Make NTU Hackathon / Mbed 2 deprecated Program3_BLEHeartRate

Heart Rate Monitor example for the BLE

Dependencies:   BLE_API X_NUCLEO_IDB0XA1 mbed

Fork of BLE_HeartRate_IDB0XA1 by ST

main.cpp@13:227a0149b677, 2016-02-25 (annotated)

Committer:
apalmieri
Date:
Thu Feb 25 10:05:05 2016 +0000
Revision:
13:227a0149b677
Parent:
3:a51ca6313ad2
Child:
14:f715c13eb84f
Code cleaning

Who changed what in which revision?

UserRevisionLine numberNew contents of line
screamer 0:eb7f02ad28a7 1 /* mbed Microcontroller Library
screamer 0:eb7f02ad28a7 2 * Copyright (c) 2006-2015 ARM Limited
screamer 0:eb7f02ad28a7 3 *
screamer 0:eb7f02ad28a7 4 * Licensed under the Apache License, Version 2.0 (the "License");
screamer 0:eb7f02ad28a7 5 * you may not use this file except in compliance with the License.
screamer 0:eb7f02ad28a7 6 * You may obtain a copy of the License at
screamer 0:eb7f02ad28a7 7 *
screamer 0:eb7f02ad28a7 8 * http://www.apache.org/licenses/LICENSE-2.0
screamer 0:eb7f02ad28a7 9 *
screamer 0:eb7f02ad28a7 10 * Unless required by applicable law or agreed to in writing, software
screamer 0:eb7f02ad28a7 11 * distributed under the License is distributed on an "AS IS" BASIS,
screamer 0:eb7f02ad28a7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
screamer 0:eb7f02ad28a7 13 * See the License for the specific language governing permissions and
screamer 0:eb7f02ad28a7 14 * limitations under the License.
screamer 0:eb7f02ad28a7 15 */
screamer 0:eb7f02ad28a7 16
screamer 0:eb7f02ad28a7 17 #include "mbed.h"
screamer 0:eb7f02ad28a7 18 #include "ble/BLE.h"
screamer 0:eb7f02ad28a7 19 #include "ble/services/HeartRateService.h"
screamer 0:eb7f02ad28a7 20
apalmieri 13:227a0149b677 21 DigitalOut led1(LED1, 1);
screamer 0:eb7f02ad28a7 22
screamer 0:eb7f02ad28a7 23 const static char DEVICE_NAME[] = "HRM1";
apalmieri 13:227a0149b677 24 static const uint16_t uuid16_list[] = {GattService::UUID_HEART_RATE_SERVICE};
apalmieri 13:227a0149b677 25
screamer 0:eb7f02ad28a7 26 static volatile bool triggerSensorPolling = false;
screamer 0:eb7f02ad28a7 27
apalmieri 2:bc0c0d442a24 28 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
screamer 0:eb7f02ad28a7 29 {
apalmieri 13:227a0149b677 30 (void)params;
apalmieri 13:227a0149b677 31 BLE::Instance().gap().startAdvertising(); // restart advertising
screamer 0:eb7f02ad28a7 32 }
screamer 0:eb7f02ad28a7 33
screamer 0:eb7f02ad28a7 34 void periodicCallback(void)
screamer 0:eb7f02ad28a7 35 {
screamer 0:eb7f02ad28a7 36 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
screamer 0:eb7f02ad28a7 37 /* Note that the periodicCallback() executes in interrupt context, so it is safer to do
screamer 0:eb7f02ad28a7 38 * heavy-weight sensor polling from the main thread. */
screamer 0:eb7f02ad28a7 39 triggerSensorPolling = true;
screamer 0:eb7f02ad28a7 40 }
screamer 0:eb7f02ad28a7 41
apalmieri 13:227a0149b677 42 void onBleInitError(BLE &ble, ble_error_t error)
apalmieri 13:227a0149b677 43 {
apalmieri 13:227a0149b677 44 (void)ble;
apalmieri 13:227a0149b677 45 (void)error;
apalmieri 13:227a0149b677 46 /* Initialization error handling should go here */
apalmieri 13:227a0149b677 47 }
apalmieri 13:227a0149b677 48
apalmieri 13:227a0149b677 49 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
screamer 0:eb7f02ad28a7 50 {
apalmieri 13:227a0149b677 51 BLE& ble = params->ble;
apalmieri 13:227a0149b677 52 ble_error_t error = params->error;
screamer 0:eb7f02ad28a7 53
apalmieri 13:227a0149b677 54 if (error != BLE_ERROR_NONE) {
apalmieri 13:227a0149b677 55 onBleInitError(ble, error);
apalmieri 13:227a0149b677 56 return;
apalmieri 13:227a0149b677 57 }
apalmieri 13:227a0149b677 58
apalmieri 13:227a0149b677 59 if (ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
apalmieri 13:227a0149b677 60 return;
apalmieri 13:227a0149b677 61 }
apalmieri 13:227a0149b677 62
screamer 0:eb7f02ad28a7 63 ble.gap().onDisconnection(disconnectionCallback);
screamer 0:eb7f02ad28a7 64
screamer 0:eb7f02ad28a7 65 /* Setup primary service. */
screamer 0:eb7f02ad28a7 66 uint8_t hrmCounter = 100; // init HRM to 100bps
screamer 0:eb7f02ad28a7 67 HeartRateService hrService(ble, hrmCounter, HeartRateService::LOCATION_FINGER);
screamer 0:eb7f02ad28a7 68
screamer 0:eb7f02ad28a7 69 /* Setup advertising. */
screamer 0:eb7f02ad28a7 70 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
screamer 0:eb7f02ad28a7 71 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
screamer 0:eb7f02ad28a7 72 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_HEART_RATE_SENSOR);
screamer 0:eb7f02ad28a7 73 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
screamer 0:eb7f02ad28a7 74 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
screamer 0:eb7f02ad28a7 75 ble.gap().setAdvertisingInterval(1000); /* 1000ms */
screamer 0:eb7f02ad28a7 76 ble.gap().startAdvertising();
screamer 0:eb7f02ad28a7 77
screamer 0:eb7f02ad28a7 78 // infinite loop
apalmieri 13:227a0149b677 79 while (true) {
screamer 0:eb7f02ad28a7 80 // check for trigger from periodicCallback()
screamer 0:eb7f02ad28a7 81 if (triggerSensorPolling && ble.getGapState().connected) {
screamer 0:eb7f02ad28a7 82 triggerSensorPolling = false;
screamer 0:eb7f02ad28a7 83
screamer 0:eb7f02ad28a7 84 // Do blocking calls or whatever is necessary for sensor polling.
screamer 0:eb7f02ad28a7 85 // In our case, we simply update the HRM measurement.
screamer 0:eb7f02ad28a7 86 hrmCounter++;
screamer 0:eb7f02ad28a7 87
screamer 0:eb7f02ad28a7 88 // 100 <= HRM bps <=175
screamer 0:eb7f02ad28a7 89 if (hrmCounter == 175) {
screamer 0:eb7f02ad28a7 90 hrmCounter = 100;
screamer 0:eb7f02ad28a7 91 }
screamer 0:eb7f02ad28a7 92
screamer 0:eb7f02ad28a7 93 // update bps
screamer 0:eb7f02ad28a7 94 hrService.updateHeartRate(hrmCounter);
screamer 0:eb7f02ad28a7 95 } else {
screamer 0:eb7f02ad28a7 96 ble.waitForEvent(); // low power wait for event
screamer 0:eb7f02ad28a7 97 }
screamer 0:eb7f02ad28a7 98 }
screamer 0:eb7f02ad28a7 99 }
apalmieri 13:227a0149b677 100
apalmieri 13:227a0149b677 101 int main(void)
apalmieri 13:227a0149b677 102 {
apalmieri 13:227a0149b677 103 Ticker ticker;
apalmieri 13:227a0149b677 104 ticker.attach(periodicCallback, 1); // blink LED every second
apalmieri 13:227a0149b677 105
apalmieri 13:227a0149b677 106 BLE::Instance().init(bleInitComplete);
apalmieri 13:227a0149b677 107 }