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uwwvb: Improve checking of marks & zeros.

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Signed-off-by: Jeff Epler <jepler@gmail.com>
This commit is contained in:
Jeff Epler 2025-08-27 11:45:11 -05:00
parent 54d0b4f0f2
commit 9f26e319da
1 changed files with 11 additions and 4 deletions
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15
src/uwwvb.py
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@ -99,10 +99,17 @@ def decode_wwvb(
"""Convert a received minute of wwvb symbols to a WWVBMinute. Returns None if any error is detected."""
if not t:
return None
if not all(t[i] == MARK for i in always_mark):
return None
if not all(t[i] == ZERO for i in always_zero):
return None
for i in range(len(t)):
is_mark: bool = t[i] == MARK
is_zero: bool = t[i] == ZERO
expect_mark = i in always_mark or i == 60
expect_zero = i in always_zero
if expect_mark != is_mark:
return None
if expect_zero and not is_zero:
return None
# Checking redundant DUT1 sign bits
if t[36] == t[37]:
return None