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Transceiver tweak

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This commit is contained in:
Peter Antypas 2020-10-08 13:26:24 -07:00
parent 25a21b65e5
commit aeb42d15ec
1 changed files with 10 additions and 7 deletions
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17
latest/Firmware/Src/Transceiver.cpp
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@ -201,8 +201,11 @@ void Transceiver::onBitClock()
- The RSSI is within 6dB of the noise floor for this channel
- It's been at least MIN_TX_INTERVAL seconds since our last transmission
After PCB revision 2.0:
With PCB revision 2.0 to 4.x:
- No TX packets are queued if the supercapacitor is not charged, so no need to check here.
With PCB revision >= 5.x:
- There is no supercapacitor anymore
*/
if ( mUTC && mTXPacket && mSlotBitNumber == CCA_SLOT_BIT+1 && mTXPacket && mTXPacket->channel() == mChannel )
@ -211,14 +214,13 @@ void Transceiver::onBitClock()
if ( it != mNoiseFloorCache.end() )
{
uint8_t noiseFloor = it->second;
if ( mRXPacket.rssi() < noiseFloor + TX_CCA_HEADROOM )
if ( mRXPacket.rssi() <= noiseFloor + TX_CCA_HEADROOM )
{
if ( mUTC - mTXPacket->timestamp() > MIN_MSG_18_TX_INTERVAL )
if ( mUTC - mTXPacket->timestamp() >= MIN_MSG_18_TX_INTERVAL )
{
// The packet is way too old. Discard it.
TXPacketPool::instance().deleteTXPacket(mTXPacket);
mTXPacket = NULL;
//printf2("Transceiver discarded aged TX packet\r\n");
}
else if ( mUTC - mLastTXTime >= MIN_TX_INTERVAL )
{
@ -258,9 +260,10 @@ void Transceiver::onBitClock()
* As of September 2020, the digital ramp-down of the Si4463 is broken and not
* in the latest firmware patch either, so this is a good alternative:
*
* We're assuming the packet has 2-3 ramp down bits, so when it tells us it's done,
* we start ramping the PA down as the transmission ends. There is an RC delay circuit
* on the PA bias voltage rail, so it won't "crash" hard. This really helped clean up spurs.
* The packet has 2-3 ramp down bits, so when it tells us it's reached them,
* we ramp the PA down. There is an RC delay circuit
* on the PA bias voltage rail, so the voltage won't "crash" hard.
* This really helped clean up spurs.
*
*/
if ( mTXPacket->canRampDown() )