut.rtlink.o.stb = 0
|
||||
|
||||
self.check_output_enable(selfp, 0)
|
||||
yield
|
||||
selfp.io.io.i = 0b11111110 # rising edge at fine_ts = 1
|
||||
|
||||
selfp.serdes.i = 0b11111110 # rising edge at fine_ts = 1
|
||||
yield
|
||||
selfp.serdes.i = 0b11111111
|
||||
yield
|
||||
self.check_input(selfp, stb=1, fine_ts=1)
|
||||
selfp.io.io.i = 0b01111111 # falling edge at fine_ts = 7
|
||||
|
||||
selfp.serdes.i = 0b01111111 # falling edge at fine_ts = 7
|
||||
yield
|
||||
selfp.serdes.i = 0b00000000
|
||||
yield
|
||||
self.check_input(selfp, stb=1, fine_ts=7)
|
||||
selfp.io.io.i = 0b11000000 # rising edge at fine_ts = 6
|
||||
|
||||
selfp.serdes.i = 0b11000000 # rising edge at fine_ts = 6
|
||||
yield
|
||||
selfp.serdes.i = 0b11111111
|
||||
yield
|
||||
self.check_input(selfp, stb=1, fine_ts=6)
|
||||
selfp.io.sensitivity = 0b01 # rising
|
||||
selfp.io.io.i = 0b00001111 # falling edge at fine_ts = 4
|
||||
|
||||
selfp.dut.rtlink.o.address = 2
|
||||
selfp.dut.rtlink.o.data = 0b11
|
||||
selfp.dut.rtlink.o.stb = 1 # set sensitivity to rising only
|
||||
yield
|
||||
selfp.dut.rtlink.o.stb = 0
|
||||
yield
|
||||
|
||||
selfp.serdes.i = 0b00001111 # falling edge at fine_ts = 4
|
||||
yield
|
||||
self.check_input(selfp, stb=0) # no strobe, sensitivity is rising edge
|
||||
selfp.io.io.i = 0b11110000 # rising edge at fine_ts = 4
|
||||
|
||||
selfp.serdes.i = 0b11110000 # rising edge at fine_ts = 4
|
||||
yield
|
||||
self.check_input(selfp, stb=1, fine_ts=4)
|
||||
selfp.io.rtlink.o.address = 1
|
||||
selfp.io.rtlink.o.data = 1
|
||||
selfp.io.rtlink.o.stb = 1 # set Output Enable to 1
|
||||
|
||||
selfp.dut.rtlink.o.address = 1
|
||||
selfp.dut.rtlink.o.data = 1
|
||||
selfp.dut.rtlink.o.stb = 1 # set Output Enable to 1
|
||||
yield
|
||||
selfp.dut.rtlink.o.stb = 0
|
||||
yield
|
||||
selfp.io.rtlink.o.address = 0
|
||||
selfp.io.rtlink.o.data = 1
|
||||
selfp.io.rtlink.o.fine_ts = 3 # rising edge at fine_ts = 3
|
||||
yield
|
||||
self.check_output_enable(selfp, 1)
|
||||
|
||||
selfp.dut.rtlink.o.address = 0
|
||||
selfp.dut.rtlink.o.data = 1
|
||||
selfp.dut.rtlink.o.fine_ts = 3
|
||||
selfp.dut.rtlink.o.stb = 1 # rising edge at fine_ts = 3
|
||||
yield
|
||||
selfp.dut.rtlink.o.stb = 0
|
||||
yield
|
||||
selfp.io.rtlink.o.data = 0
|
||||
selfp.io.rtlink.o.fine_ts = 0 # falling edge at fine_ts = 0
|
||||
self.check_output(selfp, data=0b11111000)
|
||||
|
||||
yield
|
||||
self.check_output(selfp, data=0xFF) # stays at 1
|
||||
|
||||
selfp.dut.rtlink.o.data = 0
|
||||
selfp.dut.rtlink.o.fine_ts = 0
|
||||
selfp.dut.rtlink.o.stb = 1 # falling edge at fine_ts = 0
|
||||
yield
|
||||
selfp.io.rtlink.o.data = 1
|
||||
selfp.io.rtlink.o.fine_ts = 7
|
||||
self.check_output(selfp, data=0)
|
||||
selfp.dut.rtlink.o.stb = 0
|
||||
yield
|
||||
self.check_output(selfp, data=0)
|
||||
|
||||
yield
|
||||
self.check_output(selfp, data=0)
|
||||
|
||||
selfp.dut.rtlink.o.data = 1
|
||||
selfp.dut.rtlink.o.fine_ts = 7
|
||||
selfp.dut.rtlink.o.stb = 1 # rising edge at fine_ts = 7
|
||||
yield
|
||||
selfp.dut.rtlink.o.stb = 0
|
||||
yield
|
||||
self.check_output(selfp, data=0b10000000)
|
||||
while True:
|
||||
yield
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
import sys
|
||||
from migen.sim.generic import Simulator, TopLevel
|
||||
from migen.sim import icarus
|
||||
|
||||
if len(sys.argv) <= 1:
|
||||
print("You should run this script with either InoutTB() or OutputTB() "
|
||||
"arg")
|
||||
if len(sys.argv) != 2:
|
||||
print("Incorrect command line")
|
||||
sys.exit(1)
|
||||
|
||||
with Simulator(eval(sys.argv[1]), TopLevel("top.vcd", clk_period=int(1/0.125)),
|
||||
icarus.Runner(keep_files=False,)) as s:
|
||||
s.run(200)
|
||||
cls = {
|
||||
"output": _OutputTB,
|
||||
"inout": _InoutTB
|
||||
}[sys.argv[1]]
|
||||
|
||||
with Simulator(cls(), TopLevel("top.vcd", clk_period=int(1/0.125))) as s:
|
||||
s.run()
|
||||
|
|
|
|||
Loading…
Reference in New Issue