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@1:d839eae15f56, 2016-07-28 (annotated)

Committer:
mbed_official
Date:
Thu Jul 28 23:14:32 2016 +0100
Revision:
1:d839eae15f56
Parent:
0:932f719b42d5
Child:
2:6a3a66fd3889
Merge branch 'master' of https://github.com/ARMmbed/mbed-os-example-ble





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

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 1:d839eae15f56 1 /* mbed Microcontroller Library
mbed_official 1:d839eae15f56 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 1:d839eae15f56 3 *
mbed_official 1:d839eae15f56 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 1:d839eae15f56 5 * you may not use this file except in compliance with the License.
mbed_official 1:d839eae15f56 6 * You may obtain a copy of the License at
mbed_official 1:d839eae15f56 7 *
mbed_official 1:d839eae15f56 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 1:d839eae15f56 9 *
mbed_official 1:d839eae15f56 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 1:d839eae15f56 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 1:d839eae15f56 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 1:d839eae15f56 13 * See the License for the specific language governing permissions and
mbed_official 1:d839eae15f56 14 * limitations under the License.
mbed_official 1:d839eae15f56 15 */
mbed_official 1:d839eae15f56 16
mbed_official 1:d839eae15f56 17 #include <mbed-events/events.h>
mbed_official 1:d839eae15f56 18 #include "mbed.h"
mbed_official 1:d839eae15f56 19 #include "ble/BLE.h"
mbed_official 1:d839eae15f56 20
mbed_official 1:d839eae15f56 21 static const int URI_MAX_LENGTH = 18; // Maximum size of service data in ADV packets
mbed_official 1:d839eae15f56 22
mbed_official 1:d839eae15f56 23 static EventQueue eventQueue(
mbed_official 1:d839eae15f56 24 /* event count */ 16 * /* event size */ 32
mbed_official 1:d839eae15f56 25 );
mbed_official 1:d839eae15f56 26
mbed_official 1:d839eae15f56 27 DigitalOut led1(LED1, 1);
mbed_official 1:d839eae15f56 28
mbed_official 1:d839eae15f56 29 void periodicCallback(void)
mbed_official 1:d839eae15f56 30 {
mbed_official 1:d839eae15f56 31 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
mbed_official 1:d839eae15f56 32 }
mbed_official 1:d839eae15f56 33
mbed_official 1:d839eae15f56 34 void decodeURI(const uint8_t* uriData, const size_t uriLen)
mbed_official 1:d839eae15f56 35 {
mbed_official 1:d839eae15f56 36 const char *prefixes[] = {
mbed_official 1:d839eae15f56 37 "http://www.",
mbed_official 1:d839eae15f56 38 "https://www.",
mbed_official 1:d839eae15f56 39 "http://",
mbed_official 1:d839eae15f56 40 "https://",
mbed_official 1:d839eae15f56 41 "urn:uuid:"
mbed_official 1:d839eae15f56 42 };
mbed_official 1:d839eae15f56 43 const size_t NUM_PREFIXES = sizeof(prefixes) / sizeof(char *);
mbed_official 1:d839eae15f56 44 const char *suffixes[] = {
mbed_official 1:d839eae15f56 45 ".com/",
mbed_official 1:d839eae15f56 46 ".org/",
mbed_official 1:d839eae15f56 47 ".edu/",
mbed_official 1:d839eae15f56 48 ".net/",
mbed_official 1:d839eae15f56 49 ".info/",
mbed_official 1:d839eae15f56 50 ".biz/",
mbed_official 1:d839eae15f56 51 ".gov/",
mbed_official 1:d839eae15f56 52 ".com",
mbed_official 1:d839eae15f56 53 ".org",
mbed_official 1:d839eae15f56 54 ".edu",
mbed_official 1:d839eae15f56 55 ".net",
mbed_official 1:d839eae15f56 56 ".info",
mbed_official 1:d839eae15f56 57 ".biz",
mbed_official 1:d839eae15f56 58 ".gov"
mbed_official 1:d839eae15f56 59 };
mbed_official 1:d839eae15f56 60 const size_t NUM_SUFFIXES = sizeof(suffixes) / sizeof(char *);
mbed_official 1:d839eae15f56 61
mbed_official 1:d839eae15f56 62 size_t index = 0;
mbed_official 1:d839eae15f56 63
mbed_official 1:d839eae15f56 64 /* First byte is the URL Scheme. */
mbed_official 1:d839eae15f56 65 if (uriData[index] < NUM_PREFIXES) {
mbed_official 1:d839eae15f56 66 printf("%s", prefixes[uriData[index]]);
mbed_official 1:d839eae15f56 67 index++;
mbed_official 1:d839eae15f56 68 } else {
mbed_official 1:d839eae15f56 69 printf("URL Scheme was not encoded!");
mbed_official 1:d839eae15f56 70 return;
mbed_official 1:d839eae15f56 71 }
mbed_official 1:d839eae15f56 72
mbed_official 1:d839eae15f56 73 /* From second byte onwards we can have a character or a suffix */
mbed_official 1:d839eae15f56 74 while(index < uriLen) {
mbed_official 1:d839eae15f56 75 if (uriData[index] < NUM_SUFFIXES) {
mbed_official 1:d839eae15f56 76 printf("%s", suffixes[uriData[index]]);
mbed_official 1:d839eae15f56 77 } else {
mbed_official 1:d839eae15f56 78 printf("%c", uriData[index]);
mbed_official 1:d839eae15f56 79 }
mbed_official 1:d839eae15f56 80 index++;
mbed_official 1:d839eae15f56 81 }
mbed_official 1:d839eae15f56 82
mbed_official 1:d839eae15f56 83 printf("\n\r");
mbed_official 1:d839eae15f56 84 }
mbed_official 1:d839eae15f56 85
mbed_official 1:d839eae15f56 86 /*
mbed_official 1:d839eae15f56 87 * This function is called every time we scan an advertisement.
mbed_official 1:d839eae15f56 88 */
mbed_official 1:d839eae15f56 89 void advertisementCallback(const Gap::AdvertisementCallbackParams_t *params)
mbed_official 1:d839eae15f56 90 {
mbed_official 1:d839eae15f56 91 struct AdvertisingData_t {
mbed_official 1:d839eae15f56 92 uint8_t length; /* doesn't include itself */
mbed_official 1:d839eae15f56 93 GapAdvertisingData::DataType_t dataType;
mbed_official 1:d839eae15f56 94 uint8_t data[0];
mbed_official 1:d839eae15f56 95 } AdvDataPacket;
mbed_official 1:d839eae15f56 96
mbed_official 1:d839eae15f56 97 struct ApplicationData_t {
mbed_official 1:d839eae15f56 98 uint8_t applicationSpecificId[2];
mbed_official 1:d839eae15f56 99 uint8_t frameType;
mbed_official 1:d839eae15f56 100 uint8_t advPowerLevels;
mbed_official 1:d839eae15f56 101 uint8_t uriData[URI_MAX_LENGTH];
mbed_official 1:d839eae15f56 102 } AppDataPacket;
mbed_official 1:d839eae15f56 103
mbed_official 1:d839eae15f56 104 const uint8_t BEACON_UUID[sizeof(UUID::ShortUUIDBytes_t)] = {0xAA, 0xFE};
mbed_official 1:d839eae15f56 105 const uint8_t FRAME_TYPE_URL = 0x10;
mbed_official 1:d839eae15f56 106 const uint8_t APPLICATION_DATA_OFFSET = sizeof(ApplicationData_t) + sizeof(AdvDataPacket.dataType) - sizeof(AppDataPacket.uriData);
mbed_official 1:d839eae15f56 107
mbed_official 1:d839eae15f56 108 AdvertisingData_t *pAdvData;
mbed_official 1:d839eae15f56 109 size_t index = 0;
mbed_official 1:d839eae15f56 110 while(index < params->advertisingDataLen) {
mbed_official 1:d839eae15f56 111 pAdvData = (AdvertisingData_t *)&params->advertisingData[index];
mbed_official 1:d839eae15f56 112 if (pAdvData->dataType == GapAdvertisingData::SERVICE_DATA) {
mbed_official 1:d839eae15f56 113 ApplicationData_t *pAppData = (ApplicationData_t *) pAdvData->data;
mbed_official 1:d839eae15f56 114 if (!memcmp(pAppData->applicationSpecificId, BEACON_UUID, sizeof(BEACON_UUID)) && (pAppData->frameType == FRAME_TYPE_URL)) {
mbed_official 1:d839eae15f56 115 decodeURI(pAppData->uriData, pAdvData->length - APPLICATION_DATA_OFFSET);
mbed_official 1:d839eae15f56 116 break;
mbed_official 1:d839eae15f56 117 }
mbed_official 1:d839eae15f56 118 }
mbed_official 1:d839eae15f56 119 index += (pAdvData->length + 1);
mbed_official 1:d839eae15f56 120 }
mbed_official 1:d839eae15f56 121 }
mbed_official 1:d839eae15f56 122
mbed_official 1:d839eae15f56 123 void onBleInitError(BLE &ble, ble_error_t error)
mbed_official 1:d839eae15f56 124 {
mbed_official 1:d839eae15f56 125 /* Initialization error handling should go here */
mbed_official 1:d839eae15f56 126 }
mbed_official 1:d839eae15f56 127
mbed_official 1:d839eae15f56 128 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
mbed_official 1:d839eae15f56 129 {
mbed_official 1:d839eae15f56 130 BLE& ble = params->ble;
mbed_official 1:d839eae15f56 131 ble_error_t error = params->error;
mbed_official 1:d839eae15f56 132
mbed_official 1:d839eae15f56 133 if (error != BLE_ERROR_NONE) {
mbed_official 1:d839eae15f56 134 onBleInitError(ble, error);
mbed_official 1:d839eae15f56 135 return;
mbed_official 1:d839eae15f56 136 }
mbed_official 1:d839eae15f56 137
mbed_official 1:d839eae15f56 138 if (ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
mbed_official 1:d839eae15f56 139 return;
mbed_official 1:d839eae15f56 140 }
mbed_official 1:d839eae15f56 141
mbed_official 1:d839eae15f56 142 ble.gap().setScanParams(1800 /* scan interval */, 1500 /* scan window */);
mbed_official 1:d839eae15f56 143 ble.gap().startScan(advertisementCallback);
mbed_official 1:d839eae15f56 144 }
mbed_official 1:d839eae15f56 145
mbed_official 1:d839eae15f56 146 void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) {
mbed_official 1:d839eae15f56 147 BLE &ble = BLE::Instance();
mbed_official 1:d839eae15f56 148 eventQueue.post(Callback<void()>(&ble, &BLE::processEvents));
mbed_official 1:d839eae15f56 149 }
mbed_official 1:d839eae15f56 150
mbed_official 1:d839eae15f56 151 int main()
mbed_official 1:d839eae15f56 152 {
mbed_official 1:d839eae15f56 153 eventQueue.post_every(500, periodicCallback);
mbed_official 1:d839eae15f56 154
mbed_official 1:d839eae15f56 155 BLE &ble = BLE::Instance();
mbed_official 1:d839eae15f56 156 ble.onEventsToProcess(scheduleBleEventsProcessing);
mbed_official 1:d839eae15f56 157 ble.init(bleInitComplete);
mbed_official 1:d839eae15f56 158
mbed_official 1:d839eae15f56 159 while (true) {
mbed_official 1:d839eae15f56 160 eventQueue.dispatch();
mbed_official 1:d839eae15f56 161 }
mbed_official 1:d839eae15f56 162
mbed_official 1:d839eae15f56 163 return 0;
mbed_official 1:d839eae15f56 164 }