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36 lines
1.2 KiB
Python
36 lines
1.2 KiB
Python
"""Protocol error reporting for satellites."""
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from migen import *
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from migen.genlib.cdc import PulseSynchronizer
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from misoc.interconnect.csr import *
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class RTErrorsSatellite(Module, AutoCSR):
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def __init__(self, rt_packet, ios):
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self.protocol_error = CSR(4)
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self.rtio_error = CSR(2)
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def error_csr(csr, *sources):
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for n, source in enumerate(sources):
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pending = Signal(related=source)
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ps = PulseSynchronizer("rtio", "sys")
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self.submodules += ps
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self.comb += ps.i.eq(source)
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self.sync += [
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If(csr.re & csr.r[n], pending.eq(0)),
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If(ps.o, pending.eq(1))
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]
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self.comb += csr.w[n].eq(pending)
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# The master is normally responsible for avoiding output overflows and
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# output underflows.
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# Error reports here are only for diagnosing internal ARTIQ bugs.
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error_csr(self.protocol_error,
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rt_packet.unknown_packet_type,
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rt_packet.packet_truncated,
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ios.write_underflow,
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ios.write_overflow)
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error_csr(self.rtio_error,
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ios.collision,
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ios.busy)
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