grabber: complete RTIO PHY, untested

This commit is contained in:
Sebastien Bourdeauducq 2018-07-21 13:25:47 +08:00
parent e3ba4b9516
commit 031de58d21
1 changed files with 79 additions and 5 deletions

View File

@ -1,20 +1,94 @@
from migen import *
from migen.genlib.cdc import MultiReg, PulseSynchronizer
from migen.genlib.fsm import FSM
from artiq.gateware.rtio import rtlink
from artiq.gateware.grabber import deserializer_7series
from artiq.gateware.grabber.core import *
__all__ = ["Grabber"]
class Synchronizer(Module):
def __init__(self, roi_engines):
counts_in = [roi_engine.out.count for roi_engine in roi_engines]
# This assumes all ROI engines update at the same time.
self.update = Signal()
# stays valid until the next frame after self.update is pulsed.
self.counts = [Signal.like(count) for count in counts_in]
# # #
for count in counts_in:
count.attr.add("no_retiming")
counts_rtio = [Signal.like(count) for count in counts_in]
self.specials += [MultiReg(i, o, "rtio") for i, o in zip(counts_in, self.counts)]
ps = PulseSynchronizer("cl", "rtio")
self.submodules += ps
self.comb += ps.i.eq(roi_engines[0].out.update)
self.sync.rtio += self.update.eq(ps.o)
class Serializer(Module):
def __init__(self, update, counts, rtlink_i):
self.gate = Signal(len(counts))
# # #
gate = Signal(len(counts))
sentinel = 2**(len(rtlink_i.data) - 1)
fsm = ClockDomainsRenamer("rio")(FSM())
self.submodules += fsm
fsm.act("INIT",
rtlink_i.data.eq(sentinel),
If(update & (self.gate != 0),
NextValue(gate, self.gate),
rtlink_i.stb.eq(1),
NextState(0)
)
)
for n, count in enumerate(counts):
last = n == len(counts)-1
fsm.act(n,
rtlink_i.data.eq(count),
rtlink_i.stb.eq(gate[n]),
NextState("INIT" if last else n+1)
)
class Grabber(Module):
def __init__(self, pins):
self.config = rtlink.Interface(rtlink.OInterface(10))
self.gate_data = rtlink.Interface(rtlink.OInterface(1),
rtlink.IInterface(10))
def __init__(self, pins, roi_engine_count=16, res_width=12, count_shift=0):
self.config = rtlink.Interface(
rtlink.OInterface(res_width,
bits_for(4*roi_engine_count-1)))
self.gate_data = rtlink.Interface(
rtlink.OInterface(roi_engine_count),
rtlink.IInterface(1+ROI.count_len(res_width, count_shift),
timestamped=False))
self.submodules.deserializer = deserializer_7series.Deserializer(pins)
self.submodules.frequency_counter = FrequencyCounter()
self.submodules.parser = Parser()
self.submodules.parser = Parser(res_width)
self.comb += self.parser.cl.eq(self.deserializer.q)
self.roi_engines = [ROI(self.parser.pix, count_shift) for _ in range(roi_engine_count)]
self.submodules += self.roi_engines
self.submodules.synchronizer = Synchronizer(self.roi_engines)
self.submodules.serializer = Serializer(self.synchronizer.update, self.synchronizer.counts,
self.gate_data.i)
for n, roi_engine in enumerate(self.roi_engines):
for offset, target in enumerate([roi_engine.cfg.x0, roi_engine.cfg.x1,
roi_engine.cfg.y0, roi_engine.cfg.y1]):
self.sync.rtio += If(self.config.o.stb & (self.config.o.address == 4*n+offset),
target.eq(self.config.o.data))
self.sync.rio += If(self.gate_data.o.stb,
self.serializer.gate.eq(self.gate_data.o.data))
def get_csrs(self):
return (