/* / _____) _ | | ( (____ _____ ____ _| |_ _____ ____| |__ \____ \| ___ | (_ _) ___ |/ ___) _ \ _____) ) ____| | | || |_| ____( (___| | | | (______/|_____)_|_|_| \__)_____)\____)_| |_| (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 */ #ifndef __SX1276_H__ #define __SX1276_H__ #include "radio.h" #include "./registers/sx1276Regs-Fsk.h" #include "./registers/sx1276Regs-LoRa.h" #include "./typedefs/typedefs.h" /*! * Radio wake-up time from sleep */ #define RADIO_WAKEUP_TIME 1 // [ms] /*! * Sync word for Private LoRa networks */ #define LORA_MAC_PRIVATE_SYNCWORD 0x12 /*! * Sync word for Public LoRa networks */ #define LORA_MAC_PUBLIC_SYNCWORD 0x34 /*! * SX1276 definitions */ #define XTAL_FREQ 32000000 #define FREQ_STEP 61.03515625 #define RX_BUFFER_SIZE 256 /*! * Constant values need to compute the RSSI value */ #define RSSI_OFFSET_LF -164.0 #define RSSI_OFFSET_HF -157.0 #define RF_MID_BAND_THRESH 525000000 /*! * Actual implementation of a SX1276 radio, inherits Radio */ class SX1276 : public Radio { protected: /*! * SPI Interface */ SPI spi; // mosi, miso, sclk DigitalOut nss; /*! * SX1276 Reset pin */ DigitalInOut reset; /*! * SX1276 DIO pins */ InterruptIn dio0; InterruptIn dio1; InterruptIn dio2; InterruptIn dio3; InterruptIn dio4; DigitalIn dio5; bool isRadioActive; uint8_t boardConnected; //1 = SX1276MB1LAS; 0 = SX1276MB1MAS uint8_t *rxtxBuffer; /*! * Hardware DIO IRQ functions */ DioIrqHandler *dioIrq; /*! * Tx and Rx timers */ Timeout txTimeoutTimer; Timeout rxTimeoutTimer; Timeout rxTimeoutSyncWord; RadioSettings_t settings; static const FskBandwidth_t FskBandwidths[]; protected: /*! * 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 RxChainCalibration( void ); public: 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 ); SX1276( RadioEvents_t *events ); virtual ~SX1276( ); //------------------------------------------------------------------------- // Redefined Radio functions //------------------------------------------------------------------------- /*! * @brief Initializes the radio * * @param [IN] events Structure containing the driver callback functions */ virtual void Init( RadioEvents_t *events ); /*! * Return current radio status * * @param status Radio status. [RF_IDLE, RX_RUNNING, TX_RUNNING] */ virtual RadioState GetStatus( void ); /*! * @brief Configures the SX1276 with the given modem * * @param [IN] modem Modem to be used [0: FSK, 1: LoRa] */ virtual void SetModem( RadioModems_t modem ); /*! * @brief Sets the channel frequency * * @param [IN] freq Channel RF frequency */ virtual void SetChannel( uint32_t freq ); /*! * @brief Sets the channels configuration * * @param [IN] modem Radio modem to be used [0: FSK, 1: LoRa] * @param [IN] freq Channel RF frequency * @param [IN] rssiThresh RSSI threshold * * @retval isFree [true: Channel is free, false: Channel is not free] */ virtual bool IsChannelFree( RadioModems_t modem, uint32_t freq, int16_t rssiThresh ); /*! * @brief Generates a 32 bits random value based on the RSSI readings * * \remark This function sets the radio in LoRa modem mode and disables * all interrupts. * After calling this function either Radio.SetRxConfig or * Radio.SetTxConfig functions must be called. * * @retval randomValue 32 bits random value */ virtual uint32_t Random( void ); /*! * @brief Sets the reception parameters * * @param [IN] modem Radio modem to be used [0: FSK, 1: LoRa] * @param [IN] bandwidth Sets the bandwidth * FSK : >= 2600 and <= 250000 Hz * LoRa: [0: 125 kHz, 1: 250 kHz, * 2: 500 kHz, 3: Reserved] * @param [IN] datarate Sets the Datarate * FSK : 600..300000 bits/s * LoRa: [6: 64, 7: 128, 8: 256, 9: 512, * 10: 1024, 11: 2048, 12: 4096 chips] * @param [IN] coderate Sets the coding rate ( LoRa only ) * FSK : N/A ( set to 0 ) * LoRa: [1: 4/5, 2: 4/6, 3: 4/7, 4: 4/8] * @param [IN] bandwidthAfc Sets the AFC Bandwidth ( FSK only ) * FSK : >= 2600 and <= 250000 Hz * LoRa: N/A ( set to 0 ) * @param [IN] preambleLen Sets the Preamble length ( LoRa only ) * FSK : N/A ( set to 0 ) * LoRa: Length in symbols ( the hardware adds 4 more symbols ) * @param [IN] symbTimeout Sets the RxSingle timeout value * FSK : timeout number of bytes * LoRa: timeout in symbols * @param [IN] fixLen Fixed length packets [0: variable, 1: fixed] * @param [IN] payloadLen Sets payload length when fixed lenght is used * @param [IN] crcOn Enables/Disables the CRC [0: OFF, 1: ON] * @param [IN] freqHopOn Enables disables the intra-packet frequency hopping [0: OFF, 1: ON] (LoRa only) * @param [IN] hopPeriod Number of symbols bewteen each hop (LoRa only) * @param [IN] iqInverted Inverts IQ signals ( LoRa only ) * FSK : N/A ( set to 0 ) * LoRa: [0: not inverted, 1: inverted] * @param [IN] rxContinuous Sets the reception in continuous mode * [false: single mode, true: continuous mode] */ virtual void 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 ); /*! * @brief Sets the transmission parameters * * @param [IN] modem Radio modem to be used [0: FSK, 1: LoRa] * @param [IN] power Sets the output power [dBm] * @param [IN] fdev Sets the frequency deviation ( FSK only ) * FSK : [Hz] * LoRa: 0 * @param [IN] bandwidth Sets the bandwidth ( LoRa only ) * FSK : 0 * LoRa: [0: 125 kHz, 1: 250 kHz, * 2: 500 kHz, 3: Reserved] * @param [IN] datarate Sets the Datarate * FSK : 600..300000 bits/s * LoRa: [6: 64, 7: 128, 8: 256, 9: 512, * 10: 1024, 11: 2048, 12: 4096 chips] * @param [IN] coderate Sets the coding rate ( LoRa only ) * FSK : N/A ( set to 0 ) * LoRa: [1: 4/5, 2: 4/6, 3: 4/7, 4: 4/8] * @param [IN] preambleLen Sets the preamble length * @param [IN] fixLen Fixed length packets [0: variable, 1: fixed] * @param [IN] crcOn Enables disables the CRC [0: OFF, 1: ON] * @param [IN] freqHopOn Enables disables the intra-packet frequency hopping [0: OFF, 1: ON] (LoRa only) * @param [IN] hopPeriod Number of symbols bewteen each hop (LoRa only) * @param [IN] iqInverted Inverts IQ signals ( LoRa only ) * FSK : N/A ( set to 0 ) * LoRa: [0: not inverted, 1: inverted] * @param [IN] timeout Transmission timeout [ms] */ virtual void 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 ); /*! * @brief Checks if the given RF frequency is supported by the hardware * * @param [IN] frequency RF frequency to be checked * @retval isSupported [true: supported, false: unsupported] */ virtual bool CheckRfFrequency( uint32_t frequency ) = 0; /*! * @brief Computes the packet time on air for the given payload * * \Remark Can only be called once SetRxConfig or SetTxConfig have been called * * @param [IN] modem Radio modem to be used [0: FSK, 1: LoRa] * @param [IN] pktLen Packet payload length * * @retval airTime Computed airTime for the given packet payload length */ virtual uint32_t TimeOnAir ( RadioModems_t modem, uint8_t pktLen ); /*! * @brief Sends the buffer of size. Prepares the packet to be sent and sets * the radio in transmission * * @param [IN]: buffer Buffer pointer * @param [IN]: size Buffer size */ virtual void Send( uint8_t *buffer, uint8_t size ); /*! * @brief Sets the radio in sleep mode */ virtual void Sleep( void ); /*! * @brief Sets the radio in standby mode */ virtual void Standby( void ); /*! * @brief Sets the radio in CAD mode */ virtual void StartCad( void ); /*! * @brief Sets the radio in reception mode for the given time * @param [IN] timeout Reception timeout [ms] * [0: continuous, others timeout] */ virtual void Rx( uint32_t timeout ); /*! * @brief Sets the radio in transmission mode for the given time * @param [IN] timeout Transmission timeout [ms] * [0: continuous, others timeout] */ virtual void Tx( uint32_t timeout ); /*! * @brief Sets the radio in continuous wave transmission mode * * @param [IN]: freq Channel RF frequency * @param [IN]: power Sets the output power [dBm] * @param [IN]: time Transmission mode timeout [s] */ virtual void SetTxContinuousWave( uint32_t freq, int8_t power, uint16_t time ); /*! * @brief Reads the current RSSI value * * @retval rssiValue Current RSSI value in [dBm] */ virtual int16_t GetRssi ( RadioModems_t modem ); /*! * @brief Writes the radio register at the specified address * * @param [IN]: addr Register address * @param [IN]: data New register value */ virtual void Write ( uint8_t addr, uint8_t data ) = 0; /*! * @brief Reads the radio register at the specified address * * @param [IN]: addr Register address * @retval data Register value */ virtual uint8_t Read ( uint8_t addr ) = 0; /*! * @brief Writes multiple radio registers starting at address * * @param [IN] addr First Radio register address * @param [IN] buffer Buffer containing the new register's values * @param [IN] size Number of registers to be written */ virtual void Write( uint8_t addr, uint8_t *buffer, uint8_t size ) = 0; /*! * @brief Reads multiple radio registers starting at address * * @param [IN] addr First Radio register address * @param [OUT] buffer Buffer where to copy the registers data * @param [IN] size Number of registers to be read */ virtual void Read ( uint8_t addr, uint8_t *buffer, uint8_t size ) = 0; /*! * @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 */ virtual void WriteFifo( uint8_t *buffer, uint8_t size ) = 0; /*! * @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 */ virtual void ReadFifo( uint8_t *buffer, uint8_t size ) = 0; /*! * @brief Resets the SX1276 */ virtual void Reset( void ) = 0; /*! * @brief Sets the maximum payload length. * * @param [IN] modem Radio modem to be used [0: FSK, 1: LoRa] * @param [IN] max Maximum payload length in bytes */ virtual void SetMaxPayloadLength( RadioModems_t modem, uint8_t max ); /*! * \brief Sets the network to public or private. Updates the sync byte. * * \remark Applies to LoRa modem only * * \param [IN] enable if true, it enables a public network */ virtual void SetPublicNetwork( bool enable ); //------------------------------------------------------------------------- // Board relative functions //------------------------------------------------------------------------- protected: /*! * @brief Initializes the radio I/Os pins interface */ virtual void IoInit( void ) = 0; /*! * @brief Initializes the radio registers */ virtual void RadioRegistersInit( ) = 0; /*! * @brief Initializes the radio SPI */ virtual void SpiInit( void ) = 0; /*! * @brief Initializes DIO IRQ handlers * * @param [IN] irqHandlers Array containing the IRQ callback functions */ virtual void IoIrqInit( DioIrqHandler *irqHandlers ) = 0; /*! * @brief De-initializes the radio I/Os pins interface. * * \remark Useful when going in MCU lowpower modes */ virtual void IoDeInit( void ) = 0; /*! * @brief Sets the radio output power. * * @param [IN] power Sets the RF output power */ virtual void SetRfTxPower( int8_t power ) = 0; /*! * @brief Gets the board PA selection configuration * * @param [IN] channel Channel frequency in Hz * @retval PaSelect RegPaConfig PaSelect value */ virtual uint8_t GetPaSelect( uint32_t channel ) = 0; /*! * @brief Set the RF Switch I/Os pins in Low Power mode * * @param [IN] status enable or disable */ virtual void SetAntSwLowPower( bool status ) = 0; /*! * @brief Initializes the RF Switch I/Os pins interface */ virtual void AntSwInit( void ) = 0; /*! * @brief De-initializes the RF Switch I/Os pins interface * * \remark Needed to decrease the power consumption in MCU lowpower modes */ virtual void AntSwDeInit( void ) = 0; /*! * @brief Controls the antenna switch if necessary. * * \remark see errata note * * @param [IN] opMode Current radio operating mode */ virtual void SetAntSw( uint8_t opMode ) = 0; protected: /*! * @brief Sets the SX1276 operating mode * * @param [IN] opMode New operating mode */ virtual void SetOpMode( uint8_t opMode ); /* * SX1276 DIO IRQ callback functions prototype */ /*! * @brief DIO 0 IRQ callback */ virtual void OnDio0Irq( void ); /*! * @brief DIO 1 IRQ callback */ virtual void OnDio1Irq( void ); /*! * @brief DIO 2 IRQ callback */ virtual void OnDio2Irq( void ); /*! * @brief DIO 3 IRQ callback */ virtual void OnDio3Irq( void ); /*! * @brief DIO 4 IRQ callback */ virtual void OnDio4Irq( void ); /*! * @brief DIO 5 IRQ callback */ virtual void OnDio5Irq( void ); /*! * @brief Tx & Rx timeout timer callback */ virtual void OnTimeoutIrq( void ); /*! * 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 ); }; #endif // __SX1276_H__