
hr with 30102
Dependencies: BLE_API mbed X_NUCLEO_IDB0XA1
Fork of BLE_HeartRate by
HeartRateService.h
- Committer:
- rgrover1
- Date:
- 2014-08-22
- Revision:
- 39:6390604f904c
- Child:
- 41:9cef0129da5f
File content as of revision 39:6390604f904c:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 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. */ #ifndef __BLE_HEART_RATE_SERVICE_H__ #define __BLE_HEART_RATE_SERVICE_H__ #include "BLEDevice.h" /* Heart Rate Service */ /* Service: https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.heart_rate.xml */ /* HRM Char: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml */ /* Location: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.body_sensor_location.xml */ class HeartRateService { public: static const unsigned BLE_HRS_BODY_SENSOR_LOCATION_OTHER = 0; static const unsigned BLE_HRS_BODY_SENSOR_LOCATION_CHEST = 1; static const unsigned BLE_HRS_BODY_SENSOR_LOCATION_WRIST = 2; static const unsigned BLE_HRS_BODY_SENSOR_LOCATION_FINGER = 3; static const unsigned BLE_HRS_BODY_SENSOR_LOCATION_HAND = 4; static const unsigned BLE_HRS_BODY_SENSOR_LOCATION_EAR_LOBE = 5; static const unsigned BLE_HRS_BODY_SENSOR_LOCATION_FOOT = 6; public: HeartRateService(BLEDevice &_ble, uint8_t _hrmCounter, uint8_t _location) : ble(_ble), bpm(_hrmCounter), hrmRate(GattCharacteristic::UUID_HEART_RATE_MEASUREMENT_CHAR, bpm.getPointer(), HeartRateValueBytes::SIZEOF_ARRAY, HeartRateValueBytes::SIZEOF_ARRAY, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY), hrmLocation(GattCharacteristic::UUID_BODY_SENSOR_LOCATION_CHAR, (uint8_t *)&_location, sizeof(_location), sizeof(_location), GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ) { static bool serviceAdded = false; /* We should only ever need to add the heart rate service once. */ if (serviceAdded) { return; } GattCharacteristic *hrmChars[] = {&hrmRate, &hrmLocation, }; GattService hrmService(GattService::UUID_HEART_RATE_SERVICE, hrmChars, sizeof(hrmChars) / sizeof(GattCharacteristic *)); ble.addService(hrmService); serviceAdded = true; } void updateHeartRate(uint8_t hrmCounter) { if (ble.getGapState().connected) { bpm.updateHeartRate(hrmCounter); ble.updateCharacteristicValue(hrmRate.getHandle(), bpm.getPointer(), HeartRateValueBytes::SIZEOF_ARRAY); } } private: /* Private internal representation for the bytes used to work with the vaulue of the heart-rate characteristic. */ struct HeartRateValueBytes { static const unsigned SIZEOF_ARRAY = 2; HeartRateValueBytes(uint8_t hrmCounter) : beatsPerMinute() { updateHeartRate(hrmCounter); } void updateHeartRate(uint8_t hrmCounter) { beatsPerMinute[1] = hrmCounter; } uint8_t *getPointer(void) { return beatsPerMinute; } const uint8_t *getPointer(void) const { return beatsPerMinute; } /* First byte = 8-bit values, no extra info, Second byte = uint8_t HRM value */ /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml */ uint8_t beatsPerMinute[SIZEOF_ARRAY]; }; private: BLEDevice &ble; HeartRateValueBytes bpm; GattCharacteristic hrmRate; GattCharacteristic hrmLocation; }; #endif /* #ifndef __BLE_HEART_RATE_SERVICE_H__*/