Igor Levkov / BLE_API

test

Dependents:   BLE_PowerBank_HeyFaradey

Fork of BLE_API by Bluetooth Low Energy

ble/GapAdvertisingParams.h@779:6fd9004bc4b7, 2015-08-10 (annotated)

Committer:
rgrover1
Date:
Mon Aug 10 15:19:43 2015 +0100
Revision:
779:6fd9004bc4b7
Parent:
778:04488024e560
Child:
780:a910652015cd
Synchronized with git rev 8ed4a14b

Author: Rohit Grover

minor improvements in the form of comments to Joshua's commit around AdvParams::get/setInterval

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 710:b2e1a2660ec2 1 /* mbed Microcontroller Library
rgrover1 710:b2e1a2660ec2 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 710:b2e1a2660ec2 3 *
rgrover1 710:b2e1a2660ec2 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 710:b2e1a2660ec2 5 * you may not use this file except in compliance with the License.
rgrover1 710:b2e1a2660ec2 6 * You may obtain a copy of the License at
rgrover1 710:b2e1a2660ec2 7 *
rgrover1 710:b2e1a2660ec2 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 710:b2e1a2660ec2 9 *
rgrover1 710:b2e1a2660ec2 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 710:b2e1a2660ec2 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 710:b2e1a2660ec2 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 710:b2e1a2660ec2 13 * See the License for the specific language governing permissions and
rgrover1 710:b2e1a2660ec2 14 * limitations under the License.
rgrover1 710:b2e1a2660ec2 15 */
rgrover1 710:b2e1a2660ec2 16
rgrover1 710:b2e1a2660ec2 17 #ifndef __GAP_ADVERTISING_PARAMS_H__
rgrover1 710:b2e1a2660ec2 18 #define __GAP_ADVERTISING_PARAMS_H__
rgrover1 710:b2e1a2660ec2 19
rgrover1 710:b2e1a2660ec2 20 /**************************************************************************/
rgrover1 710:b2e1a2660ec2 21 /*!
rgrover1 710:b2e1a2660ec2 22 \brief
rgrover1 710:b2e1a2660ec2 23 This class provides a wrapper for the core advertising parameters,
rgrover1 710:b2e1a2660ec2 24 including the advertising type (Connectable Undirected,
rgrover1 710:b2e1a2660ec2 25 Non Connectable Undirected, etc.), as well as the advertising and
rgrover1 710:b2e1a2660ec2 26 timeout intervals.
rgrover1 710:b2e1a2660ec2 27
rgrover1 710:b2e1a2660ec2 28 \par
rgrover1 710:b2e1a2660ec2 29 See the following for more information on advertising types:
rgrover1 710:b2e1a2660ec2 30
rgrover1 710:b2e1a2660ec2 31 \li \c Bluetooth Core Specification 4.0 (Vol. 6), Part B, Section 2.3.1
rgrover1 710:b2e1a2660ec2 32 \li \c Bluetooth Core Specification 4.0 (Vol. 3), Part C, Section 9.3
rgrover1 710:b2e1a2660ec2 33 */
rgrover1 710:b2e1a2660ec2 34 /**************************************************************************/
rgrover1 710:b2e1a2660ec2 35 class GapAdvertisingParams {
rgrover1 710:b2e1a2660ec2 36 public:
rgrover1 710:b2e1a2660ec2 37 static const unsigned GAP_ADV_PARAMS_INTERVAL_MIN = 0x0020;
rgrover1 710:b2e1a2660ec2 38 static const unsigned GAP_ADV_PARAMS_INTERVAL_MIN_NONCON = 0x00A0;
rgrover1 710:b2e1a2660ec2 39 static const unsigned GAP_ADV_PARAMS_INTERVAL_MAX = 0x4000;
rgrover1 710:b2e1a2660ec2 40 static const unsigned GAP_ADV_PARAMS_TIMEOUT_MAX = 0x3FFF;
rgrover1 710:b2e1a2660ec2 41
rgrover1 710:b2e1a2660ec2 42 /*!
rgrover1 710:b2e1a2660ec2 43 * Encapsulates the peripheral advertising modes, which determine how
rgrover1 710:b2e1a2660ec2 44 * the device appears to other central devices in hearing range
rgrover1 710:b2e1a2660ec2 45 */
rgrover1 710:b2e1a2660ec2 46 enum AdvertisingType_t {
rgrover1 710:b2e1a2660ec2 47 ADV_CONNECTABLE_UNDIRECTED, /**< Vol 3, Part C, Section 9.3.4 and Vol 6, Part B, Section 2.3.1.1 */
rgrover1 710:b2e1a2660ec2 48 ADV_CONNECTABLE_DIRECTED, /**< Vol 3, Part C, Section 9.3.3 and Vol 6, Part B, Section 2.3.1.2 */
rgrover1 710:b2e1a2660ec2 49 ADV_SCANNABLE_UNDIRECTED, /**< Include support for Scan Response payloads, see Vol 6, Part B, Section 2.3.1.4 */
rgrover1 710:b2e1a2660ec2 50 ADV_NON_CONNECTABLE_UNDIRECTED /**< Vol 3, Part C, Section 9.3.2 and Vol 6, Part B, Section 2.3.1.3 */
rgrover1 710:b2e1a2660ec2 51 };
rgrover1 710:b2e1a2660ec2 52 typedef enum AdvertisingType_t AdvertisingType; /* deprecated type alias. */
rgrover1 710:b2e1a2660ec2 53
rgrover1 710:b2e1a2660ec2 54 public:
rgrover1 710:b2e1a2660ec2 55 GapAdvertisingParams(AdvertisingType_t advType = ADV_CONNECTABLE_UNDIRECTED,
rgrover1 710:b2e1a2660ec2 56 uint16_t interval = GAP_ADV_PARAMS_INTERVAL_MIN_NONCON,
rgrover1 710:b2e1a2660ec2 57 uint16_t timeout = 0) : _advType(advType), _interval(interval), _timeout(timeout) {
rgrover1 710:b2e1a2660ec2 58 /* Interval checks */
rgrover1 710:b2e1a2660ec2 59 if (_advType == ADV_CONNECTABLE_DIRECTED) {
rgrover1 710:b2e1a2660ec2 60 /* Interval must be 0 in directed connectable mode */
rgrover1 710:b2e1a2660ec2 61 _interval = 0;
rgrover1 710:b2e1a2660ec2 62 } else if (_advType == ADV_NON_CONNECTABLE_UNDIRECTED) {
rgrover1 710:b2e1a2660ec2 63 /* Min interval is slightly larger than in other modes */
rgrover1 710:b2e1a2660ec2 64 if (_interval < GAP_ADV_PARAMS_INTERVAL_MIN_NONCON) {
rgrover1 710:b2e1a2660ec2 65 _interval = GAP_ADV_PARAMS_INTERVAL_MIN_NONCON;
rgrover1 710:b2e1a2660ec2 66 }
rgrover1 710:b2e1a2660ec2 67 if (_interval > GAP_ADV_PARAMS_INTERVAL_MAX) {
rgrover1 710:b2e1a2660ec2 68 _interval = GAP_ADV_PARAMS_INTERVAL_MAX;
rgrover1 710:b2e1a2660ec2 69 }
rgrover1 710:b2e1a2660ec2 70 } else {
rgrover1 710:b2e1a2660ec2 71 /* Stay within interval limits */
rgrover1 710:b2e1a2660ec2 72 if (_interval < GAP_ADV_PARAMS_INTERVAL_MIN) {
rgrover1 710:b2e1a2660ec2 73 _interval = GAP_ADV_PARAMS_INTERVAL_MIN;
rgrover1 710:b2e1a2660ec2 74 }
rgrover1 710:b2e1a2660ec2 75 if (_interval > GAP_ADV_PARAMS_INTERVAL_MAX) {
rgrover1 710:b2e1a2660ec2 76 _interval = GAP_ADV_PARAMS_INTERVAL_MAX;
rgrover1 710:b2e1a2660ec2 77 }
rgrover1 710:b2e1a2660ec2 78 }
rgrover1 710:b2e1a2660ec2 79
rgrover1 710:b2e1a2660ec2 80 /* Timeout checks */
rgrover1 710:b2e1a2660ec2 81 if (timeout) {
rgrover1 710:b2e1a2660ec2 82 /* Stay within timeout limits */
rgrover1 710:b2e1a2660ec2 83 if (_timeout > GAP_ADV_PARAMS_TIMEOUT_MAX) {
rgrover1 710:b2e1a2660ec2 84 _timeout = GAP_ADV_PARAMS_TIMEOUT_MAX;
rgrover1 710:b2e1a2660ec2 85 }
rgrover1 710:b2e1a2660ec2 86 }
rgrover1 710:b2e1a2660ec2 87 }
rgrover1 710:b2e1a2660ec2 88
rgrover1 766:03f1a26f132f 89 static const uint16_t UNIT_0_625_MS = 625; /**< Number of microseconds in 0.625 milliseconds. */
rgrover1 766:03f1a26f132f 90 static uint16_t MSEC_TO_ADVERTISEMENT_DURATION_UNITS(uint32_t durationInMillis) {
rgrover1 766:03f1a26f132f 91 return (durationInMillis * 1000) / UNIT_0_625_MS;
rgrover1 766:03f1a26f132f 92 }
rgrover1 766:03f1a26f132f 93 static uint16_t ADVERTISEMENT_DURATION_UNITS_TO_MS(uint16_t gapUnits) {
rgrover1 766:03f1a26f132f 94 return (gapUnits * UNIT_0_625_MS) / 1000;
rgrover1 766:03f1a26f132f 95 }
rgrover1 766:03f1a26f132f 96
rgrover1 779:6fd9004bc4b7 97 AdvertisingType_t getAdvertisingType(void) const {
rgrover1 779:6fd9004bc4b7 98 return _advType;
rgrover1 779:6fd9004bc4b7 99 }
rgrover1 779:6fd9004bc4b7 100
rgrover1 779:6fd9004bc4b7 101 /**
rgrover1 779:6fd9004bc4b7 102 * @return the advertisement interval (in milliseconds)
rgrover1 779:6fd9004bc4b7 103 */
rgrover1 779:6fd9004bc4b7 104 uint16_t getInterval(void) const {
rgrover1 779:6fd9004bc4b7 105 return ADVERTISEMENT_DURATION_UNITS_TO_MS(_interval);
rgrover1 779:6fd9004bc4b7 106 }
rgrover1 779:6fd9004bc4b7 107
rgrover1 779:6fd9004bc4b7 108 /**
rgrover1 779:6fd9004bc4b7 109 * @return the advertisement interval in units advertisement duration units--i.e. 0.625ms units.
rgrover1 779:6fd9004bc4b7 110 */
rgrover1 779:6fd9004bc4b7 111 uint16_t getIntervalInAdvUnits(void) const {
rgrover1 779:6fd9004bc4b7 112 return _interval;
rgrover1 779:6fd9004bc4b7 113 }
rgrover1 779:6fd9004bc4b7 114
rgrover1 779:6fd9004bc4b7 115 uint16_t getTimeout(void) const {
rgrover1 779:6fd9004bc4b7 116 return _timeout;
rgrover1 779:6fd9004bc4b7 117 }
rgrover1 710:b2e1a2660ec2 118
rgrover1 710:b2e1a2660ec2 119 void setAdvertisingType(AdvertisingType_t newAdvType) {_advType = newAdvType; }
rgrover1 778:04488024e560 120 void setInterval(uint16_t newInterval) {_interval = MSEC_TO_ADVERTISEMENT_DURATION_UNITS(newInterval);}
rgrover1 710:b2e1a2660ec2 121 void setTimeout(uint16_t newTimeout) {_timeout = newTimeout; }
rgrover1 710:b2e1a2660ec2 122
rgrover1 710:b2e1a2660ec2 123 private:
rgrover1 710:b2e1a2660ec2 124 AdvertisingType_t _advType;
rgrover1 779:6fd9004bc4b7 125 uint16_t _interval; /* in ADV duration units (i.e. 0.625ms) */
rgrover1 779:6fd9004bc4b7 126 uint16_t _timeout; /* in seconds */
rgrover1 710:b2e1a2660ec2 127 };
rgrover1 710:b2e1a2660ec2 128
rgrover1 710:b2e1a2660ec2 129 #endif // ifndef __GAP_ADVERTISING_PARAMS_H__