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M17: Demodulator: force unlock on EOT frame 

Signed-off-by: Silvano Seva <silseva@fastwebnet.it>
This commit is contained in:
Silvano Seva 2025-10-31 22:12:53 +01:00
parent b763d6456f
commit 79d2e9a27e
1 changed files with 5 additions and 2 deletions
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7
openrtx/src/protocols/M17/M17Demodulator.cpp
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@ -403,13 +403,16 @@ void M17Demodulator::syncUpdateState()
uint8_t streamHd = hammingDistance((*demodFrame)[0], STREAM_SYNC_WORD[0]) uint8_t streamHd = hammingDistance((*demodFrame)[0], STREAM_SYNC_WORD[0])
+ hammingDistance((*demodFrame)[1], STREAM_SYNC_WORD[1]); + hammingDistance((*demodFrame)[1], STREAM_SYNC_WORD[1]);
uint8_t eotHd = hammingDistance((*demodFrame)[0], EOT_SYNC_WORD[0])
+ hammingDistance((*demodFrame)[1], EOT_SYNC_WORD[1]);
if(streamHd <= 1) if(streamHd <= 1)
missedSyncs = 0; missedSyncs = 0;
else else
missedSyncs += 1; missedSyncs += 1;
// The lock is lost after four consecutive sync misses. // The lock is lost after four consecutive sync misses or an EOT frame.
if(missedSyncs > 4) if((missedSyncs > 4) || (eotHd <= 1))
demodState = DemodState::UNLOCKED; demodState = DemodState::UNLOCKED;
else else
demodState = DemodState::LOCKED; demodState = DemodState::LOCKED;