/* / _____) _ | | ( (____ _____ ____ _| |_ _____ ____| |__ \____ \| ___ | (_ _) ___ |/ ___) _ \ _____) ) ____| | | || |_| ____( (___| | | | (______/|_____)_|_|_| \__)_____)\____)_| |_| (C)2013 Semtech Description: Generic SX1276 driver implementation License: Revised BSD License, see LICENSE.TXT file include in the project Maintainer: Miguel Luis, Gregory Cristian and Wael Guibene */ #include #include #include #include "radio.h" #include "sx1276.h" #include "sx1276-board.h" /* * Local types definition */ /*! * Radio registers definition */ typedef struct { RadioModems_t Modem; uint8_t Addr; uint8_t Value; }RadioRegisters_t; /*! * FSK bandwidth definition */ typedef struct { uint32_t bandwidth; uint8_t RegValue; }FskBandwidth_t; /* * Private functions prototypes */ /*! * 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 */ static void RxChainCalibration( void ); /*! * \brief Resets the SX1276 */ void SX1276Reset( void ); /*! * \brief Sets the SX1276 in transmission mode for the given time * \param [IN] timeout Transmission timeout [ms] [0: continuous, others timeout] */ void SX1276SetTx( uint32_t timeout ); /*! * \brief Writes the buffer contents to the SX1276 FIFO * * \param [IN] buffer Buffer containing data to be put on the FIFO. * \param [IN] size Number of bytes to be written to the FIFO */ void SX1276WriteFifo( uint8_t *buffer, uint8_t size ); /*! * \brief Reads the contents of the SX1276 FIFO * * \param [OUT] buffer Buffer where to copy the FIFO read data. * \param [IN] size Number of bytes to be read from the FIFO */ void SX1276ReadFifo( uint8_t *buffer, uint8_t size ); /*! * \brief Sets the SX1276 operating mode * * \param [IN] opMode New operating mode */ void SX1276SetOpMode( uint8_t opMode ); /* * SX1276 DIO IRQ callback functions prototype */ /*! * \brief DIO 0 IRQ callback */ void SX1276OnDio0Irq( void ); /*! * \brief DIO 1 IRQ callback */ void SX1276OnDio1Irq( void ); /*! * \brief DIO 2 IRQ callback */ void SX1276OnDio2Irq( void ); /*! * \brief DIO 3 IRQ callback */ void SX1276OnDio3Irq( void ); /*! * \brief DIO 4 IRQ callback */ void SX1276OnDio4Irq( void ); /*! * \brief DIO 5 IRQ callback */ void SX1276OnDio5Irq( void ); /*! * \brief Tx & Rx timeout timer callback */ void SX1276OnTimeoutIrq( void ); /* * Private global constants */ /*! * Radio hardware registers initialization * * \remark RADIO_INIT_REGISTERS_VALUE is defined in sx1276-board.h file */ const RadioRegisters_t RadioRegsInit[] = RADIO_INIT_REGISTERS_VALUE; /*! * Constant values need to compute the RSSI value */ #define RSSI_OFFSET_LF -164 #define RSSI_OFFSET_HF -157 /*! * Precomputed FSK bandwidth registers values */ const FskBandwidth_t 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 }; /* * Private global variables */ /*! * Radio callbacks variable */ static RadioEvents_t *RadioEvents; /*! * Reception buffer */ static uint8_t RxTxBuffer[RX_BUFFER_SIZE]; /* * Public global variables */ /*! * Radio hardware and global parameters */ SX1276_t SX1276; /*! * Hardware DIO IRQ callback initialization */ DioIrqHandler *DioIrq[] = { SX1276OnDio0Irq, SX1276OnDio1Irq, SX1276OnDio2Irq, SX1276OnDio3Irq, SX1276OnDio4Irq, NULL }; /*! * Flag used to set the RF switch control pins in low power mode when the radio is not active. */ static bool RadioIsActive = false; void SX1276SetAntSwLowPower( bool status ) { if( RadioIsActive != status ) { RadioIsActive = status; if( status == false ) { SX1276AntSwInit( ); } else { SX1276AntSwDeInit( ); } } } /* * Radio driver functions implementation */ void SX1276Init( RadioEvents_t *events ) { uint8_t i; RadioEvents = events; // Initialize driver timeout timers SX1276TimerInit(); SX1276IoInit(); SX1276Reset( ); RxChainCalibration( ); SX1276SetOpMode( RF_OPMODE_SLEEP ); SX1276IoIrqInit( DioIrq ); for( i = 0; i < sizeof( RadioRegsInit ) / sizeof( RadioRegisters_t ); i++ ) { SX1276SetModem( RadioRegsInit[i].Modem ); SX1276Write( RadioRegsInit[i].Addr, RadioRegsInit[i].Value ); } SX1276SetModem( MODEM_FSK ); SX1276.Settings.State = RF_IDLE; } RadioState_t SX1276GetStatus( void ) { return SX1276.Settings.State; } void SX1276SetChannel( uint32_t freq ) { SX1276.Settings.Channel = freq; freq = ( uint32_t )( ( double )freq / ( double )FREQ_STEP ); SX1276Write( REG_FRFMSB, ( uint8_t )( ( freq >> 16 ) & 0xFF ) ); SX1276Write( REG_FRFMID, ( uint8_t )( ( freq >> 8 ) & 0xFF ) ); SX1276Write( REG_FRFLSB, ( uint8_t )( freq & 0xFF ) ); } bool SX1276IsChannelFree( RadioModems_t modem, uint32_t freq, int16_t rssiThresh ) { int16_t rssi = 0; SX1276SetModem( modem ); SX1276SetChannel( freq ); SX1276SetOpMode( RF_OPMODE_RECEIVER ); SX1276DelayMs( 1 ); rssi = SX1276ReadRssi( modem ); SX1276SetSleep( ); if( rssi > rssiThresh ) { return false; } return true; } uint32_t SX1276Random( void ) { uint8_t i; uint32_t rnd = 0; /* * Radio setup for random number generation */ // Set LoRa modem ON SX1276SetModem( MODEM_LORA ); // Disable LoRa modem interrupts SX1276Write( 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 SX1276SetOpMode( RF_OPMODE_RECEIVER ); for( i = 0; i < 32; i++ ) { SX1276DelayMs( 1 ); // Unfiltered RSSI value reading. Only takes the LSB value rnd |= ( ( uint32_t )SX1276Read( REG_LR_RSSIWIDEBAND ) & 0x01 ) << i; } SX1276SetSleep( ); 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 */ static void RxChainCalibration( void ) { uint8_t regPaConfigInitVal; uint32_t initialFreq; // Save context regPaConfigInitVal = SX1276Read( REG_PACONFIG ); initialFreq = ( double )( ( ( uint32_t )SX1276Read( REG_FRFMSB ) << 16 ) | ( ( uint32_t )SX1276Read( REG_FRFMID ) << 8 ) | ( ( uint32_t )SX1276Read( REG_FRFLSB ) ) ) * ( double )FREQ_STEP; // Cut the PA just in case, RFO output, power = -1 dBm SX1276Write( REG_PACONFIG, 0x00 ); // Launch Rx chain calibration for LF band SX1276Write( REG_IMAGECAL, ( SX1276Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_MASK ) | RF_IMAGECAL_IMAGECAL_START ); while( ( SX1276Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_RUNNING ) == RF_IMAGECAL_IMAGECAL_RUNNING ) { } // Sets a Frequency in HF band SX1276SetChannel( 868000000 ); // Launch Rx chain calibration for HF band SX1276Write( REG_IMAGECAL, ( SX1276Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_MASK ) | RF_IMAGECAL_IMAGECAL_START ); while( ( SX1276Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_RUNNING ) == RF_IMAGECAL_IMAGECAL_RUNNING ) { } // Restore context SX1276Write( REG_PACONFIG, regPaConfigInitVal ); SX1276SetChannel( initialFreq ); } /*! * Returns the known FSK bandwidth registers value * * \param [IN] bandwidth Bandwidth value in Hz * \retval regValue Bandwidth register value. */ static uint8_t 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 SX1276SetRxConfig( 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 ) { SX1276SetModem( modem ); switch( modem ) { case MODEM_FSK: { SX1276.Settings.Fsk.Bandwidth = bandwidth; SX1276.Settings.Fsk.Datarate = datarate; SX1276.Settings.Fsk.BandwidthAfc = bandwidthAfc; SX1276.Settings.Fsk.FixLen = fixLen; SX1276.Settings.Fsk.PayloadLen = payloadLen; SX1276.Settings.Fsk.CrcOn = crcOn; SX1276.Settings.Fsk.IqInverted = iqInverted; SX1276.Settings.Fsk.RxContinuous = rxContinuous; SX1276.Settings.Fsk.PreambleLen = preambleLen; datarate = ( uint16_t )( ( double )XTAL_FREQ / ( double )datarate ); SX1276Write( REG_BITRATEMSB, ( uint8_t )( datarate >> 8 ) ); SX1276Write( REG_BITRATELSB, ( uint8_t )( datarate & 0xFF ) ); SX1276Write( REG_RXBW, GetFskBandwidthRegValue( bandwidth ) ); SX1276Write( REG_AFCBW, GetFskBandwidthRegValue( bandwidthAfc ) ); SX1276Write( REG_PREAMBLEMSB, ( uint8_t )( ( preambleLen >> 8 ) & 0xFF ) ); SX1276Write( REG_PREAMBLELSB, ( uint8_t )( preambleLen & 0xFF ) ); if( fixLen == 1 ) { SX1276Write( REG_PAYLOADLENGTH, payloadLen ); } else { SX1276Write( REG_PAYLOADLENGTH, 0xFF ); // Set payload length to the maximum } SX1276Write( REG_PACKETCONFIG1, ( SX1276Read( 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; SX1276.Settings.LoRa.Bandwidth = bandwidth; SX1276.Settings.LoRa.Datarate = datarate; SX1276.Settings.LoRa.Coderate = coderate; SX1276.Settings.LoRa.PreambleLen = preambleLen; SX1276.Settings.LoRa.FixLen = fixLen; SX1276.Settings.LoRa.PayloadLen = payloadLen; SX1276.Settings.LoRa.CrcOn = crcOn; SX1276.Settings.LoRa.FreqHopOn = freqHopOn; SX1276.Settings.LoRa.HopPeriod = hopPeriod; SX1276.Settings.LoRa.IqInverted = iqInverted; SX1276.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 ) ) ) { SX1276.Settings.LoRa.LowDatarateOptimize = 0x01; } else { SX1276.Settings.LoRa.LowDatarateOptimize = 0x00; } SX1276Write( REG_LR_MODEMCONFIG1, ( SX1276Read( REG_LR_MODEMCONFIG1 ) & RFLR_MODEMCONFIG1_BW_MASK & RFLR_MODEMCONFIG1_CODINGRATE_MASK & RFLR_MODEMCONFIG1_IMPLICITHEADER_MASK ) | ( bandwidth << 4 ) | ( coderate << 1 ) | fixLen ); SX1276Write( REG_LR_MODEMCONFIG2, ( SX1276Read( 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 ) ); SX1276Write( REG_LR_MODEMCONFIG3, ( SX1276Read( REG_LR_MODEMCONFIG3 ) & RFLR_MODEMCONFIG3_LOWDATARATEOPTIMIZE_MASK ) | ( SX1276.Settings.LoRa.LowDatarateOptimize << 3 ) ); SX1276Write( REG_LR_SYMBTIMEOUTLSB, ( uint8_t )( symbTimeout & 0xFF ) ); SX1276Write( REG_LR_PREAMBLEMSB, ( uint8_t )( ( preambleLen >> 8 ) & 0xFF ) ); SX1276Write( REG_LR_PREAMBLELSB, ( uint8_t )( preambleLen & 0xFF ) ); if( fixLen == 1 ) { SX1276Write( REG_LR_PAYLOADLENGTH, payloadLen ); } if( SX1276.Settings.LoRa.FreqHopOn == true ) { SX1276Write( REG_LR_PLLHOP, ( SX1276Read( REG_LR_PLLHOP ) & RFLR_PLLHOP_FASTHOP_MASK ) | RFLR_PLLHOP_FASTHOP_ON ); SX1276Write( REG_LR_HOPPERIOD, SX1276.Settings.LoRa.HopPeriod ); } if( ( bandwidth == 9 ) && ( SX1276.Settings.Channel > RF_MID_BAND_THRESH ) ) { // ERRATA 2.1 - Sensitivity Optimization with a 500 kHz Bandwidth SX1276Write( REG_LR_TEST36, 0x02 ); SX1276Write( REG_LR_TEST3A, 0x64 ); } else if( bandwidth == 9 ) { // ERRATA 2.1 - Sensitivity Optimization with a 500 kHz Bandwidth SX1276Write( REG_LR_TEST36, 0x02 ); SX1276Write( REG_LR_TEST3A, 0x7F ); } else { // ERRATA 2.1 - Sensitivity Optimization with a 500 kHz Bandwidth SX1276Write( REG_LR_TEST36, 0x03 ); } if( datarate == 6 ) { SX1276Write( REG_LR_DETECTOPTIMIZE, ( SX1276Read( REG_LR_DETECTOPTIMIZE ) & RFLR_DETECTIONOPTIMIZE_MASK ) | RFLR_DETECTIONOPTIMIZE_SF6 ); SX1276Write( REG_LR_DETECTIONTHRESHOLD, RFLR_DETECTIONTHRESH_SF6 ); } else { SX1276Write( REG_LR_DETECTOPTIMIZE, ( SX1276Read( REG_LR_DETECTOPTIMIZE ) & RFLR_DETECTIONOPTIMIZE_MASK ) | RFLR_DETECTIONOPTIMIZE_SF7_TO_SF12 ); SX1276Write( REG_LR_DETECTIONTHRESHOLD, RFLR_DETECTIONTHRESH_SF7_TO_SF12 ); } } break; } } void SX1276SetTxConfig( 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; SX1276SetModem( modem ); paConfig = SX1276Read( REG_PACONFIG ); paDac = SX1276Read( REG_PADAC ); //paConfig = ( paConfig & RF_PACONFIG_PASELECT_MASK ) | SX1276GetPaSelect( SX1276.Settings.Channel ); //paConfig = ( paConfig & RF_PACONFIG_MAX_POWER_MASK ) | 0x70; paConfig =0x80; //默认使用PABOOST引脚 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 ); } SX1276Write( REG_PACONFIG, paConfig ); SX1276Write( REG_PADAC, paDac ); switch( modem ) { case MODEM_FSK: { SX1276.Settings.Fsk.Power = power; SX1276.Settings.Fsk.Fdev = fdev; SX1276.Settings.Fsk.Bandwidth = bandwidth; SX1276.Settings.Fsk.Datarate = datarate; SX1276.Settings.Fsk.PreambleLen = preambleLen; SX1276.Settings.Fsk.FixLen = fixLen; SX1276.Settings.Fsk.CrcOn = crcOn; SX1276.Settings.Fsk.IqInverted = iqInverted; SX1276.Settings.Fsk.TxTimeout = timeout; fdev = ( uint16_t )( ( double )fdev / ( double )FREQ_STEP ); SX1276Write( REG_FDEVMSB, ( uint8_t )( fdev >> 8 ) ); SX1276Write( REG_FDEVLSB, ( uint8_t )( fdev & 0xFF ) ); datarate = ( uint16_t )( ( double )XTAL_FREQ / ( double )datarate ); SX1276Write( REG_BITRATEMSB, ( uint8_t )( datarate >> 8 ) ); SX1276Write( REG_BITRATELSB, ( uint8_t )( datarate & 0xFF ) ); SX1276Write( REG_PREAMBLEMSB, ( preambleLen >> 8 ) & 0x00FF ); SX1276Write( REG_PREAMBLELSB, preambleLen & 0xFF ); SX1276Write( REG_PACKETCONFIG1, ( SX1276Read( 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: { SX1276.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; SX1276.Settings.LoRa.Bandwidth = bandwidth; SX1276.Settings.LoRa.Datarate = datarate; SX1276.Settings.LoRa.Coderate = coderate; SX1276.Settings.LoRa.PreambleLen = preambleLen; SX1276.Settings.LoRa.FixLen = fixLen; SX1276.Settings.LoRa.FreqHopOn = freqHopOn; SX1276.Settings.LoRa.HopPeriod = hopPeriod; SX1276.Settings.LoRa.CrcOn = crcOn; SX1276.Settings.LoRa.IqInverted = iqInverted; SX1276.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 ) ) ) { SX1276.Settings.LoRa.LowDatarateOptimize = 0x01; } else { SX1276.Settings.LoRa.LowDatarateOptimize = 0x00; } if( SX1276.Settings.LoRa.FreqHopOn == true ) { SX1276Write( REG_LR_PLLHOP, ( SX1276Read( REG_LR_PLLHOP ) & RFLR_PLLHOP_FASTHOP_MASK ) | RFLR_PLLHOP_FASTHOP_ON ); SX1276Write( REG_LR_HOPPERIOD, SX1276.Settings.LoRa.HopPeriod ); } SX1276Write( REG_LR_MODEMCONFIG1, ( SX1276Read( REG_LR_MODEMCONFIG1 ) & RFLR_MODEMCONFIG1_BW_MASK & RFLR_MODEMCONFIG1_CODINGRATE_MASK & RFLR_MODEMCONFIG1_IMPLICITHEADER_MASK ) | ( bandwidth << 4 ) | ( coderate << 1 ) | fixLen ); SX1276Write( REG_LR_MODEMCONFIG2, ( SX1276Read( REG_LR_MODEMCONFIG2 ) & RFLR_MODEMCONFIG2_SF_MASK & RFLR_MODEMCONFIG2_RXPAYLOADCRC_MASK ) | ( datarate << 4 ) | ( crcOn << 2 ) ); SX1276Write( REG_LR_MODEMCONFIG3, ( SX1276Read( REG_LR_MODEMCONFIG3 ) & RFLR_MODEMCONFIG3_LOWDATARATEOPTIMIZE_MASK ) | ( SX1276.Settings.LoRa.LowDatarateOptimize << 3 ) ); SX1276Write( REG_LR_PREAMBLEMSB, ( preambleLen >> 8 ) & 0x00FF ); SX1276Write( REG_LR_PREAMBLELSB, preambleLen & 0xFF ); if( datarate == 6 ) { SX1276Write( REG_LR_DETECTOPTIMIZE, ( SX1276Read( REG_LR_DETECTOPTIMIZE ) & RFLR_DETECTIONOPTIMIZE_MASK ) | RFLR_DETECTIONOPTIMIZE_SF6 ); SX1276Write( REG_LR_DETECTIONTHRESHOLD, RFLR_DETECTIONTHRESH_SF6 ); } else { SX1276Write( REG_LR_DETECTOPTIMIZE, ( SX1276Read( REG_LR_DETECTOPTIMIZE ) & RFLR_DETECTIONOPTIMIZE_MASK ) | RFLR_DETECTIONOPTIMIZE_SF7_TO_SF12 ); SX1276Write( REG_LR_DETECTIONTHRESHOLD, RFLR_DETECTIONTHRESH_SF7_TO_SF12 ); } } break; } } uint32_t SX1276GetTimeOnAir( RadioModems_t modem, uint8_t pktLen ) { uint32_t airTime = 0; double rs = 0; double ts = 0; double tPreamble = 0; double tmp = 0; double nPayload = 0; double tPayload = 0; double tOnAir = 0; switch( modem ) { case MODEM_FSK: { airTime = round( ( 8 * ( SX1276.Settings.Fsk.PreambleLen + ( ( SX1276Read( REG_SYNCCONFIG ) & ~RF_SYNCCONFIG_SYNCSIZE_MASK ) + 1 ) + ( ( SX1276.Settings.Fsk.FixLen == 0x01 ) ? 0.0 : 1.0 ) + ( ( ( SX1276Read( REG_PACKETCONFIG1 ) & ~RF_PACKETCONFIG1_ADDRSFILTERING_MASK ) != 0x00 ) ? 1.0 : 0 ) + pktLen + ( ( SX1276.Settings.Fsk.CrcOn == 0x01 ) ? 2.0 : 0 ) ) / SX1276.Settings.Fsk.Datarate ) * 1e3 ); } break; case MODEM_LORA: { double bw = 0.0; // REMARK: When using LoRa modem only bandwidths 125, 250 and 500 kHz are supported switch( SX1276.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) rs = bw / ( 1 << SX1276.Settings.LoRa.Datarate ); ts = 1 / rs; // time of preamble tPreamble = ( SX1276.Settings.LoRa.PreambleLen + 4.25 ) * ts; // Symbol length of payload and time tmp = ceil( ( 8 * pktLen - 4 * SX1276.Settings.LoRa.Datarate + 28 + 16 * SX1276.Settings.LoRa.CrcOn - ( SX1276.Settings.LoRa.FixLen ? 20 : 0 ) ) / ( double )( 4 * SX1276.Settings.LoRa.Datarate - ( ( SX1276.Settings.LoRa.LowDatarateOptimize > 0 ) ? 2 : 0 ) ) ) * ( SX1276.Settings.LoRa.Coderate + 4 ); nPayload = 8 + ( ( tmp > 0 ) ? tmp : 0 ); tPayload = nPayload * ts; // Time on air tOnAir = tPreamble + tPayload; // return us secs airTime = floor( tOnAir * 1e3 + 0.999 ); } break; } return airTime; } void SX1276Send( uint8_t *buffer, uint8_t size ) { uint32_t txTimeout = 0; switch( SX1276.Settings.Modem ) { case MODEM_FSK: { SX1276.Settings.FskPacketHandler.NbBytes = 0; SX1276.Settings.FskPacketHandler.Size = size; if( SX1276.Settings.Fsk.FixLen == false ) { SX1276WriteFifo( ( uint8_t* )&size, 1 ); } else { SX1276Write( REG_PAYLOADLENGTH, size ); } if( ( size > 0 ) && ( size <= 64 ) ) { SX1276.Settings.FskPacketHandler.ChunkSize = size; } else { memcpy( RxTxBuffer, buffer, size ); SX1276.Settings.FskPacketHandler.ChunkSize = 32; } // Write payload buffer SX1276WriteFifo( buffer, SX1276.Settings.FskPacketHandler.ChunkSize ); SX1276.Settings.FskPacketHandler.NbBytes += SX1276.Settings.FskPacketHandler.ChunkSize; txTimeout = SX1276.Settings.Fsk.TxTimeout; } break; case MODEM_LORA: { if( SX1276.Settings.LoRa.IqInverted == true ) { SX1276Write( REG_LR_INVERTIQ, ( ( SX1276Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_OFF | RFLR_INVERTIQ_TX_ON ) ); SX1276Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_ON ); } else { SX1276Write( REG_LR_INVERTIQ, ( ( SX1276Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_OFF | RFLR_INVERTIQ_TX_OFF ) ); SX1276Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_OFF ); } SX1276.Settings.LoRaPacketHandler.Size = size; // Initializes the payload size SX1276Write( REG_LR_PAYLOADLENGTH, size ); // Full buffer used for Tx SX1276Write( REG_LR_FIFOTXBASEADDR, 0 ); SX1276Write( REG_LR_FIFOADDRPTR, 0 ); // FIFO operations can not take place in Sleep mode if( ( SX1276Read( REG_OPMODE ) & ~RF_OPMODE_MASK ) == RF_OPMODE_SLEEP ) { SX1276SetStby( ); SX1276DelayMs( 1 ); } // Write payload buffer SX1276WriteFifo( buffer, size ); txTimeout = SX1276.Settings.LoRa.TxTimeout; } break; } SX1276SetTx( txTimeout ); } void SX1276SetSleep( void ) { SX1276RxTimeoutTimerStop(); SX1276TxTimeoutTimerStop(); SX1276SetOpMode( RF_OPMODE_SLEEP ); SX1276.Settings.State = RF_IDLE; } void SX1276SetStby( void ) { SX1276RxTimeoutTimerStop(); SX1276TxTimeoutTimerStop(); SX1276SetOpMode( RF_OPMODE_STANDBY ); SX1276.Settings.State = RF_IDLE; } void SX1276SetRx( uint32_t timeout ) { bool rxContinuous = false; switch( SX1276.Settings.Modem ) { case MODEM_FSK: { rxContinuous = SX1276.Settings.Fsk.RxContinuous; // DIO0=PayloadReady // DIO1=FifoLevel // DIO2=SyncAddr // DIO3=FifoEmpty // DIO4=Preamble // DIO5=ModeReady SX1276Write( REG_DIOMAPPING1, ( SX1276Read( REG_DIOMAPPING1 ) & RF_DIOMAPPING1_DIO0_MASK & RF_DIOMAPPING1_DIO1_MASK & RF_DIOMAPPING1_DIO2_MASK ) | RF_DIOMAPPING1_DIO0_00 | RF_DIOMAPPING1_DIO1_00 | RF_DIOMAPPING1_DIO2_11 ); SX1276Write( REG_DIOMAPPING2, ( SX1276Read( REG_DIOMAPPING2 ) & RF_DIOMAPPING2_DIO4_MASK & RF_DIOMAPPING2_MAP_MASK ) | RF_DIOMAPPING2_DIO4_11 | RF_DIOMAPPING2_MAP_PREAMBLEDETECT ); SX1276.Settings.FskPacketHandler.FifoThresh = SX1276Read( REG_FIFOTHRESH ) & 0x3F; SX1276Write( REG_RXCONFIG, RF_RXCONFIG_AFCAUTO_ON | RF_RXCONFIG_AGCAUTO_ON | RF_RXCONFIG_RXTRIGER_PREAMBLEDETECT ); SX1276.Settings.FskPacketHandler.PreambleDetected = false; SX1276.Settings.FskPacketHandler.SyncWordDetected = false; SX1276.Settings.FskPacketHandler.NbBytes = 0; SX1276.Settings.FskPacketHandler.Size = 0; } break; case MODEM_LORA: { if( SX1276.Settings.LoRa.IqInverted == true ) { SX1276Write( REG_LR_INVERTIQ, ( ( SX1276Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_ON | RFLR_INVERTIQ_TX_OFF ) ); SX1276Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_ON ); } else { SX1276Write( REG_LR_INVERTIQ, ( ( SX1276Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_OFF | RFLR_INVERTIQ_TX_OFF ) ); SX1276Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_OFF ); } // ERRATA 2.3 - Receiver Spurious Reception of a LoRa Signal if( SX1276.Settings.LoRa.Bandwidth < 9 ) { SX1276Write( REG_LR_DETECTOPTIMIZE, SX1276Read( REG_LR_DETECTOPTIMIZE ) & 0x7F ); SX1276Write( REG_LR_TEST30, 0x00 ); switch( SX1276.Settings.LoRa.Bandwidth ) { case 0: // 7.8 kHz SX1276Write( REG_LR_TEST2F, 0x48 ); SX1276SetChannel(SX1276.Settings.Channel + 7.81e3 ); break; case 1: // 10.4 kHz SX1276Write( REG_LR_TEST2F, 0x44 ); SX1276SetChannel(SX1276.Settings.Channel + 10.42e3 ); break; case 2: // 15.6 kHz SX1276Write( REG_LR_TEST2F, 0x44 ); SX1276SetChannel(SX1276.Settings.Channel + 15.62e3 ); break; case 3: // 20.8 kHz SX1276Write( REG_LR_TEST2F, 0x44 ); SX1276SetChannel(SX1276.Settings.Channel + 20.83e3 ); break; case 4: // 31.2 kHz SX1276Write( REG_LR_TEST2F, 0x44 ); SX1276SetChannel(SX1276.Settings.Channel + 31.25e3 ); break; case 5: // 41.4 kHz SX1276Write( REG_LR_TEST2F, 0x44 ); SX1276SetChannel(SX1276.Settings.Channel + 41.67e3 ); break; case 6: // 62.5 kHz SX1276Write( REG_LR_TEST2F, 0x40 ); break; case 7: // 125 kHz SX1276Write( REG_LR_TEST2F, 0x40 ); break; case 8: // 250 kHz SX1276Write( REG_LR_TEST2F, 0x40 ); break; } } else { SX1276Write( REG_LR_DETECTOPTIMIZE, SX1276Read( REG_LR_DETECTOPTIMIZE ) | 0x80 ); } rxContinuous = SX1276.Settings.LoRa.RxContinuous; if( SX1276.Settings.LoRa.FreqHopOn == true ) { SX1276Write( 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 SX1276Write( REG_DIOMAPPING1, ( SX1276Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK & RFLR_DIOMAPPING1_DIO2_MASK ) | RFLR_DIOMAPPING1_DIO0_00 | RFLR_DIOMAPPING1_DIO2_00 ); } else { SX1276Write( 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 SX1276Write( REG_DIOMAPPING1, ( SX1276Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK ) | RFLR_DIOMAPPING1_DIO0_00 ); } SX1276Write( REG_LR_FIFORXBASEADDR, 0 ); SX1276Write( REG_LR_FIFOADDRPTR, 0 ); } break; } memset( RxTxBuffer, 0, ( size_t )RX_BUFFER_SIZE ); SX1276.Settings.State = RF_RX_RUNNING; if( timeout != 0 ) { SX1276RxTimeoutTimerStart(timeout); } if( SX1276.Settings.Modem == MODEM_FSK ) { SX1276SetOpMode( RF_OPMODE_RECEIVER ); if( rxContinuous == false ) { SX1276SyncWordTimeoutTimerStart(ceil( ( 8.0 * ( SX1276.Settings.Fsk.PreambleLen + ( ( SX1276Read( REG_SYNCCONFIG ) & ~RF_SYNCCONFIG_SYNCSIZE_MASK ) + 1.0 ) + 10.0 ) / ( double )SX1276.Settings.Fsk.Datarate ) * 1e3 ) + 4 ); } } else { if( rxContinuous == true ) { SX1276SetOpMode( RFLR_OPMODE_RECEIVER ); } else { SX1276SetOpMode( RFLR_OPMODE_RECEIVER_SINGLE ); } } SX1276Read(REG_LR_IRQFLAGS);//设置接收后读写任意寄存器可以开始接收 } void SX1276SetTx( uint32_t timeout ) { switch( SX1276.Settings.Modem ) { case MODEM_FSK: { // DIO0=PacketSent // DIO1=FifoEmpty // DIO2=FifoFull // DIO3=FifoEmpty // DIO4=LowBat // DIO5=ModeReady SX1276Write( REG_DIOMAPPING1, ( SX1276Read( REG_DIOMAPPING1 ) & RF_DIOMAPPING1_DIO0_MASK & RF_DIOMAPPING1_DIO1_MASK & RF_DIOMAPPING1_DIO2_MASK ) | RF_DIOMAPPING1_DIO1_01 ); SX1276Write( REG_DIOMAPPING2, ( SX1276Read( REG_DIOMAPPING2 ) & RF_DIOMAPPING2_DIO4_MASK & RF_DIOMAPPING2_MAP_MASK ) ); SX1276.Settings.FskPacketHandler.FifoThresh = SX1276Read( REG_FIFOTHRESH ) & 0x3F; } break; case MODEM_LORA: { if( SX1276.Settings.LoRa.FreqHopOn == true ) { SX1276Write( 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 SX1276Write( REG_DIOMAPPING1, ( SX1276Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK & RFLR_DIOMAPPING1_DIO2_MASK ) | RFLR_DIOMAPPING1_DIO0_01 | RFLR_DIOMAPPING1_DIO2_00 ); } else { SX1276Write( 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 SX1276Write( REG_DIOMAPPING1, ( SX1276Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK ) | RFLR_DIOMAPPING1_DIO0_01 ); } } break; } SX1276.Settings.State = RF_TX_RUNNING; SX1276RxTimeoutTimerStart(timeout); SX1276SetOpMode( RF_OPMODE_TRANSMITTER ); SX1276Read(REG_LR_IRQFLAGS);//设置发送后读写任意寄存器可以开始发送 } void SX1276StartCad( void ) { switch( SX1276.Settings.Modem ) { case MODEM_FSK: { } break; case MODEM_LORA: { SX1276Write( 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 SX1276Write( REG_DIOMAPPING1, ( SX1276Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK ) | RFLR_DIOMAPPING1_DIO0_00 ); SX1276.Settings.State = RF_CAD; SX1276SetOpMode( RFLR_OPMODE_CAD ); } break; default: break; } } int16_t SX1276ReadRssi( RadioModems_t modem ) { int16_t rssi = 0; switch( modem ) { case MODEM_FSK: rssi = -( SX1276Read( REG_RSSIVALUE ) >> 1 ); break; case MODEM_LORA: if( SX1276.Settings.Channel > RF_MID_BAND_THRESH ) { rssi = RSSI_OFFSET_HF + SX1276Read( REG_LR_RSSIVALUE ); } else { rssi = RSSI_OFFSET_LF + SX1276Read( REG_LR_RSSIVALUE ); } break; default: rssi = -1; break; } return rssi; } void SX1276SetOpMode( uint8_t opMode ) { if( opMode == RF_OPMODE_SLEEP ) { SX1276SetAntSwLowPower( true ); } else { SX1276SetAntSwLowPower( false ); if( opMode == RF_OPMODE_TRANSMITTER ) { SX1276SetAntSw( 1 ); } else { SX1276SetAntSw( 0 ); } } SX1276Write( REG_OPMODE, ( SX1276Read( REG_OPMODE ) & RF_OPMODE_MASK ) | opMode ); } void SX1276SetModem( RadioModems_t modem ) { if( SX1276.Settings.Modem == modem ) { return; } SX1276.Settings.Modem = modem; switch( SX1276.Settings.Modem ) { default: case MODEM_FSK: SX1276SetOpMode( RF_OPMODE_SLEEP ); SX1276Write( REG_OPMODE, ( SX1276Read( REG_OPMODE ) & RFLR_OPMODE_LONGRANGEMODE_MASK ) | RFLR_OPMODE_LONGRANGEMODE_OFF ); SX1276Write( REG_DIOMAPPING1, 0x00 ); SX1276Write( REG_DIOMAPPING2, 0x30 ); // DIO5=ModeReady break; case MODEM_LORA: SX1276SetOpMode( RF_OPMODE_SLEEP ); SX1276Write( REG_OPMODE, ( SX1276Read( REG_OPMODE ) & RFLR_OPMODE_LONGRANGEMODE_MASK ) | RFLR_OPMODE_LONGRANGEMODE_ON ); SX1276Write( REG_DIOMAPPING1, 0x00 ); SX1276Write( REG_DIOMAPPING2, 0x00 ); break; } } void SX1276Write( uint8_t addr, uint8_t data ) { SX1276WriteBuffer( addr, &data, 1 ); } uint8_t SX1276Read( uint8_t addr ) { uint8_t data; SX1276ReadBuffer( addr, &data, 1 ); return data; } void SX1276WriteBuffer( uint8_t addr, uint8_t *buffer, uint8_t size ) { uint8_t i; //NSS = 0; Sx1276SetNSS(0); Sx1276SpiInOut(addr | 0x80 ); for( i = 0; i < size; i++ ) { Sx1276SpiInOut(buffer[i] ); } //NSS = 1; Sx1276SetNSS(1); } void SX1276ReadBuffer( uint8_t addr, uint8_t *buffer, uint8_t size ) { uint8_t i; //NSS = 0; Sx1276SetNSS( 0 ); Sx1276SpiInOut(addr & 0x7F ); for( i = 0; i < size; i++ ) { buffer[i] = Sx1276SpiInOut( 0 ); } //NSS = 1; Sx1276SetNSS(1); } void SX1276WriteFifo( uint8_t *buffer, uint8_t size ) { SX1276WriteBuffer( 0, buffer, size ); } void SX1276ReadFifo( uint8_t *buffer, uint8_t size ) { SX1276ReadBuffer( 0, buffer, size ); } void SX1276SetMaxPayloadLength( RadioModems_t modem, uint8_t max ) { SX1276SetModem( modem ); switch( modem ) { case MODEM_FSK: if( SX1276.Settings.Fsk.FixLen == false ) { SX1276Write( REG_PAYLOADLENGTH, max ); } break; case MODEM_LORA: SX1276Write( REG_LR_PAYLOADMAXLENGTH, max ); break; } } /* 发射超时函数，判断此时发射机状态 处于lora状态还是fsk状态 */ void SX1276OnTimeoutIrq( void ) { switch( SX1276.Settings.State ) { case RF_RX_RUNNING: if( SX1276.Settings.Modem == MODEM_FSK ) { SX1276.Settings.FskPacketHandler.PreambleDetected = false; SX1276.Settings.FskPacketHandler.SyncWordDetected = false; SX1276.Settings.FskPacketHandler.NbBytes = 0; SX1276.Settings.FskPacketHandler.Size = 0; // Clear Irqs SX1276Write( REG_IRQFLAGS1, RF_IRQFLAGS1_RSSI | RF_IRQFLAGS1_PREAMBLEDETECT | RF_IRQFLAGS1_SYNCADDRESSMATCH ); SX1276Write( REG_IRQFLAGS2, RF_IRQFLAGS2_FIFOOVERRUN ); if( SX1276.Settings.Fsk.RxContinuous == true ) { // Continuous mode restart Rx chain SX1276Write( REG_RXCONFIG, SX1276Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK ); //TimerStart( &RxTimeoutSyncWord ); SX1276SyncWordTimeoutTimerStart(ceil( ( 8.0 * ( SX1276.Settings.Fsk.PreambleLen + ( ( SX1276Read( REG_SYNCCONFIG ) & ~RF_SYNCCONFIG_SYNCSIZE_MASK ) + 1.0 ) + 10.0 ) / ( double )SX1276.Settings.Fsk.Datarate ) * 1e3 ) + 4 ); } else { SX1276.Settings.State = RF_IDLE; SX1276SyncWordTimeoutTimerStop(); } } if( ( RadioEvents != NULL ) && ( RadioEvents->RxTimeout != NULL ) ) { RadioEvents->RxTimeout( ); } break; case RF_TX_RUNNING: SX1276.Settings.State = RF_IDLE; if( ( RadioEvents != NULL ) && ( RadioEvents->TxTimeout != NULL ) ) { RadioEvents->TxTimeout( ); } break; default: break; } } void SX1276OnDio0Irq( void ) { volatile uint8_t irqFlags = 0; int16_t rssi = 0; switch( SX1276.Settings.State ) { case RF_RX_RUNNING: SX1276RxTimeoutTimerStop(); // RxDone interrupt switch( SX1276.Settings.Modem ) { case MODEM_FSK: if( SX1276.Settings.Fsk.CrcOn == true ) { irqFlags = SX1276Read( REG_IRQFLAGS2 ); if( ( irqFlags & RF_IRQFLAGS2_CRCOK ) != RF_IRQFLAGS2_CRCOK ) { // Clear Irqs SX1276Write( REG_IRQFLAGS1, RF_IRQFLAGS1_RSSI | RF_IRQFLAGS1_PREAMBLEDETECT | RF_IRQFLAGS1_SYNCADDRESSMATCH ); SX1276Write( REG_IRQFLAGS2, RF_IRQFLAGS2_FIFOOVERRUN ); SX1276RxTimeoutTimerStop(); if( SX1276.Settings.Fsk.RxContinuous == false ) { SX1276SyncWordTimeoutTimerStop(); SX1276.Settings.State = RF_IDLE; } else { // Continuous mode restart Rx chain SX1276Write( REG_RXCONFIG, SX1276Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK ); //TimerStart( &RxTimeoutSyncWord ); SX1276SyncWordTimeoutTimerStart(ceil( ( 8.0 * ( SX1276.Settings.Fsk.PreambleLen + ( ( SX1276Read( REG_SYNCCONFIG ) & ~RF_SYNCCONFIG_SYNCSIZE_MASK ) + 1.0 ) + 10.0 ) / ( double )SX1276.Settings.Fsk.Datarate ) * 1e3 ) + 4 ); } if( ( RadioEvents != NULL ) && ( RadioEvents->RxError != NULL ) ) { RadioEvents->RxError( ); } SX1276.Settings.FskPacketHandler.PreambleDetected = false; SX1276.Settings.FskPacketHandler.SyncWordDetected = false; SX1276.Settings.FskPacketHandler.NbBytes = 0; SX1276.Settings.FskPacketHandler.Size = 0; break; } } // Read received packet size if( ( SX1276.Settings.FskPacketHandler.Size == 0 ) && ( SX1276.Settings.FskPacketHandler.NbBytes == 0 ) ) { if( SX1276.Settings.Fsk.FixLen == false ) { SX1276ReadFifo( ( uint8_t* )&SX1276.Settings.FskPacketHandler.Size, 1 ); } else { SX1276.Settings.FskPacketHandler.Size = SX1276Read( REG_PAYLOADLENGTH ); } SX1276ReadFifo( RxTxBuffer + SX1276.Settings.FskPacketHandler.NbBytes, SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes ); SX1276.Settings.FskPacketHandler.NbBytes += ( SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes ); } else { SX1276ReadFifo( RxTxBuffer + SX1276.Settings.FskPacketHandler.NbBytes, SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes ); SX1276.Settings.FskPacketHandler.NbBytes += ( SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes ); } if( SX1276.Settings.Fsk.RxContinuous == false ) { SX1276.Settings.State = RF_IDLE; //TimerStart( &RxTimeoutSyncWord ); SX1276SyncWordTimeoutTimerStart(ceil( ( 8.0 * ( SX1276.Settings.Fsk.PreambleLen + ( ( SX1276Read( REG_SYNCCONFIG ) & ~RF_SYNCCONFIG_SYNCSIZE_MASK ) + 1.0 ) + 10.0 ) / ( double )SX1276.Settings.Fsk.Datarate ) * 1e3 ) + 4 ); } else { // Continuous mode restart Rx chain SX1276Write( REG_RXCONFIG, SX1276Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK ); } SX1276RxTimeoutTimerStop(); if( ( RadioEvents != NULL ) && ( RadioEvents->RxDone != NULL ) ) { RadioEvents->RxDone( RxTxBuffer, SX1276.Settings.FskPacketHandler.Size, SX1276.Settings.FskPacketHandler.RssiValue, 0 ); } SX1276.Settings.FskPacketHandler.PreambleDetected = false; SX1276.Settings.FskPacketHandler.SyncWordDetected = false; SX1276.Settings.FskPacketHandler.NbBytes = 0; SX1276.Settings.FskPacketHandler.Size = 0; break; case MODEM_LORA: { int8_t snr = 0; // Clear Irq SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_RXDONE ); irqFlags = SX1276Read( REG_LR_IRQFLAGS ); if( ( irqFlags & RFLR_IRQFLAGS_PAYLOADCRCERROR_MASK ) == RFLR_IRQFLAGS_PAYLOADCRCERROR ) { // Clear Irq SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_PAYLOADCRCERROR ); if( SX1276.Settings.LoRa.RxContinuous == false ) { SX1276.Settings.State = RF_IDLE; } SX1276RxTimeoutTimerStop(); if( ( RadioEvents != NULL ) && ( RadioEvents->RxError != NULL ) ) { RadioEvents->RxError( ); } break; } SX1276.Settings.LoRaPacketHandler.SnrValue = SX1276Read( REG_LR_PKTSNRVALUE ); if( SX1276.Settings.LoRaPacketHandler.SnrValue & 0x80 ) // The SNR sign bit is 1 { // Invert and divide by 4 snr = ( ( ~SX1276.Settings.LoRaPacketHandler.SnrValue + 1 ) & 0xFF ) >> 2; snr = -snr; } else { // Divide by 4 snr = ( SX1276.Settings.LoRaPacketHandler.SnrValue & 0xFF ) >> 2; } rssi = SX1276Read( REG_LR_PKTRSSIVALUE ); if( snr < 0 ) { if( SX1276.Settings.Channel > RF_MID_BAND_THRESH ) { SX1276.Settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_HF + rssi + ( rssi >> 4 ) + snr; } else { SX1276.Settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_LF + rssi + ( rssi >> 4 ) + snr; } } else { if( SX1276.Settings.Channel > RF_MID_BAND_THRESH ) { SX1276.Settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_HF + rssi + ( rssi >> 4 ); } else { SX1276.Settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_LF + rssi + ( rssi >> 4 ); } } SX1276.Settings.LoRaPacketHandler.Size = SX1276Read( REG_LR_RXNBBYTES ); SX1276ReadFifo( RxTxBuffer, SX1276.Settings.LoRaPacketHandler.Size ); if( SX1276.Settings.LoRa.RxContinuous == false ) { SX1276.Settings.State = RF_IDLE; } SX1276RxTimeoutTimerStop(); if( ( RadioEvents != NULL ) && ( RadioEvents->RxDone != NULL ) ) { RadioEvents->RxDone( RxTxBuffer, SX1276.Settings.LoRaPacketHandler.Size, SX1276.Settings.LoRaPacketHandler.RssiValue, SX1276.Settings.LoRaPacketHandler.SnrValue ); } } break; default: break; } break; case RF_TX_RUNNING: SX1276TxTimeoutTimerStop(); // TxDone interrupt switch( SX1276.Settings.Modem ) { case MODEM_LORA: // Clear Irq SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_TXDONE ); // Intentional fall through case MODEM_FSK: default: SX1276.Settings.State = RF_IDLE; if( ( RadioEvents != NULL ) && ( RadioEvents->TxDone != NULL ) ) { RadioEvents->TxDone( ); } break; } break; default: break; } } void SX1276OnDio1Irq( void ) { switch( SX1276.Settings.State ) { case RF_RX_RUNNING: switch( SX1276.Settings.Modem ) { case MODEM_FSK: // FifoLevel interrupt // Read received packet size if( ( SX1276.Settings.FskPacketHandler.Size == 0 ) && ( SX1276.Settings.FskPacketHandler.NbBytes == 0 ) ) { if( SX1276.Settings.Fsk.FixLen == false ) { SX1276ReadFifo( ( uint8_t* )&SX1276.Settings.FskPacketHandler.Size, 1 ); } else { SX1276.Settings.FskPacketHandler.Size = SX1276Read( REG_PAYLOADLENGTH ); } } if( ( SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes ) > SX1276.Settings.FskPacketHandler.FifoThresh ) { SX1276ReadFifo( ( RxTxBuffer + SX1276.Settings.FskPacketHandler.NbBytes ), SX1276.Settings.FskPacketHandler.FifoThresh ); SX1276.Settings.FskPacketHandler.NbBytes += SX1276.Settings.FskPacketHandler.FifoThresh; } else { SX1276ReadFifo( ( RxTxBuffer + SX1276.Settings.FskPacketHandler.NbBytes ), SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes ); SX1276.Settings.FskPacketHandler.NbBytes += ( SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes ); } break; case MODEM_LORA: // Sync time out SX1276RxTimeoutTimerStop(); // Clear Irq SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_RXTIMEOUT ); SX1276.Settings.State = RF_IDLE; if( ( RadioEvents != NULL ) && ( RadioEvents->RxTimeout != NULL ) ) { RadioEvents->RxTimeout( ); } break; default: break; } break; case RF_TX_RUNNING: switch( SX1276.Settings.Modem ) { case MODEM_FSK: // FifoEmpty interrupt if( ( SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes ) > SX1276.Settings.FskPacketHandler.ChunkSize ) { SX1276WriteFifo( ( RxTxBuffer + SX1276.Settings.FskPacketHandler.NbBytes ), SX1276.Settings.FskPacketHandler.ChunkSize ); SX1276.Settings.FskPacketHandler.NbBytes += SX1276.Settings.FskPacketHandler.ChunkSize; } else { // Write the last chunk of data SX1276WriteFifo( RxTxBuffer + SX1276.Settings.FskPacketHandler.NbBytes, SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes ); SX1276.Settings.FskPacketHandler.NbBytes += SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes; } break; case MODEM_LORA: // Sync time out SX1276TxTimeoutTimerStop(); // Clear Irq //SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_RXTIMEOUT ); SX1276.Settings.State = RF_IDLE; if( ( RadioEvents != NULL ) && ( RadioEvents->TxTimeout != NULL ) ) { RadioEvents->TxTimeout( ); } break; default: break; } break; default: break; } } void SX1276OnDio2Irq( void ) { switch( SX1276.Settings.State ) { case RF_RX_RUNNING: switch( SX1276.Settings.Modem ) { case MODEM_FSK: if( ( SX1276.Settings.FskPacketHandler.PreambleDetected == true ) && ( SX1276.Settings.FskPacketHandler.SyncWordDetected == false ) ) { SX1276SyncWordTimeoutTimerStop(); SX1276.Settings.FskPacketHandler.SyncWordDetected = true; SX1276.Settings.FskPacketHandler.RssiValue = -( SX1276Read( REG_RSSIVALUE ) >> 1 ); SX1276.Settings.FskPacketHandler.AfcValue = ( int32_t )( double )( ( ( uint16_t )SX1276Read( REG_AFCMSB ) << 8 ) | ( uint16_t )SX1276Read( REG_AFCLSB ) ) * ( double )FREQ_STEP; SX1276.Settings.FskPacketHandler.RxGain = ( SX1276Read( REG_LNA ) >> 5 ) & 0x07; } break; case MODEM_LORA: if( SX1276.Settings.LoRa.FreqHopOn == true ) { // Clear Irq SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL ); if( ( RadioEvents != NULL ) && ( RadioEvents->FhssChangeChannel != NULL ) ) { RadioEvents->FhssChangeChannel( ( SX1276Read( REG_LR_HOPCHANNEL ) & RFLR_HOPCHANNEL_CHANNEL_MASK ) ); } } break; default: break; } break; case RF_TX_RUNNING: switch( SX1276.Settings.Modem ) { case MODEM_FSK: break; case MODEM_LORA: if( SX1276.Settings.LoRa.FreqHopOn == true ) { // Clear Irq SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL ); if( ( RadioEvents != NULL ) && ( RadioEvents->FhssChangeChannel != NULL ) ) { RadioEvents->FhssChangeChannel( ( SX1276Read( REG_LR_HOPCHANNEL ) & RFLR_HOPCHANNEL_CHANNEL_MASK ) ); } } break; default: break; } break; default: break; } } void SX1276OnDio3Irq( void ) { switch( SX1276.Settings.Modem ) { case MODEM_FSK: break; case MODEM_LORA: if( ( SX1276Read( REG_LR_IRQFLAGS ) & RFLR_IRQFLAGS_CADDETECTED ) == RFLR_IRQFLAGS_CADDETECTED ) { // Clear Irq SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_CADDETECTED | RFLR_IRQFLAGS_CADDONE ); if( ( RadioEvents != NULL ) && ( RadioEvents->CadDone != NULL ) ) { RadioEvents->CadDone( true ); } } else { // Clear Irq SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_CADDONE ); if( ( RadioEvents != NULL ) && ( RadioEvents->CadDone != NULL ) ) { RadioEvents->CadDone( false ); } } break; default: break; } } void SX1276OnDio4Irq( void ) { switch( SX1276.Settings.Modem ) { case MODEM_FSK: { if( SX1276.Settings.FskPacketHandler.PreambleDetected == false ) { SX1276.Settings.FskPacketHandler.PreambleDetected = true; } } break; case MODEM_LORA: break; default: break; } } void SX1276OnDio5Irq( void ) { switch( SX1276.Settings.Modem ) { case MODEM_FSK: break; case MODEM_LORA: break; default: break; } } //一些和硬件相关写死的内容 //切换射频输出口 uint8_t SX1276GetPaSelect( uint32_t channel ) { //硬件上都连接到 PABOOST 上了，没有使用RFO，所以统一返回 RF_PACONFIG_PASELECT_PABOOST return RF_PACONFIG_PASELECT_PABOOST; /*if( channel < RF_MID_BAND_THRESH ) { return RF_PACONFIG_PASELECT_PABOOST; } else { return RF_PACONFIG_PASELECT_RFO; }*/ } void SX1276AntSwInit( void ) { /* 我们的RA-01/02模组的天线切换开关由硬件自动控制，不需要软件控制 GpioInit( &AntSwitchLf, RADIO_ANT_SWITCH_LF, PIN_OUTPUT, PIN_PUSH_PULL, PIN_PULL_UP, 1 ); GpioInit( &AntSwitchHf, RADIO_ANT_SWITCH_HF, PIN_OUTPUT, PIN_PUSH_PULL, PIN_PULL_UP, 0 );*/ } void SX1276AntSwDeInit( void ) { /* 我们的RA-01/02模组的天线切换开关由硬件自动控制，不需要软件控制 GpioInit( &AntSwitchLf, RADIO_ANT_SWITCH_LF, PIN_OUTPUT, PIN_OPEN_DRAIN, PIN_NO_PULL, 0 ); GpioInit( &AntSwitchHf, RADIO_ANT_SWITCH_HF, PIN_OUTPUT, PIN_OPEN_DRAIN, PIN_NO_PULL, 0 );*/ } void SX1276SetAntSw( uint8_t rxTx ) { /* 我们的RA-01/02模组的天线切换开关由硬件自动控制，不需要软件控制 if( rxTx != 0 ) // 1: TX, 0: RX { GpioWrite( &AntSwitchLf, 0 ); GpioWrite( &AntSwitchHf, 1 ); } else { GpioWrite( &AntSwitchLf, 1 ); GpioWrite( &AntSwitchHf, 0 ); }*/ }