BLE HID Keyboard example for Delta BLE platform
Fork of BLE_HeartRate_DELTA by
This example demonstrates the HID over GATT profile for keyboard.
1. Running this application on Delta BLE platform 2. To connect and pair with device named "HID_Keyboard" in your mobile (iOS/Android) Settings>Bluetooth page 3. Open a text editing application on your mobile phone 4. On the PC, open the terminal tool (Putty or TeraTerm) and choose the correct COM/BaudRate 5. Enter any character from your PC, and it will be displayed in your mobile phone
Diff: main.cpp
- Revision:
- 0:c7bcc0b36b5e
- Child:
- 1:8bca989a70be
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Thu Oct 13 07:34:53 2016 +0000 @@ -0,0 +1,107 @@ +/* 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 "mbed.h" +#include "ble/BLE.h" +#include "ble/services/HeartRateService.h" +#include "ble/services/BatteryService.h" +#include "ble/services/DeviceInformationService.h" + +DigitalOut led1(LED1); + +const static char DEVICE_NAME[] = "DELTA_HRM1"; +static const uint16_t uuid16_list[] = {GattService::UUID_HEART_RATE_SERVICE, + GattService::UUID_DEVICE_INFORMATION_SERVICE}; +static volatile bool triggerSensorPolling = false; + +uint8_t hrmCounter = 100; // init HRM to 100bps + +HeartRateService *hrService; +DeviceInformationService *deviceInfo; + +void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params) +{ + BLE::Instance(BLE::DEFAULT_INSTANCE).gap().startAdvertising(); // restart advertising +} + +void periodicCallback(void) +{ + led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */ + + /* Note that the periodicCallback() executes in interrupt context, so it is safer to do + * heavy-weight sensor polling from the main thread. */ + triggerSensorPolling = true; +} + +void bleInitComplete(BLE::InitializationCompleteCallbackContext *params) +{ + BLE &ble = params->ble; + ble_error_t error = params->error; + + if (error != BLE_ERROR_NONE) { + return; + } + + ble.gap().onDisconnection(disconnectionCallback); + + /* Setup primary service. */ + hrService = new HeartRateService(ble, hrmCounter, HeartRateService::LOCATION_FINGER); + + /* Setup auxiliary service. */ + deviceInfo = new DeviceInformationService(ble, "DELTA", "NQ620", "SN1", "hw-rev1", "fw-rev1", "soft-rev1"); + + /* Setup advertising. */ + ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); + ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list)); + ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_HEART_RATE_SENSOR); + ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); + ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); + ble.gap().setAdvertisingInterval(1000); /* 1000ms */ + ble.gap().startAdvertising(); +} + +int main(void) +{ + led1 = 1; + Ticker ticker; + ticker.attach(periodicCallback, 1); // blink LED every second + + BLE& ble = BLE::Instance(BLE::DEFAULT_INSTANCE); + ble.init(bleInitComplete); + + /* SpinWait for initialization to complete. This is necessary because the + * BLE object is used in the main loop below. */ + while (ble.hasInitialized() == false) { /* spin loop */ } + + // infinite loop + while (1) { + // check for trigger from periodicCallback() + if (triggerSensorPolling && ble.getGapState().connected) { + triggerSensorPolling = false; + + // Do blocking calls or whatever is necessary for sensor polling. + // In our case, we simply update the HRM measurement. + hrmCounter++; + if (hrmCounter == 175) { // 100 <= HRM bps <=175 + hrmCounter = 100; + } + + hrService->updateHeartRate(hrmCounter); + } else { + ble.waitForEvent(); // low power wait for event + } + } +}