Bluetooth Low Energy / BLE_API

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Dependents:   BLE_ANCS_SDAPI BLE_temperature BLE_HeartRate BLE_ANCS_SDAPI_IRC ... more

ble/DiscoveredCharacteristic.h@741:d6dceefb844e, 2015-07-21 (annotated)

Committer:
rgrover1
Date:
Tue Jul 21 13:25:38 2015 +0100
Revision:
741:d6dceefb844e
Parent:
728:997ba5e7b3b6
Child:
894:29ccb97e1d64
Synchronized with git rev da20f2e2

Author: Andrew Fernandes

Change DiscoveredCharacteristic API to return long or short UUIDs.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 716:11b41f651697 1 /* mbed Microcontroller Library
rgrover1 716:11b41f651697 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 716:11b41f651697 3 *
rgrover1 716:11b41f651697 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 716:11b41f651697 5 * you may not use this file except in compliance with the License.
rgrover1 716:11b41f651697 6 * You may obtain a copy of the License at
rgrover1 716:11b41f651697 7 *
rgrover1 716:11b41f651697 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 716:11b41f651697 9 *
rgrover1 716:11b41f651697 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 716:11b41f651697 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 716:11b41f651697 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 716:11b41f651697 13 * See the License for the specific language governing permissions and
rgrover1 716:11b41f651697 14 * limitations under the License.
rgrover1 716:11b41f651697 15 */
rgrover1 716:11b41f651697 16
rgrover1 716:11b41f651697 17 #ifndef __DISCOVERED_CHARACTERISTIC_H__
rgrover1 716:11b41f651697 18 #define __DISCOVERED_CHARACTERISTIC_H__
rgrover1 716:11b41f651697 19
rgrover1 716:11b41f651697 20 #include "UUID.h"
rgrover1 716:11b41f651697 21 #include "Gap.h"
rgrover1 716:11b41f651697 22 #include "GattAttribute.h"
rgrover1 716:11b41f651697 23 #include "GattClient.h"
rgrover1 716:11b41f651697 24
rgrover1 716:11b41f651697 25 /**
rgrover1 716:11b41f651697 26 * Structure for holding information about the service and the characteristics
rgrover1 716:11b41f651697 27 * found during the discovery process.
rgrover1 716:11b41f651697 28 */
rgrover1 716:11b41f651697 29 class DiscoveredCharacteristic {
rgrover1 716:11b41f651697 30 public:
rgrover1 716:11b41f651697 31 struct Properties_t {
rgrover1 716:11b41f651697 32 uint8_t _broadcast :1; /**< Broadcasting of the value permitted. */
rgrover1 716:11b41f651697 33 uint8_t _read :1; /**< Reading the value permitted. */
rgrover1 716:11b41f651697 34 uint8_t _writeWoResp :1; /**< Writing the value with Write Command permitted. */
rgrover1 716:11b41f651697 35 uint8_t _write :1; /**< Writing the value with Write Request permitted. */
rgrover1 716:11b41f651697 36 uint8_t _notify :1; /**< Notications of the value permitted. */
rgrover1 716:11b41f651697 37 uint8_t _indicate :1; /**< Indications of the value permitted. */
rgrover1 716:11b41f651697 38 uint8_t _authSignedWrite :1; /**< Writing the value with Signed Write Command permitted. */
rgrover1 716:11b41f651697 39
rgrover1 716:11b41f651697 40 public:
rgrover1 716:11b41f651697 41 bool broadcast(void) const {return _broadcast; }
rgrover1 716:11b41f651697 42 bool read(void) const {return _read; }
rgrover1 716:11b41f651697 43 bool writeWoResp(void) const {return _writeWoResp; }
rgrover1 716:11b41f651697 44 bool write(void) const {return _write; }
rgrover1 716:11b41f651697 45 bool notify(void) const {return _notify; }
rgrover1 716:11b41f651697 46 bool indicate(void) const {return _indicate; }
rgrover1 716:11b41f651697 47 bool authSignedWrite(void) const {return _authSignedWrite;}
rgrover1 716:11b41f651697 48
rgrover1 716:11b41f651697 49 private:
rgrover1 716:11b41f651697 50 operator uint8_t() const; /* disallow implicit conversion into an integer */
rgrover1 716:11b41f651697 51 operator unsigned() const; /* disallow implicit conversion into an integer */
rgrover1 716:11b41f651697 52 };
rgrover1 716:11b41f651697 53
rgrover1 716:11b41f651697 54 /**
rgrover1 716:11b41f651697 55 * Structure for holding information about the service and the characteristics
rgrover1 716:11b41f651697 56 * found during the discovery process.
rgrover1 716:11b41f651697 57 */
rgrover1 716:11b41f651697 58 struct DiscoveredDescriptor {
rgrover1 716:11b41f651697 59 GattAttribute::Handle_t handle; /**< Descriptor Handle. */
rgrover1 716:11b41f651697 60 UUID uuid; /**< Descriptor UUID. */
rgrover1 716:11b41f651697 61 };
rgrover1 716:11b41f651697 62
rgrover1 716:11b41f651697 63 /**
rgrover1 716:11b41f651697 64 * Callback type for when a characteristic descriptor is found during descriptor-
rgrover1 716:11b41f651697 65 * discovery. The receiving function is passed in a pointer to a
rgrover1 716:11b41f651697 66 * DiscoveredDescriptor object which will remain valid for the lifetime
rgrover1 716:11b41f651697 67 * of the callback. Memory for this object is owned by the BLE_API eventing
rgrover1 716:11b41f651697 68 * framework. The application can safely make a persistent shallow-copy of
rgrover1 716:11b41f651697 69 * this object in order to work with the characteristic beyond the callback.
rgrover1 716:11b41f651697 70 */
rgrover1 716:11b41f651697 71 typedef void (*DescriptorCallback_t)(const DiscoveredDescriptor *);
rgrover1 716:11b41f651697 72
rgrover1 716:11b41f651697 73 /**
rgrover1 716:11b41f651697 74 * Initiate (or continue) a read for the value attribute, optionally at a
rgrover1 716:11b41f651697 75 * given offset. If the Characteristic or Descriptor to be read is longer
rgrover1 716:11b41f651697 76 * than ATT_MTU - 1, this function must be called multiple times with
rgrover1 716:11b41f651697 77 * appropriate offset to read the complete value.
rgrover1 716:11b41f651697 78 *
rgrover1 716:11b41f651697 79 * @return BLE_ERROR_NONE if a read has been initiated, else
rgrover1 716:11b41f651697 80 * BLE_ERROR_INVALID_STATE if some internal state about the connection is invalid, or
rgrover1 716:11b41f651697 81 * BLE_STACK_BUSY if some client procedure already in progress, or
rgrover1 716:11b41f651697 82 * BLE_ERROR_OPERATION_NOT_PERMITTED due to the characteristic's properties.
rgrover1 716:11b41f651697 83 */
rgrover1 716:11b41f651697 84 ble_error_t read(uint16_t offset = 0) const;
rgrover1 716:11b41f651697 85
rgrover1 716:11b41f651697 86 /**
rgrover1 716:11b41f651697 87 * Perform a write without response procedure.
rgrover1 716:11b41f651697 88 *
rgrover1 716:11b41f651697 89 * @param length
rgrover1 716:11b41f651697 90 * The amount of data being written.
rgrover1 716:11b41f651697 91 * @param value
rgrover1 716:11b41f651697 92 * The bytes being written.
rgrover1 716:11b41f651697 93 *
rgrover1 716:11b41f651697 94 * @note It is important to note that a write without response will generate
rgrover1 716:11b41f651697 95 * an onDataSent() callback when the packet has been transmitted. There
rgrover1 716:11b41f651697 96 * will be a BLE-stack specific limit to the number of pending
rgrover1 716:11b41f651697 97 * writeWoResponse operations; the user may want to use the onDataSent()
rgrover1 716:11b41f651697 98 * callback for flow-control.
rgrover1 716:11b41f651697 99 *
rgrover1 716:11b41f651697 100 * @retval BLE_ERROR_NONE Successfully started the Write procedure, else
rgrover1 716:11b41f651697 101 * BLE_ERROR_INVALID_STATE if some internal state about the connection is invalid, or
rgrover1 716:11b41f651697 102 * BLE_STACK_BUSY if some client procedure already in progress, or
rgrover1 716:11b41f651697 103 * BLE_ERROR_NO_MEM if there are no available buffers left to process the request, or
rgrover1 716:11b41f651697 104 * BLE_ERROR_OPERATION_NOT_PERMITTED due to the characteristic's properties.
rgrover1 716:11b41f651697 105 */
rgrover1 716:11b41f651697 106 ble_error_t writeWoResponse(uint16_t length, const uint8_t *value) const;
rgrover1 716:11b41f651697 107
rgrover1 716:11b41f651697 108 /**
rgrover1 716:11b41f651697 109 * Initiate a GATT Characteristic Descriptor Discovery procedure for descriptors within this characteristic.
rgrover1 716:11b41f651697 110 *
rgrover1 716:11b41f651697 111 * @param callback
rgrover1 716:11b41f651697 112 * @param matchingUUID
rgrover1 716:11b41f651697 113 * filter for descriptors. Defaults to wildcard which will discover all descriptors.
rgrover1 716:11b41f651697 114 *
rgrover1 716:11b41f651697 115 * @return BLE_ERROR_NONE if descriptor discovery is launched successfully; else an appropriate error.
rgrover1 716:11b41f651697 116 */
rgrover1 716:11b41f651697 117 ble_error_t discoverDescriptors(DescriptorCallback_t callback, const UUID &matchingUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN)) const;
rgrover1 716:11b41f651697 118
rgrover1 716:11b41f651697 119 /**
rgrover1 716:11b41f651697 120 * Perform a write procedure.
rgrover1 716:11b41f651697 121 *
rgrover1 716:11b41f651697 122 * @param length
rgrover1 716:11b41f651697 123 * The amount of data being written.
rgrover1 716:11b41f651697 124 * @param value
rgrover1 716:11b41f651697 125 * The bytes being written.
rgrover1 716:11b41f651697 126 *
rgrover1 716:11b41f651697 127 * @note It is important to note that a write will generate
rgrover1 716:11b41f651697 128 * an onDataWritten() callback when the peer acknowledges the request.
rgrover1 716:11b41f651697 129 *
rgrover1 716:11b41f651697 130 * @retval BLE_ERROR_NONE Successfully started the Write procedure, else
rgrover1 716:11b41f651697 131 * BLE_ERROR_INVALID_STATE if some internal state about the connection is invalid, or
rgrover1 716:11b41f651697 132 * BLE_STACK_BUSY if some client procedure already in progress, or
rgrover1 716:11b41f651697 133 * BLE_ERROR_NO_MEM if there are no available buffers left to process the request, or
rgrover1 716:11b41f651697 134 * BLE_ERROR_OPERATION_NOT_PERMITTED due to the characteristic's properties.
rgrover1 716:11b41f651697 135 */
rgrover1 716:11b41f651697 136 ble_error_t write(uint16_t length, const uint8_t *value) const;
rgrover1 716:11b41f651697 137
rgrover1 716:11b41f651697 138 void setupLongUUID(UUID::LongUUIDBytes_t longUUID) {
rgrover1 716:11b41f651697 139 uuid.setupLong(longUUID);
rgrover1 716:11b41f651697 140 }
rgrover1 716:11b41f651697 141
rgrover1 716:11b41f651697 142 public:
rgrover1 741:d6dceefb844e 143 const UUID& getUUID(void) const {
rgrover1 741:d6dceefb844e 144 return uuid;
rgrover1 716:11b41f651697 145 }
rgrover1 716:11b41f651697 146
rgrover1 716:11b41f651697 147 const Properties_t& getProperties(void) const {
rgrover1 716:11b41f651697 148 return props;
rgrover1 716:11b41f651697 149 }
rgrover1 716:11b41f651697 150
rgrover1 716:11b41f651697 151 const GattAttribute::Handle_t& getDeclHandle(void) const {
rgrover1 716:11b41f651697 152 return declHandle;
rgrover1 716:11b41f651697 153 }
rgrover1 716:11b41f651697 154 const GattAttribute::Handle_t& getValueHandle(void) const {
rgrover1 716:11b41f651697 155 return valueHandle;
rgrover1 716:11b41f651697 156 }
rgrover1 716:11b41f651697 157
rgrover1 716:11b41f651697 158 public:
rgrover1 716:11b41f651697 159 DiscoveredCharacteristic() : gattc(NULL),
rgrover1 716:11b41f651697 160 uuid(UUID::ShortUUIDBytes_t(0)),
rgrover1 716:11b41f651697 161 props(),
rgrover1 716:11b41f651697 162 declHandle(GattAttribute::INVALID_HANDLE),
rgrover1 716:11b41f651697 163 valueHandle(GattAttribute::INVALID_HANDLE) {
rgrover1 716:11b41f651697 164 /* empty */
rgrover1 716:11b41f651697 165 }
rgrover1 716:11b41f651697 166
rgrover1 716:11b41f651697 167 protected:
rgrover1 716:11b41f651697 168 GattClient *gattc;
rgrover1 716:11b41f651697 169
rgrover1 716:11b41f651697 170 protected:
rgrover1 716:11b41f651697 171 UUID uuid;
rgrover1 716:11b41f651697 172 Properties_t props;
rgrover1 716:11b41f651697 173 GattAttribute::Handle_t declHandle;
rgrover1 716:11b41f651697 174 GattAttribute::Handle_t valueHandle;
rgrover1 716:11b41f651697 175
rgrover1 716:11b41f651697 176 Gap::Handle_t connHandle;
rgrover1 716:11b41f651697 177 };
rgrover1 716:11b41f651697 178
rgrover1 716:11b41f651697 179 #endif /*__DISCOVERED_CHARACTERISTIC_H__*/