Method interruptHook

RFM69_ATC.cpp:121–140

============================================================================= interruptHook() - gets called by the base class interrupt handler right after the header is fetched. =============================================================================

// interruptHook() - gets called by the base class interrupt handler right after the header is fetched.
//=============================================================================
void RFM69_ATC::interruptHook(uint8_t CTLbyte) {
  ACK_RSSI_REQUESTED = CTLbyte & RFM69_CTL_RESERVE1; // TomWS1: extract the ACK RSSI request bit (could potentially merge with ACK_REQUESTED)
  // TomWS1: now see if this was an ACK with an ACK_RSSI response
  if (ACK_RECEIVED && ACK_RSSI_REQUESTED) {
    // the next two bytes contain the ACK_RSSI (assuming the datalength is valid)
    if (DATALEN >= 1) {
      _ackRSSI = -1 * _spi->transfer(0); //rssi was sent as single byte positive value, get the real value by * -1
      DATALEN -= 1;   // and compensate data length accordingly
      // TomWS1: Now dither transmitLevel value (register update occurs later when transmitting);
      if (_targetRSSI != 0) {
        uint8_t maxLevel = _isRFM69HW ? 23 : 31;
        if (_ackRSSI < _targetRSSI && _powerLevel < maxLevel) {
          _powerLevel += _transmitLevelStep;
        }
        else if (_ackRSSI > _targetRSSI && _powerLevel > 0)
          _powerLevel--;
      }
    }
  }
}

//=============================================================================
//  sendWithRetry() - overrides the base to allow increasing power when repeated ACK requests fail