[nrf51822][SDK12.3] 使用[静态/动态密码]进行配对

关键函数：sd_ble_opt_set

/**@brief GAP Option IDs.
 * 唯一标识GAP选项的id。
 */
enum BLE_GAP_OPTS
{
  BLE_GAP_OPT_CH_MAP  = BLE_GAP_OPT_BASE, /**< Channel Map. @ref ble_gap_opt_ch_map_t  */
  BLE_GAP_OPT_LOCAL_CONN_LATENCY, /**< Local connection latency. @ref ble_gap_opt_local_conn_latency_t */
  BLE_GAP_OPT_PASSKEY, /**< 设置配对密码. @ref ble_gap_opt_passkey_t */
  BLE_GAP_OPT_PRIVACY,  /**< Custom privacy. @ref ble_gap_opt_privacy_t */
  BLE_GAP_OPT_SCAN_REQ_REPORT, /**< Scan request report. @ref ble_gap_opt_scan_req_report_t */
  BLE_GAP_OPT_COMPAT_MODE  /**< Compatibility mode. @ref ble_gap_opt_compat_mode_t */
};

/**@brief Set a BLE option.
 *
 * @details 这个调用允许应用程序设置一个选项的值.
 *
 * @mscs
 * @mmsc{@ref BLE_GAP_PERIPH_BONDING_STATIC_PK_MSC}
 * @mmsc{@ref BLE_COMMON_CONF_BW}
 * @endmscs
 *
 * @param[in] opt_id Option ID, see @ref BLE_COMMON_OPTS and @ref BLE_GAP_OPTS.
 * @param[in] p_opt Pointer to a ble_opt_t structure containing the option value.
 *
 * @retval ::NRF_SUCCESS  Option set successfully.
 * @retval ::NRF_ERROR_INVALID_ADDR Invalid pointer supplied.
 * @retval ::BLE_ERROR_INVALID_CONN_HANDLE Invalid Connection Handle.
 * @retval ::NRF_ERROR_INVALID_PARAM Invalid parameter(s) supplied, check parameter limits and constraints.
 * @retval ::NRF_ERROR_INVALID_STATE [此时无法设置参数]
 * @retval ::NRF_ERROR_BUSY [BLE堆栈繁忙或前一个过程未完成]
 */
SVCALL(SD_BLE_OPT_SET, uint32_t, sd_ble_opt_set(uint32_t opt_id, ble_opt_t const *p_opt));

例程基础：

**nRF5_SDK_12.3.0_d7731ad\examples\ble_peripheral\ble_app_hids_mouse\pca10028\s130\arm5_no_packs

所需内容：

1. 所需文件(对等管理器，安全协议)
   

2. 配对参数如下：

#define SEC_PARAM_BOND             1 /**< Perform bonding. */
#define SEC_PARAM_MITM             1 /**< Man In The Middle protection not required. */
#define SEC_PARAM_LESC             0 /**< LE Secure Connections not enabled. */
#define SEC_PARAM_KEYPRESS         0 /**< Keypress notifications not enabled. */
#define SEC_PARAM_IO_CAPABILITIES  BLE_GAP_AUTH_KEY_TYPE_PASSKEY /**< 密码配对 */
#define SEC_PARAM_OOB              0 /**< Out Of Band data not available. */
#define SEC_PARAM_MIN_KEY_SIZE     7 /**< Minimum encryption key size. */
#define SEC_PARAM_MAX_KEY_SIZE     16 /**< Maximum encryption key size. */

3. 设置配对密码(在广播前设置advertising_start)

 //下面是添加设置配对密码
uint8_t passcode[]="123456";
ble_opt_t 	static_option;
static_option.gap_opt.passkey.p_passkey = passcode;
err_code =  sd_ble_opt_set(BLE_GAP_OPT_PASSKEY, &static_option);
APP_ERROR_CHECK(err_code);

4. 动态密码则每次随机生成（RNG自带），调用[sd_ble_opt_set]更新