Delta / Mbed OS BLE_Central_HeartRate_DELTA Featured

Demo BLE Central function

Fork of BLE_HeartRate_DELTA by Delta

This example demonstrates BLE central that to interact with the HRM peripheral.

The example uses two applications running on two different devices:

The first device - the central - runs the application BLE_Central_HeartRate_DELTA from this repository.

The second device - the peripheral - runs the application BLE_HeartRate_DELTA.

main.cpp@1:82331af3e4c9, 2017-03-14 (annotated)

Committer:
tsungta
Date:
Tue Mar 14 08:33:26 2017 +0000
Revision:
1:82331af3e4c9
Parent:
0:c7bcc0b36b5e
Child:
2:504d4bd0e684
update mbed-os so both NNN50 and NQ620 (as well as NQ624 module) platform are supported; Add config in mbed_app.json to fix NQ620 use internal RC issue ; remove the unused shield folder

Who changed what in which revision?

UserRevisionLine numberNew contents of line
silviaChen 0:c7bcc0b36b5e 1 /* mbed Microcontroller Library
silviaChen 0:c7bcc0b36b5e 2 * Copyright (c) 2006-2015 ARM Limited
silviaChen 0:c7bcc0b36b5e 3 *
silviaChen 0:c7bcc0b36b5e 4 * Licensed under the Apache License, Version 2.0 (the "License");
silviaChen 0:c7bcc0b36b5e 5 * you may not use this file except in compliance with the License.
silviaChen 0:c7bcc0b36b5e 6 * You may obtain a copy of the License at
silviaChen 0:c7bcc0b36b5e 7 *
silviaChen 0:c7bcc0b36b5e 8 * http://www.apache.org/licenses/LICENSE-2.0
silviaChen 0:c7bcc0b36b5e 9 *
silviaChen 0:c7bcc0b36b5e 10 * Unless required by applicable law or agreed to in writing, software
silviaChen 0:c7bcc0b36b5e 11 * distributed under the License is distributed on an "AS IS" BASIS,
silviaChen 0:c7bcc0b36b5e 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
silviaChen 0:c7bcc0b36b5e 13 * See the License for the specific language governing permissions and
silviaChen 0:c7bcc0b36b5e 14 * limitations under the License.
silviaChen 0:c7bcc0b36b5e 15 */
silviaChen 0:c7bcc0b36b5e 16
silviaChen 0:c7bcc0b36b5e 17 #include "mbed.h"
silviaChen 0:c7bcc0b36b5e 18 #include "ble/BLE.h"
silviaChen 0:c7bcc0b36b5e 19 #include "ble/services/HeartRateService.h"
silviaChen 0:c7bcc0b36b5e 20 #include "ble/services/BatteryService.h"
silviaChen 0:c7bcc0b36b5e 21 #include "ble/services/DeviceInformationService.h"
silviaChen 0:c7bcc0b36b5e 22
silviaChen 0:c7bcc0b36b5e 23 DigitalOut led1(LED1);
silviaChen 0:c7bcc0b36b5e 24
silviaChen 0:c7bcc0b36b5e 25 const static char DEVICE_NAME[] = "DELTA_HRM1";
silviaChen 0:c7bcc0b36b5e 26 static const uint16_t uuid16_list[] = {GattService::UUID_HEART_RATE_SERVICE,
silviaChen 0:c7bcc0b36b5e 27 GattService::UUID_DEVICE_INFORMATION_SERVICE};
silviaChen 0:c7bcc0b36b5e 28 static volatile bool triggerSensorPolling = false;
silviaChen 0:c7bcc0b36b5e 29
silviaChen 0:c7bcc0b36b5e 30 uint8_t hrmCounter = 100; // init HRM to 100bps
silviaChen 0:c7bcc0b36b5e 31
silviaChen 0:c7bcc0b36b5e 32 HeartRateService *hrService;
silviaChen 0:c7bcc0b36b5e 33 DeviceInformationService *deviceInfo;
silviaChen 0:c7bcc0b36b5e 34
silviaChen 0:c7bcc0b36b5e 35 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
silviaChen 0:c7bcc0b36b5e 36 {
silviaChen 0:c7bcc0b36b5e 37 BLE::Instance(BLE::DEFAULT_INSTANCE).gap().startAdvertising(); // restart advertising
silviaChen 0:c7bcc0b36b5e 38 }
silviaChen 0:c7bcc0b36b5e 39
silviaChen 0:c7bcc0b36b5e 40 void periodicCallback(void)
silviaChen 0:c7bcc0b36b5e 41 {
silviaChen 0:c7bcc0b36b5e 42 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
silviaChen 0:c7bcc0b36b5e 43
silviaChen 0:c7bcc0b36b5e 44 /* Note that the periodicCallback() executes in interrupt context, so it is safer to do
silviaChen 0:c7bcc0b36b5e 45 * heavy-weight sensor polling from the main thread. */
silviaChen 0:c7bcc0b36b5e 46 triggerSensorPolling = true;
silviaChen 0:c7bcc0b36b5e 47 }
silviaChen 0:c7bcc0b36b5e 48
silviaChen 0:c7bcc0b36b5e 49 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
silviaChen 0:c7bcc0b36b5e 50 {
silviaChen 0:c7bcc0b36b5e 51 BLE &ble = params->ble;
silviaChen 0:c7bcc0b36b5e 52 ble_error_t error = params->error;
silviaChen 0:c7bcc0b36b5e 53
silviaChen 0:c7bcc0b36b5e 54 if (error != BLE_ERROR_NONE) {
silviaChen 0:c7bcc0b36b5e 55 return;
silviaChen 0:c7bcc0b36b5e 56 }
silviaChen 0:c7bcc0b36b5e 57
silviaChen 0:c7bcc0b36b5e 58 ble.gap().onDisconnection(disconnectionCallback);
silviaChen 0:c7bcc0b36b5e 59
silviaChen 0:c7bcc0b36b5e 60 /* Setup primary service. */
silviaChen 0:c7bcc0b36b5e 61 hrService = new HeartRateService(ble, hrmCounter, HeartRateService::LOCATION_FINGER);
silviaChen 0:c7bcc0b36b5e 62
silviaChen 0:c7bcc0b36b5e 63 /* Setup auxiliary service. */
silviaChen 0:c7bcc0b36b5e 64 deviceInfo = new DeviceInformationService(ble, "DELTA", "NQ620", "SN1", "hw-rev1", "fw-rev1", "soft-rev1");
silviaChen 0:c7bcc0b36b5e 65
silviaChen 0:c7bcc0b36b5e 66 /* Setup advertising. */
silviaChen 0:c7bcc0b36b5e 67 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
silviaChen 0:c7bcc0b36b5e 68 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
silviaChen 0:c7bcc0b36b5e 69 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_HEART_RATE_SENSOR);
silviaChen 0:c7bcc0b36b5e 70 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
silviaChen 0:c7bcc0b36b5e 71 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
silviaChen 0:c7bcc0b36b5e 72 ble.gap().setAdvertisingInterval(1000); /* 1000ms */
silviaChen 0:c7bcc0b36b5e 73 ble.gap().startAdvertising();
silviaChen 0:c7bcc0b36b5e 74 }
silviaChen 0:c7bcc0b36b5e 75
silviaChen 0:c7bcc0b36b5e 76 int main(void)
silviaChen 0:c7bcc0b36b5e 77 {
silviaChen 0:c7bcc0b36b5e 78 led1 = 1;
silviaChen 0:c7bcc0b36b5e 79 Ticker ticker;
silviaChen 0:c7bcc0b36b5e 80 ticker.attach(periodicCallback, 1); // blink LED every second
silviaChen 0:c7bcc0b36b5e 81
silviaChen 0:c7bcc0b36b5e 82 BLE& ble = BLE::Instance(BLE::DEFAULT_INSTANCE);
silviaChen 0:c7bcc0b36b5e 83 ble.init(bleInitComplete);
silviaChen 0:c7bcc0b36b5e 84
silviaChen 0:c7bcc0b36b5e 85 /* SpinWait for initialization to complete. This is necessary because the
silviaChen 0:c7bcc0b36b5e 86 * BLE object is used in the main loop below. */
silviaChen 0:c7bcc0b36b5e 87 while (ble.hasInitialized() == false) { /* spin loop */ }
silviaChen 0:c7bcc0b36b5e 88
tsungta 1:82331af3e4c9 89 ble.setTxPower(0);
tsungta 1:82331af3e4c9 90
silviaChen 0:c7bcc0b36b5e 91 // infinite loop
silviaChen 0:c7bcc0b36b5e 92 while (1) {
silviaChen 0:c7bcc0b36b5e 93 // check for trigger from periodicCallback()
silviaChen 0:c7bcc0b36b5e 94 if (triggerSensorPolling && ble.getGapState().connected) {
silviaChen 0:c7bcc0b36b5e 95 triggerSensorPolling = false;
silviaChen 0:c7bcc0b36b5e 96
silviaChen 0:c7bcc0b36b5e 97 // Do blocking calls or whatever is necessary for sensor polling.
silviaChen 0:c7bcc0b36b5e 98 // In our case, we simply update the HRM measurement.
silviaChen 0:c7bcc0b36b5e 99 hrmCounter++;
silviaChen 0:c7bcc0b36b5e 100 if (hrmCounter == 175) { // 100 <= HRM bps <=175
silviaChen 0:c7bcc0b36b5e 101 hrmCounter = 100;
silviaChen 0:c7bcc0b36b5e 102 }
silviaChen 0:c7bcc0b36b5e 103
silviaChen 0:c7bcc0b36b5e 104 hrService->updateHeartRate(hrmCounter);
silviaChen 0:c7bcc0b36b5e 105 } else {
silviaChen 0:c7bcc0b36b5e 106 ble.waitForEvent(); // low power wait for event
silviaChen 0:c7bcc0b36b5e 107 }
silviaChen 0:c7bcc0b36b5e 108 }
silviaChen 0:c7bcc0b36b5e 109 }