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标题: 如何在公有服务里添加自定义的特征？ [打印本页]

作者: luobotia 时间: 2018-5-30 10:54
标题: 如何在公有服务里添加自定义的特征？
官方例程：nRF5_SDK_12.2.0_f012efa\examples\ble_peripheral\ble_app_proximity
下面是我修改的地方：
1. 添加特征
static uint32_t alert_duration_char_add(ble_lls_t * p_lls, const ble_lls_init_t * p_lls_init)
{
ble_gatts_char_md_t char_md;
ble_gatts_attr_t attr_char_value;
ble_uuid_t       ble_uuid;
ble_gatts_attr_md_t attr_md;
uint8_t          initial_alert_duration;

memset(&char_md, 0, sizeof(char_md));

char_md.char_props.read  = 1;
char_md.char_props.write = 1;
char_md.p_char_user_desc = NULL;
char_md.p_char_pf       = NULL;
char_md.p_user_desc_md = NULL;
char_md.p_cccd_md       = NULL;
char_md.p_sccd_md       = NULL;

BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_ALERT_DURATION_CHAR);
memset(&attr_md, 0, sizeof(attr_md));

attr_md.read_perm  = p_lls_init->lls_attr_md.read_perm;
attr_md.write_perm = p_lls_init->lls_attr_md.write_perm;
attr_md.vloc    = BLE_GATTS_VLOC_STACK;
attr_md.rd_auth = 0;
attr_md.wr_auth = 0;
attr_md.vlen    = 0;

memset(&attr_char_value, 0, sizeof(attr_char_value));
    initial_alert_duration = p_lls_init->initial_alert_duration;

attr_char_value.p_uuid = &ble_uuid;
attr_char_value.p_attr_md = &attr_md;
attr_char_value.init_len  =  sizeof (uint8_t);
attr_char_value.init_offs = 0;
attr_char_value.max_len =  sizeof (uint8_t);
attr_char_value.p_value = &initial_alert_duration;

return sd_ble_gatts_characteristic_add(p_lls->service_handle,
                                       &char_md,
                                       &attr_char_value,
                                       &p_lls->alert_duration_handles);
}
2. 初始化服务
uint32_t ble_lls_init(ble_lls_t * p_lls, const ble_lls_init_t * p_lls_init)
{
uint32_t err_code;
ble_uuid_t ble_uuid;

// Initialize service structure
if (p_lls_init->evt_handler == NULL)
{
      return NRF_ERROR_INVALID_PARAM;
}

p_lls->evt_handler = p_lls_init->evt_handler;
p_lls->error_handler = p_lls_init->error_handler;

// Add service
BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_LINK_LOSS_SERVICE);

err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY,
                                    &ble_uuid,
                                    &p_lls->service_handle);

if (err_code != NRF_SUCCESS)
{
      return err_code;
}

// Add alert level characteristic
err_code = alert_level_char_add(p_lls, p_lls_init);
VERIFY_SUCCESS(err_code);

// Add alert duration characteristic
err_code = alert_duration_char_add(p_lls, p_lls_init);
VERIFY_SUCCESS(err_code);

return NRF_SUCCESS;
}

3. 定义UUID:
#define BLE_UUID_ALERT_DURATION_CHAR                            0x5A11
以上是我的修改配置。打开手机APP却看不到增加的特征，这是为什么呢？？求指教

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