Lancaster University / BLE_API

Lancaster University's fork of the mbed BLE API. Lives on github, https://github.com/lancaster-university/BLE_API

Dependents:   microbit-dal microbit-dal microbit-ble-open microbit-dal ... more

Fork of BLE_API by Bluetooth Low Energy

ble/DiscoveredCharacteristic.h@929:918d93d409c1, 2015-11-26 (annotated)

Committer:
rgrover1
Date:
Thu Nov 26 12:52:05 2015 +0000
Revision:
929:918d93d409c1
Parent:
913:690bea02c431
Child:
931:97e69faa4a5c
Synchronized with git rev ebb982f7

Author: Vincent Coubard

Add read  end to end operation

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 913:690bea02c431 32 uint8_t _broadcast :1; /**< Broadcasting 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 913:690bea02c431 50 operator uint8_t() const; /* Disallow implicit conversion into an integer. */
rgrover1 913:690bea02c431 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 913:690bea02c431 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 913:690bea02c431 79 * @return BLE_ERROR_NONE if a read has been initiated, or
rgrover1 716:11b41f651697 80 * BLE_ERROR_INVALID_STATE if some internal state about the connection is invalid, or
rgrover1 913:690bea02c431 81 * BLE_STACK_BUSY if some client procedure is 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 929:918d93d409c1 86 ble_error_t read(uint16_t offset, const GattClient::ReadCallback_t& onRead) const;
rgrover1 929:918d93d409c1 87
rgrover1 716:11b41f651697 88 /**
rgrover1 716:11b41f651697 89 * Perform a write without response procedure.
rgrover1 716:11b41f651697 90 *
rgrover1 716:11b41f651697 91 * @param length
rgrover1 716:11b41f651697 92 * The amount of data being written.
rgrover1 716:11b41f651697 93 * @param value
rgrover1 716:11b41f651697 94 * The bytes being written.
rgrover1 716:11b41f651697 95 *
rgrover1 716:11b41f651697 96 * @note It is important to note that a write without response will generate
rgrover1 716:11b41f651697 97 * an onDataSent() callback when the packet has been transmitted. There
rgrover1 716:11b41f651697 98 * will be a BLE-stack specific limit to the number of pending
rgrover1 716:11b41f651697 99 * writeWoResponse operations; the user may want to use the onDataSent()
rgrover1 716:11b41f651697 100 * callback for flow-control.
rgrover1 716:11b41f651697 101 *
rgrover1 913:690bea02c431 102 * @retval BLE_ERROR_NONE Successfully started the Write procedure, or
rgrover1 716:11b41f651697 103 * BLE_ERROR_INVALID_STATE if some internal state about the connection is invalid, or
rgrover1 913:690bea02c431 104 * BLE_STACK_BUSY if some client procedure is already in progress, or
rgrover1 716:11b41f651697 105 * BLE_ERROR_NO_MEM if there are no available buffers left to process the request, or
rgrover1 716:11b41f651697 106 * BLE_ERROR_OPERATION_NOT_PERMITTED due to the characteristic's properties.
rgrover1 716:11b41f651697 107 */
rgrover1 716:11b41f651697 108 ble_error_t writeWoResponse(uint16_t length, const uint8_t *value) const;
rgrover1 716:11b41f651697 109
rgrover1 716:11b41f651697 110 /**
rgrover1 716:11b41f651697 111 * Initiate a GATT Characteristic Descriptor Discovery procedure for descriptors within this characteristic.
rgrover1 716:11b41f651697 112 *
rgrover1 716:11b41f651697 113 * @param callback
rgrover1 716:11b41f651697 114 * @param matchingUUID
rgrover1 913:690bea02c431 115 * Filter for descriptors. Defaults to wildcard which will discover all descriptors.
rgrover1 716:11b41f651697 116 *
rgrover1 716:11b41f651697 117 * @return BLE_ERROR_NONE if descriptor discovery is launched successfully; else an appropriate error.
rgrover1 716:11b41f651697 118 */
rgrover1 716:11b41f651697 119 ble_error_t discoverDescriptors(DescriptorCallback_t callback, const UUID &matchingUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN)) const;
rgrover1 716:11b41f651697 120
rgrover1 716:11b41f651697 121 /**
rgrover1 716:11b41f651697 122 * Perform a write procedure.
rgrover1 716:11b41f651697 123 *
rgrover1 716:11b41f651697 124 * @param length
rgrover1 716:11b41f651697 125 * The amount of data being written.
rgrover1 716:11b41f651697 126 * @param value
rgrover1 716:11b41f651697 127 * The bytes being written.
rgrover1 716:11b41f651697 128 *
rgrover1 716:11b41f651697 129 * @note It is important to note that a write will generate
rgrover1 716:11b41f651697 130 * an onDataWritten() callback when the peer acknowledges the request.
rgrover1 716:11b41f651697 131 *
rgrover1 913:690bea02c431 132 * @retval BLE_ERROR_NONE Successfully started the Write procedure, or
rgrover1 716:11b41f651697 133 * BLE_ERROR_INVALID_STATE if some internal state about the connection is invalid, or
rgrover1 913:690bea02c431 134 * BLE_STACK_BUSY if some client procedure is already in progress, or
rgrover1 716:11b41f651697 135 * BLE_ERROR_NO_MEM if there are no available buffers left to process the request, or
rgrover1 716:11b41f651697 136 * BLE_ERROR_OPERATION_NOT_PERMITTED due to the characteristic's properties.
rgrover1 716:11b41f651697 137 */
rgrover1 716:11b41f651697 138 ble_error_t write(uint16_t length, const uint8_t *value) const;
rgrover1 716:11b41f651697 139
rgrover1 716:11b41f651697 140 void setupLongUUID(UUID::LongUUIDBytes_t longUUID) {
rgrover1 716:11b41f651697 141 uuid.setupLong(longUUID);
rgrover1 716:11b41f651697 142 }
rgrover1 716:11b41f651697 143
rgrover1 716:11b41f651697 144 public:
rgrover1 741:d6dceefb844e 145 const UUID& getUUID(void) const {
rgrover1 741:d6dceefb844e 146 return uuid;
rgrover1 716:11b41f651697 147 }
rgrover1 716:11b41f651697 148
rgrover1 716:11b41f651697 149 const Properties_t& getProperties(void) const {
rgrover1 716:11b41f651697 150 return props;
rgrover1 716:11b41f651697 151 }
rgrover1 716:11b41f651697 152
rgrover1 716:11b41f651697 153 const GattAttribute::Handle_t& getDeclHandle(void) const {
rgrover1 716:11b41f651697 154 return declHandle;
rgrover1 716:11b41f651697 155 }
rgrover1 716:11b41f651697 156 const GattAttribute::Handle_t& getValueHandle(void) const {
rgrover1 716:11b41f651697 157 return valueHandle;
rgrover1 716:11b41f651697 158 }
rgrover1 716:11b41f651697 159
rgrover1 716:11b41f651697 160 public:
rgrover1 716:11b41f651697 161 DiscoveredCharacteristic() : gattc(NULL),
rgrover1 716:11b41f651697 162 uuid(UUID::ShortUUIDBytes_t(0)),
rgrover1 716:11b41f651697 163 props(),
rgrover1 716:11b41f651697 164 declHandle(GattAttribute::INVALID_HANDLE),
rgrover1 716:11b41f651697 165 valueHandle(GattAttribute::INVALID_HANDLE) {
rgrover1 716:11b41f651697 166 /* empty */
rgrover1 716:11b41f651697 167 }
rgrover1 716:11b41f651697 168
rgrover1 716:11b41f651697 169 protected:
rgrover1 716:11b41f651697 170 GattClient *gattc;
rgrover1 716:11b41f651697 171
rgrover1 716:11b41f651697 172 protected:
rgrover1 716:11b41f651697 173 UUID uuid;
rgrover1 716:11b41f651697 174 Properties_t props;
rgrover1 716:11b41f651697 175 GattAttribute::Handle_t declHandle;
rgrover1 716:11b41f651697 176 GattAttribute::Handle_t valueHandle;
rgrover1 716:11b41f651697 177
rgrover1 716:11b41f651697 178 Gap::Handle_t connHandle;
rgrover1 716:11b41f651697 179 };
rgrover1 716:11b41f651697 180
rgrover1 716:11b41f651697 181 #endif /*__DISCOVERED_CHARACTERISTIC_H__*/