Diff: mac/LoRaMac.h

Revision:

0:c58229885f95

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mac/LoRaMac.h	Wed Dec 16 14:25:16 2015 +0000
@@ -0,0 +1,583 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+    (C)2013 Semtech
+Description: LoRa MAC layer implementation
+License: Revised BSD License, see LICENSE.TXT file include in the project
+Maintainer: Miguel Luis and Gregory Cristian
+*/
+#ifndef __LORAMAC_H__
+#define __LORAMAC_H__
+
+// Includes board dependent definitions such as channels frequencies
+#include "LoRaMac-board.h"
+#include "enums.h"
+#define USE_BAND_868
+/*!
+ * Beacon interval in us
+ */
+#define BEACON_INTERVAL                             128000000
+
+/*!
+ * Class A&B receive delay in us
+ */
+#define RECEIVE_DELAY1                              1000000
+#define RECEIVE_DELAY2                              2000000
+
+/*!
+ * Join accept receive delay in us
+ */
+#define JOIN_ACCEPT_DELAY1                          5000000
+#define JOIN_ACCEPT_DELAY2                          6000000
+
+/*!
+ * Class A&B maximum receive window delay in us
+ */
+#define MAX_RX_WINDOW                               3000000
+
+/*!
+ * Maximum allowed gap for the FCNT field
+ */
+#define MAX_FCNT_GAP                                16384
+
+/*!
+ * ADR acknowledgement counter limit
+ */
+#define ADR_ACK_LIMIT                               64
+
+/*!
+ * Number of ADR acknowledgement requests before returning to default datarate
+ */
+#define ADR_ACK_DELAY                               32
+
+/*!
+ * Number of seconds after the start of the second reception window without
+ * receiving an acknowledge.
+ * AckTimeout = ACK_TIMEOUT + Random( -ACK_TIMEOUT_RND, ACK_TIMEOUT_RND )
+ */
+#define ACK_TIMEOUT                                 2000000
+
+/*!
+ * Random number of seconds after the start of the second reception window without
+ * receiving an acknowledge
+ * AckTimeout = ACK_TIMEOUT + Random( -ACK_TIMEOUT_RND, ACK_TIMEOUT_RND )
+ */
+#define ACK_TIMEOUT_RND                             1000000
+
+/*!
+ * Check the Mac layer state every MAC_STATE_CHECK_TIMEOUT
+ */
+#define MAC_STATE_CHECK_TIMEOUT                     1000000
+
+/*!
+ * Maximum number of times the MAC layer tries to get an acknowledge.
+ */
+#define MAX_ACK_RETRIES                             8
+
+/*!
+ * RSSI free threshold
+ */
+#define RSSI_FREE_TH                                ( int8_t )( -90 ) // [dBm]
+
+/*! 
+ * Frame direction definition
+ */
+#define UP_LINK                                     0
+#define DOWN_LINK                                   1
+
+/*!
+ * Sets the length of the LoRaMAC footer field.
+ * Mainly indicates the MIC field length
+ */
+#define LORAMAC_MFR_LEN                             4
+
+/*!
+ * Syncword for Private LoRa networks
+ */
+#define LORA_MAC_PRIVATE_SYNCWORD                   0x12
+
+/*!
+ * Syncword for Public LoRa networks
+ */
+#define LORA_MAC_PUBLIC_SYNCWORD                    0x34
+
+/*!
+ * LoRaWAN devices classes definition
+ */
+typedef enum
+{
+    CLASS_A,
+    CLASS_B,
+    CLASS_C,
+}DeviceClass_t;
+
+/*!
+ * LoRaMAC channels parameters definition
+ */
+typedef union
+{
+    int8_t Value;
+    struct
+    {
+        int8_t Min : 4;
+        int8_t Max : 4;
+    }Fields;
+}DrRange_t;
+
+typedef struct
+{
+    uint16_t DCycle;
+    int8_t TxMaxPower;
+    uint64_t LastTxDoneTime;
+    uint64_t TimeOff;
+}Band_t;
+
+typedef struct
+{
+    uint32_t Frequency; // Hz
+    DrRange_t DrRange;  // Max datarate [0: SF12, 1: SF11, 2: SF10, 3: SF9, 4: SF8, 5: SF7, 6: SF7, 7: FSK]
+                        // Min datarate [0: SF12, 1: SF11, 2: SF10, 3: SF9, 4: SF8, 5: SF7, 6: SF7, 7: FSK]
+    uint8_t Band;       // Band index
+}ChannelParams_t;
+
+typedef struct
+{
+    uint32_t Frequency; // Hz
+    uint8_t  Datarate;  // [0: SF12, 1: SF11, 2: SF10, 3: SF9, 4: SF8, 5: SF7, 6: SF7, 7: FSK]
+}Rx2ChannelParams_t;
+
+typedef struct MulticastParams_s
+{
+    uint32_t Address;
+    uint8_t NwkSKey[16];
+    uint8_t AppSKey[16];
+    uint32_t DownLinkCounter;
+    struct MulticastParams_s *Next;
+}MulticastParams_t;
+
+/*!
+ * LoRaMAC frame types
+ */
+typedef enum
+{
+    FRAME_TYPE_JOIN_REQ              = 0x00,
+    FRAME_TYPE_JOIN_ACCEPT           = 0x01,
+    FRAME_TYPE_DATA_UNCONFIRMED_UP   = 0x02,
+    FRAME_TYPE_DATA_UNCONFIRMED_DOWN = 0x03,
+    FRAME_TYPE_DATA_CONFIRMED_UP     = 0x04,
+    FRAME_TYPE_DATA_CONFIRMED_DOWN   = 0x05,
+    FRAME_TYPE_RFU                   = 0x06,
+    FRAME_TYPE_PROPRIETARY           = 0x07,
+}LoRaMacFrameType_t;
+
+/*!
+ * LoRaMAC mote MAC commands
+ */
+typedef enum
+{
+    MOTE_MAC_LINK_CHECK_REQ          = 0x02,
+    MOTE_MAC_LINK_ADR_ANS            = 0x03,
+    MOTE_MAC_DUTY_CYCLE_ANS          = 0x04,
+    MOTE_MAC_RX_PARAM_SETUP_ANS      = 0x05,
+    MOTE_MAC_DEV_STATUS_ANS          = 0x06,
+    MOTE_MAC_NEW_CHANNEL_ANS         = 0x07,
+    MOTE_MAC_RX_TIMING_SETUP_ANS     = 0x08,
+}LoRaMacMoteCmd_t;
+
+/*!
+ * LoRaMAC server MAC commands
+ */
+typedef enum
+{
+    SRV_MAC_LINK_CHECK_ANS           = 0x02,
+    SRV_MAC_LINK_ADR_REQ             = 0x03,
+    SRV_MAC_DUTY_CYCLE_REQ           = 0x04,
+    SRV_MAC_RX_PARAM_SETUP_REQ       = 0x05,
+    SRV_MAC_DEV_STATUS_REQ           = 0x06,
+    SRV_MAC_NEW_CHANNEL_REQ          = 0x07,
+    SRV_MAC_RX_TIMING_SETUP_REQ      = 0x08,
+}LoRaMacSrvCmd_t;
+
+/*!
+ * LoRaMAC Battery level indicator
+ */
+typedef enum
+{
+    BAT_LEVEL_EXT_SRC                = 0x00,
+    BAT_LEVEL_EMPTY                  = 0x01,
+    BAT_LEVEL_FULL                   = 0xFE,
+    BAT_LEVEL_NO_MEASURE             = 0xFF,
+}LoRaMacBatteryLevel_t;
+
+/*!
+ * LoRaMAC header field definition
+ */
+typedef union
+{
+    uint8_t Value;
+    struct
+    {
+        uint8_t Major           : 2;
+        uint8_t RFU             : 3;
+        uint8_t MType           : 3;
+    }Bits;
+}LoRaMacHeader_t;
+
+/*!
+ * LoRaMAC frame header field definition
+ */
+typedef union
+{
+    uint8_t Value;
+    struct
+    {
+        uint8_t FOptsLen        : 4;
+        uint8_t FPending        : 1;
+        uint8_t Ack             : 1;
+        uint8_t AdrAckReq       : 1;
+        uint8_t Adr             : 1;
+    }Bits;
+}LoRaMacFrameCtrl_t;
+
+/*!
+ * LoRaMAC event flags
+ */
+typedef union
+{
+    uint8_t Value;
+    struct
+    {
+        uint8_t Tx              : 1;
+        uint8_t Rx              : 1;
+        uint8_t RxData          : 1;
+        uint8_t Multicast       : 1;
+        uint8_t RxSlot          : 2;
+        uint8_t LinkCheck       : 1;
+        uint8_t JoinAccept      : 1;
+    }Bits;
+}LoRaMacEventFlags_t;
+
+typedef enum
+{
+    LORAMAC_EVENT_INFO_STATUS_OK = 0,
+    LORAMAC_EVENT_INFO_STATUS_ERROR,
+    LORAMAC_EVENT_INFO_STATUS_TX_TIMEOUT,
+    LORAMAC_EVENT_INFO_STATUS_RX2_TIMEOUT,
+    LORAMAC_EVENT_INFO_STATUS_RX2_ERROR,
+    LORAMAC_EVENT_INFO_STATUS_JOIN_FAIL,
+    LORAMAC_EVENT_INFO_STATUS_DOWNLINK_FAIL,
+    LORAMAC_EVENT_INFO_STATUS_ADDRESS_FAIL,
+    LORAMAC_EVENT_INFO_STATUS_MIC_FAIL,
+}LoRaMacEventInfoStatus_t;
+
+/*!
+ * LoRaMAC event information
+ */
+typedef struct
+{
+    LoRaMacEventInfoStatus_t Status;
+    bool TxAckReceived;
+    uint8_t TxNbRetries;
+    uint8_t TxDatarate;
+    uint8_t RxPort;
+    uint8_t *RxBuffer;
+    uint8_t RxBufferSize;
+    int16_t RxRssi;
+    uint8_t RxSnr;
+    uint16_t Energy;
+    uint8_t DemodMargin;
+    uint8_t NbGateways;
+}LoRaMacEventInfo_t;
+
+/*!
+ * LoRaMAC events structure
+ * Used to notify upper layers of MAC events
+ */
+typedef struct sLoRaMacCallbacks
+{
+    /*!
+     * MAC layer event callback prototype.
+     *
+     * \param [IN] flags Bit field indicating the MAC events occurred
+     * \param [IN] info  Details about MAC events occurred
+     */
+    void ( *MacEvent )( LoRaMacEventFlags_t *flags, LoRaMacEventInfo_t *info );
+    /*!
+     * Function callback to get the current battery level
+     *
+     * \retval batteryLevel Current battery level
+     */
+    uint8_t ( *GetBatteryLevel )( void );
+}LoRaMacCallbacks_t;
+
+/*!
+ * LoRaMAC layer initialization
+ *
+ * \param [IN] callabcks       Pointer to a structure defining the LoRaMAC
+ *                             callback functions.
+ */
+void LoRaMacInit( LoRaMacCallbacks_t *callabcks );
+
+/*!
+ * Enables/Disables the ADR (Adaptive Data Rate)
+ * 
+ * \param [IN] enable [true: ADR ON, false: ADR OFF]
+ */
+void LoRaMacSetAdrOn( bool enable );
+
+/*!
+ * Initializes the network IDs. Device address, 
+ * network session AES128 key and application session AES128 key.
+ *
+ * \remark To be only used when Over-the-Air activation isn't used.
+ *
+ * \param [IN] netID   24 bits network identifier 
+ *                     ( provided by network operator )
+ * \param [IN] devAddr 32 bits device address on the network 
+ *                     (must be unique to the network)
+ * \param [IN] nwkSKey Pointer to the network session AES128 key array
+ *                     ( 16 bytes )
+ * \param [IN] appSKey Pointer to the application session AES128 key array
+ *                     ( 16 bytes )
+ */
+void LoRaMacInitNwkIds( uint32_t netID, uint32_t devAddr, uint8_t *nwkSKey, uint8_t *appSKey );
+
+/*
+ * TODO: Add documentation
+ */
+void LoRaMacMulticastChannelAdd( MulticastParams_t *channelParam );
+
+/*
+ * TODO: Add documentation
+ */
+void LoRaMacMulticastChannelRemove( MulticastParams_t *channelParam );
+
+/*!
+ * Initiates the Over-the-Air activation 
+ * 
+ * \param [IN] devEui Pointer to the device EUI array ( 8 bytes )
+ * \param [IN] appEui Pointer to the application EUI array ( 8 bytes )
+ * \param [IN] appKey Pointer to the application AES128 key array ( 16 bytes )
+ *
+ * \retval status [0: OK, 1: Tx error, 2: Already joined a network]
+ */
+uint8_t LoRaMacJoinReq( uint8_t *devEui, uint8_t *appEui, uint8_t *appKey );
+
+/*!
+ * Sends a LinkCheckReq MAC command on the next uplink frame
+ *
+ * \retval status Function status [0: OK, 1: Busy]
+ */
+uint8_t LoRaMacLinkCheckReq( void );
+
+/*!
+ * LoRaMAC layer send frame
+ *
+ * \param [IN] fPort       MAC payload port (must be > 0)
+ * \param [IN] fBuffer     MAC data buffer to be sent
+ * \param [IN] fBufferSize MAC data buffer size
+ *
+ * \retval status          [0: OK, 1: Busy, 2: No network joined,
+ *                          3: Length or port error, 4: Unknown MAC command
+ *                          5: Unable to find a free channel
+ *                          6: Device switched off]
+ */
+uint8_t LoRaMacSendFrame( uint8_t fPort, void *fBuffer, uint16_t fBufferSize );
+
+/*!
+ * LoRaMAC layer send frame
+ *
+ * \param [IN] fPort       MAC payload port (must be > 0)
+ * \param [IN] fBuffer     MAC data buffer to be sent
+ * \param [IN] fBufferSize MAC data buffer size
+ * \param [IN] fBufferSize MAC data buffer size
+ * \param [IN] nbRetries   Number of retries to receive the acknowledgement
+ *
+ * \retval status          [0: OK, 1: Busy, 2: No network joined,
+ *                          3: Length or port error, 4: Unknown MAC command
+ *                          5: Unable to find a free channel
+ *                          6: Device switched off]
+ */
+uint8_t LoRaMacSendConfirmedFrame( uint8_t fPort, void *fBuffer, uint16_t fBufferSize, uint8_t nbRetries );
+
+/*!
+ * ============================================================================
+ * = LoRaMac test functions                                                   =
+ * ============================================================================
+ */
+
+/*!
+ * LoRaMAC layer generic send frame
+ *
+ * \param [IN] macHdr      MAC header field
+ * \param [IN] fOpts       MAC commands buffer
+ * \param [IN] fPort       MAC payload port
+ * \param [IN] fBuffer     MAC data buffer to be sent
+ * \param [IN] fBufferSize MAC data buffer size
+ * \retval status          [0: OK, 1: Busy, 2: No network joined,
+ *                          3: Length or port error, 4: Unknown MAC command
+ *                          5: Unable to find a free channel
+ *                          6: Device switched off]
+ */
+uint8_t LoRaMacSend( LoRaMacHeader_t *macHdr, uint8_t *fOpts, uint8_t fPort, void *fBuffer, uint16_t fBufferSize );
+
+/*!
+ * LoRaMAC layer frame buffer initialization.
+ *
+ * \param [IN] channel     Channel parameters
+ * \param [IN] macHdr      MAC header field
+ * \param [IN] fCtrl       MAC frame control field
+ * \param [IN] fOpts       MAC commands buffer
+ * \param [IN] fPort       MAC payload port
+ * \param [IN] fBuffer     MAC data buffer to be sent
+ * \param [IN] fBufferSize MAC data buffer size
+ * \retval status          [0: OK, 1: N/A, 2: No network joined,
+ *                          3: Length or port error, 4: Unknown MAC command]
+ */
+uint8_t LoRaMacPrepareFrame( ChannelParams_t channel,LoRaMacHeader_t *macHdr, LoRaMacFrameCtrl_t *fCtrl, uint8_t *fOpts, uint8_t fPort, void *fBuffer, uint16_t fBufferSize );
+
+/*!
+ * LoRaMAC layer prepared frame buffer transmission with channel specification
+ *
+ * \remark LoRaMacPrepareFrame must be called at least once before calling this
+ *         function.
+ *
+ * \param [IN] channel     Channel parameters
+ * \retval status          [0: OK, 1: Busy]
+ */
+uint8_t LoRaMacSendFrameOnChannel( ChannelParams_t channel );
+
+/*!
+ * LoRaMAC layer generic send frame with channel specification
+ *
+ * \param [IN] channel     Channel parameters
+ * \param [IN] macHdr      MAC header field
+ * \param [IN] fCtrl       MAC frame control field
+ * \param [IN] fOpts       MAC commands buffer
+ * \param [IN] fPort       MAC payload port
+ * \param [IN] fBuffer     MAC data buffer to be sent
+ * \param [IN] fBufferSize MAC data buffer size
+ * \retval status          [0: OK, 1: Busy, 2: No network joined,
+ *                          3: Length or port error, 4: Unknown MAC command]
+ */
+uint8_t LoRaMacSendOnChannel( ChannelParams_t channel, LoRaMacHeader_t *macHdr, LoRaMacFrameCtrl_t *fCtrl, uint8_t *fOpts, uint8_t fPort, void *fBuffer, uint16_t fBufferSize );
+
+/*!
+ * ============================================================================
+ * = LoRaMac setup functions                                                  =
+ * ============================================================================
+ */
+
+/*
+ * TODO: Add documentation
+ */
+void LoRaMacSetDeviceClass( DeviceClass_t deviceClass );
+
+/*
+ * TODO: Add documentation
+ */
+void LoRaMacSetPublicNetwork( bool enable );
+
+/*
+ * TODO: Add documentation
+ */
+void LoRaMacSetChannel( uint8_t id, ChannelParams_t params );
+
+/*
+ * TODO: Add documentation
+ */
+void LoRaMacSetRx2Channel( Rx2ChannelParams_t param );
+
+/*!
+ * Sets channels tx output power
+ *
+ * \param [IN] txPower [TX_POWER_20_DBM, TX_POWER_14_DBM,
+                        TX_POWER_11_DBM, TX_POWER_08_DBM,
+                        TX_POWER_05_DBM, TX_POWER_02_DBM]
+ */
+void LoRaMacSetChannelsTxPower( int8_t txPower );
+
+/*!
+ * Sets channels datarate
+ *
+ * \param [IN] datarate eu868 - [DR_0, DR_1, DR_2, DR_3, DR_4, DR_5, DR_6, DR_7]
+ *                      us915 - [DR_0, DR_1, DR_2, DR_3, DR_4]
+ */
+void LoRaMacSetChannelsDatarate( int8_t datarate );
+
+/*
+ * TODO: Add documentation
+ */
+void LoRaMacSetChannelsMask( uint16_t *mask );
+
+/*
+ * TODO: Add documentation
+ */
+void LoRaMacSetChannelsNbRep( uint8_t nbRep );
+
+/*
+ * TODO: Add documentation
+ */
+void LoRaMacSetMaxRxWindow( uint32_t delay );
+
+/*
+ * TODO: Add documentation
+ */
+void LoRaMacSetReceiveDelay1( uint32_t delay );
+
+/*
+ * TODO: Add documentation
+ */
+void LoRaMacSetReceiveDelay2( uint32_t delay );
+
+/*
+ * TODO: Add documentation
+ */
+void LoRaMacSetJoinAcceptDelay1( uint32_t delay );
+
+/*
+ * TODO: Add documentation
+ */
+void LoRaMacSetJoinAcceptDelay2( uint32_t delay );
+
+/*
+ * TODO: Add documentation
+ */
+uint32_t LoRaMacGetUpLinkCounter( void );
+
+/*
+ * TODO: Add documentation
+ */
+uint32_t LoRaMacGetDownLinkCounter( void );
+
+/*
+ * ============================================================================
+ * = LoRaMac test functions                                                   =
+ * ============================================================================
+ */
+
+/*!
+ * Disables/Enables the duty cycle enforcement (EU868)
+ *
+ * \param   [IN] enable - Enabled or disables the duty cycle
+ */
+void LoRaMacTestSetDutyCycleOn( bool enable );
+
+/*!
+ * Disables/Enables the reception windows opening
+ *
+ * \param [IN] enable [true: enable, false: disable]
+ */
+void LoRaMacTestRxWindowsOn( bool enable );
+
+/*!
+ * Enables the MIC field test
+ *
+ * \param [IN] upLinkCounter Fixed Tx packet counter value
+ */
+void LoRaMacTestSetMic( uint16_t upLinkCounter );
+
+#endif // __LORAMAC_H__
\ No newline at end of file