ble_conn_params.h

00001 /*
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00032 
00033 /** @file
00034  *
00035  * @defgroup ble_sdk_lib_conn_params Connection Parameters Negotiation
00036  * @{
00037  * @ingroup ble_sdk_lib
00038  * @brief Module for initiating and executing a connection parameters negotiation procedure.
00039  */
00040 
00041 #ifndef BLE_CONN_PARAMS_H__
00042 #define BLE_CONN_PARAMS_H__
00043 
00044 #include <stdint.h>
00045 #include "nrf_ble.h"
00046 #include "ble_srv_common.h "
00047 
00048 /**@brief Connection Parameters Module event type. */
00049 typedef enum
00050 {
00051     BLE_CONN_PARAMS_EVT_FAILED   ,                                  /**< Negotiation procedure failed. */
00052     BLE_CONN_PARAMS_EVT_SUCCEEDED                                   /**< Negotiation procedure succeeded. */
00053 } ble_conn_params_evt_type_t;
00054 
00055 /**@brief Connection Parameters Module event. */
00056 typedef struct
00057 {
00058     ble_conn_params_evt_type_t evt_type;                            /**< Type of event. */
00059 } ble_conn_params_evt_t;
00060 
00061 /**@brief Connection Parameters Module event handler type. */
00062 typedef void (*ble_conn_params_evt_handler_t) (ble_conn_params_evt_t * p_evt);
00063 
00064 /**@brief Connection Parameters Module init structure. This contains all options and data needed for
00065  *        initialization of the connection parameters negotiation module. */
00066 typedef struct
00067 {
00068     ble_gap_conn_params_t *       p_conn_params;                    /**< Pointer to the connection parameters desired by the application. When calling ble_conn_params_init, if this parameter is set to NULL, the connection parameters will be fetched from host. */
00069     uint32_t                      first_conn_params_update_delay;   /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (in number of timer ticks). */
00070     uint32_t                      next_conn_params_update_delay;    /**< Time between each call to sd_ble_gap_conn_param_update after the first (in number of timer ticks). Recommended value 30 seconds as per BLUETOOTH SPECIFICATION Version 4.0. */
00071     uint8_t                       max_conn_params_update_count;     /**< Number of attempts before giving up the negotiation. */
00072     uint16_t                      start_on_notify_cccd_handle;      /**< If procedure is to be started when notification is started, set this to the handle of the corresponding CCCD. Set to BLE_GATT_HANDLE_INVALID if procedure is to be started on connect event. */
00073     bool                          disconnect_on_fail;               /**< Set to TRUE if a failed connection parameters update shall cause an automatic disconnection, set to FALSE otherwise. */
00074     ble_conn_params_evt_handler_t evt_handler;                      /**< Event handler to be called for handling events in the Connection Parameters. */
00075     ble_srv_error_handler_t       error_handler;                    /**< Function to be called in case of an error. */
00076 } ble_conn_params_init_t;
00077 
00078 
00079 /**@brief Function for initializing the Connection Parameters module.
00080  *
00081  * @note If the negotiation procedure should be triggered when notification/indication of 
00082  *       any characteristic is enabled by the peer, then this function must be called after
00083  *       having initialized the services.
00084  *
00085  * @param[in]   p_init  This contains information needed to initialize this module.
00086  *
00087  * @return      NRF_SUCCESS on successful initialization, otherwise an error code.
00088  */
00089 uint32_t ble_conn_params_init(const ble_conn_params_init_t * p_init);
00090 
00091 /**@brief Function for stopping the Connection Parameters module.
00092  *
00093  * @details This function is intended to be used by the application to clean up the connection
00094  *          parameters update module. This will stop the connection parameters update timer if
00095  *          running, thereby preventing any impending connection parameters update procedure. This
00096  *          function must be called by the application when it needs to clean itself up (for
00097  *          example, before disabling the bluetooth SoftDevice) so that an unwanted timer expiry
00098  *          event can be avoided.
00099  *
00100  * @return      NRF_SUCCESS on successful initialization, otherwise an error code.
00101  */
00102 uint32_t ble_conn_params_stop(void);
00103 
00104 /**@brief Function for changing the current connection parameters to a new set.
00105  *
00106  *  @details Use this function to change the connection parameters to a new set of parameter 
00107  *       (ie different from the ones given at init of the module).
00108  *       This function is usefull for scenario where most of the time the application
00109  *       needs a relatively big connection interval, and just sometimes, for a temporary
00110  *       period requires shorter connection interval, for example to transfer a higher
00111  *       amount of data.
00112  *       If the given parameters does not match the current connection's parameters
00113  *       this function initiates a new negotiation.
00114  *
00115  * @param[in]   new_params  This contains the new connections parameters to setup.
00116  *
00117  * @return      NRF_SUCCESS on successful initialization, otherwise an error code.
00118  */
00119 uint32_t ble_conn_params_change_conn_params(ble_gap_conn_params_t *new_params);
00120 
00121 /**@brief Function for handling the Application's BLE Stack events.
00122  *
00123  * @details Handles all events from the BLE stack that are of interest to this module.
00124  *
00125  * @param[in]   p_ble_evt  The event received from the BLE stack.
00126  */
00127 void ble_conn_params_on_ble_evt(ble_evt_t * p_ble_evt);
00128 
00129 #endif // BLE_CONN_PARAMS_H__
00130 
00131 /** @} */