SxRadio.h

00001 /*
00002  / _____)             _              | |
00003 ( (____  _____ ____ _| |_ _____  ____| |__
00004  \____ \| ___ |    (_   _) ___ |/ ___)  _ \
00005  _____) ) ____| | | || |_| ____( (___| | | |
00006 (______/|_____)_|_|_| \__)_____)\____)_| |_|
00007     (C)2013 Semtech
00008 
00009 Description: Generic radio driver definition
00010 
00011 License: Revised BSD License, see LICENSE.TXT file include in the project
00012 
00013 Maintainer: Miguel Luis and Gregory Cristian
00014 */
00015 #ifndef __SXRADIO_H__
00016 #define __SXRADIO_H__
00017 
00018 #include <stdint.h>
00019 #include "SxRadioEvents.h"
00020 
00021 /*!
00022  * \brief Radio driver definition
00023  */
00024 class SxRadio
00025 {
00026 public:
00027     /*!
00028      * Radio driver supported modems
00029      */
00030     typedef enum
00031     {
00032         MODEM_FSK = 0,
00033         MODEM_LORA,
00034     }RadioModems_t ;
00035 
00036     /*!
00037      * Radio driver internal state machine states definition
00038      */
00039     typedef enum
00040     {
00041         RF_IDLE = 0,
00042         RF_RX_RUNNING,
00043         RF_TX_RUNNING,
00044         RF_CAD,
00045         RF_LBT
00046     }RadioState_t ;
00047 
00048     SxRadio(uint32_t WakeupTime) : WakeupTime(WakeupTime), freq_offset(0), State(RF_IDLE), Modem(MODEM_LORA) { }
00049     virtual ~SxRadio() {};
00050 
00051     /*!
00052      * \brief Initializes the radio
00053      *
00054      * \param [IN] events Structure containing the driver callback functions
00055      */
00056     virtual void Init( SxRadioEvents *events ) = 0;
00057     /*!
00058      * \brief Prepares the radio for destruction
00059      */
00060     virtual void Terminate( void ) = 0;
00061     /*!
00062      * Return current radio status
00063      *
00064      * \param status Radio status.[RF_IDLE, RF_RX_RUNNING, RF_TX_RUNNING]
00065      */
00066     virtual RadioState_t  Status ( void ) { return State; }
00067     /*!
00068      * \brief Configures the radio with the given modem
00069      *
00070      * \param [IN] modem Modem to be used [0: FSK, 1: LoRa]
00071      */
00072     virtual void SetModem( RadioModems_t  modem ) = 0;
00073     virtual RadioModems_t  GetModem( void ) { return Modem; }
00074     /*!
00075      * \brief Sets the channel frequency
00076      *
00077      * \param [IN] freq         Channel RF frequency
00078      */
00079     virtual void SetChannel( uint32_t freq ) = 0;
00080     /*!
00081      * \brief Sets the channels configuration
00082      *
00083      * \param [IN] modem      Radio modem to be used [0: FSK, 1: LoRa]
00084      * \param [IN] freq       Channel RF frequency
00085      * \param [IN] rssiThresh RSSI threshold
00086      * \param [IN] rssiVal    pointer to variable to hold RSSI value if desired - ignored if NULL
00087      *
00088      * \retval isFree         [true: Channel is free, false: Channel is not free]
00089      */
00090     virtual bool IsChannelFree( RadioModems_t  modem, uint32_t freq, int16_t rssiThresh, uint32_t timeout = 5000, int16_t *rssiVal = NULL ) = 0;
00091     /*!
00092      * \brief Generates a 32 bits random value based on the RSSI readings
00093      *
00094      * \remark This function sets the radio in LoRa modem mode and disables
00095      *         all interrupts.
00096      *         After calling this function either Radio.SetRxConfig or
00097      *         Radio.SetTxConfig functions must be called.
00098      *
00099      * \retval randomValue    32 bits random value
00100      */
00101     virtual uint32_t Random( void ) = 0;
00102     /*!
00103      * \brief Sets the reception parameters
00104      *
00105      * \param [IN] modem        Radio modem to be used [0: FSK, 1: LoRa]
00106      * \param [IN] bandwidth    Sets the bandwidth
00107      *                          FSK : >= 2600 and <= 250000 Hz
00108      *                          LoRa: [0: 125 kHz, 1: 250 kHz,
00109      *                                 2: 500 kHz, 3: Reserved]
00110      * \param [IN] datarate     Sets the Datarate
00111      *                          FSK : 600..300000 bits/s
00112      *                          LoRa: [6: 64, 7: 128, 8: 256, 9: 512,
00113      *                                10: 1024, 11: 2048, 12: 4096  chips]
00114      * \param [IN] coderate     Sets the coding rate (LoRa only)
00115      *                          FSK : N/A ( set to 0 )
00116      *                          LoRa: [1: 4/5, 2: 4/6, 3: 4/7, 4: 4/8]
00117      * \param [IN] bandwidthAfc Sets the AFC Bandwidth (FSK only)
00118      *                          FSK : >= 2600 and <= 250000 Hz
00119      *                          LoRa: N/A ( set to 0 )
00120      * \param [IN] preambleLen  Sets the Preamble length
00121      *                          FSK : Number of bytes
00122      *                          LoRa: Length in symbols (the hardware adds 4 more symbols)
00123      * \param [IN] symbTimeout  Sets the RxSingle timeout value (LoRa only)
00124      *                          FSK : N/A ( set to 0 )
00125      *                          LoRa: timeout in symbols
00126      * \param [IN] fixLen       Fixed length packets [0: variable, 1: fixed]
00127      * \param [IN] payloadLen   Sets payload length when fixed length is used
00128      * \param [IN] crcOn        Enables/Disables the CRC [0: OFF, 1: ON]
00129      * \param [IN] FreqHopOn    Enables disables the intra-packet frequency hopping
00130      *                          FSK : N/A ( set to 0 )
00131      *                          LoRa: [0: OFF, 1: ON]
00132      * \param [IN] HopPeriod    Number of symbols bewteen each hop
00133      *                          FSK : N/A ( set to 0 )
00134      *                          LoRa: Number of symbols
00135      * \param [IN] iqInverted   Inverts IQ signals (LoRa only)
00136      *                          FSK : N/A ( set to 0 )
00137      *                          LoRa: [0: not inverted, 1: inverted]
00138      * \param [IN] rxContinuous Sets the reception in continuous mode
00139      *                          [false: single mode, true: continuous mode]
00140      * \param [IN] fskPad       Duration in ms to increase FSK rx window
00141      *                          FSK: time in ms to increase FSK rx window duration
00142      *                          LoRa: N/A
00143      */
00144     virtual void SetRxConfig( RadioModems_t  modem, uint32_t bandwidth,
00145                               uint32_t datarate, uint8_t coderate,
00146                               uint32_t bandwidthAfc, uint16_t preambleLen,
00147                               uint16_t symbTimeout, bool fixLen,
00148                               uint8_t payloadLen,
00149                               bool crcOn, bool FreqHopOn, uint8_t HopPeriod,
00150                               bool iqInverted, bool rxContinuous , uint32_t fskPad = 0) = 0;
00151     /*!
00152      * \brief Sets the transmission parameters
00153      *
00154      * \param [IN] modem        Radio modem to be used [0: FSK, 1: LoRa]
00155      * \param [IN] power        Sets the output power [dBm]
00156      * \param [IN] fdev         Sets the frequency deviation (FSK only)
00157      *                          FSK : [Hz]
00158      *                          LoRa: 0
00159      * \param [IN] bandwidth    Sets the bandwidth (LoRa only)
00160      *                          FSK : 0
00161      *                          LoRa: [0: 125 kHz, 1: 250 kHz,
00162      *                                 2: 500 kHz, 3: Reserved]
00163      * \param [IN] datarate     Sets the Datarate
00164      *                          FSK : 600..300000 bits/s
00165      *                          LoRa: [6: 64, 7: 128, 8: 256, 9: 512,
00166      *                                10: 1024, 11: 2048, 12: 4096  chips]
00167      * \param [IN] coderate     Sets the coding rate (LoRa only)
00168      *                          FSK : N/A ( set to 0 )
00169      *                          LoRa: [1: 4/5, 2: 4/6, 3: 4/7, 4: 4/8]
00170      * \param [IN] preambleLen  Sets the preamble length
00171      *                          FSK : Number of bytes
00172      *                          LoRa: Length in symbols (the hardware adds 4 more symbols)
00173      * \param [IN] fixLen       Fixed length packets [0: variable, 1: fixed]
00174      * \param [IN] crcOn        Enables disables the CRC [0: OFF, 1: ON]
00175      * \param [IN] FreqHopOn    Enables disables the intra-packet frequency hopping
00176      *                          FSK : N/A ( set to 0 )
00177      *                          LoRa: [0: OFF, 1: ON]
00178      * \param [IN] HopPeriod    Number of symbols bewteen each hop
00179      *                          FSK : N/A ( set to 0 )
00180      *                          LoRa: Number of symbols
00181      * \param [IN] iqInverted   Inverts IQ signals (LoRa only)
00182      *                          FSK : N/A ( set to 0 )
00183      *                          LoRa: [0: not inverted, 1: inverted]
00184      * \param [IN] timeout      Transmission timeout [us]
00185      */
00186     virtual void SetTxConfig( RadioModems_t  modem, int8_t power, uint32_t fdev,
00187                               uint32_t bandwidth, uint32_t datarate,
00188                               uint8_t coderate, uint16_t preambleLen,
00189                               bool fixLen, bool crcOn, bool FreqHopOn,
00190                               uint8_t HopPeriod, bool iqInverted, uint32_t timeout ) = 0;
00191 
00192     virtual void SetTxPower(int8_t power) = 0;
00193 
00194     virtual void SetTxContinuousWave( uint32_t freq, int8_t power, uint16_t time ) = 0;
00195 
00196     /*!
00197      * \brief Checks if the given RF frequency is supported by the hardware
00198      *
00199      * \param [IN] frequency RF frequency to be checked
00200      * \retval isSupported [true: supported, false: unsupported]
00201      */
00202     virtual bool CheckRfFrequency( uint32_t frequency ) { return true; }
00203     /*!
00204      * \brief Computes the packet time on air for the given payload
00205      *
00206      * \Remark Can only be called once SetRxConfig or SetTxConfig have been called
00207      *
00208      * \param [IN] modem      Radio modem to be used [0: FSK, 1: LoRa]
00209      * \param [IN] pktLen     Packet payload length
00210      *
00211      * \retval airTime        Computed airTime for the given packet payload length
00212      */
00213     virtual double TimeOnAir( RadioModems_t  modem, uint8_t pktLen ) = 0;
00214     /*!
00215      * \brief Sends the buffer of size. Prepares the packet to be sent and sets
00216      *        the radio in transmission
00217      *
00218      * \param [IN]: buffer     Buffer pointer
00219      * \param [IN]: size       Buffer size
00220      */
00221     virtual void Send( const uint8_t *buffer, uint8_t size ) = 0;
00222     /*!
00223      * \brief Sets the radio in sleep mode
00224      */
00225     virtual void Sleep( void ) = 0;
00226     /*!
00227      * \brief Sets the radio in standby mode
00228      */
00229     virtual void Standby( void ) = 0;
00230     /*!
00231      * \brief Sets the radio in reception mode for the given time
00232      * \param [IN] timeout Reception timeout [us]
00233      *                     [0: continuous, others timeout]
00234      */
00235     virtual void Rx( uint32_t timeout ) = 0;
00236     /*!
00237      * \brief Start a Channel Activity Detection
00238      */
00239     virtual void StartCad( void ) = 0;
00240     /*!
00241      * \brief Reads the current RSSI value
00242      *
00243      * \retval rssiValue Current RSSI value in [dBm]
00244      */
00245     virtual int16_t Rssi( RadioModems_t  modem ) = 0;
00246     /*!
00247      * \brief Writes the radio register at the specified address
00248      *
00249      * \param [IN]: addr Register address
00250      * \param [IN]: data New register value
00251      */
00252     virtual void Write( uint8_t addr, uint8_t data ) = 0;
00253     /*!
00254      * \brief Reads the radio register at the specified address
00255      *
00256      * \param [IN]: addr Register address
00257      * \retval data Register value
00258      */
00259     virtual uint8_t Read ( uint8_t addr ) = 0;
00260     /*!
00261      * \brief Writes multiple radio registers starting at address
00262      *
00263      * \param [IN] addr   First Radio register address
00264      * \param [IN] buffer Buffer containing the new register's values
00265      * \param [IN] size   Number of registers to be written
00266      */
00267     virtual void WriteBuffer( uint8_t addr, const uint8_t *buffer, uint8_t size ) = 0;
00268     /*!
00269      * \brief Reads multiple radio registers starting at address
00270      *
00271      * \param [IN] addr First Radio register address
00272      * \param [OUT] buffer Buffer where to copy the registers data
00273      * \param [IN] size Number of registers to be read
00274      */
00275     virtual void ReadBuffer( uint8_t addr, uint8_t *buffer, uint8_t size ) = 0;
00276 
00277     virtual void SignalMacEvent(void) {};
00278     virtual void SignalLinkEvent(void) {};
00279 
00280     virtual void ResetRadio(void) {};
00281 
00282     virtual uint32_t GetTimeOnAir(void) = 0;
00283 
00284     void GrabMutex(void) { mutex .lock(); }
00285     void ReleaseMutex(void) { mutex .unlock(); }
00286 
00287     int32_t GetFrequencyOffset() { return freq_offset; }
00288     void SetFrequencyOffset(int32_t offset) { freq_offset = offset; }
00289 
00290     const uint32_t WakeupTime;
00291 
00292 
00293 
00294 
00295 protected:
00296     int32_t freq_offset;
00297 
00298     RadioState_t  State;
00299 
00300     RadioModems_t  Modem;
00301 
00302     /*!
00303      * Access protection
00304      */
00305     Mutex mutex ;
00306 
00307 };
00308 
00309 #endif // __SXRADIO_H__
00310