ST / Mbed OS mbed-os-example-ble-EddystoneObserver

BLE EddystoneObserver example

This example is a fork of the following mbed-os example:

https://developer.mbed.org/teams/mbed-os-examples/code/mbed-os-example-ble-EddystoneObserver/

Please read the documentation in this page.

source/main.cpp@29:083b9a2cb114, 2017-05-10 (annotated)

Committer:
mbed_official
Date:
Wed May 10 10:16:09 2017 +0100
Revision:
29:083b9a2cb114
Parent:
13:c5f3a7d8764a 
Merge pull request #78 from ashok-rao/master



Using predefined macro for EVENT SIZE.

.

Commit copied from https://github.com/ARMmbed/mbed-os-example-ble

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 3:b1e385adea43 1 /* mbed Microcontroller Library
mbed_official 3:b1e385adea43 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 3:b1e385adea43 3 *
mbed_official 3:b1e385adea43 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 3:b1e385adea43 5 * you may not use this file except in compliance with the License.
mbed_official 3:b1e385adea43 6 * You may obtain a copy of the License at
mbed_official 3:b1e385adea43 7 *
mbed_official 3:b1e385adea43 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 3:b1e385adea43 9 *
mbed_official 3:b1e385adea43 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 3:b1e385adea43 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 3:b1e385adea43 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 3:b1e385adea43 13 * See the License for the specific language governing permissions and
mbed_official 3:b1e385adea43 14 * limitations under the License.
mbed_official 3:b1e385adea43 15 */
mbed_official 3:b1e385adea43 16
mbed_official 13:c5f3a7d8764a 17 #include <events/mbed_events.h>
mbed_official 3:b1e385adea43 18 #include "mbed.h"
mbed_official 3:b1e385adea43 19 #include "ble/BLE.h"
mbed_official 3:b1e385adea43 20
mbed_official 3:b1e385adea43 21 static const int URI_MAX_LENGTH = 18; // Maximum size of service data in ADV packets
mbed_official 3:b1e385adea43 22
mbed_official 29:083b9a2cb114 23 static EventQueue eventQueue(/* event count */ 16 * EVENTS_EVENT_SIZE);
mbed_official 3:b1e385adea43 24
mbed_official 3:b1e385adea43 25 DigitalOut led1(LED1, 1);
mbed_official 3:b1e385adea43 26
mbed_official 3:b1e385adea43 27 void periodicCallback(void)
mbed_official 3:b1e385adea43 28 {
mbed_official 3:b1e385adea43 29 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
mbed_official 3:b1e385adea43 30 }
mbed_official 3:b1e385adea43 31
mbed_official 3:b1e385adea43 32 void decodeURI(const uint8_t* uriData, const size_t uriLen)
mbed_official 3:b1e385adea43 33 {
mbed_official 3:b1e385adea43 34 const char *prefixes[] = {
mbed_official 3:b1e385adea43 35 "http://www.",
mbed_official 3:b1e385adea43 36 "https://www.",
mbed_official 3:b1e385adea43 37 "http://",
mbed_official 3:b1e385adea43 38 "https://",
mbed_official 3:b1e385adea43 39 "urn:uuid:"
mbed_official 3:b1e385adea43 40 };
mbed_official 3:b1e385adea43 41 const size_t NUM_PREFIXES = sizeof(prefixes) / sizeof(char *);
mbed_official 3:b1e385adea43 42 const char *suffixes[] = {
mbed_official 3:b1e385adea43 43 ".com/",
mbed_official 3:b1e385adea43 44 ".org/",
mbed_official 3:b1e385adea43 45 ".edu/",
mbed_official 3:b1e385adea43 46 ".net/",
mbed_official 3:b1e385adea43 47 ".info/",
mbed_official 3:b1e385adea43 48 ".biz/",
mbed_official 3:b1e385adea43 49 ".gov/",
mbed_official 3:b1e385adea43 50 ".com",
mbed_official 3:b1e385adea43 51 ".org",
mbed_official 3:b1e385adea43 52 ".edu",
mbed_official 3:b1e385adea43 53 ".net",
mbed_official 3:b1e385adea43 54 ".info",
mbed_official 3:b1e385adea43 55 ".biz",
mbed_official 3:b1e385adea43 56 ".gov"
mbed_official 3:b1e385adea43 57 };
mbed_official 3:b1e385adea43 58 const size_t NUM_SUFFIXES = sizeof(suffixes) / sizeof(char *);
mbed_official 3:b1e385adea43 59
mbed_official 3:b1e385adea43 60 size_t index = 0;
mbed_official 3:b1e385adea43 61
mbed_official 3:b1e385adea43 62 /* First byte is the URL Scheme. */
mbed_official 3:b1e385adea43 63 if (uriData[index] < NUM_PREFIXES) {
mbed_official 3:b1e385adea43 64 printf("%s", prefixes[uriData[index]]);
mbed_official 3:b1e385adea43 65 index++;
mbed_official 3:b1e385adea43 66 } else {
mbed_official 3:b1e385adea43 67 printf("URL Scheme was not encoded!");
mbed_official 3:b1e385adea43 68 return;
mbed_official 3:b1e385adea43 69 }
mbed_official 3:b1e385adea43 70
mbed_official 3:b1e385adea43 71 /* From second byte onwards we can have a character or a suffix */
mbed_official 3:b1e385adea43 72 while(index < uriLen) {
mbed_official 3:b1e385adea43 73 if (uriData[index] < NUM_SUFFIXES) {
mbed_official 3:b1e385adea43 74 printf("%s", suffixes[uriData[index]]);
mbed_official 3:b1e385adea43 75 } else {
mbed_official 3:b1e385adea43 76 printf("%c", uriData[index]);
mbed_official 3:b1e385adea43 77 }
mbed_official 3:b1e385adea43 78 index++;
mbed_official 3:b1e385adea43 79 }
mbed_official 3:b1e385adea43 80
mbed_official 3:b1e385adea43 81 printf("\n\r");
mbed_official 3:b1e385adea43 82 }
mbed_official 3:b1e385adea43 83
mbed_official 3:b1e385adea43 84 /*
mbed_official 3:b1e385adea43 85 * This function is called every time we scan an advertisement.
mbed_official 3:b1e385adea43 86 */
mbed_official 3:b1e385adea43 87 void advertisementCallback(const Gap::AdvertisementCallbackParams_t *params)
mbed_official 3:b1e385adea43 88 {
mbed_official 3:b1e385adea43 89 struct AdvertisingData_t {
mbed_official 3:b1e385adea43 90 uint8_t length; /* doesn't include itself */
mbed_official 3:b1e385adea43 91 GapAdvertisingData::DataType_t dataType;
mbed_official 12:5e1ef2515c70 92 uint8_t data[1];
mbed_official 3:b1e385adea43 93 } AdvDataPacket;
mbed_official 3:b1e385adea43 94
mbed_official 3:b1e385adea43 95 struct ApplicationData_t {
mbed_official 3:b1e385adea43 96 uint8_t applicationSpecificId[2];
mbed_official 3:b1e385adea43 97 uint8_t frameType;
mbed_official 3:b1e385adea43 98 uint8_t advPowerLevels;
mbed_official 3:b1e385adea43 99 uint8_t uriData[URI_MAX_LENGTH];
mbed_official 3:b1e385adea43 100 } AppDataPacket;
mbed_official 3:b1e385adea43 101
mbed_official 3:b1e385adea43 102 const uint8_t BEACON_UUID[sizeof(UUID::ShortUUIDBytes_t)] = {0xAA, 0xFE};
mbed_official 3:b1e385adea43 103 const uint8_t FRAME_TYPE_URL = 0x10;
mbed_official 3:b1e385adea43 104 const uint8_t APPLICATION_DATA_OFFSET = sizeof(ApplicationData_t) + sizeof(AdvDataPacket.dataType) - sizeof(AppDataPacket.uriData);
mbed_official 3:b1e385adea43 105
mbed_official 3:b1e385adea43 106 AdvertisingData_t *pAdvData;
mbed_official 3:b1e385adea43 107 size_t index = 0;
mbed_official 3:b1e385adea43 108 while(index < params->advertisingDataLen) {
mbed_official 3:b1e385adea43 109 pAdvData = (AdvertisingData_t *)&params->advertisingData[index];
mbed_official 3:b1e385adea43 110 if (pAdvData->dataType == GapAdvertisingData::SERVICE_DATA) {
mbed_official 3:b1e385adea43 111 ApplicationData_t *pAppData = (ApplicationData_t *) pAdvData->data;
mbed_official 3:b1e385adea43 112 if (!memcmp(pAppData->applicationSpecificId, BEACON_UUID, sizeof(BEACON_UUID)) && (pAppData->frameType == FRAME_TYPE_URL)) {
mbed_official 3:b1e385adea43 113 decodeURI(pAppData->uriData, pAdvData->length - APPLICATION_DATA_OFFSET);
mbed_official 3:b1e385adea43 114 break;
mbed_official 3:b1e385adea43 115 }
mbed_official 3:b1e385adea43 116 }
mbed_official 3:b1e385adea43 117 index += (pAdvData->length + 1);
mbed_official 3:b1e385adea43 118 }
mbed_official 3:b1e385adea43 119 }
mbed_official 3:b1e385adea43 120
mbed_official 3:b1e385adea43 121 void onBleInitError(BLE &ble, ble_error_t error)
mbed_official 3:b1e385adea43 122 {
mbed_official 3:b1e385adea43 123 /* Initialization error handling should go here */
mbed_official 3:b1e385adea43 124 }
mbed_official 3:b1e385adea43 125
mbed_official 3:b1e385adea43 126 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
mbed_official 3:b1e385adea43 127 {
mbed_official 3:b1e385adea43 128 BLE& ble = params->ble;
mbed_official 3:b1e385adea43 129 ble_error_t error = params->error;
mbed_official 3:b1e385adea43 130
mbed_official 3:b1e385adea43 131 if (error != BLE_ERROR_NONE) {
mbed_official 3:b1e385adea43 132 onBleInitError(ble, error);
mbed_official 3:b1e385adea43 133 return;
mbed_official 3:b1e385adea43 134 }
mbed_official 3:b1e385adea43 135
mbed_official 3:b1e385adea43 136 if (ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
mbed_official 3:b1e385adea43 137 return;
mbed_official 3:b1e385adea43 138 }
mbed_official 3:b1e385adea43 139
mbed_official 3:b1e385adea43 140 ble.gap().setScanParams(1800 /* scan interval */, 1500 /* scan window */);
mbed_official 3:b1e385adea43 141 ble.gap().startScan(advertisementCallback);
mbed_official 3:b1e385adea43 142 }
mbed_official 3:b1e385adea43 143
mbed_official 3:b1e385adea43 144 void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) {
mbed_official 3:b1e385adea43 145 BLE &ble = BLE::Instance();
mbed_official 13:c5f3a7d8764a 146 eventQueue.call(Callback<void()>(&ble, &BLE::processEvents));
mbed_official 3:b1e385adea43 147 }
mbed_official 3:b1e385adea43 148
mbed_official 3:b1e385adea43 149 int main()
mbed_official 3:b1e385adea43 150 {
mbed_official 13:c5f3a7d8764a 151 eventQueue.call_every(500, periodicCallback);
mbed_official 3:b1e385adea43 152
mbed_official 3:b1e385adea43 153 BLE &ble = BLE::Instance();
mbed_official 3:b1e385adea43 154 ble.onEventsToProcess(scheduleBleEventsProcessing);
mbed_official 3:b1e385adea43 155 ble.init(bleInitComplete);
mbed_official 3:b1e385adea43 156
mbed_official 13:c5f3a7d8764a 157 eventQueue.dispatch_forever();
mbed_official 3:b1e385adea43 158
mbed_official 3:b1e385adea43 159 return 0;
mbed_official 3:b1e385adea43 160 }