Ben Zhang / Mbed 2 deprecated BLE_API_DEMO

A simple demo that directly uses BLE library to define service and characteristics

Dependencies:   BLE_API mbed nRF51822

Fork of BLE_HeartRate by Bluetooth Low Energy

HeartRateService.h@41:9cef0129da5f, 2014-09-02 (annotated)

Committer:
rgrover1
Date:
Tue Sep 02 16:17:18 2014 +0000
Revision:
41:9cef0129da5f
Parent:
39:6390604f904c 
updated underlying libraries

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 39:6390604f904c 1 /* mbed Microcontroller Library
rgrover1 39:6390604f904c 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 39:6390604f904c 3 *
rgrover1 39:6390604f904c 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 39:6390604f904c 5 * you may not use this file except in compliance with the License.
rgrover1 39:6390604f904c 6 * You may obtain a copy of the License at
rgrover1 39:6390604f904c 7 *
rgrover1 39:6390604f904c 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 39:6390604f904c 9 *
rgrover1 39:6390604f904c 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 39:6390604f904c 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 39:6390604f904c 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 39:6390604f904c 13 * See the License for the specific language governing permissions and
rgrover1 39:6390604f904c 14 * limitations under the License.
rgrover1 39:6390604f904c 15 */
rgrover1 39:6390604f904c 16
rgrover1 39:6390604f904c 17 #ifndef __BLE_HEART_RATE_SERVICE_H__
rgrover1 39:6390604f904c 18 #define __BLE_HEART_RATE_SERVICE_H__
rgrover1 39:6390604f904c 19
rgrover1 39:6390604f904c 20 #include "BLEDevice.h"
rgrover1 39:6390604f904c 21
rgrover1 39:6390604f904c 22 /* Heart Rate Service */
rgrover1 39:6390604f904c 23 /* Service: https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.heart_rate.xml */
rgrover1 39:6390604f904c 24 /* HRM Char: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml */
rgrover1 39:6390604f904c 25 /* Location: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.body_sensor_location.xml */
rgrover1 39:6390604f904c 26 class HeartRateService {
rgrover1 39:6390604f904c 27 public:
rgrover1 41:9cef0129da5f 28 enum {
rgrover1 41:9cef0129da5f 29 LOCATION_OTHER = 0,
rgrover1 41:9cef0129da5f 30 LOCATION_CHEST,
rgrover1 41:9cef0129da5f 31 LOCATION_WRIST,
rgrover1 41:9cef0129da5f 32 LOCATION_FINGER,
rgrover1 41:9cef0129da5f 33 LOCATION_HAND,
rgrover1 41:9cef0129da5f 34 LOCATION_EAR_LOBE,
rgrover1 41:9cef0129da5f 35 LOCATION_FOOT,
rgrover1 41:9cef0129da5f 36 };
rgrover1 39:6390604f904c 37
rgrover1 39:6390604f904c 38 public:
rgrover1 39:6390604f904c 39 HeartRateService(BLEDevice &_ble, uint8_t _hrmCounter, uint8_t _location) :
rgrover1 39:6390604f904c 40 ble(_ble),
rgrover1 39:6390604f904c 41 bpm(_hrmCounter),
rgrover1 39:6390604f904c 42 hrmRate(GattCharacteristic::UUID_HEART_RATE_MEASUREMENT_CHAR, bpm.getPointer(), HeartRateValueBytes::SIZEOF_ARRAY, HeartRateValueBytes::SIZEOF_ARRAY,
rgrover1 39:6390604f904c 43 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY),
rgrover1 39:6390604f904c 44 hrmLocation(GattCharacteristic::UUID_BODY_SENSOR_LOCATION_CHAR, (uint8_t *)&_location, sizeof(_location), sizeof(_location),
rgrover1 39:6390604f904c 45 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ) {
rgrover1 39:6390604f904c 46
rgrover1 39:6390604f904c 47 static bool serviceAdded = false; /* We should only ever need to add the heart rate service once. */
rgrover1 39:6390604f904c 48 if (serviceAdded) {
rgrover1 39:6390604f904c 49 return;
rgrover1 39:6390604f904c 50 }
rgrover1 39:6390604f904c 51
rgrover1 39:6390604f904c 52 GattCharacteristic *hrmChars[] = {&hrmRate, &hrmLocation, };
rgrover1 39:6390604f904c 53 GattService hrmService(GattService::UUID_HEART_RATE_SERVICE, hrmChars, sizeof(hrmChars) / sizeof(GattCharacteristic *));
rgrover1 39:6390604f904c 54
rgrover1 39:6390604f904c 55 ble.addService(hrmService);
rgrover1 39:6390604f904c 56 serviceAdded = true;
rgrover1 39:6390604f904c 57 }
rgrover1 39:6390604f904c 58
rgrover1 39:6390604f904c 59 void updateHeartRate(uint8_t hrmCounter) {
rgrover1 39:6390604f904c 60 if (ble.getGapState().connected) {
rgrover1 39:6390604f904c 61 bpm.updateHeartRate(hrmCounter);
rgrover1 41:9cef0129da5f 62 ble.updateCharacteristicValue(hrmRate.getValueAttribute().getHandle(), bpm.getPointer(), HeartRateValueBytes::SIZEOF_ARRAY);
rgrover1 39:6390604f904c 63 }
rgrover1 39:6390604f904c 64 }
rgrover1 39:6390604f904c 65
rgrover1 39:6390604f904c 66 private:
rgrover1 39:6390604f904c 67 /* Private internal representation for the bytes used to work with the vaulue of the heart-rate characteristic. */
rgrover1 39:6390604f904c 68 struct HeartRateValueBytes {
rgrover1 39:6390604f904c 69 static const unsigned SIZEOF_ARRAY = 2;
rgrover1 39:6390604f904c 70
rgrover1 39:6390604f904c 71 HeartRateValueBytes(uint8_t hrmCounter) : beatsPerMinute() {
rgrover1 39:6390604f904c 72 updateHeartRate(hrmCounter);
rgrover1 39:6390604f904c 73 }
rgrover1 39:6390604f904c 74
rgrover1 39:6390604f904c 75 void updateHeartRate(uint8_t hrmCounter) {
rgrover1 39:6390604f904c 76 beatsPerMinute[1] = hrmCounter;
rgrover1 39:6390604f904c 77 }
rgrover1 39:6390604f904c 78
rgrover1 39:6390604f904c 79 uint8_t *getPointer(void) {
rgrover1 39:6390604f904c 80 return beatsPerMinute;
rgrover1 39:6390604f904c 81 }
rgrover1 39:6390604f904c 82
rgrover1 39:6390604f904c 83 const uint8_t *getPointer(void) const {
rgrover1 39:6390604f904c 84 return beatsPerMinute;
rgrover1 39:6390604f904c 85 }
rgrover1 39:6390604f904c 86
rgrover1 41:9cef0129da5f 87 private:
rgrover1 39:6390604f904c 88 /* First byte = 8-bit values, no extra info, Second byte = uint8_t HRM value */
rgrover1 39:6390604f904c 89 /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml */
rgrover1 39:6390604f904c 90 uint8_t beatsPerMinute[SIZEOF_ARRAY];
rgrover1 39:6390604f904c 91 };
rgrover1 39:6390604f904c 92
rgrover1 39:6390604f904c 93 private:
rgrover1 39:6390604f904c 94 BLEDevice &ble;
rgrover1 39:6390604f904c 95 HeartRateValueBytes bpm;
rgrover1 39:6390604f904c 96 GattCharacteristic hrmRate;
rgrover1 39:6390604f904c 97 GattCharacteristic hrmLocation;
rgrover1 39:6390604f904c 98 };
rgrover1 39:6390604f904c 99
rgrover1 39:6390604f904c 100 #endif /* #ifndef __BLE_HEART_RATE_SERVICE_H__*/