Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

features/FEATURE_BLE/source/DiscoveredCharacteristic.cpp@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

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elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2006-2013 ARM Limited
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 5 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 6 * You may obtain a copy of the License at
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 9 *
elessair 0:f269e3021894 10 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 11 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 13 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 14 * limitations under the License.
elessair 0:f269e3021894 15 */
elessair 0:f269e3021894 16
elessair 0:f269e3021894 17 #include "ble/DiscoveredCharacteristic.h"
elessair 0:f269e3021894 18 #include "ble/GattClient.h"
elessair 0:f269e3021894 19
elessair 0:f269e3021894 20 ble_error_t
elessair 0:f269e3021894 21 DiscoveredCharacteristic::read(uint16_t offset) const
elessair 0:f269e3021894 22 {
elessair 0:f269e3021894 23 if (!props.read()) {
elessair 0:f269e3021894 24 return BLE_ERROR_OPERATION_NOT_PERMITTED;
elessair 0:f269e3021894 25 }
elessair 0:f269e3021894 26
elessair 0:f269e3021894 27 if (!gattc) {
elessair 0:f269e3021894 28 return BLE_ERROR_INVALID_STATE;
elessair 0:f269e3021894 29 }
elessair 0:f269e3021894 30
elessair 0:f269e3021894 31 return gattc->read(connHandle, valueHandle, offset);
elessair 0:f269e3021894 32 }
elessair 0:f269e3021894 33
elessair 0:f269e3021894 34 struct OneShotReadCallback {
elessair 0:f269e3021894 35 static void launch(GattClient* client, Gap::Handle_t connHandle,
elessair 0:f269e3021894 36 GattAttribute::Handle_t handle, const GattClient::ReadCallback_t& cb) {
elessair 0:f269e3021894 37 OneShotReadCallback* oneShot = new OneShotReadCallback(client, connHandle, handle, cb);
elessair 0:f269e3021894 38 oneShot->attach();
elessair 0:f269e3021894 39 // delete will be made when this callback is called
elessair 0:f269e3021894 40 }
elessair 0:f269e3021894 41
elessair 0:f269e3021894 42 private:
elessair 0:f269e3021894 43 OneShotReadCallback(GattClient* client, Gap::Handle_t connHandle,
elessair 0:f269e3021894 44 GattAttribute::Handle_t handle, const GattClient::ReadCallback_t& cb) :
elessair 0:f269e3021894 45 _client(client),
elessair 0:f269e3021894 46 _connHandle(connHandle),
elessair 0:f269e3021894 47 _handle(handle),
elessair 0:f269e3021894 48 _callback(cb) { }
elessair 0:f269e3021894 49
elessair 0:f269e3021894 50 void attach() {
elessair 0:f269e3021894 51 _client->onDataRead(makeFunctionPointer(this, &OneShotReadCallback::call));
elessair 0:f269e3021894 52 }
elessair 0:f269e3021894 53
elessair 0:f269e3021894 54 void call(const GattReadCallbackParams* params) {
elessair 0:f269e3021894 55 // verifiy that it is the right characteristic on the right connection
elessair 0:f269e3021894 56 if (params->connHandle == _connHandle && params->handle == _handle) {
elessair 0:f269e3021894 57 _callback(params);
elessair 0:f269e3021894 58 _client->onDataRead().detach(makeFunctionPointer(this, &OneShotReadCallback::call));
elessair 0:f269e3021894 59 delete this;
elessair 0:f269e3021894 60 }
elessair 0:f269e3021894 61 }
elessair 0:f269e3021894 62
elessair 0:f269e3021894 63 GattClient* _client;
elessair 0:f269e3021894 64 Gap::Handle_t _connHandle;
elessair 0:f269e3021894 65 GattAttribute::Handle_t _handle;
elessair 0:f269e3021894 66 GattClient::ReadCallback_t _callback;
elessair 0:f269e3021894 67 };
elessair 0:f269e3021894 68
elessair 0:f269e3021894 69 ble_error_t DiscoveredCharacteristic::read(uint16_t offset, const GattClient::ReadCallback_t& onRead) const {
elessair 0:f269e3021894 70 ble_error_t error = read(offset);
elessair 0:f269e3021894 71 if (error) {
elessair 0:f269e3021894 72 return error;
elessair 0:f269e3021894 73 }
elessair 0:f269e3021894 74
elessair 0:f269e3021894 75 OneShotReadCallback::launch(gattc, connHandle, valueHandle, onRead);
elessair 0:f269e3021894 76
elessair 0:f269e3021894 77 return error;
elessair 0:f269e3021894 78 }
elessair 0:f269e3021894 79
elessair 0:f269e3021894 80 ble_error_t
elessair 0:f269e3021894 81 DiscoveredCharacteristic::write(uint16_t length, const uint8_t *value) const
elessair 0:f269e3021894 82 {
elessair 0:f269e3021894 83 if (!props.write()) {
elessair 0:f269e3021894 84 return BLE_ERROR_OPERATION_NOT_PERMITTED;
elessair 0:f269e3021894 85 }
elessair 0:f269e3021894 86
elessair 0:f269e3021894 87 if (!gattc) {
elessair 0:f269e3021894 88 return BLE_ERROR_INVALID_STATE;
elessair 0:f269e3021894 89 }
elessair 0:f269e3021894 90
elessair 0:f269e3021894 91 return gattc->write(GattClient::GATT_OP_WRITE_REQ, connHandle, valueHandle, length, value);
elessair 0:f269e3021894 92 }
elessair 0:f269e3021894 93
elessair 0:f269e3021894 94 ble_error_t
elessair 0:f269e3021894 95 DiscoveredCharacteristic::writeWoResponse(uint16_t length, const uint8_t *value) const
elessair 0:f269e3021894 96 {
elessair 0:f269e3021894 97 if (!props.writeWoResp()) {
elessair 0:f269e3021894 98 return BLE_ERROR_OPERATION_NOT_PERMITTED;
elessair 0:f269e3021894 99 }
elessair 0:f269e3021894 100
elessair 0:f269e3021894 101 if (!gattc) {
elessair 0:f269e3021894 102 return BLE_ERROR_INVALID_STATE;
elessair 0:f269e3021894 103 }
elessair 0:f269e3021894 104
elessair 0:f269e3021894 105 return gattc->write(GattClient::GATT_OP_WRITE_CMD, connHandle, valueHandle, length, value);
elessair 0:f269e3021894 106 }
elessair 0:f269e3021894 107
elessair 0:f269e3021894 108 struct OneShotWriteCallback {
elessair 0:f269e3021894 109 static void launch(GattClient* client, Gap::Handle_t connHandle,
elessair 0:f269e3021894 110 GattAttribute::Handle_t handle, const GattClient::WriteCallback_t& cb) {
elessair 0:f269e3021894 111 OneShotWriteCallback* oneShot = new OneShotWriteCallback(client, connHandle, handle, cb);
elessair 0:f269e3021894 112 oneShot->attach();
elessair 0:f269e3021894 113 // delete will be made when this callback is called
elessair 0:f269e3021894 114 }
elessair 0:f269e3021894 115
elessair 0:f269e3021894 116 private:
elessair 0:f269e3021894 117 OneShotWriteCallback(GattClient* client, Gap::Handle_t connHandle,
elessair 0:f269e3021894 118 GattAttribute::Handle_t handle, const GattClient::WriteCallback_t& cb) :
elessair 0:f269e3021894 119 _client(client),
elessair 0:f269e3021894 120 _connHandle(connHandle),
elessair 0:f269e3021894 121 _handle(handle),
elessair 0:f269e3021894 122 _callback(cb) { }
elessair 0:f269e3021894 123
elessair 0:f269e3021894 124 void attach() {
elessair 0:f269e3021894 125 _client->onDataWritten(makeFunctionPointer(this, &OneShotWriteCallback::call));
elessair 0:f269e3021894 126 }
elessair 0:f269e3021894 127
elessair 0:f269e3021894 128 void call(const GattWriteCallbackParams* params) {
elessair 0:f269e3021894 129 // verifiy that it is the right characteristic on the right connection
elessair 0:f269e3021894 130 if (params->connHandle == _connHandle && params->handle == _handle) {
elessair 0:f269e3021894 131 _callback(params);
elessair 0:f269e3021894 132 _client->onDataWritten().detach(makeFunctionPointer(this, &OneShotWriteCallback::call));
elessair 0:f269e3021894 133 delete this;
elessair 0:f269e3021894 134 }
elessair 0:f269e3021894 135 }
elessair 0:f269e3021894 136
elessair 0:f269e3021894 137 GattClient* _client;
elessair 0:f269e3021894 138 Gap::Handle_t _connHandle;
elessair 0:f269e3021894 139 GattAttribute::Handle_t _handle;
elessair 0:f269e3021894 140 GattClient::WriteCallback_t _callback;
elessair 0:f269e3021894 141 };
elessair 0:f269e3021894 142
elessair 0:f269e3021894 143 ble_error_t DiscoveredCharacteristic::write(uint16_t length, const uint8_t *value, const GattClient::WriteCallback_t& onRead) const {
elessair 0:f269e3021894 144 ble_error_t error = write(length, value);
elessair 0:f269e3021894 145 if (error) {
elessair 0:f269e3021894 146 return error;
elessair 0:f269e3021894 147 }
elessair 0:f269e3021894 148
elessair 0:f269e3021894 149 OneShotWriteCallback::launch(gattc, connHandle, valueHandle, onRead);
elessair 0:f269e3021894 150
elessair 0:f269e3021894 151 return error;
elessair 0:f269e3021894 152 }
elessair 0:f269e3021894 153
elessair 0:f269e3021894 154 ble_error_t DiscoveredCharacteristic::discoverDescriptors(
elessair 0:f269e3021894 155 const CharacteristicDescriptorDiscovery::DiscoveryCallback_t& onCharacteristicDiscovered,
elessair 0:f269e3021894 156 const CharacteristicDescriptorDiscovery::TerminationCallback_t& onTermination) const {
elessair 0:f269e3021894 157
elessair 0:f269e3021894 158 if(!gattc) {
elessair 0:f269e3021894 159 return BLE_ERROR_INVALID_STATE;
elessair 0:f269e3021894 160 }
elessair 0:f269e3021894 161
elessair 0:f269e3021894 162 ble_error_t err = gattc->discoverCharacteristicDescriptors(
elessair 0:f269e3021894 163 *this, onCharacteristicDiscovered, onTermination
elessair 0:f269e3021894 164 );
elessair 0:f269e3021894 165
elessair 0:f269e3021894 166 return err;
elessair 0:f269e3021894 167 }