artiq/artiq/gateware/rtio/moninj.py

69 lines
2.7 KiB
Python

from migen import *
from migen.genlib.cdc import BusSynchronizer, MultiReg
from misoc.interconnect.csr import *
class Monitor(Module, AutoCSR):
def __init__(self, channels):
chan_probes = [c.probes for c in channels]
max_chan_probes = max(len(cp) for cp in chan_probes)
max_probe_len = max(len(p) for cp in chan_probes for p in cp)
self.chan_sel = CSRStorage(bits_for(len(chan_probes)-1))
self.probe_sel = CSRStorage(bits_for(max_chan_probes-1))
self.value_update = CSR()
self.value = CSRStatus(max_probe_len)
# # #
chan_probes_sys = []
for cp in chan_probes:
cp_sys = []
for p in cp:
vs = BusSynchronizer(len(p), "rio", "sys")
self.submodules += vs
self.comb += vs.i.eq(p)
cp_sys.append(vs.o)
cp_sys += [0]*(max_chan_probes-len(cp))
chan_probes_sys.append(Array(cp_sys)[self.probe_sel.storage])
self.sync += If(self.value_update.re,
self.value.status.eq(
Array(chan_probes_sys)[self.chan_sel.storage]))
class Injector(Module, AutoCSR):
def __init__(self, channels):
chan_overrides = [c.overrides for c in channels]
max_chan_overrides = max(len(co) for co in chan_overrides)
max_override_len = max(len(o) for co in chan_overrides for o in co)
self.chan_sel = CSRStorage(bits_for(len(chan_overrides)-1))
self.override_sel = CSRStorage(bits_for(max_chan_overrides-1))
self.value = CSR(max_override_len)
# # #
chan_overrides_sys = []
for n_channel, co in enumerate(chan_overrides):
co_sys = []
for n_override, o in enumerate(co):
# We do the clock domain transfer with a simple double-latch.
# Software has to ensure proper timing of any strobe signal etc.
# to avoid problematic glitches.
o_sys = Signal.like(o)
self.specials += MultiReg(o_sys, o, "rio")
self.sync += If(self.value.re & (self.chan_sel.storage == n_channel)
& (self.override_sel.storage == n_override),
o_sys.eq(self.value.r))
co_sys.append(o_sys)
co_sys += [0]*(max_chan_overrides-len(co))
chan_overrides_sys.append(Array(co_sys)[self.override_sel.storage])
self.comb += self.value.w.eq(
Array(chan_overrides_sys)[self.chan_sel.storage])
class MonInj(Module, AutoCSR):
def __init__(self, channels):
self.submodules.mon = Monitor(channels)
self.submodules.inj = Injector(channels)