li lei
1
Diff: radio/radio.h
- Revision:
- 0:7e14d7c443f1
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/radio/radio.h Sat Oct 08 02:35:14 2016 +0000
@@ -0,0 +1,346 @@
+/*
+ / _____) _ | |
+( (____ _____ ____ _| |_ _____ ____| |__
+ \____ \| ___ | (_ _) ___ |/ ___) _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+ (C) 2014 Semtech
+
+Description: Interface for the radios, contains the main functions that a radio needs, and 5 callback functions
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+
+Maintainers: Miguel Luis, Gregory Cristian and Nicolas Huguenin
+*/
+#ifndef __RADIO_H__
+#define __RADIO_H__
+
+#include "mbed.h"
+
+#include "./enums/enums.h"
+
+/*!
+ * @brief Radio driver callback functions
+ */
+typedef struct
+{
+ /*!
+ * @brief Tx Done callback prototype.
+ */
+ void ( *TxDone )( void );
+ /*!
+ * @brief Tx Timeout callback prototype.
+ */
+ void ( *TxTimeout )( void );
+ /*!
+ * @brief Rx Done callback prototype.
+ *
+ * @param [IN] payload Received buffer pointer
+ * @param [IN] size Received buffer size
+ * @param [IN] rssi RSSI value computed while receiving the frame [dBm]
+ * @param [IN] snr Raw SNR value given by the radio hardware
+ * FSK : N/A ( set to 0 )
+ * LoRa: SNR value in dB
+ */
+ void ( *RxDone )( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr );
+ /*!
+ * @brief Rx Timeout callback prototype.
+ */
+ void ( *RxTimeout )( void );
+ /*!
+ * @brief Rx Error callback prototype.
+ */
+ void ( *RxError )( void );
+ /*!
+ * \brief FHSS Change Channel callback prototype.
+ *
+ * \param [IN] currentChannel Index number of the current channel
+ */
+ void ( *FhssChangeChannel )( uint8_t currentChannel );
+
+ /*!
+ * @brief CAD Done callback prototype.
+ *
+ * @param [IN] channelDetected Channel Activity detected during the CAD
+ */
+ void ( *CadDone ) ( bool channelActivityDetected );
+}RadioEvents_t;
+
+/*!
+ * Interface for the radios, contains the main functions that a radio needs, and 5 callback functions
+ */
+class Radio
+{
+protected:
+ RadioEvents_t* RadioEvents;
+
+public:
+ //-------------------------------------------------------------------------
+ // Constructor
+ //-------------------------------------------------------------------------
+ /*!
+ * @brief Constructor of the radio object, the parameters are the callback functions described in the header.
+ *
+ * @param [IN] events Structure containing the driver callback functions
+ */
+ Radio( RadioEvents_t *events );
+ virtual ~Radio( ) {};
+
+ //-------------------------------------------------------------------------
+ // Pure virtual functions
+ //-------------------------------------------------------------------------
+
+ /*!
+ * @brief Initializes the radio
+ *
+ * @param [IN] events Structure containing the driver callback functions
+ */
+ virtual void Init( RadioEvents_t *events ) = 0;
+
+ /*!
+ * @brief Return current radio status
+ *
+ * @param status Radio status.[RF_IDLE, RF_RX_RUNNING, RF_TX_RUNNING]
+ */
+ virtual RadioState GetStatus( void ) = 0;
+
+ /*!
+ * @brief Configures the radio with the given modem
+ *
+ * @param [IN] modem Modem to be used [0: FSK, 1: LoRa]
+ */
+ virtual void SetModem( RadioModems_t modem ) = 0;
+
+ /*!
+ * @brief Sets the channel frequency
+ *
+ * @param [IN] freq Channel RF frequency
+ */
+ virtual void SetChannel( uint32_t freq ) = 0;
+
+ /*!
+ * @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 ) = 0;
+
+ /*!
+ * @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 )= 0;
+
+ /*!
+ * @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] 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 ) = 0;
+
+ /*!
+ * @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 [us]
+ */
+ 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 ) = 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;
+
+ /*!
+ * @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 ( RadioModems_t modem, uint8_t pktLen ) = 0;
+
+ /*!
+ * @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 ) = 0;
+
+ /*!
+ * @brief Sets the radio in sleep mode
+ */
+ virtual void Sleep( void ) = 0;
+
+ /*!
+ * @brief Sets the radio in standby mode
+ */
+ virtual void Standby( void ) = 0;
+
+ /*!
+ * @brief Sets the radio in CAD mode
+ */
+ virtual void StartCad( void ) = 0;
+
+ /*!
+ * @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 ) = 0;
+
+ /*!
+ * @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 ) = 0;
+
+ /*!
+ * @brief Reads the current RSSI value
+ *
+ * @retval rssiValue Current RSSI value in [dBm]
+ */
+ virtual int16_t GetRssi ( RadioModems_t modem ) = 0;
+
+ /*!
+ * @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 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 ) = 0;
+};
+
+#endif // __RADIO_H__