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fastlink: fix fastino style link

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This commit is contained in:
Robert Jördens 2020-10-18 22:27:05 +02:00
parent d98357051c
commit 30d1acee9f
2 changed files with 7 additions and 14 deletions
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9
artiq/gateware/rtio/phy/fastlink.py
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@ -74,9 +74,8 @@ class SerDes(Module):
# big shift register for mosi and
sr = [Signal(t_frame, reset_less=True) for i in range(n_mosi)]
assert len(Cat(sr)) == len(words)
crc_insert = ([d[1] for d in self.data[:-1]] +
[d[0] for d in self.data[:-1]])
crc_insert = Cat(crc_insert[-n_crc:])
crc_insert = Cat(([d[0] for d in self.data[1:-1]] +
[d[1] for d in self.data[1:-1]])[:n_crc])
miso_sr = Signal(t_frame, reset_less=True)
miso_sr_next = Signal.like(miso_sr)
self.comb += [
@ -106,8 +105,8 @@ class SerDes(Module):
# transpose, load
[sri.eq(Cat(words[i::n_mosi])) for i, sri in enumerate(sr)],
# inject crc for the last cycle
crc_insert.eq(self.crca.next if n_crc // n_mosi == 1
else self.crcb.next),
crc_insert.eq(self.crca.next if n_crc // n_mosi <= 1
else self.crca.last),
),
]

12
artiq/gateware/test/rtio/test_fastlink.py
View File

@ -36,8 +36,7 @@ class TestPhaser(unittest.TestCase):
frame = []
self.dut.comb += self.dut.payload.eq((1 << len(self.dut.payload)) - 1)
run_simulation(self.dut, self.record_frame(frame),
clocks={n: 2 for n in ["sys", "rio", "rio_phy"]},
vcd_name="fastlink.vcd")
clocks={n: 2 for n in ["sys", "rio", "rio_phy"]})
self.assertEqual(len(frame), 8*10//2)
self.assertEqual([d[0] for d in frame], [0, 0, 3, 3] * 10)
self.assertEqual([d[1] & 1 for d in frame[4*4 - 1:10*4 - 1:4]],
@ -79,12 +78,7 @@ class TestFastino(unittest.TestCase):
frame = []
self.dut.comb += self.dut.payload.eq((1 << len(self.dut.payload)) - 1)
run_simulation(self.dut, self.record_frame(frame),
clocks={n: 2 for n in ["sys", "rio", "rio_phy"]},
vcd_name="fastlink.vcd")
clocks={n: 2 for n in ["sys", "rio", "rio_phy"]})
self.assertEqual(len(frame), 7*14//2)
self.assertEqual([d[0] for d in frame], [3, 0, 1, 3, 2, 0, 3] * 7)
self.assertEqual(ref, frame)
print(frame)
ref = [[3, 3, 3, 3, 3, 3, 3, 0], [0, 3, 3, 3, 3, 3, 3, 0], [1, 3, 3, 3, 3, 3, 3, 0], [3, 3, 3, 3, 3, 3, 3, 0], [2, 3, 3, 3, 3, 3, 3, 0], [0, 3, 3, 3, 3, 3, 3, 0], [3, 3, 3, 3, 3, 3, 3, 0], [3, 3, 3, 3, 3, 3, 3, 0], [0, 3, 3, 3, 3, 3, 3, 0], [1, 3, 3, 3, 3, 3, 3, 0], [3, 3, 3, 3, 3, 3, 3, 0], [2, 3, 3, 3, 3, 3, 3, 0], [0, 3, 3, 3, 3, 3, 3, 0], [3, 3, 3, 3, 3, 3, 3, 0], [3, 3, 3, 3, 3, 3, 3, 0], [0, 3, 3, 3, 3, 3, 3, 0], [1, 3, 3, 3, 3, 3, 3, 0], [3, 3, 3, 3, 3, 3, 3, 0], [2, 3, 3, 3, 3, 3, 3, 0], [0, 3, 3, 3, 3, 3, 3, 0], [3, 2, 3, 3, 3, 3, 3, 0], [3, 3, 3, 3, 3, 3, 3, 0], [0, 3, 3, 3, 3, 3, 3, 0], [1, 3, 3, 3, 3, 3, 3, 0], [3, 1, 3, 3, 3, 3, 3, 0], [2, 3, 3, 3, 3, 3, 3, 0], [0, 3, 3, 3, 3, 3, 3, 0], [3, 2, 3, 3, 3, 3, 3, 0], [3, 3, 3, 3, 3, 3, 3, 0], [0, 3, 3, 3, 3, 3, 3, 0], [1, 3, 3, 3, 3, 3, 3, 0], [3, 1, 3, 3, 3, 3, 3, 0], [2, 3, 3, 3, 3, 3, 3, 0], [0, 3, 3, 3, 3, 3, 3, 0], [3, 2, 3, 3, 3, 3, 3, 0], [3, 3, 3, 3, 3, 3, 3, 0], [0, 3, 3, 3, 3, 3, 3, 0], [1, 3, 3, 3, 3, 3, 3, 0], [3, 1, 3, 3, 3, 3, 3, 0], [2, 3, 3, 3, 3, 3, 3, 0], [0, 3, 3, 3, 3, 3, 3, 0], [3, 2, 3, 3, 3, 3, 3, 0], [3, 3, 3, 3, 3, 3, 3, 0], [0, 3, 3, 3, 3, 3, 3, 0], [1, 3, 3, 3, 3, 3, 3, 0], [3, 3, 3, 3, 3, 3, 3, 0], [2, 3, 3, 3, 3, 3, 3, 0], [0, 3, 3, 3, 3, 3, 3, 0], [3, 3, 1, 1, 1, 2, 1, 0]]
self.assertEqual(frame[-1], [3, 3, 1, 1, 1, 2, 1, 0]) # crc12