Luca Mottola / Mbed OS IOTAtelier1819-BLELed

BLE example of a write characteristic to control a Led

source/main.cpp@27:ff1fb7b5f9ee, 2017-05-10 (annotated)

Committer:
mbed_official
Date:
Wed May 10 10:17:08 2017 +0100
Revision:
27:ff1fb7b5f9ee
Parent:
11:7404978b24e7
Child:
44:df8adb3bc797
Merge pull request #78 from ashok-rao/master



Using predefined macro for EVENT SIZE.

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

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 2:864ddfb70a9c 63 /**
mbed_official 2:864ddfb70a9c 64 * Callback triggered when the ble initialization process has finished
mbed_official 2:864ddfb70a9c 65 */
mbed_official 2:864ddfb70a9c 66 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
mbed_official 2:864ddfb70a9c 67 {
mbed_official 2:864ddfb70a9c 68 BLE& ble = params->ble;
mbed_official 2:864ddfb70a9c 69 ble_error_t error = params->error;
mbed_official 2:864ddfb70a9c 70
mbed_official 2:864ddfb70a9c 71 if (error != BLE_ERROR_NONE) {
mbed_official 2:864ddfb70a9c 72 /* In case of error, forward the error handling to onBleInitError */
mbed_official 2:864ddfb70a9c 73 onBleInitError(ble, error);
mbed_official 2:864ddfb70a9c 74 return;
mbed_official 2:864ddfb70a9c 75 }
mbed_official 2:864ddfb70a9c 76
mbed_official 2:864ddfb70a9c 77 /* Ensure that it is the default instance of BLE */
mbed_official 2:864ddfb70a9c 78 if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
mbed_official 2:864ddfb70a9c 79 return;
mbed_official 2:864ddfb70a9c 80 }
mbed_official 2:864ddfb70a9c 81
mbed_official 2:864ddfb70a9c 82 ble.gap().onDisconnection(disconnectionCallback);
mbed_official 2:864ddfb70a9c 83 ble.gattServer().onDataWritten(onDataWrittenCallback);
mbed_official 2:864ddfb70a9c 84
mbed_official 2:864ddfb70a9c 85 bool initialValueForLEDCharacteristic = false;
mbed_official 2:864ddfb70a9c 86 ledServicePtr = new LEDService(ble, initialValueForLEDCharacteristic);
mbed_official 2:864ddfb70a9c 87
mbed_official 2:864ddfb70a9c 88 /* setup advertising */
mbed_official 2:864ddfb70a9c 89 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
mbed_official 2:864ddfb70a9c 90 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
mbed_official 2:864ddfb70a9c 91 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
mbed_official 2:864ddfb70a9c 92 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
mbed_official 2:864ddfb70a9c 93 ble.gap().setAdvertisingInterval(1000); /* 1000ms. */
mbed_official 2:864ddfb70a9c 94 ble.gap().startAdvertising();
mbed_official 2:864ddfb70a9c 95 }
mbed_official 2:864ddfb70a9c 96
mbed_official 2:864ddfb70a9c 97 void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) {
mbed_official 2:864ddfb70a9c 98 BLE &ble = BLE::Instance();
mbed_official 11:7404978b24e7 99 eventQueue.call(Callback<void()>(&ble, &BLE::processEvents));
mbed_official 2:864ddfb70a9c 100 }
mbed_official 2:864ddfb70a9c 101
mbed_official 2:864ddfb70a9c 102 int main()
mbed_official 2:864ddfb70a9c 103 {
mbed_official 11:7404978b24e7 104 eventQueue.call_every(500, blinkCallback);
mbed_official 2:864ddfb70a9c 105
mbed_official 2:864ddfb70a9c 106 BLE &ble = BLE::Instance();
mbed_official 2:864ddfb70a9c 107 ble.onEventsToProcess(scheduleBleEventsProcessing);
mbed_official 2:864ddfb70a9c 108 ble.init(bleInitComplete);
mbed_official 2:864ddfb70a9c 109
mbed_official 11:7404978b24e7 110 eventQueue.dispatch_forever();
mbed_official 2:864ddfb70a9c 111
mbed_official 2:864ddfb70a9c 112 return 0;
mbed_official 2:864ddfb70a9c 113 }