Luca Mottola / Mbed OS IOTAtelier1819-BLELed

BLE example of a write characteristic to control a Led

source/main.cpp@1:b1f4696c0018, 2016-07-28 (annotated)

Committer:
Vincent Coubard
Date:
Thu Jul 28 23:13:57 2016 +0100
Revision:
1:b1f4696c0018
Parent:
0:c6a8f2b3efb6
Child:
2:864ddfb70a9c
Sync with mbed-os-5.1.0-rc3

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Vincent Coubard 0:c6a8f2b3efb6 1 /* mbed Microcontroller Library
Vincent Coubard 0:c6a8f2b3efb6 2 * Copyright (c) 2006-2013 ARM Limited
Vincent Coubard 0:c6a8f2b3efb6 3 *
Vincent Coubard 0:c6a8f2b3efb6 4 * Licensed under the Apache License, Version 2.0 (the "License");
Vincent Coubard 0:c6a8f2b3efb6 5 * you may not use this file except in compliance with the License.
Vincent Coubard 0:c6a8f2b3efb6 6 * You may obtain a copy of the License at
Vincent Coubard 0:c6a8f2b3efb6 7 *
Vincent Coubard 0:c6a8f2b3efb6 8 * http://www.apache.org/licenses/LICENSE-2.0
Vincent Coubard 0:c6a8f2b3efb6 9 *
Vincent Coubard 0:c6a8f2b3efb6 10 * Unless required by applicable law or agreed to in writing, software
Vincent Coubard 0:c6a8f2b3efb6 11 * distributed under the License is distributed on an "AS IS" BASIS,
Vincent Coubard 0:c6a8f2b3efb6 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Vincent Coubard 0:c6a8f2b3efb6 13 * See the License for the specific language governing permissions and
Vincent Coubard 0:c6a8f2b3efb6 14 * limitations under the License.
Vincent Coubard 0:c6a8f2b3efb6 15 */
Vincent Coubard 0:c6a8f2b3efb6 16
Vincent Coubard 0:c6a8f2b3efb6 17 #include <mbed-events/events.h>
Vincent Coubard 0:c6a8f2b3efb6 18 #include <mbed.h>
Vincent Coubard 0:c6a8f2b3efb6 19 #include "ble/BLE.h"
Vincent Coubard 0:c6a8f2b3efb6 20 #include "LEDService.h"
Vincent Coubard 0:c6a8f2b3efb6 21
Vincent Coubard 0:c6a8f2b3efb6 22 DigitalOut alivenessLED(LED1, 0);
Vincent Coubard 0:c6a8f2b3efb6 23 DigitalOut actuatedLED(LED2, 0);
Vincent Coubard 0:c6a8f2b3efb6 24
Vincent Coubard 0:c6a8f2b3efb6 25 const static char DEVICE_NAME[] = "LED";
Vincent Coubard 0:c6a8f2b3efb6 26 static const uint16_t uuid16_list[] = {LEDService::LED_SERVICE_UUID};
Vincent Coubard 0:c6a8f2b3efb6 27
Vincent Coubard 0:c6a8f2b3efb6 28 static EventQueue eventQueue(
Vincent Coubard 0:c6a8f2b3efb6 29 /* event count */ 10 * /* event size */ 32
Vincent Coubard 0:c6a8f2b3efb6 30 );
Vincent Coubard 0:c6a8f2b3efb6 31
Vincent Coubard 0:c6a8f2b3efb6 32 LEDService *ledServicePtr;
Vincent Coubard 0:c6a8f2b3efb6 33
Vincent Coubard 0:c6a8f2b3efb6 34 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
Vincent Coubard 0:c6a8f2b3efb6 35 {
Vincent Coubard 0:c6a8f2b3efb6 36 (void) params;
Vincent Coubard 0:c6a8f2b3efb6 37 BLE::Instance().gap().startAdvertising();
Vincent Coubard 0:c6a8f2b3efb6 38 }
Vincent Coubard 0:c6a8f2b3efb6 39
Vincent Coubard 0:c6a8f2b3efb6 40 void blinkCallback(void)
Vincent Coubard 0:c6a8f2b3efb6 41 {
Vincent Coubard 0:c6a8f2b3efb6 42 alivenessLED = !alivenessLED; /* Do blinky on LED1 to indicate system aliveness. */
Vincent Coubard 0:c6a8f2b3efb6 43 }
Vincent Coubard 0:c6a8f2b3efb6 44
Vincent Coubard 0:c6a8f2b3efb6 45 /**
Vincent Coubard 0:c6a8f2b3efb6 46 * This callback allows the LEDService to receive updates to the ledState Characteristic.
Vincent Coubard 0:c6a8f2b3efb6 47 *
Vincent Coubard 0:c6a8f2b3efb6 48 * @param[in] params
Vincent Coubard 0:c6a8f2b3efb6 49 * Information about the characterisitc being updated.
Vincent Coubard 0:c6a8f2b3efb6 50 */
Vincent Coubard 0:c6a8f2b3efb6 51 void onDataWrittenCallback(const GattWriteCallbackParams *params) {
Vincent Coubard 0:c6a8f2b3efb6 52 if ((params->handle == ledServicePtr->getValueHandle()) && (params->len == 1)) {
Vincent Coubard 0:c6a8f2b3efb6 53 actuatedLED = *(params->data);
Vincent Coubard 0:c6a8f2b3efb6 54 }
Vincent Coubard 0:c6a8f2b3efb6 55 }
Vincent Coubard 0:c6a8f2b3efb6 56
Vincent Coubard 0:c6a8f2b3efb6 57 /**
Vincent Coubard 0:c6a8f2b3efb6 58 * This function is called when the ble initialization process has failled
Vincent Coubard 0:c6a8f2b3efb6 59 */
Vincent Coubard 0:c6a8f2b3efb6 60 void onBleInitError(BLE &ble, ble_error_t error)
Vincent Coubard 0:c6a8f2b3efb6 61 {
Vincent Coubard 0:c6a8f2b3efb6 62 /* Initialization error handling should go here */
Vincent Coubard 0:c6a8f2b3efb6 63 }
Vincent Coubard 0:c6a8f2b3efb6 64
Vincent Coubard 0:c6a8f2b3efb6 65 /**
Vincent Coubard 0:c6a8f2b3efb6 66 * Callback triggered when the ble initialization process has finished
Vincent Coubard 0:c6a8f2b3efb6 67 */
Vincent Coubard 0:c6a8f2b3efb6 68 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
Vincent Coubard 0:c6a8f2b3efb6 69 {
Vincent Coubard 0:c6a8f2b3efb6 70 BLE& ble = params->ble;
Vincent Coubard 0:c6a8f2b3efb6 71 ble_error_t error = params->error;
Vincent Coubard 0:c6a8f2b3efb6 72
Vincent Coubard 0:c6a8f2b3efb6 73 if (error != BLE_ERROR_NONE) {
Vincent Coubard 0:c6a8f2b3efb6 74 /* In case of error, forward the error handling to onBleInitError */
Vincent Coubard 0:c6a8f2b3efb6 75 onBleInitError(ble, error);
Vincent Coubard 0:c6a8f2b3efb6 76 return;
Vincent Coubard 0:c6a8f2b3efb6 77 }
Vincent Coubard 0:c6a8f2b3efb6 78
Vincent Coubard 0:c6a8f2b3efb6 79 /* Ensure that it is the default instance of BLE */
Vincent Coubard 0:c6a8f2b3efb6 80 if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
Vincent Coubard 0:c6a8f2b3efb6 81 return;
Vincent Coubard 0:c6a8f2b3efb6 82 }
Vincent Coubard 0:c6a8f2b3efb6 83
Vincent Coubard 0:c6a8f2b3efb6 84 ble.gap().onDisconnection(disconnectionCallback);
Vincent Coubard 0:c6a8f2b3efb6 85 ble.gattServer().onDataWritten(onDataWrittenCallback);
Vincent Coubard 0:c6a8f2b3efb6 86
Vincent Coubard 0:c6a8f2b3efb6 87 bool initialValueForLEDCharacteristic = false;
Vincent Coubard 0:c6a8f2b3efb6 88 ledServicePtr = new LEDService(ble, initialValueForLEDCharacteristic);
Vincent Coubard 0:c6a8f2b3efb6 89
Vincent Coubard 0:c6a8f2b3efb6 90 /* setup advertising */
Vincent Coubard 0:c6a8f2b3efb6 91 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
Vincent Coubard 0:c6a8f2b3efb6 92 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
Vincent Coubard 0:c6a8f2b3efb6 93 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
Vincent Coubard 0:c6a8f2b3efb6 94 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
Vincent Coubard 0:c6a8f2b3efb6 95 ble.gap().setAdvertisingInterval(1000); /* 1000ms. */
Vincent Coubard 0:c6a8f2b3efb6 96 ble.gap().startAdvertising();
Vincent Coubard 0:c6a8f2b3efb6 97 }
Vincent Coubard 0:c6a8f2b3efb6 98
Vincent Coubard 0:c6a8f2b3efb6 99 void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) {
Vincent Coubard 0:c6a8f2b3efb6 100 BLE &ble = BLE::Instance();
Vincent Coubard 0:c6a8f2b3efb6 101 eventQueue.post(Callback<void()>(&ble, &BLE::processEvents));
Vincent Coubard 0:c6a8f2b3efb6 102 }
Vincent Coubard 0:c6a8f2b3efb6 103
Vincent Coubard 0:c6a8f2b3efb6 104 int main()
Vincent Coubard 0:c6a8f2b3efb6 105 {
Vincent Coubard 1:b1f4696c0018 106 eventQueue.post_every(500, blinkCallback);
Vincent Coubard 0:c6a8f2b3efb6 107
Vincent Coubard 0:c6a8f2b3efb6 108 BLE &ble = BLE::Instance();
Vincent Coubard 0:c6a8f2b3efb6 109 ble.onEventsToProcess(scheduleBleEventsProcessing);
Vincent Coubard 0:c6a8f2b3efb6 110 ble.init(bleInitComplete);
Vincent Coubard 0:c6a8f2b3efb6 111
Vincent Coubard 0:c6a8f2b3efb6 112 while (true) {
Vincent Coubard 0:c6a8f2b3efb6 113 eventQueue.dispatch();
Vincent Coubard 0:c6a8f2b3efb6 114 }
Vincent Coubard 0:c6a8f2b3efb6 115
Vincent Coubard 0:c6a8f2b3efb6 116 return 0;
Vincent Coubard 0:c6a8f2b3efb6 117 }