Diff: btle/btle_gap.cpp

Revision:

0:eff01767de02

Child:

17:c3e11bb6cb72

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/btle/btle_gap.cpp	Wed Mar 26 14:38:17 2014 +0000
@@ -0,0 +1,90 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "common/common.h"
+
+#include "app_timer.h"
+#include "ble_gap.h"
+#include "ble_conn_params.h"
+
+static inline uint32_t msec_to_1_25msec(uint32_t interval_ms) ATTR_ALWAYS_INLINE ATTR_CONST;
+static void   error_callback(uint32_t nrf_error);
+
+/**************************************************************************/
+/*!
+    @brief      Initialise GAP in the underlying SoftDevice
+
+    @returns
+*/
+/**************************************************************************/
+error_t btle_gap_init(void)
+{
+  ble_gap_conn_params_t   gap_conn_params = { 0 };
+
+  gap_conn_params.min_conn_interval = msec_to_1_25msec(CFG_GAP_CONNECTION_MIN_INTERVAL_MS) ; // in 1.25ms unit
+  gap_conn_params.max_conn_interval = msec_to_1_25msec(CFG_GAP_CONNECTION_MAX_INTERVAL_MS) ; // in 1.25ms unit
+  gap_conn_params.slave_latency     = CFG_GAP_CONNECTION_SLAVE_LATENCY                     ;
+  gap_conn_params.conn_sup_timeout  = CFG_GAP_CONNECTION_SUPERVISION_TIMEOUT_MS / 10       ;  // in 10ms unit
+
+  ble_gap_conn_sec_mode_t sec_mode;
+  BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode); // no security is needed
+
+  ASSERT_STATUS( sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *) CFG_GAP_LOCAL_NAME, strlen(CFG_GAP_LOCAL_NAME)) );
+  ASSERT_STATUS( sd_ble_gap_appearance_set(CFG_GAP_APPEARANCE) );
+  ASSERT_STATUS( sd_ble_gap_ppcp_set(&gap_conn_params) );
+  ASSERT_STATUS( sd_ble_gap_tx_power_set(CFG_BLE_TX_POWER_LEVEL) );
+
+  /* Connection Parameters */
+  enum {
+    FIRST_UPDATE_DELAY = APP_TIMER_TICKS(5000, CFG_TIMER_PRESCALER),
+    NEXT_UPDATE_DELAY  = APP_TIMER_TICKS(5000, CFG_TIMER_PRESCALER),
+    MAX_UPDATE_COUNT   = 3
+  };
+
+  ble_conn_params_init_t cp_init = { 0 };
+
+  cp_init.p_conn_params                  = NULL                    ;
+  cp_init.first_conn_params_update_delay = FIRST_UPDATE_DELAY      ;
+  cp_init.next_conn_params_update_delay  = NEXT_UPDATE_DELAY       ;
+  cp_init.max_conn_params_update_count   = MAX_UPDATE_COUNT        ;
+  cp_init.start_on_notify_cccd_handle    = BLE_GATT_HANDLE_INVALID ;
+  cp_init.disconnect_on_fail             = true                    ;
+  cp_init.evt_handler                    = NULL                    ;
+  cp_init.error_handler                  = error_callback;
+
+  ASSERT_STATUS ( ble_conn_params_init(&cp_init) );
+
+  return ERROR_NONE;
+}
+
+/**************************************************************************/
+/*!
+    @brief      Converts msecs to an integer representing 1.25ms units
+
+    @param[in]  ms
+                The number of milliseconds to conver to 1.25ms units
+
+    @returns    The number of 1.25ms units in the supplied number of ms
+*/
+/**************************************************************************/
+static inline uint32_t msec_to_1_25msec(uint32_t interval_ms)
+{
+  return (interval_ms * 4) / 5 ;
+}
+
+static void error_callback(uint32_t nrf_error)
+{
+  ASSERT_STATUS_RET_VOID( nrf_error );
+}