Francesco Arrigo
/
BLELedControlButton
BLELedControlButton Assignment
Revision 74:12ddf126d1a6, committed 2018-11-29
- Comitter:
- framtk
- Date:
- Thu Nov 29 20:17:02 2018 +0000
- Parent:
- 73:9bedb952ab9c
- Commit message:
- done
Changed in this revision
source/main.cpp | Show annotated file Show diff for this revision Revisions of this file |
--- a/source/main.cpp Fri Nov 16 14:19:35 2018 +0000 +++ b/source/main.cpp Thu Nov 29 20:17:02 2018 +0000 @@ -1,199 +0,0 @@ -/* mbed Microcontroller Library - * Copyright (c) 2006-2015 ARM Limited - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include <events/mbed_events.h> -#include <mbed.h> -#include "ble/BLE.h" -#include "ble/DiscoveredCharacteristic.h" -#include "ble/DiscoveredService.h" - -DigitalOut alivenessLED(LED1, 1); -static DiscoveredCharacteristic ledCharacteristic; -static bool triggerLedCharacteristic; -static const char PEER_NAME[] = "LED"; - -static EventQueue eventQueue(/* event count */ 16 * EVENTS_EVENT_SIZE); - -void periodicCallback(void) { - alivenessLED = !alivenessLED; /* Do blinky on LED1 while we're waiting for BLE events */ -} - -void advertisementCallback(const Gap::AdvertisementCallbackParams_t *params) { - // parse the advertising payload, looking for data type COMPLETE_LOCAL_NAME - // The advertising payload is a collection of key/value records where - // byte 0: length of the record excluding this byte - // byte 1: The key, it is the type of the data - // byte [2..N] The value. N is equal to byte0 - 1 - for (uint8_t i = 0; i < params->advertisingDataLen; ++i) { - - const uint8_t record_length = params->advertisingData[i]; - if (record_length == 0) { - continue; - } - const uint8_t type = params->advertisingData[i + 1]; - const uint8_t* value = params->advertisingData + i + 2; - const uint8_t value_length = record_length - 1; - - if(type == GapAdvertisingData::COMPLETE_LOCAL_NAME) { - if ((value_length == sizeof(PEER_NAME)) && (memcmp(value, PEER_NAME, value_length) == 0)) { - printf( - "adv peerAddr[%02x %02x %02x %02x %02x %02x] rssi %d, isScanResponse %u, AdvertisementType %u\r\n", - params->peerAddr[5], params->peerAddr[4], params->peerAddr[3], params->peerAddr[2], - params->peerAddr[1], params->peerAddr[0], params->rssi, params->isScanResponse, params->type - ); - BLE::Instance().gap().connect(params->peerAddr, Gap::ADDR_TYPE_RANDOM_STATIC, NULL, NULL); - break; - } - } - i += record_length; - } -} - -void serviceDiscoveryCallback(const DiscoveredService *service) { - if (service->getUUID().shortOrLong() == UUID::UUID_TYPE_SHORT) { - printf("S UUID-%x attrs[%u %u]\r\n", service->getUUID().getShortUUID(), service->getStartHandle(), service->getEndHandle()); - } else { - printf("S UUID-"); - const uint8_t *longUUIDBytes = service->getUUID().getBaseUUID(); - for (unsigned i = 0; i < UUID::LENGTH_OF_LONG_UUID; i++) { - printf("%02x", longUUIDBytes[i]); - } - printf(" attrs[%u %u]\r\n", service->getStartHandle(), service->getEndHandle()); - } -} - -void updateLedCharacteristic(void) { - if (!BLE::Instance().gattClient().isServiceDiscoveryActive()) { - ledCharacteristic.read(); - } -} - -void characteristicDiscoveryCallback(const DiscoveredCharacteristic *characteristicP) { - printf(" C UUID-%x valueAttr[%u] props[%x]\r\n", characteristicP->getUUID().getShortUUID(), characteristicP->getValueHandle(), (uint8_t)characteristicP->getProperties().broadcast()); - if (characteristicP->getUUID().getShortUUID() == 0xa001) { /* !ALERT! Alter this filter to suit your device. */ - ledCharacteristic = *characteristicP; - triggerLedCharacteristic = true; - } -} - -void discoveryTerminationCallback(Gap::Handle_t connectionHandle) { - printf("terminated SD for handle %u\r\n", connectionHandle); - if (triggerLedCharacteristic) { - triggerLedCharacteristic = false; - eventQueue.call(updateLedCharacteristic); - } -} - -void connectionCallback(const Gap::ConnectionCallbackParams_t *params) { - if (params->role == Gap::CENTRAL) { - BLE &ble = BLE::Instance(); - ble.gattClient().onServiceDiscoveryTermination(discoveryTerminationCallback); - ble.gattClient().launchServiceDiscovery(params->handle, serviceDiscoveryCallback, characteristicDiscoveryCallback, 0xa000, 0xa001); - } -} - -void triggerToggledWrite(const GattReadCallbackParams *response) { - if (response->handle == ledCharacteristic.getValueHandle()) { - printf("triggerToggledWrite: handle %u, offset %u, len %u\r\n", response->handle, response->offset, response->len); - for (unsigned index = 0; index < response->len; index++) { - printf("%c[%02x]", response->data[index], response->data[index]); - } - printf("\r\n"); - - uint8_t toggledValue = response->data[0] ^ 0x1; - ledCharacteristic.write(1, &toggledValue); - } -} - -void triggerRead(const GattWriteCallbackParams *response) { - if (response->handle == ledCharacteristic.getValueHandle()) { - ledCharacteristic.read(); - } -} - -void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *) { - printf("disconnected\r\n"); - /* Start scanning and try to connect again */ - BLE::Instance().gap().startScan(advertisementCallback); -} - -void onBleInitError(BLE &ble, ble_error_t error) -{ - /* Initialization error handling should go here */ -} - -void printMacAddress() -{ - /* Print out device MAC address to the console*/ - Gap::AddressType_t addr_type; - Gap::Address_t address; - BLE::Instance().gap().getAddress(&addr_type, address); - printf("DEVICE MAC ADDRESS: "); - for (int i = 5; i >= 1; i--){ - printf("%02x:", address[i]); - } - printf("%02x\r\n", address[0]); -} - -void bleInitComplete(BLE::InitializationCompleteCallbackContext *params) -{ - BLE& ble = params->ble; - ble_error_t error = params->error; - - if (error != BLE_ERROR_NONE) { - /* In case of error, forward the error handling to onBleInitError */ - onBleInitError(ble, error); - return; - } - - /* Ensure that it is the default instance of BLE */ - if (ble.getInstanceID() != BLE::DEFAULT_INSTANCE) { - return; - } - - ble.gap().onDisconnection(disconnectionCallback); - ble.gap().onConnection(connectionCallback); - - ble.gattClient().onDataRead(triggerToggledWrite); - ble.gattClient().onDataWrite(triggerRead); - - // scan interval: 400ms and scan window: 400ms. - // Every 400ms the device will scan for 400ms - // This means that the device will scan continuously. - ble.gap().setScanParams(400, 400); - ble.gap().startScan(advertisementCallback); - - printMacAddress(); -} - -void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) { - BLE &ble = BLE::Instance(); - eventQueue.call(Callback<void()>(&ble, &BLE::processEvents)); -} - -int main() -{ - triggerLedCharacteristic = false; - eventQueue.call_every(500, periodicCallback); - - BLE &ble = BLE::Instance(); - ble.onEventsToProcess(scheduleBleEventsProcessing); - ble.init(bleInitComplete); - - eventQueue.dispatch_forever(); - - return 0; -}