34 lines
1.1 KiB
Python
34 lines
1.1 KiB
Python
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from collections import OrderedDict
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from liteeth.common import *
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from liteeth.generic.arbiter import Arbiter
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from liteeth.generic.dispatcher import Dispatcher
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from liteeth.core.udp.common import *
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class LiteEthUDPCrossbar(Module):
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def __init__(self):
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self.users = OrderedDict()
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self.master = LiteEthUDPMasterPort(8)
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def get_port(self, udp_port):
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port = LiteEthUDPUserPort(8)
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if udp_port in self.users.keys():
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raise ValueError("Port {0:#x} already assigned".format(udp_port))
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self.users[udp_port] = port
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return port
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def do_finalize(self):
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# TX arbitrate
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sinks = [port.sink for port in self.users.values()]
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self.submodules.udp_arbiter = Arbiter(sinks, self.master.source)
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# RX dispatch
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sources = [port.source for port in self.users.values()]
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self.submodules.udp_dispatcher = Dispatcher(self.master.sink, sources, one_hot=True)
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cases = {}
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cases["default"] = self.udp_dispatcher.sel.eq(0)
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for i, (k, v) in enumerate(self.users.items()):
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cases[k] = self.udp_dispatcher.sel.eq(2**i)
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self.comb += \
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Case(self.master.sink.dst_port, cases)
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