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serdes-transceiver
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observe bit error

master
occheung 2023-04-26 08:03:47 +08:00
parent 950d9ee8be
commit 8bfd229bbe
4 changed files with 25 additions and 20 deletions
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4
default.nix
View File

@ -7,8 +7,8 @@ let
src = pkgs.fetchFromGitHub {
owner = "m-labs";
repo = "migen";
rev = "7bc4eb1387b39159a74c1dbd1b820728e0bfbbaa";
sha256 = "039jk8y7f0vhr32svg3nd23i88c0bhws8ngxwk9bdznfxvhiy1h6";
rev = "ccaee68e14d3636e1d8fb2e0864dd89b1b1f7384";
sha256 = "sha256-oYdeY0MbTReKbAwmSznnqw0wNawdInJoFJVWW3tesFA=";
fetchSubmodules = true;
};

29
multi_serdes_loopback.py
View File

@ -77,15 +77,6 @@ class MultiSerDesLoopBack(Module):
)
self.rx_fsm.act("SAMPLE_RXDATA",
# If((sample_idx != 0) | (self.rx.rxdata != 0),
# If(sample_idx == 15,
# NextValue(sample_idx, 0),
# NextState("WRITE_PATTERN_FIRST_UPPER"),
# ).Else(
# NextValue(sampled_rxdata[sample_idx], self.rx.rxdata),
# NextValue(sample_idx, sample_idx + 1),
# ),
# ),
If(sample_idx == 15,
NextValue(sample_idx, 0),
NextState("WRITE_PATTERN_FIRST_UPPER"),
@ -162,15 +153,31 @@ class MultiSerDesLoopBack(Module):
self.tx_fsm.act("WAIT_GROUP_ALIGN",
self.tx.txdata.eq(0),
If(self.rx.delay_done,
NextState("SEND_ARB_DATA"),
NextState("SEND_ARB_DATA1"),
),
)
self.tx_fsm.act("SEND_ARB_DATA",
self.tx_fsm.act("SEND_ARB_DATA1",
self.tx.txdata.eq(0b00111001110011100111),
NextState("SEND_ARB_DATA2"),
)
self.tx_fsm.act("SEND_ARB_DATA2",
self.tx.txdata.eq(0),
NextState("SEND_ARB_DATA3"),
)
self.tx_fsm.act("SEND_ARB_DATA3",
self.tx.txdata.eq(0xDEADB),
NextState("SEND_ARB_DATA4"),
)
self.tx_fsm.act("SEND_ARB_DATA4",
self.tx.txdata.eq(0xBCAFE),
NextState("TERMINATE"),
)
self.tx_fsm.act("TERMINATE",
self.tx.txdata.eq(0),
NextState("TERMINATE"),

2
single_serdes_loopback.py
View File

@ -473,7 +473,7 @@ if __name__ == "__main__":
platform = kasli.Platform(hw_rev="v2.0")
# Generate pads for the I/O blocks
eem = 2
eem = 1
generate_pads(platform, eem)
pad = platform.request("dio{}".format(eem), 0)

10
sync_serdes.py
View File

@ -208,7 +208,7 @@ class SlaveAligner(Module):
self.master_bitslip = Signal()
self.slave_bitslip = Signal()
self.slip_count = Signal(3)
slip_count = Signal(3)
check_odd = Signal()
check_even = Signal()
@ -219,8 +219,6 @@ class SlaveAligner(Module):
fsm.act("WAIT_START",
If(self.start,
NextState("WAIT_TIMER"),
).Else(
NextState("WAIT_START"),
)
)
@ -243,7 +241,7 @@ class SlaveAligner(Module):
NextValue(check_even, self.loopback_rxdata[0]),
NextState("CHECK_MASTER_BITSLIP"),
).Else(
NextValue(self.slip_count, self.slip_count + 1),
NextValue(slip_count, slip_count + 1),
NextState("HIGH_BITSLIP_FIRST"),
)
)
@ -265,7 +263,7 @@ class SlaveAligner(Module):
fsm.act("HIGH_BITSLIP_SECOND",
self.master_bitslip.eq(1),
self.slave_bitslip.eq(1),
If(self.slip_count == 5,
If(slip_count == 5,
NextState("SHIFT_WAIT_TIMER"),
).Else(
NextState("WAIT_TIMER"),
@ -322,7 +320,7 @@ class SlaveAligner(Module):
)
fsm.act("SHIFT_SAMPLE_PATTERN",
If((self.loopback_rxdata[3:4] != 0) & ~self.loopback_rxdata[5],
If((self.loopback_rxdata[3:5] != 0) & ~self.loopback_rxdata[5],
NextState("TERMINATE"),
).Else(
NextState("SHIFT_HIGH_BITSLIP_FIRST"),