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uart: COBS decoder working with both irritators

This commit is contained in:
Fischer Moseley 2026-03-05 10:21:03 -07:00
parent f47a415692
commit 0e22a8d563
2 changed files with 4 additions and 4 deletions
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2
src/manta/uart/cobs_decode.py
View File

@ -69,7 +69,7 @@ class COBSDecode(wiring.Component):
m.d.comb += [
self.source.data.eq(fifo.r_data),
self.source.valid.eq(fifo.r_rdy),
self.source.valid.eq(fifo.r_rdy & (fsm.ongoing("IDLE") | (fifo.r_level > 1))),
self.source.last.eq(fsm.ongoing("IDLE") & self.source.valid & (fifo.r_level == 1)),
fifo.r_en.eq(self.source.valid & self.source.ready),
]

6
test/test_cobs_decode.py
View File

@ -36,7 +36,7 @@ async def test_cobs_decode_static(ctx):
]
for data in testcases:
await decode_and_compare(ctx, data, tx_irritate=False, rx_irritate=False)
await decode_and_compare(ctx, data, tx_irritate=True, rx_irritate=True)
async def decode(ctx, data, tx_irritate, rx_irritate):
@ -54,11 +54,11 @@ async def decode(ctx, data, tx_irritate, rx_irritate):
# Feed data to decoder
tx_stall = random.randint(0, 1) if tx_irritate else False
if tx_done:
if tx_done or tx_stall:
ctx.set(cd.sink.data, 0)
ctx.set(cd.sink.valid, 0)
elif not tx_stall:
else:
ctx.set(cd.sink.valid, 1)
ctx.set(cd.sink.data, data[tx_index])