lora.h

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/*
 * Copyright (c) 2019 Manivannan Sadhasivam
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_DRIVERS_LORA_H_
#define ZEPHYR_INCLUDE_DRIVERS_LORA_H_
 
#include <stdint.h>
#include <zephyr/kernel.h>
#include <zephyr/device.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
enum lora_signal_bandwidth {
        BW_125_KHZ = 0,
        BW_250_KHZ,
        BW_500_KHZ,
};
 
enum lora_datarate {
        SF_6 = 6,
        SF_7,
        SF_8,
        SF_9,
        SF_10,
        SF_11,
        SF_12,
};
 
enum lora_coding_rate {
        CR_4_5 = 1,
        CR_4_6 = 2,
        CR_4_7 = 3,
        CR_4_8 = 4,
};
 
struct lora_modem_config {
        /* Frequency in Hz to use for transceiving */
        uint32_t frequency;
 
        /* The bandwidth to use for transceiving */
        enum lora_signal_bandwidth bandwidth;
 
        /* The data-rate to use for transceiving */
        enum lora_datarate datarate;
 
        /* The coding rate to use for transceiving */
        enum lora_coding_rate coding_rate;
 
        /* Length of the preamble */
        uint16_t preamble_len;
 
        /* TX-power in dBm to use for transmission */
        int8_t tx_power;
 
        /* Set to true for transmission, false for receiving */
        bool tx;
 
        bool iq_inverted;
 
        bool public_network;
};
 
typedef void (*lora_recv_cb)(const struct device *dev, uint8_t *data, uint16_t size,
                             int16_t rssi, int8_t snr);
 
typedef int (*lora_api_config)(const struct device *dev,
                               struct lora_modem_config *config);
 
typedef int (*lora_api_send)(const struct device *dev,
                             uint8_t *data, uint32_t data_len);
 
typedef int (*lora_api_send_async)(const struct device *dev,
                                   uint8_t *data, uint32_t data_len,
                                   struct k_poll_signal *async);
 
typedef int (*lora_api_recv)(const struct device *dev, uint8_t *data,
                             uint8_t size,
                             k_timeout_t timeout, int16_t *rssi, int8_t *snr);
 
typedef int (*lora_api_recv_async)(const struct device *dev, lora_recv_cb cb);
 
typedef int (*lora_api_test_cw)(const struct device *dev, uint32_t frequency,
                                int8_t tx_power, uint16_t duration);
 
struct lora_driver_api {
        lora_api_config config;
        lora_api_send send;
        lora_api_send_async send_async;
        lora_api_recv recv;
        lora_api_recv_async recv_async;
        lora_api_test_cw test_cw;
};
 
static inline int lora_config(const struct device *dev,
                              struct lora_modem_config *config)
{
        const struct lora_driver_api *api =
                (const struct lora_driver_api *)dev->api;
 
        return api->config(dev, config);
}
 
static inline int lora_send(const struct device *dev,
                            uint8_t *data, uint32_t data_len)
{
        const struct lora_driver_api *api =
                (const struct lora_driver_api *)dev->api;
 
        return api->send(dev, data, data_len);
}
 
static inline int lora_send_async(const struct device *dev,
                                  uint8_t *data, uint32_t data_len,
                                  struct k_poll_signal *async)
{
        const struct lora_driver_api *api =
                (const struct lora_driver_api *)dev->api;
 
        return api->send_async(dev, data, data_len, async);
}
 
static inline int lora_recv(const struct device *dev, uint8_t *data,
                            uint8_t size,
                            k_timeout_t timeout, int16_t *rssi, int8_t *snr)
{
        const struct lora_driver_api *api =
                (const struct lora_driver_api *)dev->api;
 
        return api->recv(dev, data, size, timeout, rssi, snr);
}
 
static inline int lora_recv_async(const struct device *dev, lora_recv_cb cb)
{
        const struct lora_driver_api *api =
                (const struct lora_driver_api *)dev->api;
 
        return api->recv_async(dev, cb);
}
 
static inline int lora_test_cw(const struct device *dev, uint32_t frequency,
                               int8_t tx_power, uint16_t duration)
{
        const struct lora_driver_api *api =
                (const struct lora_driver_api *)dev->api;
 
        if (api->test_cw == NULL) {
                return -ENOSYS;
        }
 
        return api->test_cw(dev, frequency, tx_power, duration);
}
 
#ifdef __cplusplus
}
#endif
 
#endif  /* ZEPHYR_INCLUDE_DRIVERS_LORA_H_ */