Productize / nRF51822

library for BLE_GAP_backpack

Dependencies:   nrf51-sdk

Fork of nRF51822 by Nordic Semiconductor

btle/btle_discovery.h@293:cd86acfe41be, 2015-06-19 (annotated)

Committer:
rgrover1
Date:
Fri Jun 19 15:55:28 2015 +0100
Revision:
293:cd86acfe41be
Parent:
292:01b717803437
Child:
295:5566c7b83bb5
Synchronized with git rev 248931a5

Author: Rohit Grover

add comment blocks to explain serviceIndicesNeedingUUIDDiscovery.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 239:693a1f145b5a 1 /* mbed Microcontroller Library
rgrover1 239:693a1f145b5a 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 239:693a1f145b5a 3 *
rgrover1 239:693a1f145b5a 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 239:693a1f145b5a 5 * you may not use this file except in compliance with the License.
rgrover1 239:693a1f145b5a 6 * You may obtain a copy of the License at
rgrover1 239:693a1f145b5a 7 *
rgrover1 239:693a1f145b5a 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 239:693a1f145b5a 9 *
rgrover1 239:693a1f145b5a 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 239:693a1f145b5a 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 239:693a1f145b5a 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 239:693a1f145b5a 13 * See the License for the specific language governing permissions and
rgrover1 239:693a1f145b5a 14 * limitations under the License.
rgrover1 239:693a1f145b5a 15 */
rgrover1 239:693a1f145b5a 16
rgrover1 239:693a1f145b5a 17 #ifndef _BTLE_DISCOVERY_H_
rgrover1 239:693a1f145b5a 18 #define _BTLE_DISCOVERY_H_
rgrover1 239:693a1f145b5a 19
rgrover1 247:df37e7bb3f71 20 #include "ble.h"
rgrover1 263:d5da37e9a93b 21 #include "ServiceDiscovery.h"
rgrover1 247:df37e7bb3f71 22
rgrover1 247:df37e7bb3f71 23 void bleGattcEventHandler(const ble_evt_t *p_ble_evt);
rgrover1 239:693a1f145b5a 24
rgrover1 250:db3c51656388 25 class NordicServiceDiscovery : public ServiceDiscovery
rgrover1 250:db3c51656388 26 {
rgrover1 248:71ef03789dd3 27 public:
rgrover1 260:ea2798f615e5 28 static const uint16_t SRV_DISC_START_HANDLE = 0x0001; /**< The start handle value used during service discovery. */
rgrover1 284:29fb6af6671d 29 static const uint16_t SRV_DISC_END_HANDLE = 0xFFFF; /**< The end handle value used during service discovery. */
rgrover1 260:ea2798f615e5 30
rgrover1 289:b33301b019e6 31 public:
rgrover1 248:71ef03789dd3 32 static const unsigned BLE_DB_DISCOVERY_MAX_SRV = 4; /**< Maximum number of services we can retain information for after a single discovery. */
rgrover1 248:71ef03789dd3 33 static const unsigned BLE_DB_DISCOVERY_MAX_CHAR_PER_SRV = 4; /**< Maximum number of characteristics per service we can retain information for. */
rgrover1 260:ea2798f615e5 34
rgrover1 260:ea2798f615e5 35 public:
rgrover1 288:1d85c4a4d397 36 NordicServiceDiscovery() : serviceIndex(0),
rgrover1 288:1d85c4a4d397 37 numServices(0),
rgrover1 288:1d85c4a4d397 38 characteristicIndex(0),
rgrover1 288:1d85c4a4d397 39 numCharacteristics(0),
rgrover1 288:1d85c4a4d397 40 state(INACTIVE),
rgrover1 288:1d85c4a4d397 41 services(),
rgrover1 288:1d85c4a4d397 42 characteristics(),
rgrover1 292:01b717803437 43 serviceIndicesNeedingUUIDDiscovery(this),
rgrover1 288:1d85c4a4d397 44 onTerminationCallback(NULL) {
rgrover1 288:1d85c4a4d397 45 /* empty */
rgrover1 288:1d85c4a4d397 46 }
rgrover1 288:1d85c4a4d397 47
rgrover1 288:1d85c4a4d397 48 public:
rgrover1 260:ea2798f615e5 49 ble_error_t launchCharacteristicDiscovery(Gap::Handle_t connectionHandle, Gap::Handle_t startHandle, Gap::Handle_t endHandle);
rgrover1 239:693a1f145b5a 50
rgrover1 239:693a1f145b5a 51 public:
rgrover1 248:71ef03789dd3 52 void setupDiscoveredServices(const ble_gattc_evt_prim_srvc_disc_rsp_t *response);
rgrover1 248:71ef03789dd3 53 void setupDiscoveredCharacteristics(const ble_gattc_evt_char_disc_rsp_t *response);
rgrover1 248:71ef03789dd3 54
rgrover1 290:83c994bf62d0 55 void triggerServiceUUIDDiscovery(void);
rgrover1 290:83c994bf62d0 56 void processDiscoverUUIDResponse(const ble_gattc_evt_char_val_by_uuid_read_rsp_t *response);
rgrover1 290:83c994bf62d0 57 void removeFirstServiceNeedingUUIDDiscovery(void);
rgrover1 290:83c994bf62d0 58
rgrover1 248:71ef03789dd3 59 void terminateServiceDiscovery(void) {
rgrover1 280:cbaa4cb83548 60 bool wasActive = isActive();
rgrover1 286:042b01e59cf8 61 state = INACTIVE;
rgrover1 280:cbaa4cb83548 62
rgrover1 280:cbaa4cb83548 63 if (wasActive && onTerminationCallback) {
rgrover1 280:cbaa4cb83548 64 onTerminationCallback(connHandle);
rgrover1 280:cbaa4cb83548 65 }
rgrover1 239:693a1f145b5a 66 }
rgrover1 239:693a1f145b5a 67
rgrover1 245:3abc61d38db3 68 void terminateCharacteristicDiscovery(void) {
rgrover1 286:042b01e59cf8 69 if (state == CHARACTERISTIC_DISCOVERY_ACTIVE) {
rgrover1 286:042b01e59cf8 70 state = SERVICE_DISCOVERY_ACTIVE;
rgrover1 286:042b01e59cf8 71 }
rgrover1 245:3abc61d38db3 72 serviceIndex++; /* Progress service index to keep discovery alive. */
rgrover1 245:3abc61d38db3 73 }
rgrover1 245:3abc61d38db3 74
rgrover1 279:6e5e79f1fb61 75 bool isActive(void) const {
rgrover1 286:042b01e59cf8 76 return state != INACTIVE;
rgrover1 279:6e5e79f1fb61 77 }
rgrover1 279:6e5e79f1fb61 78
rgrover1 280:cbaa4cb83548 79 void setOnTermination(TerminationCallback_t callback) {
rgrover1 280:cbaa4cb83548 80 onTerminationCallback = callback;
rgrover1 280:cbaa4cb83548 81 }
rgrover1 280:cbaa4cb83548 82
rgrover1 260:ea2798f615e5 83 private:
rgrover1 239:693a1f145b5a 84 void resetDiscoveredServices(void) {
rgrover1 242:73fc02cc20b1 85 numServices = 0;
rgrover1 242:73fc02cc20b1 86 serviceIndex = 0;
rgrover1 239:693a1f145b5a 87 memset(services, 0, sizeof(DiscoveredService) * BLE_DB_DISCOVERY_MAX_SRV);
rgrover1 239:693a1f145b5a 88 }
rgrover1 239:693a1f145b5a 89
rgrover1 245:3abc61d38db3 90 void resetDiscoveredCharacteristics(void) {
rgrover1 245:3abc61d38db3 91 numCharacteristics = 0;
rgrover1 245:3abc61d38db3 92 characteristicIndex = 0;
rgrover1 245:3abc61d38db3 93 memset(characteristics, 0, sizeof(DiscoveredCharacteristic) * BLE_DB_DISCOVERY_MAX_CHAR_PER_SRV);
rgrover1 245:3abc61d38db3 94 }
rgrover1 245:3abc61d38db3 95
rgrover1 245:3abc61d38db3 96 public:
rgrover1 243:a966506d1e5b 97 void serviceDiscoveryStarted(Gap::Handle_t connectionHandle) {
rgrover1 291:d7590ed48009 98 connHandle = connectionHandle;
rgrover1 243:a966506d1e5b 99 resetDiscoveredServices();
rgrover1 286:042b01e59cf8 100 state = SERVICE_DISCOVERY_ACTIVE;
rgrover1 243:a966506d1e5b 101 }
rgrover1 243:a966506d1e5b 102
rgrover1 260:ea2798f615e5 103 private:
rgrover1 245:3abc61d38db3 104 void characteristicDiscoveryStarted(Gap::Handle_t connectionHandle) {
rgrover1 291:d7590ed48009 105 connHandle = connectionHandle;
rgrover1 245:3abc61d38db3 106 resetDiscoveredCharacteristics();
rgrover1 286:042b01e59cf8 107 state = CHARACTERISTIC_DISCOVERY_ACTIVE;
rgrover1 245:3abc61d38db3 108 }
rgrover1 245:3abc61d38db3 109
rgrover1 251:d4e0cf5e8751 110 private:
rgrover1 293:cd86acfe41be 111 /**
rgrover1 293:cd86acfe41be 112 * A datatype to contain service-indices for which long UUIDs need to be
rgrover1 293:cd86acfe41be 113 * discovered using read_val_by_uuid().
rgrover1 293:cd86acfe41be 114 */
rgrover1 292:01b717803437 115 class ServiceIndicesNeedingUUIDDiscovery {
rgrover1 292:01b717803437 116 public:
rgrover1 292:01b717803437 117 ServiceIndicesNeedingUUIDDiscovery(NordicServiceDiscovery *parent) :
rgrover1 292:01b717803437 118 numIndices(0),
rgrover1 292:01b717803437 119 serviceIndices(),
rgrover1 292:01b717803437 120 parentContainer(parent) {
rgrover1 292:01b717803437 121 /* empty */
rgrover1 292:01b717803437 122 }
rgrover1 292:01b717803437 123
rgrover1 292:01b717803437 124 public:
rgrover1 292:01b717803437 125 void reset(void) {
rgrover1 292:01b717803437 126 numIndices = 0;
rgrover1 292:01b717803437 127 for (unsigned index = 0; index < BLE_DB_DISCOVERY_MAX_SRV; index++) {
rgrover1 292:01b717803437 128 serviceIndices[index] = INVALID_SERVICE_INDEX;
rgrover1 292:01b717803437 129 }
rgrover1 292:01b717803437 130 }
rgrover1 292:01b717803437 131 void append(int serviceIndex) {
rgrover1 292:01b717803437 132 serviceIndices[numIndices++] = serviceIndex;
rgrover1 292:01b717803437 133 }
rgrover1 292:01b717803437 134 void removeFirst(void) {
rgrover1 292:01b717803437 135 numIndices--;
rgrover1 292:01b717803437 136 for (unsigned index = 0; index < numIndices; index++) {
rgrover1 292:01b717803437 137 serviceIndices[index] = serviceIndices[index + 1];
rgrover1 292:01b717803437 138 }
rgrover1 292:01b717803437 139 }
rgrover1 292:01b717803437 140 size_t getCount(void) const {
rgrover1 292:01b717803437 141 return numIndices;
rgrover1 292:01b717803437 142 }
rgrover1 292:01b717803437 143
rgrover1 292:01b717803437 144 void triggerFirst(void);
rgrover1 292:01b717803437 145
rgrover1 292:01b717803437 146 private:
rgrover1 292:01b717803437 147 static const int INVALID_SERVICE_INDEX = -1;
rgrover1 292:01b717803437 148
rgrover1 292:01b717803437 149 private:
rgrover1 292:01b717803437 150 size_t numIndices;
rgrover1 292:01b717803437 151 int serviceIndices[BLE_DB_DISCOVERY_MAX_SRV];
rgrover1 292:01b717803437 152
rgrover1 292:01b717803437 153 NordicServiceDiscovery *parentContainer;
rgrover1 292:01b717803437 154 };
rgrover1 292:01b717803437 155 friend class ServiceIndicesNeedingUUIDDiscovery;
rgrover1 292:01b717803437 156
rgrover1 292:01b717803437 157 private:
rgrover1 251:d4e0cf5e8751 158 friend void bleGattcEventHandler(const ble_evt_t *p_ble_evt);
rgrover1 251:d4e0cf5e8751 159 void progressCharacteristicDiscovery(void);
rgrover1 251:d4e0cf5e8751 160 void progressServiceDiscovery(void);
rgrover1 239:693a1f145b5a 161
rgrover1 248:71ef03789dd3 162 private:
rgrover1 248:71ef03789dd3 163 uint8_t serviceIndex; /**< Index of the current service being discovered. This is intended for internal use during service discovery.*/
rgrover1 248:71ef03789dd3 164 uint8_t numServices; /**< Number of services at the peers GATT database.*/
rgrover1 248:71ef03789dd3 165 uint8_t characteristicIndex; /**< Index of the current characteristic being discovered. This is intended for internal use during service discovery.*/
rgrover1 248:71ef03789dd3 166 uint8_t numCharacteristics; /**< Number of characteristics within the service.*/
rgrover1 248:71ef03789dd3 167
rgrover1 286:042b01e59cf8 168 enum State_t {
rgrover1 286:042b01e59cf8 169 INACTIVE,
rgrover1 286:042b01e59cf8 170 SERVICE_DISCOVERY_ACTIVE,
rgrover1 286:042b01e59cf8 171 CHARACTERISTIC_DISCOVERY_ACTIVE,
rgrover1 290:83c994bf62d0 172 DISCOVER_SERVICE_UUIDS,
rgrover1 286:042b01e59cf8 173 } state;
rgrover1 248:71ef03789dd3 174
rgrover1 248:71ef03789dd3 175 DiscoveredService services[BLE_DB_DISCOVERY_MAX_SRV]; /**< Information related to the current service being discovered.
rgrover1 248:71ef03789dd3 176 * This is intended for internal use during service discovery. */
rgrover1 248:71ef03789dd3 177 DiscoveredCharacteristic characteristics[BLE_DB_DISCOVERY_MAX_CHAR_PER_SRV];
rgrover1 280:cbaa4cb83548 178
rgrover1 292:01b717803437 179 ServiceIndicesNeedingUUIDDiscovery serviceIndicesNeedingUUIDDiscovery;
rgrover1 292:01b717803437 180
rgrover1 280:cbaa4cb83548 181 TerminationCallback_t onTerminationCallback;
rgrover1 240:75b69581d1dd 182 };
rgrover1 240:75b69581d1dd 183
rgrover1 239:693a1f145b5a 184 #endif /*_BTLE_DISCOVERY_H_*/