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nRF51GattClient.h
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2006-2013 ARM Limited 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00017 #ifndef __NRF51822_GATT_CLIENT_H__ 00018 #define __NRF51822_GATT_CLIENT_H__ 00019 00020 #include "ble/GattClient.h" 00021 #include "nRF51ServiceDiscovery.h" 00022 00023 class nRF51GattClient : public GattClient 00024 { 00025 public: 00026 static nRF51GattClient &getInstance(); 00027 00028 /** 00029 * Launch service discovery. Once launched, service discovery will remain 00030 * active with callbacks being issued back into the application for matching 00031 * services/characteristics. isActive() can be used to determine status; and 00032 * a termination callback (if setup) will be invoked at the end. Service 00033 * discovery can be terminated prematurely if needed using terminate(). 00034 * 00035 * @param connectionHandle 00036 * Handle for the connection with the peer. 00037 * @param sc 00038 * This is the application callback for matching service. Taken as 00039 * NULL by default. Note: service discovery may still be active 00040 * when this callback is issued; calling asynchronous BLE-stack 00041 * APIs from within this application callback might cause the 00042 * stack to abort service discovery. If this becomes an issue, it 00043 * may be better to make local copy of the discoveredService and 00044 * wait for service discovery to terminate before operating on the 00045 * service. 00046 * @param cc 00047 * This is the application callback for matching characteristic. 00048 * Taken as NULL by default. Note: service discovery may still be 00049 * active when this callback is issued; calling asynchronous 00050 * BLE-stack APIs from within this application callback might cause 00051 * the stack to abort service discovery. If this becomes an issue, 00052 * it may be better to make local copy of the discoveredCharacteristic 00053 * and wait for service discovery to terminate before operating on the 00054 * characteristic. 00055 * @param matchingServiceUUID 00056 * UUID based filter for specifying a service in which the application is 00057 * interested. By default it is set as the wildcard UUID_UNKNOWN, 00058 * in which case it matches all services. If characteristic-UUID 00059 * filter (below) is set to the wildcard value, then a service 00060 * callback will be invoked for the matching service (or for every 00061 * service if the service filter is a wildcard). 00062 * @param matchingCharacteristicUUIDIn 00063 * UUID based filter for specifying characteristic in which the application 00064 * is interested. By default it is set as the wildcard UUID_UKNOWN 00065 * to match against any characteristic. If both service-UUID 00066 * filter and characteristic-UUID filter are used with non- wildcard 00067 * values, then only a single characteristic callback is 00068 * invoked for the matching characteristic. 00069 * 00070 * @Note Using wildcard values for both service-UUID and characteristic- 00071 * UUID will result in complete service discovery--callbacks being 00072 * called for every service and characteristic. 00073 * 00074 * @return 00075 * BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error. 00076 */ 00077 virtual ble_error_t launchServiceDiscovery(Gap::Handle_t connectionHandle, 00078 ServiceDiscovery::ServiceCallback_t sc = NULL, 00079 ServiceDiscovery::CharacteristicCallback_t cc = NULL, 00080 const UUID &matchingServiceUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN), 00081 const UUID &matchingCharacteristicUUIDIn = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN)); 00082 00083 virtual void onServiceDiscoveryTermination(ServiceDiscovery::TerminationCallback_t callback) { 00084 discovery.onTermination(callback); 00085 } 00086 00087 /** 00088 * Is service-discovery currently active? 00089 */ 00090 virtual bool isServiceDiscoveryActive(void) const { 00091 return discovery.isActive(); 00092 } 00093 00094 /** 00095 * Terminate an ongoing service-discovery. This should result in an 00096 * invocation of the TerminationCallback if service-discovery is active. 00097 */ 00098 virtual void terminateServiceDiscovery(void) { 00099 discovery.terminate(); 00100 } 00101 00102 virtual ble_error_t read(Gap::Handle_t connHandle, GattAttribute::Handle_t attributeHandle, uint16_t offset) const { 00103 uint32_t rc = sd_ble_gattc_read(connHandle, attributeHandle, offset); 00104 if (rc == NRF_SUCCESS) { 00105 return BLE_ERROR_NONE; 00106 } 00107 switch (rc) { 00108 case NRF_ERROR_BUSY: 00109 return BLE_STACK_BUSY; 00110 case BLE_ERROR_INVALID_CONN_HANDLE: 00111 case NRF_ERROR_INVALID_STATE: 00112 case NRF_ERROR_INVALID_ADDR: 00113 default: 00114 return BLE_ERROR_INVALID_STATE; 00115 } 00116 } 00117 00118 virtual ble_error_t write(GattClient::WriteOp_t cmd, Gap::Handle_t connHandle, GattAttribute::Handle_t attributeHandle, size_t length, const uint8_t *value) const { 00119 ble_gattc_write_params_t writeParams = { }; 00120 writeParams.write_op = cmd; 00121 writeParams.handle = attributeHandle; 00122 writeParams.len = length; 00123 writeParams.p_value = const_cast<uint8_t *>(value); 00124 00125 uint32_t rc = sd_ble_gattc_write(connHandle, &writeParams); 00126 if (rc == NRF_SUCCESS) { 00127 return BLE_ERROR_NONE; 00128 } 00129 switch (rc) { 00130 case NRF_ERROR_BUSY: 00131 return BLE_STACK_BUSY; 00132 case BLE_ERROR_NO_TX_BUFFERS: 00133 return BLE_ERROR_NO_MEM; 00134 case BLE_ERROR_INVALID_CONN_HANDLE: 00135 case NRF_ERROR_INVALID_STATE: 00136 case NRF_ERROR_INVALID_ADDR: 00137 default: 00138 return BLE_ERROR_INVALID_STATE; 00139 } 00140 } 00141 00142 public: 00143 nRF51GattClient() : discovery(this) { 00144 /* empty */ 00145 } 00146 00147 friend void bleGattcEventHandler(const ble_evt_t *p_ble_evt); 00148 00149 private: 00150 nRF51GattClient(const nRF51GattClient &); 00151 const nRF51GattClient& operator=(const nRF51GattClient &); 00152 00153 private: 00154 nRF51ServiceDiscovery discovery; 00155 }; 00156 00157 #endif // ifndef __NRF51822_GATT_CLIENT_H__
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