Varun Bahl / BahlDecrypModified

Updated

Fork of BLE_API by Bluetooth Low Energy

source/BLE.cpp@807:d119f9333581, 2015-09-29 (annotated)

Committer:
rgrover1
Date:
Tue Sep 29 09:47:52 2015 +0100
Revision:
807:d119f9333581
Parent:
732:916f36dd93f8
Child:
808:f902b7ca06a6
Synchronized with git rev ad8e92ac

Author: Rohit Grover

adding an initial prototype for a yotta-config based initialization for BLE transports

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 712:b04b5db36865 1 /* mbed Microcontroller Library
rgrover1 712:b04b5db36865 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 712:b04b5db36865 3 *
rgrover1 712:b04b5db36865 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 712:b04b5db36865 5 * you may not use this file except in compliance with the License.
rgrover1 712:b04b5db36865 6 * You may obtain a copy of the License at
rgrover1 712:b04b5db36865 7 *
rgrover1 712:b04b5db36865 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 712:b04b5db36865 9 *
rgrover1 712:b04b5db36865 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 712:b04b5db36865 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 712:b04b5db36865 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 712:b04b5db36865 13 * See the License for the specific language governing permissions and
rgrover1 712:b04b5db36865 14 * limitations under the License.
rgrover1 712:b04b5db36865 15 */
rgrover1 712:b04b5db36865 16
rgrover1 712:b04b5db36865 17 #include "ble/BLE.h"
rgrover1 712:b04b5db36865 18
rgrover1 712:b04b5db36865 19 #if defined(TARGET_OTA_ENABLED)
rgrover1 732:916f36dd93f8 20 #include "ble/services/DFUService.h"
rgrover1 712:b04b5db36865 21 #endif
rgrover1 712:b04b5db36865 22
rgrover1 712:b04b5db36865 23 ble_error_t
rgrover1 712:b04b5db36865 24 BLE::init()
rgrover1 712:b04b5db36865 25 {
rgrover1 712:b04b5db36865 26 ble_error_t err = transport->init();
rgrover1 712:b04b5db36865 27 if (err != BLE_ERROR_NONE) {
rgrover1 712:b04b5db36865 28 return err;
rgrover1 712:b04b5db36865 29 }
rgrover1 712:b04b5db36865 30
rgrover1 712:b04b5db36865 31 /* Platforms enabled for DFU should introduce the DFU Service into
rgrover1 712:b04b5db36865 32 * applications automatically. */
rgrover1 712:b04b5db36865 33 #if defined(TARGET_OTA_ENABLED)
rgrover1 712:b04b5db36865 34 static DFUService dfu(*this); // defined static so that the object remains alive
rgrover1 712:b04b5db36865 35 #endif // TARGET_OTA_ENABLED
rgrover1 712:b04b5db36865 36
rgrover1 712:b04b5db36865 37 return BLE_ERROR_NONE;
rgrover1 807:d119f9333581 38 }
rgrover1 807:d119f9333581 39
rgrover1 807:d119f9333581 40 /**
rgrover1 807:d119f9333581 41 * BLE::Instance() and BLE constructor rely upon a static array of initializers
rgrover1 807:d119f9333581 42 * to create actual BLE transport instances. A description of these instances
rgrover1 807:d119f9333581 43 * and initializers is supposed to be put in some .json file contributing to
rgrover1 807:d119f9333581 44 * yotta's configuration (typically the target.json). Here's a sample:
rgrover1 807:d119f9333581 45 *
rgrover1 807:d119f9333581 46 * "config": {
rgrover1 807:d119f9333581 47 * ...
rgrover1 807:d119f9333581 48 * "ble_instances": {
rgrover1 807:d119f9333581 49 * "count": 1,
rgrover1 807:d119f9333581 50 * "0" : {
rgrover1 807:d119f9333581 51 * "initializer" : "createBLEInstance"
rgrover1 807:d119f9333581 52 * }
rgrover1 807:d119f9333581 53 * }
rgrover1 807:d119f9333581 54 * }
rgrover1 807:d119f9333581 55 *
rgrover1 807:d119f9333581 56 * The following macros result in translating the above config into a static
rgrover1 807:d119f9333581 57 * array: instanceConstructors.
rgrover1 807:d119f9333581 58 */
rgrover1 807:d119f9333581 59 #ifdef YOTTA_CFG_BLE_INSTANCES_COUNT
rgrover1 807:d119f9333581 60 #define CONCATENATE(A, B) A ## B
rgrover1 807:d119f9333581 61 #define EXPAND(X) X /* this adds a level of indirection needed to allow macro-expansion following a token-paste operation (see use of CONCATENATE() below). */
rgrover1 807:d119f9333581 62
rgrover1 807:d119f9333581 63 #define INITIALIZER_LIST_FOR_INSTANCE_CONSTRUCTORS_1 YOTTA_CFG_BLE_INSTANCES_0_INITIALIZER
rgrover1 807:d119f9333581 64 #define INITIALIZER_LIST_FOR_INSTANCE_CONSTRUCTORS_2 INITIALIZER_LIST_FOR_INSTANCE_CONSTRUCTORS_1, YOTTA_CFG_BLE_INSTANCES_1_INITIALIZER
rgrover1 807:d119f9333581 65 #define INITIALIZER_LIST_FOR_INSTANCE_CONSTRUCTORS_3 INITIALIZER_LIST_FOR_INSTANCE_CONSTRUCTORS_2, YOTTA_CFG_BLE_INSTANCES_2_INITIALIZER
rgrover1 807:d119f9333581 66 #define INITIALIZER_LIST_FOR_INSTANCE_CONSTRUCTORS_4 INITIALIZER_LIST_FOR_INSTANCE_CONSTRUCTORS_3, YOTTA_CFG_BLE_INSTANCES_3_INITIALIZER
rgrover1 807:d119f9333581 67 #define INITIALIZER_LIST_FOR_INSTANCE_CONSTRUCTORS_5 INITIALIZER_LIST_FOR_INSTANCE_CONSTRUCTORS_4, YOTTA_CFG_BLE_INSTANCES_4_INITIALIZER
rgrover1 807:d119f9333581 68 /* ... add more of the above if ever needed */
rgrover1 807:d119f9333581 69
rgrover1 807:d119f9333581 70 #define INITIALIZER_LIST_FOR_INSTANCE_CONSTRUCTORS(N) EXPAND(CONCATENATE(INITIALIZER_LIST_FOR_INSTANCE_CONSTRUCTORS_, N))
rgrover1 807:d119f9333581 71 #endif /* YOTTA_CFG_BLE_INSTANCES_COUNT */
rgrover1 807:d119f9333581 72
rgrover1 807:d119f9333581 73 typedef BLEInstanceBase *(*InstanceConstructor_t)(void);
rgrover1 807:d119f9333581 74 static const InstanceConstructor_t instanceConstructors[BLE::NUM_INSTANCES] = {
rgrover1 807:d119f9333581 75 #ifndef YOTTA_CFG_BLE_INSTANCES_COUNT
rgrover1 807:d119f9333581 76 createBLEInstance
rgrover1 807:d119f9333581 77 #else
rgrover1 807:d119f9333581 78 INITIALIZER_LIST_FOR_INSTANCE_CONSTRUCTORS(YOTTA_CFG_BLE_INSTANCES_COUNT)
rgrover1 807:d119f9333581 79 #endif
rgrover1 807:d119f9333581 80 };
rgrover1 807:d119f9333581 81
rgrover1 807:d119f9333581 82 BLE::BLE &
rgrover1 807:d119f9333581 83 BLE::Instance(InstanceID_t id)
rgrover1 807:d119f9333581 84 {
rgrover1 807:d119f9333581 85 static BLE *singletons[NUM_INSTANCES];
rgrover1 807:d119f9333581 86 if (id < NUM_INSTANCES) {
rgrover1 807:d119f9333581 87 if (singletons[id] == NULL) {
rgrover1 807:d119f9333581 88 singletons[id] = new BLE(id); /* This object will never be freed. */
rgrover1 807:d119f9333581 89 }
rgrover1 807:d119f9333581 90
rgrover1 807:d119f9333581 91 return *singletons[id];
rgrover1 807:d119f9333581 92 }
rgrover1 807:d119f9333581 93
rgrover1 807:d119f9333581 94 /* we come here only in the case of a bad interfaceID. */
rgrover1 807:d119f9333581 95 static BLE badSingleton(NUM_INSTANCES /* this is a bad index; and will result in a NULL transport. */);
rgrover1 807:d119f9333581 96 return badSingleton;
rgrover1 807:d119f9333581 97 }
rgrover1 807:d119f9333581 98
rgrover1 807:d119f9333581 99 BLE::BLE(InstanceID_t instanceID) : transport()
rgrover1 807:d119f9333581 100 {
rgrover1 807:d119f9333581 101 static BLEInstanceBase *transportInstances[NUM_INSTANCES];
rgrover1 807:d119f9333581 102
rgrover1 807:d119f9333581 103 if (instanceID < NUM_INSTANCES) {
rgrover1 807:d119f9333581 104 if (!transportInstances[instanceID]) {
rgrover1 807:d119f9333581 105 transportInstances[instanceID] = instanceConstructors[instanceID](); /* Call the stack's initializer for the transport object. */
rgrover1 807:d119f9333581 106 }
rgrover1 807:d119f9333581 107 transport = transportInstances[instanceID];
rgrover1 807:d119f9333581 108 } else {
rgrover1 807:d119f9333581 109 transport = NULL;
rgrover1 807:d119f9333581 110 }
rgrover1 712:b04b5db36865 111 }