Driver for the SX1276 RF Transceiver

Dependents:   LoRa_PIR LoRaWAN-lmic-app SX1276PingPong LoRaWAN-lmic-app ... more

Revision:
26:d09a8ef807e2
Parent:
22:7f3aab69cca9
--- a/sx1276/sx1276.h	Thu Nov 26 16:55:15 2015 +0000
+++ b/sx1276/sx1276.h	Mon Apr 24 09:26:23 2017 +0000
@@ -21,9 +21,20 @@
 #include "./typedefs/typedefs.h"
 
 /*!
- * Radio wakeup time from SLEEP mode
+ * Radio wake-up time from sleep
+ */
+#define RADIO_WAKEUP_TIME                           1 // [ms]
+
+/*!
+ * Sync word for Private LoRa networks
  */
-#define RADIO_WAKEUP_TIME                           1000 // [us]
+#define LORA_MAC_PRIVATE_SYNCWORD                   0x12
+
+/*!
+ * Sync word for Public LoRa networks
+ */
+#define LORA_MAC_PUBLIC_SYNCWORD                    0x34
+
 
 /*!
  * SX1276 definitions
@@ -67,35 +78,28 @@
     InterruptIn dio3;
     InterruptIn dio4;
     DigitalIn dio5;
-    
+
     bool isRadioActive;
-    
+
     uint8_t boardConnected; //1 = SX1276MB1LAS; 0 = SX1276MB1MAS
-    
-    uint8_t *rxBuffer;
-    
-    uint8_t previousOpMode;
-    
+
+    uint8_t *rxtxBuffer;
+
     /*!
      * 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[] ;
+
+    static const FskBandwidth_t FskBandwidths[];
 protected:
 
     /*!
@@ -108,7 +112,7 @@
 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 ); 
+            PinName dio0, PinName dio1, PinName dio2, PinName dio3, PinName dio4, PinName dio5 );
     SX1276( RadioEvents_t *events );
     virtual ~SX1276( );
     
@@ -127,21 +131,18 @@
      * @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
      *
@@ -152,7 +153,6 @@
      * @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
      *
@@ -164,7 +164,6 @@
      * @retval randomValue    32 bits random value
      */
     virtual uint32_t Random( void );
-    
     /*!
      * @brief Sets the reception parameters
      *
@@ -186,8 +185,8 @@
      * @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 )
+     * @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
@@ -207,7 +206,6 @@
                                uint8_t payloadLen,
                                bool crcOn, bool freqHopOn, uint8_t hopPeriod,
                                bool iqInverted, bool rxContinuous );
-    
     /*!
      * @brief Sets the transmission parameters
      *
@@ -235,14 +233,20 @@
      * @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]
+     * @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
      *
@@ -253,8 +257,7 @@
      *
      * @retval airTime        Computed airTime for the given packet payload length
      */
-    virtual double TimeOnAir ( RadioModems_t modem, uint8_t pktLen );
-    
+    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
@@ -263,43 +266,44 @@
      * @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 [us]
+     * @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 [us]
+     * @param [IN] timeout Transmission timeout [ms]
      *                     [0: continuous, others timeout]
      */
     virtual void Tx( uint32_t timeout );
-    
     /*!
-     * @brief Start a Channel Activity Detection
+     * @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 StartCad( void );    
-    
+    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
      *
@@ -307,7 +311,6 @@
      * @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
      *
@@ -315,7 +318,6 @@
      * @retval data Register value
      */
     virtual uint8_t Read ( uint8_t addr ) = 0;
-    
     /*!
      * @brief Writes multiple radio registers starting at address
      *
@@ -324,7 +326,6 @@
      * @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
      *
@@ -333,7 +334,6 @@
      * @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
      *
@@ -341,7 +341,6 @@
      * @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
      *
@@ -353,7 +352,7 @@
      * @brief Resets the SX1276
      */
     virtual void Reset( void ) = 0;
-    
+
     /*!
      * @brief Sets the maximum payload length.
      *
@@ -361,11 +360,20 @@
      * @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
@@ -381,7 +389,7 @@
      * @brief Initializes the radio SPI
      */
     virtual void SpiInit( void ) = 0;
-    
+
     /*!
      * @brief Initializes DIO IRQ handlers
      *
@@ -397,6 +405,13 @@
     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
@@ -424,21 +439,13 @@
     virtual void AntSwDeInit( void ) = 0;
 
     /*!
-     * @brief Controls the antena switch if necessary.
+     * @brief Controls the antenna switch if necessary.
      *
      * \remark see errata note
      *
-     * @param [IN] rxTx [1: Tx, 0: Rx]
+     * @param [IN] opMode Current radio operating mode
      */
-    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;
+    virtual void SetAntSw( uint8_t opMode ) = 0;
 protected:
 
     /*!
@@ -486,7 +493,7 @@
      * @brief Tx & Rx timeout timer callback
      */
     virtual void OnTimeoutIrq( void );
-    
+
     /*!
      * Returns the known FSK bandwidth registers value
      *