ble_nus.h

 
#ifndef BLE_NUS_H__
#define BLE_NUS_H__
 
#include <stdint.h>
#include <stdbool.h>
#include <ble.h>
#include <bm/bluetooth/ble_common.h>
#include <bm/softdevice_handler/nrf_sdh_ble.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define BLE_NUS_UUID_BASE { 0x9E, 0xCA, 0xDC, 0x24, 0x0E, 0xE5, 0xA9, 0xE0,                        \
                            0x93, 0xF3, 0xA3, 0xB5, 0x00, 0x00, 0x40, 0x6E }
 
#define BLE_UUID_NUS_SERVICE 0x0001
#define BLE_UUID_NUS_RX_CHARACTERISTIC 0x0002
#define BLE_UUID_NUS_TX_CHARACTERISTIC 0x0003
 
#define BLE_NUS_DEF(_name)                                                                         \
        static struct ble_nus _name;                                                               \
        NRF_SDH_BLE_OBSERVER(_name##_obs, ble_nus_on_ble_evt, &_name, HIGH)
 
#define BLE_NUS_CONFIG_SEC_MODE_DEFAULT                                                            \
        {                                                                                          \
                .nus_rx_char = {                                                                   \
                        .read = BLE_GAP_CONN_SEC_MODE_OPEN,                                        \
                        .write = BLE_GAP_CONN_SEC_MODE_OPEN,                                       \
                },                                                                                 \
                .nus_tx_char = {                                                                   \
                        .read = BLE_GAP_CONN_SEC_MODE_OPEN,                                        \
                        .cccd_write = BLE_GAP_CONN_SEC_MODE_OPEN,                                  \
                },                                                                                 \
        }
 
#define BLE_NUS_MAX_DATA_LEN_CALC(mtu_size) ((mtu_size) - ATT_OPCODE_LEN - ATT_HANDLE_LEN)
 
#define BLE_NUS_MAX_DATA_LEN  BLE_NUS_MAX_DATA_LEN_CALC(CONFIG_NRF_SDH_BLE_GATT_MAX_MTU_SIZE)
 
enum ble_nus_evt_type {
        BLE_NUS_EVT_RX_DATA,
        BLE_NUS_EVT_TX_RDY,
        BLE_NUS_EVT_COMM_STARTED,
        BLE_NUS_EVT_COMM_STOPPED,
        BLE_NUS_EVT_ERROR,
};
 
struct ble_nus_evt {
        enum ble_nus_evt_type evt_type;
        uint16_t conn_handle;
        union {
                struct {
                        const uint8_t *data;
                        uint16_t length;
                } rx_data;
                struct {
                        uint32_t reason;
                } error;
        };
};
 
struct ble_nus;
 
typedef void (*ble_nus_evt_handler_t)(struct ble_nus *nus, const struct ble_nus_evt *evt);
 
struct ble_nus_config {
        ble_nus_evt_handler_t evt_handler;
        struct {
                struct {
                        ble_gap_conn_sec_mode_t read;
                        ble_gap_conn_sec_mode_t write;
                } nus_rx_char;
                struct {
                        ble_gap_conn_sec_mode_t read;
                        ble_gap_conn_sec_mode_t cccd_write;
                } nus_tx_char;
        } sec_mode;
};
 
struct ble_nus {
        uint8_t uuid_type;
        uint16_t service_handle;
        ble_gatts_char_handles_t tx_handles;
        ble_gatts_char_handles_t rx_handles;
        ble_nus_evt_handler_t evt_handler;
};
 
uint32_t ble_nus_init(struct ble_nus *nus, const struct ble_nus_config *nus_config);
 
void ble_nus_on_ble_evt(const ble_evt_t *ble_evt, void *ble_nus);
 
uint32_t ble_nus_data_send(struct ble_nus *nus, uint8_t *data, uint16_t *length,
                           uint16_t conn_handle);
 
#ifdef __cplusplus
}
#endif
 
#endif /* BLE_NUS_H__ */