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Fixed bug in M17 demodulator causing it to sometimes take more than 20ms to process a block of baseband samples when, in unlocked state, a valid syncword is searched.

This commit is contained in:
Silvano Seva 2022-10-19 08:29:53 +02:00
parent c6a40a9625
commit f24699f14e
1 changed files with 7 additions and 2 deletions
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9
openrtx/src/protocols/M17/M17Demodulator.cpp
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@ -523,10 +523,15 @@ bool M17Demodulator::update()
if ((hammingSync > maxHamming) && (hammingLsf > maxHamming)) if ((hammingSync > maxHamming) && (hammingLsf > maxHamming))
{ {
// Lock lost // Lock lost, reset demodulator alignment (phase) only
// if we were locked on a valid signal.
// This to avoid, in case of absence of carrier, to fall
// in a loop where the demodulator continues to search
// for the syncword in the same block of samples, causing
// the update function to take more than 20ms to complete.
if(locked) phase = 0;
syncDetected = false; syncDetected = false;
locked = false; locked = false;
phase = 0;
#ifdef ENABLE_DEMOD_LOG #ifdef ENABLE_DEMOD_LOG
// Pre-arm the log trigger. // Pre-arm the log trigger.