Bluetooth Low Energy / BLE_API

High level Bluetooth Low Energy API and radio abstraction layer

Dependents:   BLE_ANCS_SDAPI BLE_temperature BLE_HeartRate BLE_ANCS_SDAPI_IRC ... more

Overview

The BLE_API is a high level abstraction for using Bluetooth Low Energy on multiple platforms. For details and examples using the BLE_API please see the BLE_API Summary Page. Or click on the API Documentation tab above.

Supported Services

Supported services can be found in the BLE_API/services folder.

ble/DiscoveredCharacteristic.h@1038:ebf9746bff7d, 2015-12-10 (annotated)

Committer:
rgrover1
Date:
Thu Dec 10 09:15:04 2015 +0000
Revision:
1038:ebf9746bff7d
Parent:
1035:d8ba3cb5a39a
Child:
1042:21a86ac7f5b1
Synchronized with git rev 9ba09113

Author: Rohit Grover

rename UUID::BitOrder_t to ByteOrder

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 993:4d62b7967c11 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 993:4d62b7967c11 50 operator uint8_t() const; /* Disallow implicit conversion into an integer. */
rgrover1 993:4d62b7967c11 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 993:4d62b7967c11 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 993:4d62b7967c11 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 993:4d62b7967c11 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 993:4d62b7967c11 86 ble_error_t read(uint16_t offset, const GattClient::ReadCallback_t& onRead) const;
rgrover1 993:4d62b7967c11 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 993:4d62b7967c11 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 993:4d62b7967c11 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 993:4d62b7967c11 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 993:4d62b7967c11 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 993:4d62b7967c11 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 1035:d8ba3cb5a39a 140 /**
rgrover1 993:4d62b7967c11 141 * Same as above but register the callback wich will be called once the data has been written
rgrover1 993:4d62b7967c11 142 */
rgrover1 993:4d62b7967c11 143 ble_error_t write(uint16_t length, const uint8_t *value, const GattClient::WriteCallback_t& onRead) const;
rgrover1 993:4d62b7967c11 144
rgrover1 1038:ebf9746bff7d 145 void setupLongUUID(UUID::LongUUIDBytes_t longUUID, UUID::ByteOrder_t order = UUID::MSB) {
rgrover1 1035:d8ba3cb5a39a 146 uuid.setupLong(longUUID, order);
rgrover1 716:11b41f651697 147 }
rgrover1 716:11b41f651697 148
rgrover1 716:11b41f651697 149 public:
rgrover1 741:d6dceefb844e 150 const UUID& getUUID(void) const {
rgrover1 741:d6dceefb844e 151 return uuid;
rgrover1 716:11b41f651697 152 }
rgrover1 716:11b41f651697 153
rgrover1 716:11b41f651697 154 const Properties_t& getProperties(void) const {
rgrover1 716:11b41f651697 155 return props;
rgrover1 716:11b41f651697 156 }
rgrover1 716:11b41f651697 157
rgrover1 716:11b41f651697 158 const GattAttribute::Handle_t& getDeclHandle(void) const {
rgrover1 716:11b41f651697 159 return declHandle;
rgrover1 716:11b41f651697 160 }
rgrover1 716:11b41f651697 161 const GattAttribute::Handle_t& getValueHandle(void) const {
rgrover1 716:11b41f651697 162 return valueHandle;
rgrover1 716:11b41f651697 163 }
rgrover1 716:11b41f651697 164
rgrover1 716:11b41f651697 165 public:
rgrover1 716:11b41f651697 166 DiscoveredCharacteristic() : gattc(NULL),
rgrover1 716:11b41f651697 167 uuid(UUID::ShortUUIDBytes_t(0)),
rgrover1 716:11b41f651697 168 props(),
rgrover1 716:11b41f651697 169 declHandle(GattAttribute::INVALID_HANDLE),
rgrover1 716:11b41f651697 170 valueHandle(GattAttribute::INVALID_HANDLE) {
rgrover1 716:11b41f651697 171 /* empty */
rgrover1 716:11b41f651697 172 }
rgrover1 716:11b41f651697 173
rgrover1 716:11b41f651697 174 protected:
rgrover1 716:11b41f651697 175 GattClient *gattc;
rgrover1 716:11b41f651697 176
rgrover1 716:11b41f651697 177 protected:
rgrover1 716:11b41f651697 178 UUID uuid;
rgrover1 716:11b41f651697 179 Properties_t props;
rgrover1 716:11b41f651697 180 GattAttribute::Handle_t declHandle;
rgrover1 716:11b41f651697 181 GattAttribute::Handle_t valueHandle;
rgrover1 716:11b41f651697 182
rgrover1 716:11b41f651697 183 Gap::Handle_t connHandle;
rgrover1 716:11b41f651697 184 };
rgrover1 716:11b41f651697 185
rgrover1 716:11b41f651697 186 #endif /*__DISCOVERED_CHARACTERISTIC_H__*/