pcb changes

Fork of SingleFrequencyLora by Christopher De Bank

Revision:
0:e6ceb13d2d05
Child:
4:f0ce52e94d3f
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sx1276/sx1276.cpp	Mon Aug 18 14:24:46 2014 +0000
@@ -0,0 +1,1308 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+( C )2014 Semtech
+
+Description: Actual implementation of a SX1276 radio, inherits Radio
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+
+Maintainers: Miguel Luis, Gregory Cristian and Nicolas Huguenin
+*/
+#include "sx1276.h"
+
+#include "debug.h"
+
+const FskBandwidth_t SX1276::FskBandwidths[] =
+{       
+    { 2600  , 0x17 },   
+    { 3100  , 0x0F },
+    { 3900  , 0x07 },
+    { 5200  , 0x16 },
+    { 6300  , 0x0E },
+    { 7800  , 0x06 },
+    { 10400 , 0x15 },
+    { 12500 , 0x0D },
+    { 15600 , 0x05 },
+    { 20800 , 0x14 },
+    { 25000 , 0x0C },
+    { 31300 , 0x04 },
+    { 41700 , 0x13 },
+    { 50000 , 0x0B },
+    { 62500 , 0x03 },
+    { 83333 , 0x12 },
+    { 100000, 0x0A },
+    { 125000, 0x02 },
+    { 166700, 0x11 },
+    { 200000, 0x09 },
+    { 250000, 0x01 }
+};
+
+
+SX1276::SX1276( void ( *txDone )( ), void ( *txTimeout ) ( ), void ( *rxDone ) ( uint8_t *payload, uint16_t size, int8_t rssi, int8_t snr ), void ( *rxTimeout ) ( ), void ( *rxError ) ( ),
+			    PinName mosi, PinName miso, PinName sclk, PinName nss, PinName reset,
+                PinName dio0, PinName dio1, PinName dio2, PinName dio3, PinName dio4, PinName dio5 )
+			:   Radio( txDone, txTimeout, rxDone, rxTimeout, rxError ),
+				spi( mosi, miso, sclk ),
+				nss( nss ),
+				reset( reset ),
+				dio0( dio0 ), dio1( dio1 ), dio2( dio2 ), dio3( dio3 ), dio4( dio4 ), dio5( dio5 ),
+				isRadioActive( false )
+{
+	wait_ms( 10 );
+	this->rxTx = 0;
+	this->rxBuffer = new uint8_t[RX_BUFFER_SIZE];
+	previousOpMode = RF_OPMODE_STANDBY;
+	
+	this->dioIrq = new DioIrqHandler[6];
+
+	this->dioIrq[0] = &SX1276::OnDio0Irq;
+	this->dioIrq[1] = &SX1276::OnDio1Irq;
+	this->dioIrq[2] = &SX1276::OnDio2Irq;
+	this->dioIrq[3] = &SX1276::OnDio3Irq;
+	this->dioIrq[4] = &SX1276::OnDio4Irq;
+	this->dioIrq[5] = NULL;
+}
+
+SX1276::~SX1276( )
+{
+	delete this->rxBuffer;
+	delete this->dioIrq;
+}
+
+void SX1276::RxChainCalibration( void )
+{
+    uint8_t regPaConfigInitVal;
+    uint32_t initialFreq;
+
+    // Save context
+    regPaConfigInitVal = this->Read( REG_PACONFIG );
+    initialFreq = ( double )( ( ( uint32_t )this->Read( REG_FRFMSB ) << 16 ) |
+                              ( ( uint32_t )this->Read( REG_FRFMID ) << 8 ) |
+                              ( ( uint32_t )this->Read( REG_FRFLSB ) ) ) * ( double )FREQ_STEP;
+
+    // Cut the PA just in case, RFO output, power = -1 dBm
+    this->Write( REG_PACONFIG, 0x00 );
+
+    // Launch Rx chain calibration for LF band
+    Write ( REG_IMAGECAL, ( Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_MASK ) | RF_IMAGECAL_IMAGECAL_START );
+    while( ( Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_RUNNING ) == RF_IMAGECAL_IMAGECAL_RUNNING )
+    {
+    }
+
+    // Sets a Frequency in HF band
+    settings.Channel=  868000000 ;
+
+    // Launch Rx chain calibration for HF band 
+    Write ( REG_IMAGECAL, ( Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_MASK ) | RF_IMAGECAL_IMAGECAL_START );
+    while( ( Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_RUNNING ) == RF_IMAGECAL_IMAGECAL_RUNNING )
+    {
+    }
+
+    // Restore context
+    this->Write( REG_PACONFIG, regPaConfigInitVal );
+    SetChannel( initialFreq );
+}
+
+RadioState SX1276::GetState( void )
+{
+    return this->settings.State;
+}
+
+void SX1276::SetChannel( uint32_t freq )
+{
+    this->settings.Channel = freq;
+    freq = ( uint32_t )( ( double )freq / ( double )FREQ_STEP );
+    Write( REG_FRFMSB, ( uint8_t )( ( freq >> 16 ) & 0xFF ) );
+    Write( REG_FRFMID, ( uint8_t )( ( freq >> 8 ) & 0xFF ) );
+    Write( REG_FRFLSB, ( uint8_t )( freq & 0xFF ) );
+}
+
+bool SX1276::IsChannelFree( ModemType modem, uint32_t freq, int8_t rssiThresh )
+{
+    int8_t rssi = 0;
+    
+    SetModem( modem );
+
+    SetChannel( freq );
+    
+    SetOpMode( RF_OPMODE_RECEIVER );
+
+    wait( 0.001 );
+    
+    rssi = GetRssi( modem );
+    
+    Sleep( );
+    
+    if( rssi > rssiThresh )
+    {
+        return false;
+    }
+    return true;
+}
+
+uint32_t SX1276::Random( void )
+{
+    uint8_t i;
+    uint32_t rnd = 0;
+
+    /*
+     * Radio setup for random number generation 
+     */
+    // Set LoRa modem ON
+    SetModem( MODEM_LORA );
+
+    // Disable LoRa modem interrupts
+    Write( REG_LR_IRQFLAGSMASK, RFLR_IRQFLAGS_RXTIMEOUT |
+                  RFLR_IRQFLAGS_RXDONE |
+                  RFLR_IRQFLAGS_PAYLOADCRCERROR |
+                  RFLR_IRQFLAGS_VALIDHEADER |
+                  RFLR_IRQFLAGS_TXDONE |
+                  RFLR_IRQFLAGS_CADDONE |
+                  RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL |
+                  RFLR_IRQFLAGS_CADDETECTED );
+
+    // Set radio in continuous reception
+    SetOpMode( RF_OPMODE_RECEIVER );
+
+    for( i = 0; i < 32; i++ )
+    {
+        wait( 0.001 );
+        // Unfiltered RSSI value reading. Only takes the LSB value
+        rnd |= ( ( uint32_t )Read( REG_LR_RSSIWIDEBAND ) & 0x01 ) << i;
+    }
+
+    Sleep( );
+
+    return rnd;
+}
+
+/*!
+ * Returns the known FSK bandwidth registers value
+ *
+ * \param [IN] bandwidth Bandwidth value in Hz
+ * \retval regValue Bandwidth register value.
+ */
+uint8_t SX1276::GetFskBandwidthRegValue( uint32_t bandwidth )
+{
+    uint8_t i;
+
+    for( i = 0; i < ( sizeof( FskBandwidths ) / sizeof( FskBandwidth_t ) ) - 1; i++ )
+    {
+        if( ( bandwidth >= FskBandwidths[i].bandwidth ) && ( bandwidth < FskBandwidths[i + 1].bandwidth ) )
+        {
+            return FskBandwidths[i].RegValue;
+        }
+    }
+    // ERROR: Value not found
+    while( 1 );
+}
+
+void SX1276::SetRxConfig( ModemType modem, uint32_t bandwidth,
+                         uint32_t datarate, uint8_t coderate,
+                         uint32_t bandwidthAfc, uint16_t preambleLen,
+                         uint16_t symbTimeout, bool fixLen,
+                         bool crcOn, bool iqInverted, bool rxContinuous )
+{
+    SetModem( modem );
+
+    switch( modem )
+    {
+    case MODEM_FSK:
+        {
+            this->settings.Fsk.Bandwidth = bandwidth;
+            this->settings.Fsk.Datarate = datarate;
+            this->settings.Fsk.BandwidthAfc = bandwidthAfc;
+            this->settings.Fsk.FixLen = fixLen;
+            this->settings.Fsk.CrcOn = crcOn;
+            this->settings.Fsk.IqInverted = iqInverted;
+            this->settings.Fsk.RxContinuous = rxContinuous;
+            this->settings.Fsk.PreambleLen = preambleLen;
+            
+            datarate = ( uint16_t )( ( double )XTAL_FREQ / ( double )datarate );
+            Write( REG_BITRATEMSB, ( uint8_t )( datarate >> 8 ) );
+            Write( REG_BITRATELSB, ( uint8_t )( datarate & 0xFF ) );
+
+            Write( REG_RXBW, GetFskBandwidthRegValue( bandwidth ) );
+            Write( REG_AFCBW, GetFskBandwidthRegValue( bandwidthAfc ) );
+
+            Write( REG_LR_PREAMBLEMSB, ( uint8_t )( ( preambleLen >> 8 ) & 0xFF ) );
+            Write( REG_LR_PREAMBLELSB, ( uint8_t )( preambleLen & 0xFF ) );
+
+            Write( REG_PACKETCONFIG1,
+                         ( Read( REG_PACKETCONFIG1 ) & 
+                           RF_PACKETCONFIG1_CRC_MASK &
+                           RF_PACKETCONFIG1_PACKETFORMAT_MASK ) |
+                           ( ( fixLen == 1 ) ? RF_PACKETCONFIG1_PACKETFORMAT_FIXED : RF_PACKETCONFIG1_PACKETFORMAT_VARIABLE ) |
+                           ( crcOn << 4 ) );
+        }
+        break;
+    case MODEM_LORA:
+        {
+            if( bandwidth > 2 )
+            {
+                // Fatal error: When using LoRa modem only bandwidths 125, 250 and 500 kHz are supported
+                while( 1 );
+            }
+            bandwidth += 7;
+            this->settings.LoRa.Bandwidth = bandwidth;
+            this->settings.LoRa.Datarate = datarate;
+            this->settings.LoRa.Coderate = coderate;
+            this->settings.LoRa.FixLen = fixLen;
+            this->settings.LoRa.CrcOn = crcOn;
+            this->settings.LoRa.IqInverted = iqInverted;
+            this->settings.LoRa.RxContinuous = rxContinuous;
+
+            if( datarate > 12 )
+            {
+                datarate = 12;
+            }
+            else if( datarate < 6 )
+            {
+                datarate = 6;
+            }
+        
+            if( ( ( bandwidth == 7 ) && ( ( datarate == 11 ) || ( datarate == 12 ) ) ) ||
+                ( ( bandwidth == 8 ) && ( datarate == 12 ) ) )
+            {
+                this->settings.LoRa.LowDatarateOptimize = 0x01;
+            }
+            else
+            {
+                this->settings.LoRa.LowDatarateOptimize = 0x00;
+            }
+
+            Write( REG_LR_MODEMCONFIG1, 
+                         ( Read( REG_LR_MODEMCONFIG1 ) &
+                           RFLR_MODEMCONFIG1_BW_MASK &
+                           RFLR_MODEMCONFIG1_CODINGRATE_MASK &
+                           RFLR_MODEMCONFIG1_IMPLICITHEADER_MASK ) |
+                           ( bandwidth << 4 ) | ( coderate << 1 ) | 
+                           fixLen );
+                        
+            Write( REG_LR_MODEMCONFIG2,
+                         ( Read( REG_LR_MODEMCONFIG2 ) &
+                           RFLR_MODEMCONFIG2_SF_MASK &
+                           RFLR_MODEMCONFIG2_RXPAYLOADCRC_MASK &
+                           RFLR_MODEMCONFIG2_SYMBTIMEOUTMSB_MASK ) |
+                           ( datarate << 4 ) | ( crcOn << 2 ) |
+                           ( ( symbTimeout >> 8 ) & ~RFLR_MODEMCONFIG2_SYMBTIMEOUTMSB_MASK ) );
+
+            Write( REG_LR_MODEMCONFIG3, 
+                         ( Read( REG_LR_MODEMCONFIG3 ) &
+                           RFLR_MODEMCONFIG3_LOWDATARATEOPTIMIZE_MASK ) |
+                           ( this->settings.LoRa.LowDatarateOptimize << 3 ) );
+
+            Write( REG_LR_SYMBTIMEOUTLSB, ( uint8_t )( symbTimeout & 0xFF ) );
+            
+            Write( REG_LR_PREAMBLEMSB, ( uint8_t )( ( preambleLen >> 8 ) & 0xFF ) );
+            Write( REG_LR_PREAMBLELSB, ( uint8_t )( preambleLen & 0xFF ) );
+
+            if( datarate == 6 )
+            {
+                Write( REG_LR_DETECTOPTIMIZE, 
+                             ( Read( REG_LR_DETECTOPTIMIZE ) &
+                               RFLR_DETECTIONOPTIMIZE_MASK ) |
+                               RFLR_DETECTIONOPTIMIZE_SF6 );
+                Write( REG_LR_DETECTIONTHRESHOLD, 
+                             RFLR_DETECTIONTHRESH_SF6 );
+            }
+            else
+            {
+                Write( REG_LR_DETECTOPTIMIZE,
+                             ( Read( REG_LR_DETECTOPTIMIZE ) &
+                             RFLR_DETECTIONOPTIMIZE_MASK ) |
+                             RFLR_DETECTIONOPTIMIZE_SF7_TO_SF12 );
+                Write( REG_LR_DETECTIONTHRESHOLD, 
+                             RFLR_DETECTIONTHRESH_SF7_TO_SF12 );
+            }
+        }
+        break;
+    }
+}
+
+void SX1276::SetTxConfig( ModemType modem, int8_t power, uint32_t fdev, 
+                        uint32_t bandwidth, uint32_t datarate,
+                        uint8_t coderate, uint16_t preambleLen,
+                        bool fixLen, bool crcOn,
+                        bool iqInverted, uint32_t timeout )
+{
+    uint8_t paConfig = 0;
+    uint8_t paDac = 0;
+
+    SetModem( modem );
+    
+    paConfig = Read( REG_PACONFIG );
+    paDac = Read( REG_PADAC );
+
+    paConfig = ( paConfig & RF_PACONFIG_PASELECT_MASK ) | GetPaSelect( this->settings.Channel );
+    paConfig = ( paConfig & RF_PACONFIG_MAX_POWER_MASK ) | 0x70;
+
+    if( ( paConfig & RF_PACONFIG_PASELECT_PABOOST ) == RF_PACONFIG_PASELECT_PABOOST )
+    {
+        if( power > 17 )
+        {
+            paDac = ( paDac & RF_PADAC_20DBM_MASK ) | RF_PADAC_20DBM_ON;
+        }
+        else
+        {
+            paDac = ( paDac & RF_PADAC_20DBM_MASK ) | RF_PADAC_20DBM_OFF;
+        }
+        if( ( paDac & RF_PADAC_20DBM_ON ) == RF_PADAC_20DBM_ON )
+        {
+            if( power < 5 )
+            {
+                power = 5;
+            }
+            if( power > 20 )
+            {
+                power = 20;
+            }
+            paConfig = ( paConfig & RF_PACONFIG_OUTPUTPOWER_MASK ) | ( uint8_t )( ( uint16_t )( power - 5 ) & 0x0F );
+        }
+        else
+        {
+            if( power < 2 )
+            {
+                power = 2;
+            }
+            if( power > 17 )
+            {
+                power = 17;
+            }
+            paConfig = ( paConfig & RF_PACONFIG_OUTPUTPOWER_MASK ) | ( uint8_t )( ( uint16_t )( power - 2 ) & 0x0F );
+        }
+    }
+    else
+    {
+        if( power < -1 )
+        {
+            power = -1;
+        }
+        if( power > 14 )
+        {
+            power = 14;
+        }
+        paConfig = ( paConfig & RF_PACONFIG_OUTPUTPOWER_MASK ) | ( uint8_t )( ( uint16_t )( power + 1 ) & 0x0F );
+    }
+    Write( REG_PACONFIG, paConfig );
+    Write( REG_PADAC, paDac );
+
+    switch( modem )
+    {
+    case MODEM_FSK:
+        {
+            this->settings.Fsk.Power = power;
+            this->settings.Fsk.Fdev = fdev;
+            this->settings.Fsk.Bandwidth = bandwidth;
+            this->settings.Fsk.Datarate = datarate;
+            this->settings.Fsk.PreambleLen = preambleLen;
+            this->settings.Fsk.FixLen = fixLen;
+            this->settings.Fsk.CrcOn = crcOn;
+            this->settings.Fsk.IqInverted = iqInverted;
+            this->settings.Fsk.TxTimeout = timeout;
+            
+            fdev = ( uint16_t )( ( double )fdev / ( double )FREQ_STEP );
+            Write( REG_FDEVMSB, ( uint8_t )( fdev >> 8 ) );
+            Write( REG_FDEVLSB, ( uint8_t )( fdev & 0xFF ) );
+
+            datarate = ( uint16_t )( ( double )XTAL_FREQ / ( double )datarate );
+            Write( REG_BITRATEMSB, ( uint8_t )( datarate >> 8 ) );
+            Write( REG_BITRATELSB, ( uint8_t )( datarate & 0xFF ) );
+
+            Write( REG_PREAMBLEMSB, ( preambleLen >> 8 ) & 0x00FF );
+            Write( REG_PREAMBLELSB, preambleLen & 0xFF );
+
+            Write( REG_PACKETCONFIG1,
+                         ( Read( REG_PACKETCONFIG1 ) & 
+                           RF_PACKETCONFIG1_CRC_MASK &
+                           RF_PACKETCONFIG1_PACKETFORMAT_MASK ) |
+                           ( ( fixLen == 1 ) ? RF_PACKETCONFIG1_PACKETFORMAT_FIXED : RF_PACKETCONFIG1_PACKETFORMAT_VARIABLE ) |
+                           ( crcOn << 4 ) );
+        
+        }
+        break;
+    case MODEM_LORA:
+        {
+            this->settings.LoRa.Power = power;
+            if( bandwidth > 2 )
+            {
+                // Fatal error: When using LoRa modem only bandwidths 125, 250 and 500 kHz are supported
+                while( 1 );
+            }
+            bandwidth += 7;
+            this->settings.LoRa.Bandwidth = bandwidth;
+            this->settings.LoRa.Datarate = datarate;
+            this->settings.LoRa.Coderate = coderate;
+            this->settings.LoRa.PreambleLen = preambleLen;
+            this->settings.LoRa.FixLen = fixLen;
+            this->settings.LoRa.CrcOn = crcOn;
+            this->settings.LoRa.IqInverted = iqInverted;
+            this->settings.LoRa.TxTimeout = timeout;
+
+            if( datarate > 12 )
+            {
+                datarate = 12;
+            }
+            else if( datarate < 6 )
+            {
+                datarate = 6;
+            }
+            if( ( ( bandwidth == 7 ) && ( ( datarate == 11 ) || ( datarate == 12 ) ) ) ||
+                ( ( bandwidth == 8 ) && ( datarate == 12 ) ) )
+            {
+                this->settings.LoRa.LowDatarateOptimize = 0x01;
+            }
+            else
+            {
+                this->settings.LoRa.LowDatarateOptimize = 0x00;
+            }
+
+            Write( REG_LR_MODEMCONFIG1, 
+                         ( Read( REG_LR_MODEMCONFIG1 ) &
+                           RFLR_MODEMCONFIG1_BW_MASK &
+                           RFLR_MODEMCONFIG1_CODINGRATE_MASK &
+                           RFLR_MODEMCONFIG1_IMPLICITHEADER_MASK ) |
+                           ( bandwidth << 4 ) | ( coderate << 1 ) | 
+                           fixLen );
+
+            Write( REG_LR_MODEMCONFIG2,
+                         ( Read( REG_LR_MODEMCONFIG2 ) &
+                           RFLR_MODEMCONFIG2_SF_MASK &
+                           RFLR_MODEMCONFIG2_RXPAYLOADCRC_MASK ) |
+                           ( datarate << 4 ) | ( crcOn << 2 ) );
+
+            Write( REG_LR_MODEMCONFIG3, 
+                         ( Read( REG_LR_MODEMCONFIG3 ) &
+                           RFLR_MODEMCONFIG3_LOWDATARATEOPTIMIZE_MASK ) |
+                           ( this->settings.LoRa.LowDatarateOptimize << 3 ) );
+        
+            Write( REG_LR_PREAMBLEMSB, ( preambleLen >> 8 ) & 0x00FF );
+            Write( REG_LR_PREAMBLELSB, preambleLen & 0xFF );
+            
+            if( datarate == 6 )
+            {
+                Write( REG_LR_DETECTOPTIMIZE, 
+                             ( Read( REG_LR_DETECTOPTIMIZE ) &
+                               RFLR_DETECTIONOPTIMIZE_MASK ) |
+                               RFLR_DETECTIONOPTIMIZE_SF6 );
+                Write( REG_LR_DETECTIONTHRESHOLD, 
+                             RFLR_DETECTIONTHRESH_SF6 );
+            }
+            else
+            {
+                Write( REG_LR_DETECTOPTIMIZE,
+                             ( Read( REG_LR_DETECTOPTIMIZE ) &
+                             RFLR_DETECTIONOPTIMIZE_MASK ) |
+                             RFLR_DETECTIONOPTIMIZE_SF7_TO_SF12 );
+                Write( REG_LR_DETECTIONTHRESHOLD, 
+                             RFLR_DETECTIONTHRESH_SF7_TO_SF12 );
+            }
+        }
+        break;
+    }
+}
+
+double SX1276::TimeOnAir( ModemType modem, uint8_t pktLen )
+{
+    double airTime = 0.0;
+
+    switch( modem )
+    {
+    case MODEM_FSK:
+        {
+            airTime = floor( ( 8 * ( this->settings.Fsk.PreambleLen +
+                                     ( ( Read( REG_SYNCCONFIG ) & ~RF_SYNCCONFIG_SYNCSIZE_MASK ) + 1 ) +
+                                     ( ( this->settings.Fsk.FixLen == 0x01 ) ? 0.0 : 1.0 ) +
+                                     ( ( ( Read( REG_PACKETCONFIG1 ) & ~RF_PACKETCONFIG1_ADDRSFILTERING_MASK ) != 0x00 ) ? 1.0 : 0 ) +
+                                     pktLen +
+                                     ( ( this->settings.Fsk.CrcOn == 0x01 ) ? 2.0 : 0 ) ) /
+                                     this->settings.Fsk.Datarate ) * 1e6 );
+        }
+        break;
+    case MODEM_LORA:
+        {
+            double bw = 0.0;
+            // REMARK: When using LoRa modem only bandwidths 125, 250 and 500 kHz are supported
+            switch( this->settings.LoRa.Bandwidth )
+            {
+            //case 0: // 7.8 kHz
+            //    bw = 78e2;
+            //    break;
+            //case 1: // 10.4 kHz
+            //    bw = 104e2;
+            //    break;
+            //case 2: // 15.6 kHz
+            //    bw = 156e2;
+            //    break;
+            //case 3: // 20.8 kHz
+            //    bw = 208e2;
+            //    break;
+            //case 4: // 31.2 kHz
+            //    bw = 312e2;
+            //    break;
+            //case 5: // 41.4 kHz
+            //    bw = 414e2;
+            //    break;
+            //case 6: // 62.5 kHz
+            //    bw = 625e2;
+            //    break;
+            case 7: // 125 kHz
+                bw = 125e3;
+                break;
+            case 8: // 250 kHz
+                bw = 250e3;
+                break;
+            case 9: // 500 kHz
+                bw = 500e3;
+                break;
+            }
+
+            // Symbol rate : time for one symbol (secs)
+            double rs = bw / ( 1 << this->settings.LoRa.Datarate );
+            double ts = 1 / rs;
+            // time of preamble
+            double tPreamble = ( this->settings.LoRa.PreambleLen + 4.25 ) * ts;
+            // Symbol length of payload and time
+            double tmp = ceil( ( 8 * pktLen - 4 * this->settings.LoRa.Datarate +
+                                 28 + 16 * this->settings.LoRa.CrcOn -
+                                 ( this->settings.LoRa.FixLen ? 20 : 0 ) ) /
+                                 ( double )( 4 * this->settings.LoRa.Datarate -
+                                 ( ( this->settings.LoRa.LowDatarateOptimize > 0 ) ? 8 : 0 ) ) ) *
+                                 ( this->settings.LoRa.Coderate + 4 );
+            double nPayload = 8 + ( ( tmp > 0 ) ? tmp : 0 );
+            double tPayload = nPayload * ts;
+            // Time on air 
+            double tOnAir = tPreamble + tPayload;
+            // return us secs
+            airTime = floor( tOnAir * 1e6 + 0.999 );
+        }
+        break;
+    }
+    return airTime;
+}
+
+void SX1276::Send( uint8_t *buffer, uint8_t size )
+{
+    uint32_t txTimeout = 0;
+
+    switch( this->settings.Modem )
+    {
+    case MODEM_FSK:
+        {
+            this->settings.FskPacketHandler.NbBytes = 0;
+            this->settings.FskPacketHandler.Size = size;
+
+            if( this->settings.Fsk.FixLen == false )
+            {
+                WriteFifo( ( uint8_t* )&size, 1 );
+            }
+            else
+            {
+                Write( REG_PAYLOADLENGTH, size );
+            }            
+            
+            if( ( size > 0 ) && ( size <= 64 ) )
+            {
+                this->settings.FskPacketHandler.ChunkSize = size;
+            }
+            else
+            {
+                this->settings.FskPacketHandler.ChunkSize = 32;
+            }
+
+            // Write payload buffer
+            WriteFifo( buffer, this->settings.FskPacketHandler.ChunkSize );
+            this->settings.FskPacketHandler.NbBytes += this->settings.FskPacketHandler.ChunkSize;
+            txTimeout = this->settings.Fsk.TxTimeout;
+        }
+        break;
+    case MODEM_LORA:
+        {
+            if( this->settings.LoRa.IqInverted == true )
+            {
+                Write( REG_LR_INVERTIQ, ( ( Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_OFF | RFLR_INVERTIQ_TX_ON ) );
+            }
+            else
+            {
+                Write( REG_LR_INVERTIQ, ( ( Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_OFF | RFLR_INVERTIQ_TX_OFF ) );
+            }      
+        
+            this->settings.LoRaPacketHandler.Size = size;
+
+            // Initializes the payload size
+            Write( REG_LR_PAYLOADLENGTH, size );
+
+            // Full buffer used for Tx            
+            Write( REG_LR_FIFOTXBASEADDR, 0 );
+            Write( REG_LR_FIFOADDRPTR, 0 );
+
+            // FIFO operations can not take place in Sleep mode
+            if( ( Read( REG_OPMODE ) & ~RF_OPMODE_MASK ) == RF_OPMODE_SLEEP )
+            {
+                Standby( );
+                wait( 0.001 );
+            }
+            // Write payload buffer
+            WriteFifo( buffer, size );
+            txTimeout = this->settings.LoRa.TxTimeout;
+        }
+        break;
+    }
+
+    Tx( txTimeout );
+}
+
+void SX1276::Sleep( void )
+{
+        // Initialize driver timeout timers
+   	txTimeoutTimer.detach(  );
+    rxTimeoutTimer.detach( );
+    SetOpMode( RF_OPMODE_SLEEP );
+}
+
+void SX1276::Standby( void )
+{
+    txTimeoutTimer.detach(  );
+    rxTimeoutTimer.detach( );
+    SetOpMode( RF_OPMODE_STANDBY );
+}
+
+void SX1276::Rx( uint32_t timeout )
+{
+    bool rxContinuous = false;
+    
+    switch( this->settings.Modem )
+    {
+    case MODEM_FSK:
+        {
+            rxContinuous = this->settings.Fsk.RxContinuous;
+            
+            // DIO0=PayloadReady
+            // DIO1=FifoLevel
+            // DIO2=SyncAddr
+            // DIO3=FifoEmpty
+            // DIO4=Preamble
+            // DIO5=ModeReady
+            Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RF_DIOMAPPING1_DIO0_MASK &
+                                                                            RF_DIOMAPPING1_DIO2_MASK ) |
+                                                                            RF_DIOMAPPING1_DIO0_00 |
+                                                                            RF_DIOMAPPING1_DIO2_11 );
+            
+            Write( REG_DIOMAPPING2, ( Read( REG_DIOMAPPING2 ) & RF_DIOMAPPING2_DIO4_MASK &
+                                                                            RF_DIOMAPPING2_MAP_MASK ) | 
+                                                                            RF_DIOMAPPING2_DIO4_11 |
+                                                                            RF_DIOMAPPING2_MAP_PREAMBLEDETECT );
+            
+            this->settings.FskPacketHandler.FifoThresh = Read( REG_FIFOTHRESH ) & 0x3F;
+            
+            this->settings.FskPacketHandler.PreambleDetected = false;
+            this->settings.FskPacketHandler.SyncWordDetected = false;
+            this->settings.FskPacketHandler.NbBytes = 0;
+            this->settings.FskPacketHandler.Size = 0;
+        }
+        break;
+    case MODEM_LORA:
+        {
+            if( this->settings.LoRa.IqInverted == true )
+            {
+                Write( REG_LR_INVERTIQ, ( ( Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_ON | RFLR_INVERTIQ_TX_OFF ) );
+            }
+            else
+            {
+                Write( REG_LR_INVERTIQ, ( ( Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_OFF | RFLR_INVERTIQ_TX_OFF ) );
+            }         
+        
+            rxContinuous = this->settings.LoRa.RxContinuous;
+            
+            Write( REG_LR_IRQFLAGSMASK, //RFLR_IRQFLAGS_RXTIMEOUT |
+                                              //RFLR_IRQFLAGS_RXDONE |
+                                              //RFLR_IRQFLAGS_PAYLOADCRCERROR |
+                                              //RFLR_IRQFLAGS_VALIDHEADER |
+                                              RFLR_IRQFLAGS_TXDONE |
+                                              RFLR_IRQFLAGS_CADDONE |
+                                              RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL |
+                                              RFLR_IRQFLAGS_CADDETECTED );
+            
+            // DIO0=RxDone
+            Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK ) | RFLR_DIOMAPPING1_DIO0_00 );
+            Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO3_MASK ) | RFLR_DIOMAPPING1_DIO3_01 );
+            Write( REG_LR_FIFORXBASEADDR, 0 );
+            Write( REG_LR_FIFOADDRPTR, 0 );
+        }
+        break;
+    }
+
+    memset( rxBuffer, 0, ( size_t )RX_BUFFER_SIZE );
+
+    this->settings.State = RX;
+    if( timeout != 0 )
+    {
+        rxTimeoutTimer.attach_us( this, &SX1276::OnTimeoutIrq, timeout );
+    }
+
+    if( this->settings.Modem == MODEM_FSK )
+    {
+        SetOpMode( RF_OPMODE_RECEIVER );
+        
+        if( rxContinuous == false )
+        {
+            rxTimeoutSyncWord.attach_us( this, &SX1276::OnTimeoutIrq, ( 8.0 * ( this->settings.Fsk.PreambleLen +
+                                                         ( ( Read( REG_SYNCCONFIG ) &
+                                                            ~RF_SYNCCONFIG_SYNCSIZE_MASK ) +
+                                                         1.0 ) + 1.0 ) /
+                                                        ( double )this->settings.Fsk.Datarate ) * 1e6 ) ;
+        }
+    }
+    else
+    {
+        if( rxContinuous == true )
+        {
+            SetOpMode( RFLR_OPMODE_RECEIVER );
+        }
+        else
+        {
+            SetOpMode( RFLR_OPMODE_RECEIVER_SINGLE );
+        }
+    }
+}
+
+void SX1276::Tx( uint32_t timeout )
+{ 
+    switch( this->settings.Modem )
+    {
+    case MODEM_FSK:
+        {
+            // DIO0=PacketSent
+            // DIO1=FifoLevel
+            // DIO2=FifoFull
+            // DIO3=FifoEmpty
+            // DIO4=LowBat
+            // DIO5=ModeReady
+            Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RF_DIOMAPPING1_DIO0_MASK &
+                                                                            RF_DIOMAPPING1_DIO2_MASK ) );
+
+            Write( REG_DIOMAPPING2, ( Read( REG_DIOMAPPING2 ) & RF_DIOMAPPING2_DIO4_MASK &
+                                                                            RF_DIOMAPPING2_MAP_MASK ) );
+            this->settings.FskPacketHandler.FifoThresh = Read( REG_FIFOTHRESH ) & 0x3F;
+        }
+        break;
+    case MODEM_LORA:
+        {
+            Write( REG_LR_IRQFLAGSMASK, RFLR_IRQFLAGS_RXTIMEOUT |
+                                              RFLR_IRQFLAGS_RXDONE |
+                                              RFLR_IRQFLAGS_PAYLOADCRCERROR |
+                                              RFLR_IRQFLAGS_VALIDHEADER |
+                                              //RFLR_IRQFLAGS_TXDONE |
+                                              RFLR_IRQFLAGS_CADDONE |
+                                              RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL |
+                                              RFLR_IRQFLAGS_CADDETECTED );
+
+            // DIO0=TxDone
+            Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK ) | RFLR_DIOMAPPING1_DIO0_01 );
+        }
+        break;
+    }
+
+    this->settings.State = TX;
+	txTimeoutTimer.attach_us( this, &SX1276::OnTimeoutIrq, timeout );
+    SetOpMode( RF_OPMODE_TRANSMITTER );
+}
+
+int8_t SX1276::GetRssi( ModemType modem )
+{
+    int8_t rssi = 0;
+
+    switch( modem )
+    {
+    case MODEM_FSK:
+        rssi = -( Read( REG_RSSIVALUE ) >> 1 );
+        break;
+    case MODEM_LORA:
+        if( this->settings.Channel > RF_MID_BAND_THRESH )
+        {
+            rssi = RSSI_OFFSET_HF + Read( REG_LR_RSSIVALUE );
+        }
+        else
+        {
+            rssi = RSSI_OFFSET_LF + Read( REG_LR_RSSIVALUE );
+        }
+        break;
+    default:
+        rssi = -1;
+        break;
+    }
+    return rssi;
+}
+
+void SX1276::SetOpMode( uint8_t opMode )
+{
+    if( opMode != previousOpMode )
+    {
+        previousOpMode = opMode;
+        if( opMode == RF_OPMODE_SLEEP )
+        {
+            SetAntSwLowPower( true );
+        }
+        else
+        {
+            SetAntSwLowPower( false );
+            if( opMode == RF_OPMODE_TRANSMITTER )
+            {
+                 SetAntSw( 1 );
+            }
+            else
+            {
+                 SetAntSw( 0 );
+            }
+        }
+        Write( REG_OPMODE, ( Read( REG_OPMODE ) & RF_OPMODE_MASK ) | opMode );
+    }
+}
+
+void SX1276::SetModem( ModemType modem )
+{
+    if( this->settings.Modem == modem )
+    {
+        return;
+    }
+
+    this->settings.Modem = modem;
+    switch( this->settings.Modem )
+    {
+    default:
+    case MODEM_FSK:
+        SetOpMode( RF_OPMODE_SLEEP );
+        Write( REG_OPMODE, ( Read( REG_OPMODE ) & RFLR_OPMODE_LONGRANGEMODE_MASK ) | RFLR_OPMODE_LONGRANGEMODE_OFF );
+    
+        Write( REG_DIOMAPPING1, 0x00 );
+        Write( REG_DIOMAPPING2, 0x30 ); // DIO5=ModeReady
+        break;
+    case MODEM_LORA:
+        SetOpMode( RF_OPMODE_SLEEP );
+        Write( REG_OPMODE, ( Read( REG_OPMODE ) & RFLR_OPMODE_LONGRANGEMODE_MASK ) | RFLR_OPMODE_LONGRANGEMODE_ON );
+
+        Write( REG_DIOMAPPING1, 0x00 );
+        Write( REG_DIOMAPPING2, 0x00 );
+        break;
+    }
+}
+
+void SX1276::OnTimeoutIrq( void )
+{
+    RadioState state = IDLE;
+
+    switch( this->settings.State )
+    {
+    case RX:
+        if( this->settings.Modem == MODEM_FSK )
+        {
+            this->settings.FskPacketHandler.PreambleDetected = false;
+            this->settings.FskPacketHandler.SyncWordDetected = false;
+            this->settings.FskPacketHandler.NbBytes = 0;
+            this->settings.FskPacketHandler.Size = 0;
+
+            // Clear Irqs
+            Write( REG_IRQFLAGS1, RF_IRQFLAGS1_RSSI | 
+                                        RF_IRQFLAGS1_PREAMBLEDETECT |
+                                        RF_IRQFLAGS1_SYNCADDRESSMATCH );
+            Write( REG_IRQFLAGS2, RF_IRQFLAGS2_FIFOOVERRUN );
+
+            if( this->settings.Fsk.RxContinuous == true )
+            {
+                state = this->settings.State;
+                // Continuous mode restart Rx chain
+                Write( REG_RXCONFIG, Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK );
+            }
+            else
+            {
+                rxTimeoutSyncWord.attach_us( this, &SX1276::OnTimeoutIrq, ( 8.0 * ( this->settings.Fsk.PreambleLen +
+                                                         ( ( Read( REG_SYNCCONFIG ) &
+                                                            ~RF_SYNCCONFIG_SYNCSIZE_MASK ) +
+                                                         1.0 ) + 1.0 ) /
+                                                        ( double )this->settings.Fsk.Datarate ) * 1e6 ) ;
+            }
+        }
+        if( ( rxTimeout != NULL ) )
+        {
+            rxTimeout( );
+        }
+        break;
+    case TX:
+        if( ( txTimeout != NULL ) )
+        {
+            txTimeout( );
+        }
+        break;
+    default:
+        break;
+    }
+    this->settings.State = state;
+}
+
+void SX1276::OnDio0Irq( void )
+{
+    __IO uint8_t irqFlags = 0;
+  
+    switch( this->settings.State )
+    {                
+        case RX:
+            //TimerStop( &RxTimeoutTimer );
+            // RxDone interrupt
+            switch( this->settings.Modem )
+            {
+            case MODEM_FSK:
+                irqFlags = Read( REG_IRQFLAGS2 );
+                if( ( irqFlags & RF_IRQFLAGS2_CRCOK ) != RF_IRQFLAGS2_CRCOK )
+                {
+                    // Clear Irqs
+                    Write( REG_IRQFLAGS1, RF_IRQFLAGS1_RSSI | 
+                                                RF_IRQFLAGS1_PREAMBLEDETECT |
+                                                RF_IRQFLAGS1_SYNCADDRESSMATCH );
+                    Write( REG_IRQFLAGS2, RF_IRQFLAGS2_FIFOOVERRUN );
+
+                    if( this->settings.Fsk.RxContinuous == false )
+                    {
+                        this->settings.State = IDLE;
+                        rxTimeoutSyncWord.attach_us( this, &SX1276::OnTimeoutIrq, (  8.0 * ( this->settings.Fsk.PreambleLen +
+                                                         ( ( Read( REG_SYNCCONFIG ) &
+                                                            ~RF_SYNCCONFIG_SYNCSIZE_MASK ) +
+                                                         1.0 ) + 1.0 ) /
+                                                        ( double )this->settings.Fsk.Datarate ) * 1e6 ) ;
+                    }
+                    else
+                    {
+                        // Continuous mode restart Rx chain
+                        Write( REG_RXCONFIG, Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK );
+                    }
+                    rxTimeoutTimer.detach( );
+
+                    if( ( rxError != NULL ) )
+                    {
+                        rxError( ); 
+                    }
+                    this->settings.FskPacketHandler.PreambleDetected = false;
+                    this->settings.FskPacketHandler.SyncWordDetected = false;
+                    this->settings.FskPacketHandler.NbBytes = 0;
+                    this->settings.FskPacketHandler.Size = 0;
+                    break;
+                }
+
+                // Read received packet size
+                if( ( this->settings.FskPacketHandler.Size == 0 ) && ( this->settings.FskPacketHandler.NbBytes == 0 ) )
+                {
+                    if( this->settings.Fsk.FixLen == false )
+                    {
+                        ReadFifo( ( uint8_t* )&this->settings.FskPacketHandler.Size, 1 );
+                    }
+                    else
+                    {
+                        this->settings.FskPacketHandler.Size = Read( REG_PAYLOADLENGTH );
+                    }
+                    ReadFifo( rxBuffer + this->settings.FskPacketHandler.NbBytes, this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes );
+                    this->settings.FskPacketHandler.NbBytes += ( this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes );
+                }
+                else
+                {
+                    ReadFifo( rxBuffer + this->settings.FskPacketHandler.NbBytes, this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes );
+                    this->settings.FskPacketHandler.NbBytes += ( this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes );
+                }
+
+                if( this->settings.Fsk.RxContinuous == false )
+                {
+                    this->settings.State = IDLE;
+                    rxTimeoutSyncWord.attach_us( this, &SX1276::OnTimeoutIrq, ( 8.0 * ( this->settings.Fsk.PreambleLen +
+                                                         ( ( Read( REG_SYNCCONFIG ) &
+                                                            ~RF_SYNCCONFIG_SYNCSIZE_MASK ) +
+                                                         1.0 ) + 1.0 ) /
+                                                        ( double )this->settings.Fsk.Datarate ) * 1e6 ) ;
+                }
+                else
+                {
+                    // Continuous mode restart Rx chain
+                    Write( REG_RXCONFIG, Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK );
+                }
+                rxTimeoutTimer.detach( );
+
+                if( (rxDone != NULL ) )
+                {
+                    rxDone( rxBuffer, this->settings.FskPacketHandler.Size, this->settings.FskPacketHandler.RssiValue, 0 ); 
+                } 
+                this->settings.FskPacketHandler.PreambleDetected = false;
+                this->settings.FskPacketHandler.SyncWordDetected = false;
+                this->settings.FskPacketHandler.NbBytes = 0;
+                this->settings.FskPacketHandler.Size = 0;
+                break;
+            case MODEM_LORA:
+                {
+                    uint8_t snr = 0;
+
+                    // Clear Irq
+                    Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_RXDONE );
+
+                    irqFlags = Read( REG_LR_IRQFLAGS );
+                    if( ( irqFlags & RFLR_IRQFLAGS_PAYLOADCRCERROR_MASK ) == RFLR_IRQFLAGS_PAYLOADCRCERROR )
+                    {
+                        // Clear Irq
+                        Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_PAYLOADCRCERROR );
+
+                        if( this->settings.LoRa.RxContinuous == false )
+                        {
+                            this->settings.State = IDLE;
+                        }
+                        rxTimeoutTimer.detach( );
+
+                        if( (rxError != NULL ) )
+                        {
+                            rxError( ); 
+                        }
+                        break;
+                    }
+
+                    this->settings.LoRaPacketHandler.SnrValue = Read( REG_LR_PKTSNRVALUE );
+                    if( this->settings.LoRaPacketHandler.SnrValue & 0x80 ) // The SNR sign bit is 1
+                    {
+                        // Invert and divide by 4
+                        snr = ( ( ~this->settings.LoRaPacketHandler.SnrValue + 1 ) & 0xFF ) >> 2;
+                        snr = -snr;
+                    }
+                    else
+                    {
+                        // Divide by 4
+                        snr = ( this->settings.LoRaPacketHandler.SnrValue & 0xFF ) >> 2;
+                    }
+
+                    int8_t rssi = Read( REG_LR_PKTRSSIVALUE );
+                    if( this->settings.LoRaPacketHandler.SnrValue < 0 )
+                    {
+                        if( this->settings.Channel > RF_MID_BAND_THRESH )
+                        {
+                            this->settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_HF + rssi + ( rssi >> 4 ) +
+                                                                          snr;
+                        }
+                        else
+                        {
+                            this->settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_LF + rssi + ( rssi >> 4 ) +
+                                                                          snr;
+                        }
+                    }
+                    else
+                    {    
+                        if( this->settings.Channel > RF_MID_BAND_THRESH )
+                        {
+                            this->settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_HF + rssi + ( rssi >> 4 );
+                        }
+                        else
+                        {
+                            this->settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_LF + rssi + ( rssi >> 4 );
+                        }
+                    }
+
+                    this->settings.LoRaPacketHandler.Size = Read( REG_LR_RXNBBYTES );
+                    ReadFifo( rxBuffer, this->settings.LoRaPacketHandler.Size );
+                
+                    if( this->settings.LoRa.RxContinuous == false )
+                    {
+                        this->settings.State = IDLE;
+                    }
+                    rxTimeoutTimer.detach( );
+
+                    if( ( rxDone != NULL ) )
+                    {
+                        rxDone( rxBuffer, this->settings.LoRaPacketHandler.Size, this->settings.LoRaPacketHandler.RssiValue, this->settings.LoRaPacketHandler.SnrValue );
+                    }
+                }
+                break;
+            default:
+                break;
+            }
+            break;
+        case TX:
+            txTimeoutTimer.detach(  );
+            // TxDone interrupt
+            switch( this->settings.Modem )
+            {
+            case MODEM_LORA:
+                // Clear Irq
+                Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_TXDONE );
+                // Intentional fall through
+            case MODEM_FSK:
+            default:
+                this->settings.State = IDLE;
+                if( ( txDone != NULL ) )
+                {
+                    txDone( ); 
+                } 
+                break;
+            }
+            break;
+        default:
+            break;
+    }
+}
+
+void SX1276::OnDio1Irq( void )
+{
+    switch( this->settings.State )
+    {                
+        case RX:
+            switch( this->settings.Modem )
+            {
+            case MODEM_FSK:
+                // FifoLevel interrupt
+                // Read received packet size
+                if( ( this->settings.FskPacketHandler.Size == 0 ) && ( this->settings.FskPacketHandler.NbBytes == 0 ) )
+                {
+                    if( this->settings.Fsk.FixLen == false )
+                    {
+                        ReadFifo( ( uint8_t* )&this->settings.FskPacketHandler.Size, 1 );
+                    }
+                    else
+                    {
+                        this->settings.FskPacketHandler.Size = Read( REG_PAYLOADLENGTH );
+                    }
+                }
+
+                if( ( this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes ) > this->settings.FskPacketHandler.FifoThresh )
+                {
+                    ReadFifo( ( rxBuffer + this->settings.FskPacketHandler.NbBytes ), this->settings.FskPacketHandler.FifoThresh );
+                    this->settings.FskPacketHandler.NbBytes += this->settings.FskPacketHandler.FifoThresh;
+                }
+                else
+                {
+                    ReadFifo( ( rxBuffer + this->settings.FskPacketHandler.NbBytes ), this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes );
+                    this->settings.FskPacketHandler.NbBytes += ( this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes );
+                }
+                break;
+            case MODEM_LORA:
+                // Sync time out
+                rxTimeoutTimer.detach( );
+                this->settings.State = IDLE;
+                if( ( rxTimeout != NULL ) )
+                {
+                    rxTimeout( );
+                }
+                break;
+            default:
+                break;
+            }
+            break;
+        case TX:
+            switch( this->settings.Modem )
+            {
+            case MODEM_FSK:
+                // FifoLevel interrupt
+                if( ( this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes ) > this->settings.FskPacketHandler.ChunkSize )
+                {
+                    WriteFifo( ( rxBuffer + this->settings.FskPacketHandler.NbBytes ), this->settings.FskPacketHandler.ChunkSize );
+                    this->settings.FskPacketHandler.NbBytes += this->settings.FskPacketHandler.ChunkSize;
+                }
+                else 
+                {
+                    // Write the last chunk of data
+                    WriteFifo( rxBuffer + this->settings.FskPacketHandler.NbBytes, this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes );
+                    this->settings.FskPacketHandler.NbBytes += this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes;
+                }
+                break;
+            case MODEM_LORA:
+                break;
+            default:
+                break;
+            }
+            break;      
+        default:
+            break;
+    }
+}
+
+void SX1276::OnDio2Irq( void )
+{
+    switch( this->settings.State )
+    {                
+        case RX:
+            switch( this->settings.Modem )
+            {
+            case MODEM_FSK:
+                if( ( this->settings.FskPacketHandler.PreambleDetected == true ) && ( this->settings.FskPacketHandler.SyncWordDetected == false ) )
+                {
+                    rxTimeoutSyncWord.detach( );
+                    
+                    this->settings.FskPacketHandler.SyncWordDetected = true;
+                
+                    this->settings.FskPacketHandler.RssiValue = -( Read( REG_RSSIVALUE ) >> 1 );
+
+                    this->settings.FskPacketHandler.AfcValue = ( int32_t )( double )( ( ( uint16_t )Read( REG_AFCMSB ) << 8 ) |
+                                                                           ( uint16_t )Read( REG_AFCLSB ) ) *
+                                                                           ( double )FREQ_STEP;
+                    this->settings.FskPacketHandler.RxGain = ( Read( REG_LNA ) >> 5 ) & 0x07;
+                }
+                break;
+            case MODEM_LORA:
+                break;
+            default:
+                break;
+            }
+            break;
+        case TX:
+            switch( this->settings.Modem )
+            {
+            case MODEM_FSK:
+                break;
+            case MODEM_LORA:
+                break;
+            default:
+                break;
+            }
+            break;      
+        default:
+            break;
+    }
+}
+
+void SX1276::OnDio3Irq( void )
+{
+    switch( this->settings.Modem )
+    {
+    case MODEM_FSK:
+        break;
+    case MODEM_LORA:
+        break;
+    default:
+        break;
+    }
+}
+
+void SX1276::OnDio4Irq( void )
+{
+    switch( this->settings.Modem )
+    {
+    case MODEM_FSK:
+        {
+            if( this->settings.FskPacketHandler.PreambleDetected == false )
+            {
+                this->settings.FskPacketHandler.PreambleDetected = true;
+            }    
+        }
+        break;
+    case MODEM_LORA:
+        break;
+    default:
+        break;
+    }
+}
+
+void SX1276::OnDio5Irq( void )
+{
+    switch( this->settings.Modem )
+    {
+    case MODEM_FSK:
+        break;
+    case MODEM_LORA:
+        break;
+    default:
+        break;
+    }
+}
\ No newline at end of file