local copy of sx1276 library
Dependents: SX1276_GPS demo_SX1276_standalone
Fork of SX1276Lib by
Diff: sx1276/sx1276.h
- Revision:
- 0:e6ceb13d2d05
- Child:
- 1:f979673946c0
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/sx1276/sx1276.h Mon Aug 18 14:24:46 2014 +0000 @@ -0,0 +1,471 @@ +/* + / _____) _ | | +( (____ _____ ____ _| |_ _____ ____| |__ + \____ \| ___ | (_ _) ___ |/ ___) _ \ + _____) ) ____| | | || |_| ____( (___| | | | +(______/|_____)_|_|_| \__)_____)\____)_| |_| + ( 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" + +#define XTAL_FREQ 32000000 +#define FREQ_STEP 61.03515625 + +#define RX_BUFFER_SIZE 256 + +#define DEFAULT_TIMEOUT 200 //usec +#define RSSI_OFFSET -139.0 + + +/*! + * Constant values need to compute the RSSI value + */ +#define NOISE_ABSOLUTE_ZERO -174.0 +#define NOISE_FIGURE_LF 4.0 +#define NOISE_FIGURE_HF 6.0 +#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 + */ + DigitalOut reset; + + /*! + * SX1276 DIO pins + */ + InterruptIn dio0; + InterruptIn dio1; + InterruptIn dio2; + InterruptIn dio3; + InterruptIn dio4; + DigitalIn dio5; + + bool isRadioActive; + + uint8_t *rxBuffer; + + uint8_t previousOpMode; + + /*! + * Hardware DIO IRQ functions + */ + DioIrqHandler *dioIrq; + + /*! + * Tx and Rx timers + */ + Timeout txTimeoutTimer; + Timeout rxTimeoutTimer; + Timeout rxTimeoutSyncWord; + + /*! + * rxTx: [1: Tx, 0: Rx] + */ + uint8_t rxTx; + + 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( void ( *txDone )( ), void ( *txTimeout ) ( ), void ( *rxDone ) ( uint8_t *payload, uint16_t size, int8_t rssi, int8_t snr ), void ( *rxTimeout ) ( ), void ( *rxError ) ( ), + PinName mosi, PinName miso, PinName sclk, PinName nss, PinName reset, + PinName dio0, PinName dio1, PinName dio2, PinName dio3, PinName dio4, PinName dio5 ); + SX1276( void ( *txDone )( ), void ( *txTimeout ) ( ), void ( *rxDone ) ( uint8_t *payload, uint16_t size, int8_t rssi, int8_t snr ), void ( *rxTimeout ) ( ), void ( *rxError ) ( ) ); + virtual ~SX1276( ); + + //------------------------------------------------------------------------- + // Redefined Radio functions + //------------------------------------------------------------------------- + /*! + * Return current radio status + * + * @param status Radio status. [IDLE, RX_RUNNING, TX_RUNNING] + */ + virtual RadioState GetState( void ); + + /*! + * @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( ModemType modem, uint32_t freq, int8_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 ( LoRa only ) + * FSK : N/A ( set to 0 ) + * LoRa: timeout in symbols + * @param [IN] fixLen Fixed length packets [0: variable, 1: fixed] + * @param [IN] crcOn Enables/Disables the CRC [0: OFF, 1: ON] + * @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 ( ModemType modem, uint32_t bandwidth, + uint32_t datarate, uint8_t coderate, + uint32_t bandwidthAfc, uint16_t preambleLen, + uint16_t symbTimeout, bool fixLen, + bool crcOn, bool iqInverted, bool rxContinuous ); + + /*! + * @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] iqInverted Inverts IQ signals ( LoRa only ) + * FSK : N/A ( set to 0 ) + * LoRa: [0: not inverted, 1: inverted] + * @param [IN] timeout Transmission timeout [us] + */ + virtual void SetTxConfig( ModemType modem, int8_t power, uint32_t fdev, + uint32_t bandwidth, uint32_t datarate, + uint8_t coderate, uint16_t preambleLen, + bool fixLen, bool crcOn, + bool iqInverted, uint32_t timeout ); + + /*! + * @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 double TimeOnAir ( ModemType 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 reception mode for the given time + * @param [IN] timeout Reception timeout [us] + * [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 [us] + * [0: continuous, others timeout] + */ + virtual void Tx( uint32_t timeout ); + + /*! + * @brief Reads the current RSSI value + * + * @retval rssiValue Current RSSI value in [dBm] + */ + virtual int8_t GetRssi ( ModemType 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; + + //------------------------------------------------------------------------- + // 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 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 antena switch if necessary. + * + * \remark see errata note + * + * @param [IN] rxTx [1: Tx, 0: Rx] + */ + virtual void SetAntSw( uint8_t rxTx ) = 0; + + /*! + * @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; +protected: + + /*! + * @brief Sets the SX1276 operating mode + * + * @param [IN] opMode New operating mode + */ + virtual void SetOpMode( uint8_t opMode ); + + /*! + * @brief Configures the SX1276 with the given modem + * + * @param [IN] modem Modem to be used [0: FSK, 1: LoRa] + */ + virtual void SetModem( ModemType modem ); + + /* + * 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__ +