a752c7ab
 elopes
add first test an...
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/*
* Copyright (C) 2016 Unwired Devices <info@unwds.com>
* 2017 Inria
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @defgroup drivers_sx127x Semtech SX1272 and SX1276 radios driver
* @ingroup drivers_netdev
* @brief Driver for Semtech SX1272 and SX1276 radios.
*
* This module contains the driver for radio devices of the Semtech SX127x
* series (SX1272 and SX1276).
* Only LoRa long range modem is supported at the moment.
*
* SX127x modules are designed to be used in the ISM radio frequency (RF) band.
* This RF band depends on different regional regulations worldwide.
* Be careful to configure the device to use a RF frequency allowed in your
* region.
* Here is the list of allowed frequencies for your region (see
* [LoRaWAN regional parameters document available online]
* (https://www.lora-alliance.org/for-developers)):
* - Europe has 2 allowed bands (ETSI):
* - EU863-870
* - EU433 (from 433.175MHZ to 434.665MHZ exactly)
* - US is US902-928
* - China has 2 allowed bands:
* - CN779-787 (from 779.5MHz to 786.5MHz exactly)
* - CN470-510 (from 470.3MHz to 509.7MHz exactly)
* - Australia is AU915-928
* - South asia, AS923:
* - Bruneï [923-925 MHz]
* - Cambodia [923-925 MHz]
* - Hong Kong [920-925 MHz]
* - Indonesia [923-925 MHz]
* - Japan [920-928 MHz]
* - Laos [923-925 MHz]
* - New Zealand [915-928 MHz]
* - Singapore [920-925 MHz]
* - Taiwan [922-928 MHz]
* - Thailand [920-925 MHz]
* - Vietnam [920-925 MHz]
* - South Korea: KR920-923 (from 920.9MHz to 923.3MHz exactly)
*
* For more information on Semtech SX1272 and SX1276 modules see:
* - [SX1272/73 datasheet](http://www.semtech.com/images/datasheet/sx1272.pdf)
* - [SX1276/77/78/79 datasheet](http://www.semtech.com/images/datasheet/sx1276_77_78_79.pdf)
*
* @{
*
* @file
* @brief Public interface for SX127X driver
* @author Eugene P. <ep@unwds.com>
* @author Alexandre Abadie <alexandre.abadie@inria.fr>
*/
#ifndef SX127X_H
#define SX127X_H
#include "xtimer.h"
#include "net/netdev.h"
#include "periph/gpio.h"
#include "periph/spi.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @name SX127X device default configuration
* @{
*/
#define SX127X_MODEM_DEFAULT (SX127X_MODEM_LORA) /**< Use LoRa as default modem */
#define SX127X_CHANNEL_DEFAULT (868300000UL) /**< Default channel frequency, 868.3MHz (Europe) */
#define SX127X_HF_CHANNEL_DEFAULT (868000000UL) /**< Use to calibrate RX chain for LF and HF bands */
#define SX127X_RF_MID_BAND_THRESH (525000000UL) /**< Mid-band threshold */
#define SX127X_FREQUENCY_RESOLUTION (61.03515625) /**< Frequency resolution in Hz */
#define SX127X_XTAL_FREQ (32000000UL) /**< Internal oscillator frequency, 32MHz */
#define SX127X_RADIO_WAKEUP_TIME (1000U) /**< In microseconds [us] */
#define SX127X_PREAMBLE_LENGTH (8U) /**< Preamble length, same for Tx and Rx */
#define SX127X_SYMBOL_TIMEOUT (10U) /**< Symbols timeout (s) */
#define SX127X_BW_DEFAULT (SX127X_BW_125_KHZ) /**< Set default bandwidth to 125kHz */
#define SX127X_SF_DEFAULT (SX127X_SF12) /**< Set default spreading factor to 12 */
#define SX127X_CR_DEFAULT (SX127X_CR_4_8) /**< Set default coding rate to 8 */
#define SX127X_FIX_LENGTH_PAYLOAD_ON (false) /**< Set fixed payload length on */
#define SX127X_IQ_INVERSION (false) /**< Set inverted IQ on */
#define SX127X_FREQUENCY_HOPPING (false) /**< Frequency hopping on */
#define SX127X_FREQUENCY_HOPPING_PERIOD (0U) /**< Frequency hopping period */
#define SX127X_FIXED_HEADER_LEN_MODE (false) /**< Set fixed header length mode (implicit header) */
#define SX127X_PAYLOAD_CRC_ON (true) /**< Enable payload CRC, optional */
#define SX127X_PAYLOAD_LENGTH (0U) /**< Set payload length, unused with implicit header */
#define SX127X_TX_TIMEOUT_DEFAULT (1000U * 1000U * 30UL) /**< TX timeout, 30s */
#define SX127X_RX_SINGLE (false) /**< Single byte receive mode => continuous by default */
#define SX127X_RX_BUFFER_SIZE (256) /**< RX buffer size */
#define SX127X_RADIO_TX_POWER (14U) /**< Radio power in dBm */
#ifndef SX1272_DEFAULT_PASELECT
/** @brief Default PA selection config (1: RFO, 0: PABOOST)
*
* This depends on the module configuration.
*/
#define SX1272_DEFAULT_PASELECT (1U)
#endif
#define SX127X_EVENT_HANDLER_STACK_SIZE (2048U) /**< Stack size event handler */
#define SX127X_IRQ_DIO0 (1<<0) /**< DIO0 IRQ */
#define SX127X_IRQ_DIO1 (1<<1) /**< DIO1 IRQ */
#define SX127X_IRQ_DIO2 (1<<2) /**< DIO2 IRQ */
#define SX127X_IRQ_DIO3 (1<<3) /**< DIO3 IRQ */
#define SX127X_IRQ_DIO4 (1<<4) /**< DIO4 IRQ */
#define SX127X_IRQ_DIO5 (1<<5) /**< DIO5 IRQ */
/** @} */
/**
* @brief SX127X initialization result.
*/
enum {
SX127X_INIT_OK = 0, /**< Initialization was successful */
SX127X_ERR_SPI, /**< Failed to initialize SPI bus or CS line */
SX127X_ERR_TEST_FAILED, /**< SX127X testing failed during initialization (check chip) */
SX127X_ERR_THREAD /**< Unable to create DIO handling thread (check amount of free memory) */
};
/**
* @brief Radio driver supported modems.
*/
enum {
SX127X_MODEM_FSK = 0, /**< FSK modem driver */
SX127X_MODEM_LORA, /**< LoRa modem driver */
};
/**
* @brief LoRa signal bandwidth.
*/
enum {
SX127X_BW_125_KHZ = 0, /**< 125 kHz bandwidth */
SX127X_BW_250_KHZ, /**< 250 kHz bandwidth */
SX127X_BW_500_KHZ /**< 500 kHz bandwidth */
};
/**
* @brief LoRa spreading factor rate
*/
enum {
SX127X_SF6 = 6, /**< spreading factor 6 */
SX127X_SF7, /**< spreading factor 7 */
SX127X_SF8, /**< spreading factor 8 */
SX127X_SF9, /**< spreading factor 9 */
SX127X_SF10, /**< spreading factor 10 */
SX127X_SF11, /**< spreading factor 11 */
SX127X_SF12 /**< spreading factor 12 */
};
/**
* @brief LoRa error coding rate.
*/
enum {
SX127X_CR_4_5 = 1, /**< coding rate 4/5 */
SX127X_CR_4_6, /**< coding rate 4/6 */
SX127X_CR_4_7, /**< coding rate 4/7 */
SX127X_CR_4_8 /**< coding rate 4/8 */
};
/**
* @brief Radio driver internal state machine states definition.
*/
enum {
SX127X_RF_IDLE = 0, /**< Idle state */
SX127X_RF_RX_RUNNING, /**< Sending state */
SX127X_RF_TX_RUNNING, /**< Receiving state */
SX127X_RF_CAD, /**< Channel activity detection state */
};
/**
* @brief Event types.
*/
enum {
SX127X_RX_DONE = 0, /**< Receiving complete */
SX127X_TX_DONE, /**< Sending complete*/
SX127X_RX_TIMEOUT, /**< Receiving timeout */
SX127X_TX_TIMEOUT, /**< Sending timeout */
SX127X_RX_ERROR_CRC, /**< Receiving CRC error */
SX127X_FHSS_CHANGE_CHANNEL, /**< Channel change */
SX127X_CAD_DONE, /**< Channel activity detection complete */
};
/**
* @name SX127X device descriptor boolean flags
* @{
*/
#define SX127X_LOW_DATARATE_OPTIMIZE_FLAG (1 << 0)
#define SX127X_ENABLE_FIXED_HEADER_LENGTH_FLAG (1 << 1)
#define SX127X_ENABLE_CRC_FLAG (1 << 2)
#define SX127X_CHANNEL_HOPPING_FLAG (1 << 3)
#define SX127X_IQ_INVERTED_FLAG (1 << 4)
#define SX127X_RX_CONTINUOUS_FLAG (1 << 5)
/** @} */
/**
* @brief LoRa configuration structure.
*/
typedef struct {
uint16_t preamble_len; /**< Length of preamble header */
uint8_t power; /**< Signal power */
uint8_t bandwidth; /**< Signal bandwidth */
uint8_t datarate; /**< Spreading factor rate, e.g datarate */
uint8_t coderate; /**< Error coding rate */
uint8_t freq_hop_period; /**< Frequency hop period */
uint8_t flags; /**< Boolean flags */
uint32_t rx_timeout; /**< RX timeout in symbols */
uint32_t tx_timeout; /**< TX timeout in symbols */
} sx127x_lora_settings_t;
/**
* @brief Radio settings.
*/
typedef struct {
uint32_t channel; /**< Radio channel */
uint32_t window_timeout; /**< Timeout window */
uint8_t state; /**< Radio state */
uint8_t modem; /**< Driver model (FSK or LoRa) */
sx127x_lora_settings_t lora; /**< LoRa settings */
} sx127x_radio_settings_t;
/**
* @brief SX127X internal data.
*/
typedef struct {
/* Data that will be passed to events handler in application */
xtimer_t tx_timeout_timer; /**< TX operation timeout timer */
xtimer_t rx_timeout_timer; /**< RX operation timeout timer */
uint32_t last_channel; /**< Last channel in frequency hopping sequence */
bool is_last_cad_success; /**< Sign of success of last CAD operation (activity detected) */
} sx127x_internal_t;
/**
* @brief SX127X hardware and global parameters.
*/
typedef struct {
spi_t spi; /**< SPI device */
gpio_t nss_pin; /**< SPI NSS pin */
gpio_t reset_pin; /**< Reset pin */
gpio_t dio0_pin; /**< Interrupt line DIO0 (Tx done) */
gpio_t dio1_pin; /**< Interrupt line DIO1 (Rx timeout) */
gpio_t dio2_pin; /**< Interrupt line DIO2 (FHSS channel change) */
gpio_t dio3_pin; /**< Interrupt line DIO3 (CAD done) */
gpio_t dio4_pin; /**< Interrupt line DIO4 (not used) */
gpio_t dio5_pin; /**< Interrupt line DIO5 (not used) */
} sx127x_params_t;
/**
* @brief SX127X IRQ flags.
*/
typedef uint8_t sx127x_flags_t;
/**
* @brief SX127X device descriptor.
* @extends netdev_t
*/
typedef struct {
netdev_t netdev; /**< Netdev parent struct */
sx127x_radio_settings_t settings; /**< Radio settings */
sx127x_params_t params; /**< Device driver parameters */
sx127x_internal_t _internal; /**< Internal sx127x data used within the driver */
sx127x_flags_t irq; /**< Device IRQ flags */
} sx127x_t;
/**
* @brief Hardware IO IRQ callback function definition.
*/
typedef void (sx127x_dio_irq_handler_t)(sx127x_t *dev);
/**
* @brief Setup the SX127X
*
* @param[in] dev Device descriptor
* @param[in] params Parameters for device initialization
*/
void sx127x_setup(sx127x_t *dev, const sx127x_params_t *params);
/**
* @brief Resets the SX127X
*
* @param[in] dev The sx127x device descriptor
*/
void sx127x_reset(const sx127x_t *dev);
/**
* @brief Initializes the transceiver.
*
* @param[in] dev The sx127x device descriptor
*
* @return result of initialization
*/
int sx127x_init(sx127x_t *dev);
/**
* @brief Initialize radio settings with default values
*
* @param[in] dev The sx127x device pointer
*/
void sx127x_init_radio_settings(sx127x_t *dev);
/**
* @brief Generates 32 bits random value based on the RSSI readings
*
* @attention This function sets the radio in LoRa mode and disables all
* interrupts from it. After calling this function either
* sx127x_set_rx_config or sx127x_set_tx_config functions must
* be called.
*
* @param[in] dev The sx127x device structure pointer
*
* @return random 32 bits value
*/
uint32_t sx127x_random(sx127x_t *dev);
/**
* @brief Start a channel activity detection.
*
* @param[in] dev The sx127x device descriptor
*/
void sx127x_start_cad(sx127x_t *dev);
/**
* @brief Gets current state of transceiver.
*
* @param[in] dev The sx127x device descriptor
*
* @return radio state [RF_IDLE, RF_RX_RUNNING, RF_TX_RUNNING]
*/
uint8_t sx127x_get_state(const sx127x_t *dev);
/**
* @brief Sets current state of transceiver.
*
* @param[in] dev The sx127x device descriptor
* @param[in] state The new radio state
*
* @return radio state [RF_IDLE, RF_RX_RUNNING, RF_TX_RUNNING]
*/
void sx127x_set_state(sx127x_t *dev, uint8_t state);
/**
* @brief Configures the radio with the given modem.
*
* @param[in] dev The sx127x device descriptor
* @param[in] modem Modem to be used [0: FSK, 1: LoRa]
*/
void sx127x_set_modem(sx127x_t *dev, uint8_t modem);
/**
* @brief Gets the synchronization word.
*
* @param[in] dev The sx127x device descriptor
*
* @return The synchronization word
*/
uint8_t sx127x_get_syncword(const sx127x_t *dev);
/**
* @brief Sets the synchronization word.
*
* @param[in] dev The sx127x device descriptor
* @param[in] syncword The synchronization word
*/
void sx127x_set_syncword(sx127x_t *dev, uint8_t syncword);
/**
* @brief Gets the channel RF frequency.
*
* @param[in] dev The sx127x device descriptor
*
* @return The channel frequency
*/
uint32_t sx127x_get_channel(const sx127x_t *dev);
/**
* @brief Sets the channel RF frequency.
*
* @param[in] dev The sx127x device descriptor
* @param[in] freq Channel RF frequency
*/
void sx127x_set_channel(sx127x_t *dev, uint32_t freq);
/**
* @brief Computes the packet time on air in milliseconds.
*
* @pre Can only be called if sx127x_init_radio_settings has already
* been called.
*
* @param[in] dev The sx127x device descriptor
* @param[in] pkt_len The received packet payload length
*
* @return computed air time (ms) for the given packet payload length
*/
uint32_t sx127x_get_time_on_air(const sx127x_t *dev, uint8_t pkt_len);
/**
* @brief Sets the radio in sleep mode
*
* @param[in] dev The sx127x device descriptor
*/
void sx127x_set_sleep(sx127x_t *dev);
/**
* @brief Sets the radio in stand-by mode
*
* @param[in] dev The sx127x device descriptor
*/
void sx127x_set_standby(sx127x_t *dev);
/**
* @brief Sets the radio in reception mode.
*
* @param[in] dev The sx127x device descriptor
*/
void sx127x_set_rx(sx127x_t *dev);
/**
* @brief Sets the radio in transmission mode.
*
* @param[in] dev The sx127x device descriptor
*/
void sx127x_set_tx(sx127x_t *dev);
/**
* @brief Gets the maximum payload length.
*
* @param[in] dev The sx127x device descriptor
*
* @return The maximum payload length
*/
uint8_t sx127x_get_max_payload_len(const sx127x_t *dev);
/**
* @brief Sets the maximum payload length.
*
* @param[in] dev The sx127x device descriptor
* @param[in] maxlen Maximum payload length in bytes
*/
void sx127x_set_max_payload_len(const sx127x_t *dev, uint8_t maxlen);
/**
* @brief Gets the SX127X operating mode
*
* @param[in] dev The sx127x device descriptor
*
* @return The actual operating mode
*/
uint8_t sx127x_get_op_mode(const sx127x_t *dev);
/**
* @brief Sets the SX127X operating mode
*
* @param[in] dev The sx127x device descriptor
* @param[in] op_mode The new operating mode
*/
void sx127x_set_op_mode(const sx127x_t *dev, uint8_t op_mode);
/**
* @brief Gets the SX127X bandwidth
*
* @param[in] dev The sx127x device descriptor
*
* @return the bandwidth
*/
uint8_t sx127x_get_bandwidth(const sx127x_t *dev);
/**
* @brief Sets the SX127X bandwidth
*
* @param[in] dev The sx127x device descriptor
* @param[in] bandwidth The new bandwidth
*/
void sx127x_set_bandwidth(sx127x_t *dev, uint8_t bandwidth);
/**
* @brief Gets the SX127X LoRa spreading factor
*
* @param[in] dev The sx127x device descriptor
*
* @return the spreading factor
*/
uint8_t sx127x_get_spreading_factor(const sx127x_t *dev);
/**
* @brief Sets the SX127X LoRa spreading factor
*
* @param[in] dev The sx127x device descriptor
* @param[in] sf The spreading factor
*/
void sx127x_set_spreading_factor(sx127x_t *dev, uint8_t sf);
/**
* @brief Gets the SX127X LoRa coding rate
*
* @param[in] dev The sx127x device descriptor
*
* @return the current LoRa coding rate
*/
uint8_t sx127x_get_coding_rate(const sx127x_t *dev);
/**
* @brief Sets the SX127X LoRa coding rate
*
* @param[in] dev The sx127x device descriptor
* @param[in] coderate The LoRa coding rate
*/
void sx127x_set_coding_rate(sx127x_t *dev, uint8_t coderate);
/**
* @brief Checks if the SX127X LoRa RX single mode is enabled/disabled
*
* @param[in] dev The sx127x device descriptor
*
* @return the LoRa single mode
*/
bool sx127x_get_rx_single(const sx127x_t *dev);
/**
* @brief Enable/disable the SX127X LoRa RX single mode
*
* @param[in] dev The sx127x device descriptor
* @param[in] single The LoRa RX single mode
*/
void sx127x_set_rx_single(sx127x_t *dev, bool single);
/**
* @brief Checks if the SX127X CRC verification mode is enabled
*
* @param[in] dev The sx127x device descriptor
*
* @return the LoRa single mode
*/
bool sx127x_get_crc(const sx127x_t *dev);
/**
* @brief Enable/Disable the SX127X CRC verification mode
*
* @param[in] dev The sx127x device descriptor
* @param[in] crc The CRC check mode
*/
void sx127x_set_crc(sx127x_t *dev, bool crc);
/**
* @brief Gets the SX127X frequency hopping period
*
* @param[in] dev The sx127x device descriptor
*
* @return the frequency hopping period
*/
uint8_t sx127x_get_hop_period(const sx127x_t *dev);
/**
* @brief Sets the SX127X frequency hopping period
*
* @param[in] dev The sx127x device descriptor
* @param[in] hop_period The frequency hopping period
*/
void sx127x_set_hop_period(sx127x_t *dev, uint8_t hop_period);
/**
* @brief Gets the SX127X LoRa fixed header length mode
*
* @param[in] dev The sx127x device descriptor
*
* @return the LoRa implicit mode
*/
bool sx127x_get_fixed_header_len_mode(const sx127x_t *dev);
/**
* @brief Sets the SX127X to fixed header length mode (explicit mode)
*
* @param[in] dev The sx127x device descriptor
* @param[in] mode The header mode
*/
void sx127x_set_fixed_header_len_mode(sx127x_t *dev, bool mode);
/**
* @brief Gets the SX127X payload length
*
* @param[in] dev The sx127x device descriptor
*
* @return the payload length
*/
uint8_t sx127x_get_payload_length(const sx127x_t *dev);
/**
* @brief Sets the SX127X payload length
*
* @param[in] dev The sx127x device descriptor
* @param[in] len The payload len
*/
void sx127x_set_payload_length(sx127x_t *dev, uint8_t len);
/**
* @brief Gets the SX127X TX radio power
*
* @param[in] dev The sx127x device descriptor
*
* @return the radio power
*/
uint8_t sx127x_get_tx_power(const sx127x_t *dev);
/**
* @brief Sets the SX127X transmission power
*
* @param[in] dev The sx127x device descriptor
* @param[in] power The TX power
*/
void sx127x_set_tx_power(sx127x_t *dev, uint8_t power);
/**
* @brief Gets the SX127X preamble length
*
* @param[in] dev The sx127x device descriptor
*
* @return the preamble length
*/
uint16_t sx127x_get_preamble_length(const sx127x_t *dev);
/**
* @brief Sets the SX127X LoRa preamble length
*
* @param[in] dev The sx127x device descriptor
* @param[in] preamble The LoRa preamble length
*/
void sx127x_set_preamble_length(sx127x_t *dev, uint16_t preamble);
/**
* @brief Sets the SX127X LoRa symbol timeout
*
* @param[in] dev The sx127x device descriptor
* @param[in] timeout The LoRa symbol timeout
*/
void sx127x_set_symbol_timeout(sx127x_t *dev, uint16_t timeout);
/**
* @brief Sets the SX127X RX timeout
*
* @param[in] dev The sx127x device descriptor
* @param[in] timeout The RX timeout
*/
void sx127x_set_rx_timeout(sx127x_t *dev, uint32_t timeout);
/**
* @brief Sets the SX127X TX timeout
*
* @param[in] dev The sx127x device descriptor
* @param[in] timeout The TX timeout
*/
void sx127x_set_tx_timeout(sx127x_t *dev, uint32_t timeout);
/**
* @brief Sets the SX127X LoRa IQ inverted mode
*
* @param[in] dev The sx127x device descriptor
* @param[in] iq_invert The LoRa IQ inverted mode
*/
void sx127x_set_iq_invert(sx127x_t *dev, bool iq_invert);
/**
* @brief Sets the SX127X LoRa frequency hopping mode
*
* @param[in] dev The sx127x device descriptor
* @param[in] freq_hop_on The LoRa frequency hopping mode
*/
void sx127x_set_freq_hop(sx127x_t *dev, bool freq_hop_on);
#ifdef __cplusplus
}
#endif
#endif /* SX127X_H */
/** @} */
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