text: /*!
   * \file      RegionCN779.c
   *
   * \brief     Region implementation for CN779
   *
   * \copyright Revised BSD License, see section \ref LICENSE.
   *
   * \code
   *                ______                              _
   *               / _____)             _              | |
   *              ( (____  _____ ____ _| |_ _____  ____| |__
   *               \____ \| ___ |    (_   _) ___ |/ ___)  _ \
   *               _____) ) ____| | | || |_| ____( (___| | | |
   *              (______/|_____)_|_|_| \__)_____)\____)_| |_|
   *              (C)2013-2017 Semtech
   *
   *               ___ _____ _   ___ _  _____ ___  ___  ___ ___
   *              / __|_   _/_\ / __| |/ / __/ _ \| _ \/ __| __|
   *              \__ \ | |/ _ \ (__| ' <| _| (_) |   / (__| _|
   *              |___/ |_/_/ \_\___|_|\_\_| \___/|_|_\\___|___|
   *              embedded.connectivity.solutions===============
   *
   * \endcode
   *
   * \author    Miguel Luis ( Semtech )
   *
   * \author    Gregory Cristian ( Semtech )
   *
   * \author    Daniel Jaeckle ( STACKFORCE )
  */
  #include "utilities.h"
  
  #include "RegionCommon.h"
  #include "RegionCN779.h"
  
  // Definitions
  #define CHANNELS_MASK_SIZE              1
  
  /*!
   * Region specific context
   */
  typedef struct sRegionCN779NvmCtx
  {
      /*!
       * LoRaMAC channels
       */
      ChannelParams_t Channels[ CN779_MAX_NB_CHANNELS ];
      /*!
       * LoRaMac bands
       */
      Band_t Bands[ CN779_MAX_NB_BANDS ];
      /*!
       * LoRaMac channels mask
       */
      uint16_t ChannelsMask[ CHANNELS_MASK_SIZE ];
      /*!
       * LoRaMac channels default mask
       */
      uint16_t ChannelsDefaultMask[ CHANNELS_MASK_SIZE ];
  }RegionCN779NvmCtx_t;
  
  /*
   * Non-volatile module context.
   */
  static RegionCN779NvmCtx_t NvmCtx;
  
  // Static functions
  static bool VerifyRfFreq( uint32_t freq )
  {
      // Check radio driver support
      if( Radio.CheckRfFrequency( freq ) == false )
      {
          return false;
      }
  
      if( ( freq < 779500000 ) || ( freq > 786500000 ) )
      {
          return false;
      }
      return true;
  }
  
  static TimerTime_t GetTimeOnAir( int8_t datarate, uint16_t pktLen )
  {
      int8_t phyDr = DataratesCN779[datarate];
      uint32_t bandwidth = RegionCommonGetBandwidth( datarate, BandwidthsCN779 );
      TimerTime_t timeOnAir = 0;
  
      if( datarate == DR_7 )
      { // High Speed FSK channel
          timeOnAir = Radio.TimeOnAir( MODEM_FSK, bandwidth, phyDr * 1000, 0, 5, false, pktLen, true );
      }
      else
      {
          timeOnAir = Radio.TimeOnAir( MODEM_LORA, bandwidth, phyDr, 1, 8, false, pktLen, true );
      }
      return timeOnAir;
  }
  
  PhyParam_t RegionCN779GetPhyParam( GetPhyParams_t* getPhy )
  {
      PhyParam_t phyParam = { 0 };
  
      switch( getPhy->Attribute )
      {
          case PHY_MIN_RX_DR:
          {
              phyParam.Value = CN779_RX_MIN_DATARATE;
              break;
          }
          case PHY_MIN_TX_DR:
          {
              phyParam.Value = CN779_TX_MIN_DATARATE;
              break;
          }
          case PHY_DEF_TX_DR:
          {
              phyParam.Value = CN779_DEFAULT_DATARATE;
              break;
          }
          case PHY_NEXT_LOWER_TX_DR:
          {
              phyParam.Value = RegionCommonGetNextLowerTxDr( getPhy->Datarate, CN779_TX_MIN_DATARATE );
              break;
          }
          case PHY_MAX_TX_POWER:
          {
              phyParam.Value = CN779_MAX_TX_POWER;
              break;
          }
          case PHY_DEF_TX_POWER:
          {
              phyParam.Value = CN779_DEFAULT_TX_POWER;
              break;
          }
          case PHY_DEF_ADR_ACK_LIMIT:
          {
              phyParam.Value = REGION_COMMON_DEFAULT_ADR_ACK_LIMIT;
              break;
          }
          case PHY_DEF_ADR_ACK_DELAY:
          {
              phyParam.Value = REGION_COMMON_DEFAULT_ADR_ACK_DELAY;
              break;
          }
          case PHY_MAX_PAYLOAD:
          {
              phyParam.Value = MaxPayloadOfDatarateCN779[getPhy->Datarate];
              break;
          }
          case PHY_DUTY_CYCLE:
          {
              phyParam.Value = CN779_DUTY_CYCLE_ENABLED;
              break;
          }
          case PHY_MAX_RX_WINDOW:
          {
              phyParam.Value = CN779_MAX_RX_WINDOW;
              break;
          }
          case PHY_RECEIVE_DELAY1:
          {
              phyParam.Value = REGION_COMMON_DEFAULT_RECEIVE_DELAY1;
              break;
          }
          case PHY_RECEIVE_DELAY2:
          {
              phyParam.Value = REGION_COMMON_DEFAULT_RECEIVE_DELAY2;
              break;
          }
          case PHY_JOIN_ACCEPT_DELAY1:
          {
              phyParam.Value = REGION_COMMON_DEFAULT_JOIN_ACCEPT_DELAY1;
              break;
          }
          case PHY_JOIN_ACCEPT_DELAY2:
          {
              phyParam.Value = REGION_COMMON_DEFAULT_JOIN_ACCEPT_DELAY2;
              break;
          }
          case PHY_MAX_FCNT_GAP:
          {
              phyParam.Value = REGION_COMMON_DEFAULT_MAX_FCNT_GAP;
              break;
          }
          case PHY_ACK_TIMEOUT:
          {
              phyParam.Value = ( REGION_COMMON_DEFAULT_ACK_TIMEOUT + randr( -REGION_COMMON_DEFAULT_ACK_TIMEOUT_RND, REGION_COMMON_DEFAULT_ACK_TIMEOUT_RND ) );
              break;
          }
          case PHY_DEF_DR1_OFFSET:
          {
              phyParam.Value = REGION_COMMON_DEFAULT_RX1_DR_OFFSET;
              break;
          }
          case PHY_DEF_RX2_FREQUENCY:
          {
              phyParam.Value = CN779_RX_WND_2_FREQ;
              break;
          }
          case PHY_DEF_RX2_DR:
          {
              phyParam.Value = CN779_RX_WND_2_DR;
              break;
          }
          case PHY_CHANNELS_MASK:
          {
              phyParam.ChannelsMask = NvmCtx.ChannelsMask;
              break;
          }
          case PHY_CHANNELS_DEFAULT_MASK:
          {
              phyParam.ChannelsMask = NvmCtx.ChannelsDefaultMask;
              break;
          }
          case PHY_MAX_NB_CHANNELS:
          {
              phyParam.Value = CN779_MAX_NB_CHANNELS;
              break;
          }
          case PHY_CHANNELS:
          {
              phyParam.Channels = NvmCtx.Channels;
              break;
          }
          case PHY_DEF_UPLINK_DWELL_TIME:
          {
              phyParam.Value = CN779_DEFAULT_UPLINK_DWELL_TIME;
              break;
          }
          case PHY_DEF_DOWNLINK_DWELL_TIME:
          {
              phyParam.Value = REGION_COMMON_DEFAULT_DOWNLINK_DWELL_TIME;
              break;
          }
          case PHY_DEF_MAX_EIRP:
          {
              phyParam.fValue = CN779_DEFAULT_MAX_EIRP;
              break;
          }
          case PHY_DEF_ANTENNA_GAIN:
          {
              phyParam.fValue = CN779_DEFAULT_ANTENNA_GAIN;
              break;
          }
          case PHY_BEACON_CHANNEL_FREQ:
          {
              phyParam.Value = CN779_BEACON_CHANNEL_FREQ;
              break;
          }
          case PHY_BEACON_FORMAT:
          {
              phyParam.BeaconFormat.BeaconSize = CN779_BEACON_SIZE;
              phyParam.BeaconFormat.Rfu1Size = CN779_RFU1_SIZE;
              phyParam.BeaconFormat.Rfu2Size = CN779_RFU2_SIZE;
              break;
          }
          case PHY_BEACON_CHANNEL_DR:
          {
              phyParam.Value = CN779_BEACON_CHANNEL_DR;
              break;
          }
          case PHY_PING_SLOT_CHANNEL_FREQ:
          {
              phyParam.Value = CN779_PING_SLOT_CHANNEL_FREQ;
              break;
          }
          case PHY_PING_SLOT_CHANNEL_DR:
          {
              phyParam.Value = CN779_PING_SLOT_CHANNEL_DR;
              break;
          }
          case PHY_SF_FROM_DR:
          {
              phyParam.Value = DataratesCN779[getPhy->Datarate];
              break;
          }
          case PHY_BW_FROM_DR:
          {
              phyParam.Value = RegionCommonGetBandwidth( getPhy->Datarate, BandwidthsCN779 );
              break;
          }
          default:
          {
              break;
          }
      }
  
      return phyParam;
  }
  
  void RegionCN779SetBandTxDone( SetBandTxDoneParams_t* txDone )
  {
      RegionCommonSetBandTxDone( &NvmCtx.Bands[NvmCtx.Channels[txDone->Channel].Band],
                                 txDone->LastTxAirTime, txDone->Joined, txDone->ElapsedTimeSinceStartUp );
  }
  
  void RegionCN779InitDefaults( InitDefaultsParams_t* params )
  {
      Band_t bands[CN779_MAX_NB_BANDS] =
      {
          CN779_BAND0
      };
  
      switch( params->Type )
      {
          case INIT_TYPE_DEFAULTS:
          {
              // Default bands
              memcpy1( ( uint8_t* )NvmCtx.Bands, ( uint8_t* )bands, sizeof( Band_t ) * CN779_MAX_NB_BANDS );
  
              // Default channels
              NvmCtx.Channels[0] = ( ChannelParams_t ) CN779_LC1;
              NvmCtx.Channels[1] = ( ChannelParams_t ) CN779_LC2;
              NvmCtx.Channels[2] = ( ChannelParams_t ) CN779_LC3;
  
              // Default ChannelsMask
              NvmCtx.ChannelsDefaultMask[0] = LC( 1 ) + LC( 2 ) + LC( 3 );
  
              // Update the channels mask
              RegionCommonChanMaskCopy( NvmCtx.ChannelsMask, NvmCtx.ChannelsDefaultMask, CHANNELS_MASK_SIZE );
              break;
          }
          case INIT_TYPE_RESET_TO_DEFAULT_CHANNELS:
          {
              // Reset Channels Rx1Frequency to default 0
              NvmCtx.Channels[0].Rx1Frequency = 0;
              NvmCtx.Channels[1].Rx1Frequency = 0;
              NvmCtx.Channels[2].Rx1Frequency = 0;
              // Update the channels mask
              RegionCommonChanMaskCopy( NvmCtx.ChannelsMask, NvmCtx.ChannelsDefaultMask, CHANNELS_MASK_SIZE );
              break;
          }
          case INIT_TYPE_ACTIVATE_DEFAULT_CHANNELS:
          {
              // Restore channels default mask
              NvmCtx.ChannelsMask[0] |= NvmCtx.ChannelsDefaultMask[0];
              break;
          }
          case INIT_TYPE_RESTORE_CTX:
          {
              if( params->NvmCtx != 0 )
              {
                  memcpy1( (uint8_t*) &NvmCtx, (uint8_t*) params->NvmCtx, sizeof( NvmCtx ) );
              }
              break;
          }
          default:
          {
              break;
          }
      }
  }
  
  void* RegionCN779GetNvmCtx( GetNvmCtxParams_t* params )
  {
      params->nvmCtxSize = sizeof( RegionCN779NvmCtx_t );
      return &NvmCtx;
  }
  
  bool RegionCN779Verify( VerifyParams_t* verify, PhyAttribute_t phyAttribute )
  {
      switch( phyAttribute )
      {
          case PHY_FREQUENCY:
          {
              return VerifyRfFreq( verify->Frequency );
          }
          case PHY_TX_DR:
          {
              return RegionCommonValueInRange( verify->DatarateParams.Datarate, CN779_TX_MIN_DATARATE, CN779_TX_MAX_DATARATE );
          }
          case PHY_DEF_TX_DR:
          {
              return RegionCommonValueInRange( verify->DatarateParams.Datarate, DR_0, DR_5 );
          }
          case PHY_RX_DR:
          {
              return RegionCommonValueInRange( verify->DatarateParams.Datarate, CN779_RX_MIN_DATARATE, CN779_RX_MAX_DATARATE );
          }
          case PHY_DEF_TX_POWER:
          case PHY_TX_POWER:
          {
              // Remark: switched min and max!
              return RegionCommonValueInRange( verify->TxPower, CN779_MAX_TX_POWER, CN779_MIN_TX_POWER );
          }
          case PHY_DUTY_CYCLE:
          {
              return CN779_DUTY_CYCLE_ENABLED;
          }
          default:
              return false;
      }
  }
  
  void RegionCN779ApplyCFList( ApplyCFListParams_t* applyCFList )
  {
      ChannelParams_t newChannel;
      ChannelAddParams_t channelAdd;
      ChannelRemoveParams_t channelRemove;
  
      // Setup default datarate range
      newChannel.DrRange.Value = ( DR_5 << 4 ) | DR_0;
  
      // Size of the optional CF list
      if( applyCFList->Size != 16 )
      {
          return;
      }
  
      // Last byte CFListType must be 0 to indicate the CFList contains a list of frequencies
      if( applyCFList->Payload[15] != 0 )
      {
          return;
      }
  
      // Last byte is RFU, don't take it into account
      for( uint8_t i = 0, chanIdx = CN779_NUMB_DEFAULT_CHANNELS; chanIdx < CN779_MAX_NB_CHANNELS; i+=3, chanIdx++ )
      {
          if( chanIdx < ( CN779_NUMB_CHANNELS_CF_LIST + CN779_NUMB_DEFAULT_CHANNELS ) )
          {
              // Channel frequency
              newChannel.Frequency = (uint32_t) applyCFList->Payload[i];
              newChannel.Frequency |= ( (uint32_t) applyCFList->Payload[i + 1] << 8 );
              newChannel.Frequency |= ( (uint32_t) applyCFList->Payload[i + 2] << 16 );
              newChannel.Frequency *= 100;
  
              // Initialize alternative frequency to 0
              newChannel.Rx1Frequency = 0;
          }
          else
          {
              newChannel.Frequency = 0;
              newChannel.DrRange.Value = 0;
              newChannel.Rx1Frequency = 0;
          }
  
          if( newChannel.Frequency != 0 )
          {
              channelAdd.NewChannel = &newChannel;
              channelAdd.ChannelId = chanIdx;
  
              // Try to add all channels
              RegionCN779ChannelAdd( &channelAdd );
          }
          else
          {
              channelRemove.ChannelId = chanIdx;
  
              RegionCN779ChannelsRemove( &channelRemove );
          }
      }
  }
  
  bool RegionCN779ChanMaskSet( ChanMaskSetParams_t* chanMaskSet )
  {
      switch( chanMaskSet->ChannelsMaskType )
      {
          case CHANNELS_MASK:
          {
              RegionCommonChanMaskCopy( NvmCtx.ChannelsMask, chanMaskSet->ChannelsMaskIn, 1 );
              break;
          }
          case CHANNELS_DEFAULT_MASK:
          {
              RegionCommonChanMaskCopy( NvmCtx.ChannelsDefaultMask, chanMaskSet->ChannelsMaskIn, 1 );
              break;
          }
          default:
              return false;
      }
      return true;
  }
  
  void RegionCN779ComputeRxWindowParameters( int8_t datarate, uint8_t minRxSymbols, uint32_t rxError, RxConfigParams_t *rxConfigParams )
  {
      uint32_t tSymbolInUs = 0;
  
      // Get the datarate, perform a boundary check
      rxConfigParams->Datarate = MIN( datarate, CN779_RX_MAX_DATARATE );
      rxConfigParams->Bandwidth = RegionCommonGetBandwidth( rxConfigParams->Datarate, BandwidthsCN779 );
  
      if( rxConfigParams->Datarate == DR_7 )
      { // FSK
          tSymbolInUs = RegionCommonComputeSymbolTimeFsk( DataratesCN779[rxConfigParams->Datarate] );
      }
      else
      { // LoRa
          tSymbolInUs = RegionCommonComputeSymbolTimeLoRa( DataratesCN779[rxConfigParams->Datarate], BandwidthsCN779[rxConfigParams->Datarate] );
      }
  
      RegionCommonComputeRxWindowParameters( tSymbolInUs, minRxSymbols, rxError, Radio.GetWakeupTime( ), &rxConfigParams->WindowTimeout, &rxConfigParams->WindowOffset );
  }
  
  bool RegionCN779RxConfig( RxConfigParams_t* rxConfig, int8_t* datarate )
  {
      RadioModems_t modem;
      int8_t dr = rxConfig->Datarate;
      int8_t phyDr = 0;
      uint32_t frequency = rxConfig->Frequency;
  
      if( Radio.GetStatus( ) != RF_IDLE )
      {
          return false;
      }
  
      if( rxConfig->RxSlot == RX_SLOT_WIN_1 )
      {
          // Apply window 1 frequency
          frequency = NvmCtx.Channels[rxConfig->Channel].Frequency;
          // Apply the alternative RX 1 window frequency, if it is available
          if( NvmCtx.Channels[rxConfig->Channel].Rx1Frequency != 0 )
          {
              frequency = NvmCtx.Channels[rxConfig->Channel].Rx1Frequency;
          }
      }
  
      // Read the physical datarate from the datarates table
      phyDr = DataratesCN779[dr];
  
      Radio.SetChannel( frequency );
  
      // Radio configuration
      if( dr == DR_7 )
      {
          modem = MODEM_FSK;
          Radio.SetRxConfig( modem, 50000, phyDr * 1000, 0, 83333, 5, rxConfig->WindowTimeout, false, 0, true, 0, 0, false, rxConfig->RxContinuous );
      }
      else
      {
          modem = MODEM_LORA;
          Radio.SetRxConfig( modem, rxConfig->Bandwidth, phyDr, 1, 0, 8, rxConfig->WindowTimeout, false, 0, false, 0, 0, true, rxConfig->RxContinuous );
      }
  
      Radio.SetMaxPayloadLength( modem, MaxPayloadOfDatarateCN779[dr] + LORAMAC_FRAME_PAYLOAD_OVERHEAD_SIZE );
  
      DPRINT( "RX on freq %d Hz at DR %d\n\r", frequency, dr );
  
      *datarate = (uint8_t) dr;
      return true;
  }
  
  bool RegionCN779TxConfig( TxConfigParams_t* txConfig, int8_t* txPower, TimerTime_t* txTimeOnAir )
  {
      RadioModems_t modem;
      int8_t phyDr = DataratesCN779[txConfig->Datarate];
      int8_t txPowerLimited = RegionCommonLimitTxPower( txConfig->TxPower, NvmCtx.Bands[NvmCtx.Channels[txConfig->Channel].Band].TxMaxPower );
      uint32_t bandwidth = RegionCommonGetBandwidth( txConfig->Datarate, BandwidthsCN779 );
      int8_t phyTxPower = 0;
  
      // Calculate physical TX power
      phyTxPower = RegionCommonComputeTxPower( txPowerLimited, txConfig->MaxEirp, txConfig->AntennaGain );
  
      // Setup the radio frequency
      Radio.SetChannel( NvmCtx.Channels[txConfig->Channel].Frequency );
  
      if( txConfig->Datarate == DR_7 )
      { // High Speed FSK channel
          modem = MODEM_FSK;
          Radio.SetTxConfig( modem, phyTxPower, 25000, bandwidth, phyDr * 1000, 0, 5, false, true, 0, 0, false, 4000 );
      }
      else
      {
          modem = MODEM_LORA;
          Radio.SetTxConfig( modem, phyTxPower, 0, bandwidth, phyDr, 1, 8, false, true, 0, 0, false, 4000 );
      }
  
      // Update time-on-air
      *txTimeOnAir = GetTimeOnAir( txConfig->Datarate, txConfig->PktLen );
  
      DPRINT( "TX on freq %d Hz at DR %d\n\r", NvmCtx.Channels[txConfig->Channel].Frequency, txConfig->Datarate );
      
      // Setup maximum payload lenght of the radio driver
      Radio.SetMaxPayloadLength( modem, txConfig->PktLen );
  
      *txPower = txPowerLimited;
      return true;
  }
  
  uint8_t RegionCN779LinkAdrReq( LinkAdrReqParams_t* linkAdrReq, int8_t* drOut, int8_t* txPowOut, uint8_t* nbRepOut, uint8_t* nbBytesParsed )
  {
      uint8_t status = 0x07;
      RegionCommonLinkAdrParams_t linkAdrParams = { 0 };
      uint8_t nextIndex = 0;
      uint8_t bytesProcessed = 0;
      uint16_t chMask = 0;
      GetPhyParams_t getPhy;
      PhyParam_t phyParam;
      RegionCommonLinkAdrReqVerifyParams_t linkAdrVerifyParams;
  
      while( bytesProcessed < linkAdrReq->PayloadSize )
      {
          // Get ADR request parameters
          nextIndex = RegionCommonParseLinkAdrReq( &( linkAdrReq->Payload[bytesProcessed] ), &linkAdrParams );
  
          if( nextIndex == 0 )
              break; // break loop, since no more request has been found
  
          // Update bytes processed
          bytesProcessed += nextIndex;
  
          // Revert status, as we only check the last ADR request for the channel mask KO
          status = 0x07;
  
          // Setup temporary channels mask
          chMask = linkAdrParams.ChMask;
  
          // Verify channels mask
          if( ( linkAdrParams.ChMaskCtrl == 0 ) && ( chMask == 0 ) )
          {
              status &= 0xFE; // Channel mask KO
          }
          else if( ( ( linkAdrParams.ChMaskCtrl >= 1 ) && ( linkAdrParams.ChMaskCtrl <= 5 )) ||
                  ( linkAdrParams.ChMaskCtrl >= 7 ) )
          {
              // RFU
              status &= 0xFE; // Channel mask KO
          }
          else
          {
              for( uint8_t i = 0; i < CN779_MAX_NB_CHANNELS; i++ )
              {
                  if( linkAdrParams.ChMaskCtrl == 6 )
                  {
                      if( NvmCtx.Channels[i].Frequency != 0 )
                      {
                          chMask |= 1 << i;
                      }
                  }
                  else
                  {
                      if( ( ( chMask & ( 1 << i ) ) != 0 ) &&
                          ( NvmCtx.Channels[i].Frequency == 0 ) )
                      {// Trying to enable an undefined channel
                          status &= 0xFE; // Channel mask KO
                      }
                  }
              }
          }
      }
  
      // Get the minimum possible datarate
      getPhy.Attribute = PHY_MIN_TX_DR;
      getPhy.UplinkDwellTime = linkAdrReq->UplinkDwellTime;
      phyParam = RegionCN779GetPhyParam( &getPhy );
  
      linkAdrVerifyParams.Status = status;
      linkAdrVerifyParams.AdrEnabled = linkAdrReq->AdrEnabled;
      linkAdrVerifyParams.Datarate = linkAdrParams.Datarate;
      linkAdrVerifyParams.TxPower = linkAdrParams.TxPower;
      linkAdrVerifyParams.NbRep = linkAdrParams.NbRep;
      linkAdrVerifyParams.CurrentDatarate = linkAdrReq->CurrentDatarate;
      linkAdrVerifyParams.CurrentTxPower = linkAdrReq->CurrentTxPower;
      linkAdrVerifyParams.CurrentNbRep = linkAdrReq->CurrentNbRep;
      linkAdrVerifyParams.NbChannels = CN779_MAX_NB_CHANNELS;
      linkAdrVerifyParams.ChannelsMask = &chMask;
      linkAdrVerifyParams.MinDatarate = ( int8_t )phyParam.Value;
      linkAdrVerifyParams.MaxDatarate = CN779_TX_MAX_DATARATE;
      linkAdrVerifyParams.Channels = NvmCtx.Channels;
      linkAdrVerifyParams.MinTxPower = CN779_MIN_TX_POWER;
      linkAdrVerifyParams.MaxTxPower = CN779_MAX_TX_POWER;
      linkAdrVerifyParams.Version = linkAdrReq->Version;
  
      // Verify the parameters and update, if necessary
      status = RegionCommonLinkAdrReqVerifyParams( &linkAdrVerifyParams, &linkAdrParams.Datarate, &linkAdrParams.TxPower, &linkAdrParams.NbRep );
  
      // Update channelsMask if everything is correct
      if( status == 0x07 )
      {
          // Set the channels mask to a default value
          memset1( ( uint8_t* ) NvmCtx.ChannelsMask, 0, sizeof( NvmCtx.ChannelsMask ) );
          // Update the channels mask
          NvmCtx.ChannelsMask[0] = chMask;
      }
  
      // Update status variables
      *drOut = linkAdrParams.Datarate;
      *txPowOut = linkAdrParams.TxPower;
      *nbRepOut = linkAdrParams.NbRep;
      *nbBytesParsed = bytesProcessed;
  
      return status;
  }
  
  uint8_t RegionCN779RxParamSetupReq( RxParamSetupReqParams_t* rxParamSetupReq )
  {
      uint8_t status = 0x07;
  
      // Verify radio frequency
      if( VerifyRfFreq( rxParamSetupReq->Frequency ) == false )
      {
          status &= 0xFE; // Channel frequency KO
      }
  
      // Verify datarate
      if( RegionCommonValueInRange( rxParamSetupReq->Datarate, CN779_RX_MIN_DATARATE, CN779_RX_MAX_DATARATE ) == false )
      {
          status &= 0xFD; // Datarate KO
      }
  
      // Verify datarate offset
      if( RegionCommonValueInRange( rxParamSetupReq->DrOffset, CN779_MIN_RX1_DR_OFFSET, CN779_MAX_RX1_DR_OFFSET ) == false )
      {
          status &= 0xFB; // Rx1DrOffset range KO
      }
  
      return status;
  }
  
  uint8_t RegionCN779NewChannelReq( NewChannelReqParams_t* newChannelReq )
  {
      uint8_t status = 0x03;
      ChannelAddParams_t channelAdd;
      ChannelRemoveParams_t channelRemove;
  
      if( newChannelReq->NewChannel->Frequency == 0 )
      {
          channelRemove.ChannelId = newChannelReq->ChannelId;
  
          // Remove
          if( RegionCN779ChannelsRemove( &channelRemove ) == false )
          {
              status &= 0xFC;
          }
      }
      else
      {
          channelAdd.NewChannel = newChannelReq->NewChannel;
          channelAdd.ChannelId = newChannelReq->ChannelId;
  
          switch( RegionCN779ChannelAdd( &channelAdd ) )
          {
              case LORAMAC_STATUS_OK:
              {
                  break;
              }
              case LORAMAC_STATUS_FREQUENCY_INVALID:
              {
                  status &= 0xFE;
                  break;
              }
              case LORAMAC_STATUS_DATARATE_INVALID:
              {
                  status &= 0xFD;
                  break;
              }
              case LORAMAC_STATUS_FREQ_AND_DR_INVALID:
              {
                  status &= 0xFC;
                  break;
              }
              default:
              {
                  status &= 0xFC;
                  break;
              }
          }
      }
  
      return status;
  }
  
  int8_t RegionCN779TxParamSetupReq( TxParamSetupReqParams_t* txParamSetupReq )
  {
      return -1;
  }
  
  uint8_t RegionCN779DlChannelReq( DlChannelReqParams_t* dlChannelReq )
  {
      uint8_t status = 0x03;
  
      // Verify if the frequency is supported
      if( VerifyRfFreq( dlChannelReq->Rx1Frequency ) == false )
      {
          status &= 0xFE;
      }
  
      // Verify if an uplink frequency exists
      if( NvmCtx.Channels[dlChannelReq->ChannelId].Frequency == 0 )
      {
          status &= 0xFD;
      }
  
      // Apply Rx1 frequency, if the status is OK
      if( status == 0x03 )
      {
          NvmCtx.Channels[dlChannelReq->ChannelId].Rx1Frequency = dlChannelReq->Rx1Frequency;
      }
  
      return status;
  }
  
  int8_t RegionCN779AlternateDr( int8_t currentDr, AlternateDrType_t type )
  {
      return currentDr;
  }
  
  LoRaMacStatus_t RegionCN779NextChannel( NextChanParams_t* nextChanParams, uint8_t* channel, TimerTime_t* time, TimerTime_t* aggregatedTimeOff )
  {
      uint8_t nbEnabledChannels = 0;
      uint8_t nbRestrictedChannels = 0;
      uint8_t enabledChannels[CN779_MAX_NB_CHANNELS] = { 0 };
      RegionCommonIdentifyChannelsParam_t identifyChannelsParam;
      RegionCommonCountNbOfEnabledChannelsParams_t countChannelsParams;
      LoRaMacStatus_t status = LORAMAC_STATUS_NO_CHANNEL_FOUND;
      uint16_t joinChannels = CN779_JOIN_CHANNELS;
  
      if( RegionCommonCountChannels( NvmCtx.ChannelsMask, 0, 1 ) == 0 )
      { // Reactivate default channels
          NvmCtx.ChannelsMask[0] |= LC( 1 ) + LC( 2 ) + LC( 3 );
      }
  
      // Search how many channels are enabled
      countChannelsParams.Joined = nextChanParams->Joined;
      countChannelsParams.Datarate = nextChanParams->Datarate;
      countChannelsParams.ChannelsMask = NvmCtx.ChannelsMask;
      countChannelsParams.Channels = NvmCtx.Channels;
      countChannelsParams.Bands = NvmCtx.Bands;
      countChannelsParams.MaxNbChannels = CN779_MAX_NB_CHANNELS;
      countChannelsParams.JoinChannels = &joinChannels;
  
      identifyChannelsParam.AggrTimeOff = nextChanParams->AggrTimeOff;
      identifyChannelsParam.LastAggrTx = nextChanParams->LastAggrTx;
      identifyChannelsParam.DutyCycleEnabled = nextChanParams->DutyCycleEnabled;
      identifyChannelsParam.MaxBands = CN779_MAX_NB_BANDS;
  
      identifyChannelsParam.ElapsedTimeSinceStartUp = nextChanParams->ElapsedTimeSinceStartUp;
      identifyChannelsParam.LastTxIsJoinRequest = nextChanParams->LastTxIsJoinRequest;
      identifyChannelsParam.ExpectedTimeOnAir = GetTimeOnAir( nextChanParams->Datarate, nextChanParams->PktLen );
  
      identifyChannelsParam.CountNbOfEnabledChannelsParam = &countChannelsParams;
  
      status = RegionCommonIdentifyChannels( &identifyChannelsParam, aggregatedTimeOff, enabledChannels,
                                             &nbEnabledChannels, &nbRestrictedChannels, time );
  
      if( status == LORAMAC_STATUS_OK )
      {
          // We found a valid channel
          *channel = enabledChannels[randr( 0, nbEnabledChannels - 1 )];
      }
      else if( status == LORAMAC_STATUS_NO_CHANNEL_FOUND )
      {
          // Datarate not supported by any channel, restore defaults
          NvmCtx.ChannelsMask[0] |= LC( 1 ) + LC( 2 ) + LC( 3 );
      }
      return status;
  }
  
  LoRaMacStatus_t RegionCN779ChannelAdd( ChannelAddParams_t* channelAdd )
  {
      bool drInvalid = false;
      bool freqInvalid = false;
      uint8_t id = channelAdd->ChannelId;
  
      if( id < CN779_NUMB_DEFAULT_CHANNELS )
      {
          return LORAMAC_STATUS_FREQ_AND_DR_INVALID;
      }
  
      if( id >= CN779_MAX_NB_CHANNELS )
      {
          return LORAMAC_STATUS_PARAMETER_INVALID;
      }
  
      // Validate the datarate range
      if( RegionCommonValueInRange( channelAdd->NewChannel->DrRange.Fields.Min, CN779_TX_MIN_DATARATE, CN779_TX_MAX_DATARATE ) == false )
      {
          drInvalid = true;
      }
      if( RegionCommonValueInRange( channelAdd->NewChannel->DrRange.Fields.Max, CN779_TX_MIN_DATARATE, CN779_TX_MAX_DATARATE ) == false )
      {
          drInvalid = true;
      }
      if( channelAdd->NewChannel->DrRange.Fields.Min > channelAdd->NewChannel->DrRange.Fields.Max )
      {
          drInvalid = true;
      }
  
      // Check frequency
      if( freqInvalid == false )
      {
          if( VerifyRfFreq( channelAdd->NewChannel->Frequency ) == false )
          {
              freqInvalid = true;
          }
      }
  
      // Check status
      if( ( drInvalid == true ) && ( freqInvalid == true ) )
      {
          return LORAMAC_STATUS_FREQ_AND_DR_INVALID;
      }
      if( drInvalid == true )
      {
          return LORAMAC_STATUS_DATARATE_INVALID;
      }
      if( freqInvalid == true )
      {
          return LORAMAC_STATUS_FREQUENCY_INVALID;
      }
  
      memcpy1( ( uint8_t* ) &(NvmCtx.Channels[id]), ( uint8_t* ) channelAdd->NewChannel, sizeof( NvmCtx.Channels[id] ) );
      NvmCtx.Channels[id].Band = 0;
      NvmCtx.ChannelsMask[0] |= ( 1 << id );
      return LORAMAC_STATUS_OK;
  }
  
  bool RegionCN779ChannelsRemove( ChannelRemoveParams_t* channelRemove  )
  {
      uint8_t id = channelRemove->ChannelId;
  
      if( id < CN779_NUMB_DEFAULT_CHANNELS )
      {
          return false;
      }
  
      // Remove the channel from the list of channels
      NvmCtx.Channels[id] = ( ChannelParams_t ){ 0, 0, { 0 }, 0 };
  
      return RegionCommonChanDisable( NvmCtx.ChannelsMask, id, CN779_MAX_NB_CHANNELS );
  }
  
  void RegionCN779SetContinuousWave( ContinuousWaveParams_t* continuousWave )
  {
      int8_t txPowerLimited = RegionCommonLimitTxPower( continuousWave->TxPower, NvmCtx.Bands[NvmCtx.Channels[continuousWave->Channel].Band].TxMaxPower );
      int8_t phyTxPower = 0;
      uint32_t frequency = NvmCtx.Channels[continuousWave->Channel].Frequency;
  
      // Calculate physical TX power
      phyTxPower = RegionCommonComputeTxPower( txPowerLimited, continuousWave->MaxEirp, continuousWave->AntennaGain );
  
      Radio.SetTxContinuousWave( frequency, phyTxPower, continuousWave->Timeout );
  }
  
  uint8_t RegionCN779ApplyDrOffset( uint8_t downlinkDwellTime, int8_t dr, int8_t drOffset )
  {
      int8_t datarate = dr - drOffset;
  
      if( datarate < 0 )
      {
          datarate = DR_0;
      }
      return datarate;
  }
  
  void RegionCN779RxBeaconSetup( RxBeaconSetup_t* rxBeaconSetup, uint8_t* outDr )
  {
      RegionCommonRxBeaconSetupParams_t regionCommonRxBeaconSetup;
  
      regionCommonRxBeaconSetup.Datarates = DataratesCN779;
      regionCommonRxBeaconSetup.Frequency = rxBeaconSetup->Frequency;
      regionCommonRxBeaconSetup.BeaconSize = CN779_BEACON_SIZE;
      regionCommonRxBeaconSetup.BeaconDatarate = CN779_BEACON_CHANNEL_DR;
      regionCommonRxBeaconSetup.BeaconChannelBW = CN779_BEACON_CHANNEL_BW;
      regionCommonRxBeaconSetup.RxTime = rxBeaconSetup->RxTime;
      regionCommonRxBeaconSetup.SymbolTimeout = rxBeaconSetup->SymbolTimeout;
  
      RegionCommonRxBeaconSetup( &regionCommonRxBeaconSetup );
  
      // Store downlink datarate
      *outDr = CN779_BEACON_CHANNEL_DR;
  }
  