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Treat zero-or-missing signal levels as "no information" and don't include them in RSSI.

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This commit is contained in:
Oliver Jowett 2016-02-24 11:51:45 +00:00
parent f7c9aed8b0
commit 214bc0e587
3 changed files with 19 additions and 9 deletions
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9
track.c
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@ -66,8 +66,8 @@ struct aircraft *trackCreateAircraft(struct modesMessage *mm) {
// Now initialise things that should not be 0/NULL to their defaults
a->addr = mm->addr;
for (i = 0; i < 8; ++i)
a->signalLevel[i] = mm->signalLevel; // First time, initialise everything
// to the first signal strength
a->signalLevel[i] = 1e-5;
a->signalNext = 0;
// mm->msgtype 32 is used to represent Mode A/C. These values can never change, so
// set them once here during initialisation, and don't bother to set them every
@ -478,7 +478,10 @@ struct aircraft *trackUpdateFromMessage(struct modesMessage *mm)
Modes.aircrafts = a;
}
a->signalLevel[a->messages & 7] = mm->signalLevel;// replace the 8th oldest signal strength
if (mm->signalLevel > 0) {
a->signalLevel[a->signalNext] = mm->signalLevel;
a->signalNext = (a->signalNext + 1) & 7;
}
a->seen = now;
a->messages++;