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/*
/ _____) _ | |
( (____ _____ ____ _| |_ _____ ____| |__
\____ \| ___ | (_ _) ___ |/ ___) _ \
_____) ) ____| | | || |_| ____( (___| | | |
(______/|_____)_|_|_| \__)_____)\____)_| |_|
©2013 Semtech-Cycleo
Description:
Lora gateway Hardware Abstraction Layer
*/
#ifndef _LORAGW_HAL_H
#define _LORAGW_HAL_H
/* -------------------------------------------------------------------------- */
/* --- DEPENDANCIES --------------------------------------------------------- */
#include <stdint.h> /* C99 types */
#include <stdbool.h> /* bool type */
/* -------------------------------------------------------------------------- */
/* --- PUBLIC CONSTANTS ----------------------------------------------------- */
/* return status code */
#define LGW_HAL_SUCCESS 0
#define LGW_HAL_ERROR -1
/* hardware characteristics */
#define LGW_RF_CHAIN_NB 2 /* number of RF chains */
#define LGW_IF_CHAIN_NB 10 /* number of IF+modem RX chains */
#define LGW_MULTI_NB 4 /* number of Lora 'multi SF' chains */
#define LGW_PKT_FIFO_SIZE 8
#define LGW_DATABUFF_SIZE 1024
#define LGW_RF_BANDWIDTH 800000
/*
SX1275 frequency setting :
F_register(24bit) = F_rf (Hz) / F_step(Hz)
= F_rf (Hz) * 2^19 / F_xtal(Hz)
= F_rf (Hz) * 256/15625
*/
#define LGW_XTAL_FREQU 32000000
#define LGW_SW1257_DENUM 15625 /* pll settings denominator when the numerator is 2^8 */
/* to use those parameters, declare a local constant, and use 'rf_chain' as index */
#define LGW_RF_RX_LOWFREQ {863000000, 863000000}
#define LGW_RF_RX_UPFREQ {870000000, 870000000}
#define LGW_RF_TX_LOWFREQ {863000000, 863000000}
#define LGW_RF_TX_UPFREQ {870000000, 870000000}
/* type of if_chain + modem */
#define IF_UNDEFINED 0
#define IF_LORA_STD 0x10 /* if + standard single-SF Lora modem */
#define IF_LORA_MULTI 0x11 /* if + Lora receiver with multi-SF capability */
#define IF_FSK_STD 0x20 /* if + standard FSK modem */
/* configuration of available IF chains and modems on the hardware */
/* to use, declare a local constant, and use 'if_chain' as index */
#define LGW_IFMODEM_CONFIG {\
IF_LORA_MULTI, \
IF_LORA_MULTI, \
IF_LORA_MULTI, \
IF_LORA_MULTI, \
IF_UNDEFINED, \
IF_UNDEFINED, \
IF_UNDEFINED, \
IF_UNDEFINED, \
IF_LORA_STD, \
IF_FSK_STD }
/* values available for the 'modulation' parameters */
#define MOD_UNDEFINED 0
#define MOD_LORA 0x10
#define MOD_FSK 0x20
#define MOD_GFSK 0x21
/* values available for the 'bandwidth' parameters */
#define BW_UNDEFINED 0
#define BW_500KHZ 0x04
#define BW_250KHZ 0x08
#define BW_125KHZ 0x0C
// TODO: add all the supporter FSK bandwidth
/* values available for the 'datarate' parameters */
#define DR_UNDEFINED 0
#define DR_LORA_SF7 0x1002
#define DR_LORA_SF8 0x1004
#define DR_LORA_SF9 0x1008
#define DR_LORA_SF10 0x1010
#define DR_LORA_SF11 0x1020
#define DR_LORA_SF12 0x1040
#define DR_LORA_MULTI 0x107E
// TODO: add FSK datarates
/* values available for the 'coderate' parameters */
#define CR_UNDEFINED 0
#define CR_LORA_4_5 0x11
#define CR_LORA_4_6 0x12
#define CR_LORA_4_7 0x13
#define CR_LORA_4_8 0x14
/* values available for the 'status' parameter */
#define STAT_UNDEFINED 0x00
#define STAT_NO_CRC 0x01
#define STAT_CRC_BAD 0x11
#define STAT_CRC_OK 0x10
/* values available for the 'tx_mode' parameter */
#define IMMEDIATE 0
#define TIMESTAMPED 1
#define ON_GPS 2
//#define ON_EVENT 3
//#define GPS_DELAYED 4
//#define EVENT_DELAYED 5
/* -------------------------------------------------------------------------- */
/* --- PUBLIC TYPES --------------------------------------------------------- */
/**
@struct lgw_conf_rxrf_s
@brief Configuration structure for a RF chain
*/
struct lgw_conf_rxrf_s {
bool enable; /*!> enable or disable that RF chain */
uint32_t freq_hz; /*!> center frequency of the radio in Hz */
};
/**
@struct lgw_conf_rxif_s
@brief Configuration structure for an IF chain
*/
struct lgw_conf_rxif_s {
bool enable; /*!> enable or disable that IF chain */
uint8_t rf_chain; /*!> to which RF chain is that IF chain associated */
int32_t freq_hz; /*!> center frequ of the IF chain, relative to RF chain frequency */
uint8_t bandwidth; /*!> RX bandwidth, 0 for default */
uint16_t datarate; /*!> RX datarate, 0 for default */
};
/**
@struct lgw_pkt_rx_s
@brief Structure containing the metadata of a packet that was received and a pointer to the payload
*/
struct lgw_pkt_rx_s {
uint8_t if_chain; /*!> by which IF chain was packet received */
uint8_t status; /*!> status of the received packet */
uint8_t modulation; /*!> modulation used by the packet */
uint8_t bandwidth; /*!> modulation bandwidth (LORA only) */
uint16_t datarate; /*!> RX datarate of the packet */
uint8_t coderate; /*!> error-correcting code of the packet */
uint32_t count_us; /*!> internal gateway counter for timestamping, 1 microsecond resolution */
float rssi; /*!> average packet RSSI in dB */
float snr; /*!> average packet SNR, in dB (LORA only) */
float snr_min; /*!> minimum packet SNR, in dB (LORA only) */
float snr_max; /*!> maximum packet SNR, in dB (LORA only) */
uint16_t crc; /*!> CRC that was received in the payload */
uint16_t size; /*!> payload size in bytes */
uint8_t *payload; /*!> pointer to the payload */
};
/**
@struct lgw_pkt_tx_s
@brief Structure containing the configuration of a packet to send and a pointer to the payload
*/
struct lgw_pkt_tx_s {
uint32_t freq_hz; /*!> center frequency of TX */
uint8_t tx_mode; /*!> select on what event/time the TX is triggered */
uint32_t count_us; /*!> timestamp or delay in microseconds for TX trigger */
uint8_t rf_chain; /*!> through which RF chain will the packet be sent */
int8_t rf_power; /*!> TX power, in dBm */
uint8_t modulation; /*!> modulation to use for the packet */
uint8_t bandwidth; /*!> modulation bandwidth (LORA only) */
uint16_t f_dev; /*!> frequency deviation (FSK only) */
uint16_t datarate; /*!> TX datarate */
uint8_t coderate; /*!> error-correcting code of the packet */
uint16_t preamble; /*!> set the preamble length, 0 for default */
bool no_crc; /*!> if true, do not send a CRC in the packet */
bool no_header; /*!> if true, enable implicit header mode */
uint16_t size; /*!> payload size in bytes */
uint8_t *payload; /*!> pointer to the payload */
};
/* -------------------------------------------------------------------------- */
/* --- PUBLIC FUNCTIONS PROTOTYPES ------------------------------------------ */
/**
@brief Configure an RF chain (must configure before start)
@param rf_chain number of the RF chain to configure [0, LGW_RF_CHAIN_NB - 1]
@param conf structure containing the configuration parameters
@return LGW_HAL_ERROR id the operation failed, LGW_HAL_SUCCESS else
*/
int lgw_rxrf_setconf(uint8_t rf_chain, struct lgw_conf_rxrf_s conf);
/**
@brief Configure an IF chain + modem (must configure before start)
@param if_chain number of the IF chain + modem to configure [0, LGW_IF_CHAIN_NB - 1]
@param conf structure containing the configuration parameters
@return LGW_HAL_ERROR id the operation failed, LGW_HAL_SUCCESS else
*/
int lgw_rxif_setconf(uint8_t if_chain, struct lgw_conf_rxif_s conf);
/**
@brief Connect to the Lora gateway, reset it and configure it according to previously set parameters
@return LGW_HAL_ERROR id the operation failed, LGW_HAL_SUCCESS else
*/
int lgw_start(void);
/**
@brief Stop the Lora gateway and disconnect it
@return LGW_HAL_ERROR id the operation failed, LGW_HAL_SUCCESS else
*/
int lgw_stop(void);
/**
@brief A non-blocking function that will fetch up to 'max_pkt' packets from the Lora gateway FIFO and data buffer
@param max_pkt maximum number of packet that must be retrieved (equal to the size of the array of struct)
@param pkt_data pointer to an array of struct that will receive the packet metadata and payload pointers
@return LGW_HAL_ERROR id the operation failed, else the number of packets retrieved
*/
int lgw_receive(uint8_t max_pkt, struct lgw_pkt_rx_s *pkt_data);
/**
@brief Schedule a packet to be send immediately or after a delay depending on tx_mode
@param pkt_data structure containing the data and metadata for the packet to send
@return LGW_HAL_ERROR id the operation failed, LGW_HAL_SUCCESS else
*/
int lgw_send(struct lgw_pkt_tx_s pkt_data);
#endif
/* --- EOF ------------------------------------------------------------------ */
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