Luca Mottola / Mbed OS IOTAtelier1819-BLELed

BLE example of a write characteristic to control a Led

source/main.cpp@72:0ec27f82fe6d, 2018-11-16 (annotated)

Committer:
lmottola
Date:
Fri Nov 16 14:05:43 2018 +0000
Revision:
72:0ec27f82fe6d
Parent:
44:df8adb3bc797 
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 2:864ddfb70a9c 1 /* mbed Microcontroller Library
mbed_official 2:864ddfb70a9c 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 2:864ddfb70a9c 3 *
mbed_official 2:864ddfb70a9c 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 2:864ddfb70a9c 5 * you may not use this file except in compliance with the License.
mbed_official 2:864ddfb70a9c 6 * You may obtain a copy of the License at
mbed_official 2:864ddfb70a9c 7 *
mbed_official 2:864ddfb70a9c 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 2:864ddfb70a9c 9 *
mbed_official 2:864ddfb70a9c 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 2:864ddfb70a9c 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 2:864ddfb70a9c 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 2:864ddfb70a9c 13 * See the License for the specific language governing permissions and
mbed_official 2:864ddfb70a9c 14 * limitations under the License.
mbed_official 2:864ddfb70a9c 15 */
mbed_official 2:864ddfb70a9c 16
mbed_official 11:7404978b24e7 17 #include <events/mbed_events.h>
mbed_official 2:864ddfb70a9c 18 #include <mbed.h>
mbed_official 2:864ddfb70a9c 19 #include "ble/BLE.h"
mbed_official 2:864ddfb70a9c 20 #include "LEDService.h"
mbed_official 2:864ddfb70a9c 21
mbed_official 2:864ddfb70a9c 22 DigitalOut alivenessLED(LED1, 0);
mbed_official 2:864ddfb70a9c 23 DigitalOut actuatedLED(LED2, 0);
mbed_official 2:864ddfb70a9c 24
mbed_official 2:864ddfb70a9c 25 const static char DEVICE_NAME[] = "LED";
mbed_official 2:864ddfb70a9c 26 static const uint16_t uuid16_list[] = {LEDService::LED_SERVICE_UUID};
mbed_official 2:864ddfb70a9c 27
mbed_official 27:ff1fb7b5f9ee 28 static EventQueue eventQueue(/* event count */ 10 * EVENTS_EVENT_SIZE);
mbed_official 2:864ddfb70a9c 29
mbed_official 2:864ddfb70a9c 30 LEDService *ledServicePtr;
mbed_official 2:864ddfb70a9c 31
mbed_official 2:864ddfb70a9c 32 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
mbed_official 2:864ddfb70a9c 33 {
mbed_official 2:864ddfb70a9c 34 (void) params;
mbed_official 2:864ddfb70a9c 35 BLE::Instance().gap().startAdvertising();
mbed_official 2:864ddfb70a9c 36 }
mbed_official 2:864ddfb70a9c 37
mbed_official 2:864ddfb70a9c 38 void blinkCallback(void)
mbed_official 2:864ddfb70a9c 39 {
mbed_official 2:864ddfb70a9c 40 alivenessLED = !alivenessLED; /* Do blinky on LED1 to indicate system aliveness. */
mbed_official 2:864ddfb70a9c 41 }
mbed_official 2:864ddfb70a9c 42
mbed_official 2:864ddfb70a9c 43 /**
mbed_official 2:864ddfb70a9c 44 * This callback allows the LEDService to receive updates to the ledState Characteristic.
mbed_official 2:864ddfb70a9c 45 *
mbed_official 2:864ddfb70a9c 46 * @param[in] params
mbed_official 2:864ddfb70a9c 47 * Information about the characterisitc being updated.
mbed_official 2:864ddfb70a9c 48 */
mbed_official 2:864ddfb70a9c 49 void onDataWrittenCallback(const GattWriteCallbackParams *params) {
mbed_official 2:864ddfb70a9c 50 if ((params->handle == ledServicePtr->getValueHandle()) && (params->len == 1)) {
mbed_official 2:864ddfb70a9c 51 actuatedLED = *(params->data);
mbed_official 2:864ddfb70a9c 52 }
mbed_official 2:864ddfb70a9c 53 }
mbed_official 2:864ddfb70a9c 54
mbed_official 2:864ddfb70a9c 55 /**
mbed_official 2:864ddfb70a9c 56 * This function is called when the ble initialization process has failled
mbed_official 2:864ddfb70a9c 57 */
mbed_official 2:864ddfb70a9c 58 void onBleInitError(BLE &ble, ble_error_t error)
mbed_official 2:864ddfb70a9c 59 {
mbed_official 2:864ddfb70a9c 60 /* Initialization error handling should go here */
mbed_official 2:864ddfb70a9c 61 }
mbed_official 2:864ddfb70a9c 62
mbed_official 44:df8adb3bc797 63 void printMacAddress()
mbed_official 44:df8adb3bc797 64 {
mbed_official 44:df8adb3bc797 65 /* Print out device MAC address to the console*/
mbed_official 44:df8adb3bc797 66 Gap::AddressType_t addr_type;
mbed_official 44:df8adb3bc797 67 Gap::Address_t address;
mbed_official 44:df8adb3bc797 68 BLE::Instance().gap().getAddress(&addr_type, address);
mbed_official 44:df8adb3bc797 69 printf("DEVICE MAC ADDRESS: ");
mbed_official 44:df8adb3bc797 70 for (int i = 5; i >= 1; i--){
mbed_official 44:df8adb3bc797 71 printf("%02x:", address[i]);
mbed_official 44:df8adb3bc797 72 }
mbed_official 44:df8adb3bc797 73 printf("%02x\r\n", address[0]);
mbed_official 44:df8adb3bc797 74 }
mbed_official 44:df8adb3bc797 75
mbed_official 2:864ddfb70a9c 76 /**
mbed_official 2:864ddfb70a9c 77 * Callback triggered when the ble initialization process has finished
mbed_official 2:864ddfb70a9c 78 */
mbed_official 2:864ddfb70a9c 79 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
mbed_official 2:864ddfb70a9c 80 {
mbed_official 2:864ddfb70a9c 81 BLE& ble = params->ble;
mbed_official 2:864ddfb70a9c 82 ble_error_t error = params->error;
mbed_official 2:864ddfb70a9c 83
mbed_official 2:864ddfb70a9c 84 if (error != BLE_ERROR_NONE) {
mbed_official 2:864ddfb70a9c 85 /* In case of error, forward the error handling to onBleInitError */
mbed_official 2:864ddfb70a9c 86 onBleInitError(ble, error);
mbed_official 2:864ddfb70a9c 87 return;
mbed_official 2:864ddfb70a9c 88 }
mbed_official 2:864ddfb70a9c 89
mbed_official 2:864ddfb70a9c 90 /* Ensure that it is the default instance of BLE */
mbed_official 2:864ddfb70a9c 91 if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
mbed_official 2:864ddfb70a9c 92 return;
mbed_official 2:864ddfb70a9c 93 }
mbed_official 2:864ddfb70a9c 94
mbed_official 2:864ddfb70a9c 95 ble.gap().onDisconnection(disconnectionCallback);
mbed_official 2:864ddfb70a9c 96 ble.gattServer().onDataWritten(onDataWrittenCallback);
mbed_official 2:864ddfb70a9c 97
mbed_official 2:864ddfb70a9c 98 bool initialValueForLEDCharacteristic = false;
mbed_official 2:864ddfb70a9c 99 ledServicePtr = new LEDService(ble, initialValueForLEDCharacteristic);
mbed_official 2:864ddfb70a9c 100
mbed_official 2:864ddfb70a9c 101 /* setup advertising */
mbed_official 2:864ddfb70a9c 102 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
mbed_official 2:864ddfb70a9c 103 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
mbed_official 2:864ddfb70a9c 104 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
mbed_official 2:864ddfb70a9c 105 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
mbed_official 2:864ddfb70a9c 106 ble.gap().setAdvertisingInterval(1000); /* 1000ms. */
mbed_official 2:864ddfb70a9c 107 ble.gap().startAdvertising();
mbed_official 44:df8adb3bc797 108
mbed_official 44:df8adb3bc797 109 printMacAddress();
mbed_official 2:864ddfb70a9c 110 }
mbed_official 2:864ddfb70a9c 111
mbed_official 2:864ddfb70a9c 112 void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) {
mbed_official 2:864ddfb70a9c 113 BLE &ble = BLE::Instance();
mbed_official 11:7404978b24e7 114 eventQueue.call(Callback<void()>(&ble, &BLE::processEvents));
mbed_official 2:864ddfb70a9c 115 }
mbed_official 2:864ddfb70a9c 116
mbed_official 2:864ddfb70a9c 117 int main()
mbed_official 2:864ddfb70a9c 118 {
mbed_official 11:7404978b24e7 119 eventQueue.call_every(500, blinkCallback);
mbed_official 2:864ddfb70a9c 120
mbed_official 2:864ddfb70a9c 121 BLE &ble = BLE::Instance();
mbed_official 2:864ddfb70a9c 122 ble.onEventsToProcess(scheduleBleEventsProcessing);
mbed_official 2:864ddfb70a9c 123 ble.init(bleInitComplete);
mbed_official 2:864ddfb70a9c 124
mbed_official 11:7404978b24e7 125 eventQueue.dispatch_forever();
mbed_official 2:864ddfb70a9c 126
mbed_official 2:864ddfb70a9c 127 return 0;
mbed_official 2:864ddfb70a9c 128 }