void LinkRaw::HandleEnergyScanTask(void)
{
// Only process task if we are still energy scanning
if (mTimerReason == kTimerReasonEnergyScanComplete)
{
int8_t rssi = otPlatRadioGetRssi(&mInstance);
// Only apply the RSSI if it was a valid value
if (rssi != kInvalidRssiValue)
{
if ((mEnergyScanRssi == kInvalidRssiValue) || (rssi > mEnergyScanRssi))
{
mEnergyScanRssi = rssi;
}
}
// Post another instance of tha task, since we are
// still doing the energy scan.
mEnergyScanTask.Post();
}
}
void JamDetector::HandleTimer(void)
{
int8_t rssi;
bool didExceedThreshold = true;
VerifyOrExit(mEnabled);
rssi = otPlatRadioGetRssi(&GetInstance());
// If the RSSI is valid, check if it exceeds the threshold
// and try to update the history bit map
if (rssi != OT_RADIO_RSSI_INVALID)
{
didExceedThreshold = (rssi >= mRssiThreshold);
UpdateHistory(didExceedThreshold);
}
// If the RSSI sample does not exceed the threshold, go back to max sample interval
// Otherwise, divide the sample interval by half while ensuring it does not go lower
// than minimum sample interval.
if (!didExceedThreshold)
{
mSampleInterval = kMaxSampleInterval;
}
else
{
mSampleInterval /= 2;
if (mSampleInterval < kMinSampleInterval)
{
mSampleInterval = kMinSampleInterval;
}
}
mTimer.Start(mSampleInterval + Random::GetUint32InRange(0, kMaxRandomDelay));
exit:
return;
}
