li lei
1
Diff: sx1276/sx1276.cpp
- Revision:
- 0:7e14d7c443f1
diff -r 000000000000 -r 7e14d7c443f1 sx1276/sx1276.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sx1276/sx1276.cpp Sat Oct 08 02:35:14 2016 +0000
@@ -0,0 +1,1545 @@
+/*
+ / _____) _ | |
+( (____ _____ ____ _| |_ _____ ____| |__
+ \____ \| ___ | (_ _) ___ |/ ___) _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+ (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"
+
+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 },
+ { 300000, 0x00 }, // Invalid Badwidth
+};
+
+
+SX1276::SX1276( RadioEvents_t *events,
+ PinName mosi, PinName miso, PinName sclk, PinName nss, PinName reset,
+ PinName dio0, PinName dio1, PinName dio2, PinName dio3, PinName dio4, PinName dio5 )
+ : Radio( events ),
+ 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->RadioEvents = events;
+
+ 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;
+
+ this->settings.State = RF_IDLE;
+}
+
+SX1276::~SX1276( )
+{
+ delete this->rxBuffer;
+ delete this->dioIrq;
+}
+
+void SX1276::Init( RadioEvents_t *events )
+{
+ this->RadioEvents = events;
+}
+
+RadioState SX1276::GetStatus( 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( RadioModems_t modem, uint32_t freq, int16_t rssiThresh )
+{
+ int16_t rssi = 0;
+
+ SetModem( modem );
+
+ SetChannel( freq );
+
+ SetOpMode( RF_OPMODE_RECEIVER );
+
+ wait_ms( 1 );
+
+ 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_ms( 1 );
+ // Unfiltered RSSI value reading. Only takes the LSB value
+ rnd |= ( ( uint32_t )Read( REG_LR_RSSIWIDEBAND ) & 0x01 ) << i;
+ }
+
+ Sleep( );
+
+ return rnd;
+}
+
+/*!
+ * Performs the Rx chain calibration for LF and HF bands
+ * \remark Must be called just after the reset so all registers are at their
+ * default values
+ */
+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
+ SetChannel( 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 );
+}
+
+/*!
+ * 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( RadioModems_t modem, uint32_t bandwidth,
+ uint32_t datarate, uint8_t coderate,
+ uint32_t bandwidthAfc, uint16_t preambleLen,
+ uint16_t symbTimeout, bool fixLen,
+ uint8_t payloadLen,
+ bool crcOn, bool freqHopOn, uint8_t hopPeriod,
+ 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.PayloadLen = payloadLen;
+ 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_PREAMBLEMSB, ( uint8_t )( ( preambleLen >> 8 ) & 0xFF ) );
+ Write( REG_PREAMBLELSB, ( uint8_t )( preambleLen & 0xFF ) );
+
+ if( fixLen == 1 )
+ {
+ Write( REG_PAYLOADLENGTH, payloadLen );
+ }
+
+ 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.PreambleLen = preambleLen;
+ this->settings.LoRa.FixLen = fixLen;
+ this->settings.LoRa.PayloadLen = payloadLen;
+ this->settings.LoRa.CrcOn = crcOn;
+ this->settings.LoRa.FreqHopOn = freqHopOn;
+ this->settings.LoRa.HopPeriod = hopPeriod;
+ 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( fixLen == 1 )
+ {
+ Write( REG_LR_PAYLOADLENGTH, payloadLen );
+ }
+
+ if( this->settings.LoRa.FreqHopOn == true )
+ {
+ Write( REG_LR_PLLHOP, ( Read( REG_LR_PLLHOP ) & RFLR_PLLHOP_FASTHOP_MASK ) | RFLR_PLLHOP_FASTHOP_ON );
+ Write( REG_LR_HOPPERIOD, this->settings.LoRa.HopPeriod );
+ }
+
+ if( ( bandwidth == 9 ) && ( RF_MID_BAND_THRESH ) )
+ {
+ // ERRATA 2.1 - Sensitivity Optimization with a 500 kHz Bandwidth
+ Write( REG_LR_TEST36, 0x02 );
+ Write( REG_LR_TEST3A, 0x64 );
+ }
+ else if( bandwidth == 9 )
+ {
+ // ERRATA 2.1 - Sensitivity Optimization with a 500 kHz Bandwidth
+ Write( REG_LR_TEST36, 0x02 );
+ Write( REG_LR_TEST3A, 0x7F );
+ }
+ else
+ {
+ // ERRATA 2.1 - Sensitivity Optimization with a 500 kHz Bandwidth
+ Write( REG_LR_TEST36, 0x03 );
+ }
+
+ 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( RadioModems_t modem, int8_t power, uint32_t fdev,
+ uint32_t bandwidth, uint32_t datarate,
+ uint8_t coderate, uint16_t preambleLen,
+ bool fixLen, bool crcOn, bool freqHopOn,
+ uint8_t hopPeriod, 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 ) | 0x80;
+
+ 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.FreqHopOn = freqHopOn;
+ this->settings.LoRa.HopPeriod = hopPeriod;
+ 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;
+ }
+
+ if( this->settings.LoRa.FreqHopOn == true )
+ {
+ Write( REG_LR_PLLHOP, ( Read( REG_LR_PLLHOP ) & RFLR_PLLHOP_FASTHOP_MASK ) | RFLR_PLLHOP_FASTHOP_ON );
+ Write( REG_LR_HOPPERIOD, this->settings.LoRa.HopPeriod );
+ }
+
+ 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( RadioModems_t modem, uint8_t pktLen )
+{
+ uint32_t airTime = 0;
+
+ switch( modem )
+ {
+ case MODEM_FSK:
+ {
+ airTime = rint( ( 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 ) ? 2 : 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 ) );
+ Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_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 ) );
+ Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_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_ms( 1 );
+ }
+ // Write payload buffer
+ WriteFifo( buffer, size );
+ txTimeout = this->settings.LoRa.TxTimeout;
+ }
+ break;
+ }
+
+ Tx( txTimeout );
+}
+
+void SX1276::Sleep( void )
+{
+ txTimeoutTimer.detach( );
+ rxTimeoutTimer.detach( );
+
+ SetOpMode( RF_OPMODE_SLEEP );
+ this->settings.State = RF_IDLE;
+}
+
+void SX1276::Standby( void )
+{
+ txTimeoutTimer.detach( );
+ rxTimeoutTimer.detach( );
+
+ SetOpMode( RF_OPMODE_STANDBY );
+ this->settings.State = RF_IDLE;
+}
+
+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 ) );
+ Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_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 ) );
+ Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_OFF );
+ }
+
+
+ // ERRATA 2.3 - Receiver Spurious Reception of a LoRa Signal
+ if( this->settings.LoRa.Bandwidth < 9 )
+ {
+ Write( REG_LR_DETECTOPTIMIZE, Read( REG_LR_DETECTOPTIMIZE ) & 0x7F );
+ Write( REG_LR_TEST30, 0x00 );
+ switch( this->settings.LoRa.Bandwidth )
+ {
+ case 0: // 7.8 kHz
+ Write( REG_LR_TEST2F, 0x48 );
+ SetChannel(this->settings.Channel + 7.81e3 );
+ break;
+ case 1: // 10.4 kHz
+ Write( REG_LR_TEST2F, 0x44 );
+ SetChannel(this->settings.Channel + 10.42e3 );
+ break;
+ case 2: // 15.6 kHz
+ Write( REG_LR_TEST2F, 0x44 );
+ SetChannel(this->settings.Channel + 15.62e3 );
+ break;
+ case 3: // 20.8 kHz
+ Write( REG_LR_TEST2F, 0x44 );
+ SetChannel(this->settings.Channel + 20.83e3 );
+ break;
+ case 4: // 31.2 kHz
+ Write( REG_LR_TEST2F, 0x44 );
+ SetChannel(this->settings.Channel + 31.25e3 );
+ break;
+ case 5: // 41.4 kHz
+ Write( REG_LR_TEST2F, 0x44 );
+ SetChannel(this->settings.Channel + 41.67e3 );
+ break;
+ case 6: // 62.5 kHz
+ Write( REG_LR_TEST2F, 0x40 );
+ break;
+ case 7: // 125 kHz
+ Write( REG_LR_TEST2F, 0x40 );
+ break;
+ case 8: // 250 kHz
+ Write( REG_LR_TEST2F, 0x40 );
+ break;
+ }
+ }
+ else
+ {
+ Write( REG_LR_DETECTOPTIMIZE, Read( REG_LR_DETECTOPTIMIZE ) | 0x80 );
+ }
+
+ rxContinuous = this->settings.LoRa.RxContinuous;
+
+ if( this->settings.LoRa.FreqHopOn == true )
+ {
+ 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, DIO2=FhssChangeChannel
+ Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK & RFLR_DIOMAPPING1_DIO2_MASK ) | RFLR_DIOMAPPING1_DIO0_00 | RFLR_DIOMAPPING1_DIO2_00 );
+ }
+ else
+ {
+ 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_LR_FIFORXBASEADDR, 0 );
+ Write( REG_LR_FIFOADDRPTR, 0 );
+ }
+ break;
+ }
+
+ memset( rxBuffer, 0, ( size_t )RX_BUFFER_SIZE );
+
+ this->settings.State = RF_RX_RUNNING;
+ 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 ) + 10.0 ) /
+ ( 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:
+ {
+ if( this->settings.LoRa.FreqHopOn == true )
+ {
+ 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, DIO2=FhssChangeChannel
+ Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK & RFLR_DIOMAPPING1_DIO2_MASK ) | RFLR_DIOMAPPING1_DIO0_01 | RFLR_DIOMAPPING1_DIO2_00 );
+ }
+ else
+ {
+ 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 = RF_TX_RUNNING;
+ txTimeoutTimer.attach_us( this, &SX1276::OnTimeoutIrq, timeout );
+ SetOpMode( RF_OPMODE_TRANSMITTER );
+}
+
+void SX1276::StartCad( void )
+{
+ switch( this->settings.Modem )
+ {
+ case MODEM_FSK:
+ {
+
+ }
+ 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
+ );
+
+ // DIO3=CADDone
+ Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK ) | RFLR_DIOMAPPING1_DIO0_00 );
+
+ this->settings.State = RF_CAD;
+ SetOpMode( RFLR_OPMODE_CAD );
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+int16_t SX1276::GetRssi( RadioModems_t modem )
+{
+ int16_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( RadioModems_t 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::SetMaxPayloadLength( RadioModems_t modem, uint8_t max )
+{
+ this->SetModem( modem );
+
+ switch( modem )
+ {
+ case MODEM_FSK:
+ if( this->settings.Fsk.FixLen == false )
+ {
+ this->Write( REG_PAYLOADLENGTH, max );
+ }
+ break;
+ case MODEM_LORA:
+ this->Write( REG_LR_PAYLOADMAXLENGTH, max );
+ break;
+ }
+}
+
+void SX1276::OnTimeoutIrq( void )
+{
+ switch( this->settings.State )
+ {
+ case RF_RX_RUNNING:
+ 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 )
+ {
+ // Continuous mode restart Rx chain
+ Write( REG_RXCONFIG, Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK );
+ }
+ else
+ {
+ this->settings.State = RF_IDLE;
+ rxTimeoutSyncWord.detach( );
+ }
+ }
+ if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->RxTimeout != NULL ) )
+ {
+ this->RadioEvents->RxTimeout( );
+ }
+ break;
+ case RF_TX_RUNNING:
+ this->settings.State = RF_IDLE;
+ if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->TxTimeout != NULL ) )
+ {
+ this->RadioEvents->TxTimeout( );
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+void SX1276::OnDio0Irq( void )
+{
+ volatile uint8_t irqFlags = 0;
+
+ switch( this->settings.State )
+ {
+ case RF_RX_RUNNING:
+ //TimerStop( &RxTimeoutTimer );
+ // RxDone interrupt
+ switch( this->settings.Modem )
+ {
+ case MODEM_FSK:
+ if( this->settings.Fsk.CrcOn == true )
+ {
+ 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 = RF_IDLE;
+ rxTimeoutSyncWord.attach_us( this, &SX1276::OnTimeoutIrq, ( 8.0 * ( this->settings.Fsk.PreambleLen +
+ ( ( Read( REG_SYNCCONFIG ) &
+ ~RF_SYNCCONFIG_SYNCSIZE_MASK ) +
+ 1.0 ) + 10.0 ) /
+ ( double )this->settings.Fsk.Datarate ) * 1e6 ) ;
+ }
+ else
+ {
+ // Continuous mode restart Rx chain
+ Write( REG_RXCONFIG, Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK );
+ }
+ rxTimeoutTimer.detach( );
+
+ if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->RxError != NULL ) )
+ {
+ this->RadioEvents->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 = RF_IDLE;
+ rxTimeoutSyncWord.attach_us( this, &SX1276::OnTimeoutIrq, ( 8.0 * ( this->settings.Fsk.PreambleLen +
+ ( ( Read( REG_SYNCCONFIG ) &
+ ~RF_SYNCCONFIG_SYNCSIZE_MASK ) +
+ 1.0 ) + 10.0 ) /
+ ( double )this->settings.Fsk.Datarate ) * 1e6 ) ;
+ }
+ else
+ {
+ // Continuous mode restart Rx chain
+ Write( REG_RXCONFIG, Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK );
+ }
+ rxTimeoutTimer.detach( );
+
+ if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->RxDone != NULL ) )
+ {
+ this->RadioEvents->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:
+ {
+ int8_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 = RF_IDLE;
+ }
+ rxTimeoutTimer.detach( );
+
+ if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->RxError != NULL ) )
+ {
+ this->RadioEvents->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;
+ }
+
+ int16_t rssi = Read( REG_LR_PKTRSSIVALUE );
+ if( snr < 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 = RF_IDLE;
+ }
+ rxTimeoutTimer.detach( );
+
+ if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->RxDone != NULL ) )
+ {
+ this->RadioEvents->RxDone( rxBuffer, this->settings.LoRaPacketHandler.Size, this->settings.LoRaPacketHandler.RssiValue, this->settings.LoRaPacketHandler.SnrValue );
+ }
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ case RF_TX_RUNNING:
+ 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 = RF_IDLE;
+ if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->TxDone != NULL ) )
+ {
+ this->RadioEvents->TxDone( );
+ }
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+void SX1276::OnDio1Irq( void )
+{
+ switch( this->settings.State )
+ {
+ case RF_RX_RUNNING:
+ 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 = RF_IDLE;
+ if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->RxTimeout != NULL ) )
+ {
+ this->RadioEvents->RxTimeout( );
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ case RF_TX_RUNNING:
+ 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 RF_RX_RUNNING:
+ 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:
+ if( this->settings.LoRa.FreqHopOn == true )
+ {
+ // Clear Irq
+ Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL );
+
+ if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->FhssChangeChannel != NULL ) )
+ {
+ this->RadioEvents->FhssChangeChannel( ( Read( REG_LR_HOPCHANNEL ) & RFLR_HOPCHANNEL_CHANNEL_MASK ) );
+ }
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ case RF_TX_RUNNING:
+ switch( this->settings.Modem )
+ {
+ case MODEM_FSK:
+ break;
+ case MODEM_LORA:
+ if( this->settings.LoRa.FreqHopOn == true )
+ {
+ // Clear Irq
+ Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL );
+
+ if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->FhssChangeChannel != NULL ) )
+ {
+ this->RadioEvents->FhssChangeChannel( ( Read( REG_LR_HOPCHANNEL ) & RFLR_HOPCHANNEL_CHANNEL_MASK ) );
+ }
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+void SX1276::OnDio3Irq( void )
+{
+ switch( this->settings.Modem )
+ {
+ case MODEM_FSK:
+ break;
+ case MODEM_LORA:
+ if( ( Read( REG_LR_IRQFLAGS ) & RFLR_IRQFLAGS_CADDETECTED ) == RFLR_IRQFLAGS_CADDETECTED )
+ {
+ // Clear Irq
+ Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_CADDETECTED | RFLR_IRQFLAGS_CADDONE );
+ if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->CadDone != NULL ) )
+ {
+ this->RadioEvents->CadDone( true );
+ }
+ }
+ else
+ {
+ // Clear Irq
+ Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_CADDONE );
+ if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->CadDone != NULL ) )
+ {
+ this->RadioEvents->CadDone( false );
+ }
+ }
+ 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;
+ }
+}