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cxp pipeline: refactor Trigger ack to use code_src

This commit is contained in:
morgan 2024-09-03 12:21:32 +08:00
parent ad84345553
commit 354de66337
1 changed files with 10 additions and 51 deletions
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61
src/gateware/cxp_pipeline.py
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@ -53,59 +53,23 @@ class Trigger_ACK(Module):
def __init__(self, layout):
self.ack = Signal()
self.source = stream.Endpoint(layout)
# # #
# Section 9.3.2 (CXP-001-2021)
# Send 4x K28.6 and 4x 0x01 as trigger packet ack
self.submodules.code_src = code_src = Code_Source(layout)
self.submodules.k_code_inserter = k_code_inserter = Code_Inserter(layout)
self.comb += [
code_src.stb.eq(self.ack),
code_src.data.eq(0x01),
code_src.k.eq(0),
k_code_inserter.data.eq(K(28, 6)),
k_code_inserter.k.eq(1),
cnt = Signal(max=4)
clr_cnt = Signal()
inc_cnt = Signal()
self.sync += [
If(clr_cnt,
cnt.eq(cnt.reset),
).Elif(inc_cnt,
cnt.eq(cnt + 1),
)
code_src.source.connect(k_code_inserter.sink)
]
self.submodules.fsm = fsm = FSM(reset_state="IDLE")
fsm.act("IDLE",
clr_cnt.eq(1),
If(self.ack,
NextState("WRITE_ACK0")
)
)
fsm.act("WRITE_ACK0",
self.source.stb.eq(1),
self.source.data.eq(K(28, 6)),
self.source.k.eq(1),
If(cnt == 3,
clr_cnt.eq(1),
If(self.source.ack, NextState("WRITE_ACK1"))
).Else(
inc_cnt.eq(self.source.ack)
)
)
fsm.act("WRITE_ACK1",
self.source.stb.eq(1),
self.source.data.eq(0x01),
self.source.k.eq(0),
If(cnt == 3,
self.source.eop.eq(1),
If(self.source.ack, NextState("IDLE"))
).Else(
inc_cnt.eq(self.source.ack)
)
)
self.source = k_code_inserter.source
class Code_Inserter(Module):
def __init__(self, layout, insert_infront=True, counts=4):
@ -116,12 +80,8 @@ class Code_Inserter(Module):
self.k = Signal.like(sink.k)
# # #
assert counts > 0
# TODO: make this cleaner
# FIX this to make it work for counts = 1
cnt = Signal() if counts == 1 else Signal(max=counts)
clr_cnt = Signal()
inc_cnt = Signal()
@ -214,7 +174,6 @@ class Packet_Wrapper(Module):
pak_start.source.connect(pak_end.sink),
]
@ResetInserter()
@CEInserter()
class CXPCRC32(Module):