| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef GARNET_EXAMPLES_BLUETOOTH_BT_LE_HEART_RATE_PERIPHERAL_SERVICE_H_ |
| #define GARNET_EXAMPLES_BLUETOOTH_BT_LE_HEART_RATE_PERIPHERAL_SERVICE_H_ |
| |
| #include <unordered_set> |
| |
| #include <fuchsia/bluetooth/gatt/cpp/fidl.h> |
| #include <lib/fidl/cpp/binding.h> |
| #include <lib/fidl/cpp/string.h> |
| #include <lib/fidl/cpp/vector.h> |
| #include <lib/fxl/memory/weak_ptr.h> |
| |
| namespace bt_le_heart_rate { |
| |
| class HeartModel; |
| |
| class Service final : fuchsia::bluetooth::gatt::LocalServiceDelegate { |
| public: |
| // See assigned numbers for GATT services and characteristics. |
| // https://www.bluetooth.com/specifications/gatt/services |
| // https://www.bluetooth.com/specifications/gatt/characteristics |
| static constexpr char kServiceUuid[] = "0000180d-0000-1000-8000-00805f9b34fb"; |
| static constexpr uint64_t kHeartRateMeasurementId = 0; |
| static constexpr char kHeartRateMeasurementUuid[] = |
| "00002a37-0000-1000-8000-00805f9b34fb"; |
| static constexpr uint64_t kBodySensorLocationId = 1; |
| static constexpr char kBodySensorLocationUuid[] = |
| "00002a38-0000-1000-8000-00805f9b34fb"; |
| static constexpr uint64_t kHeartRateControlPointId = 2; |
| static constexpr char kHeartRateControlPointUuid[] = |
| "00002a39-0000-1000-8000-00805f9b34fb"; |
| |
| // See Assigned Numbers for Heart Rate Service |
| // https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.service.heart_rate.xml |
| static constexpr fuchsia::bluetooth::gatt::ErrorCode |
| CONTROL_POINT_NOT_SUPPORTED = |
| static_cast<fuchsia::bluetooth::gatt::ErrorCode>(0x80); |
| |
| // Heart Rate Service v1.0, 3.3.1 [Control Point] Characteristic Behavior. |
| static constexpr uint8_t kResetEnergyExpendedValue = 0x01; |
| |
| explicit Service(std::unique_ptr<HeartModel> heart_model); |
| ~Service() = default; |
| |
| void PublishService(fuchsia::bluetooth::gatt::ServerPtr* gatt_server); |
| |
| void set_measurement_interval(int msec) { measurement_interval_ = msec; } |
| |
| private: |
| void NotifyMeasurement(); |
| |
| void ScheduleNotification(); |
| |
| // Implement LocalServiceDelegate. |
| void OnCharacteristicConfiguration(uint64_t characteristic_id, |
| std::string peer_id, bool notify, |
| bool indicate) override; |
| void OnReadValue(uint64_t id, int32_t offset, |
| OnReadValueCallback callback) override; |
| void OnWriteValue(uint64_t id, uint16_t offset, |
| std::vector<uint8_t> value, |
| OnWriteValueCallback callback) override; |
| void OnWriteWithoutResponse(uint64_t id, uint16_t offset, |
| std::vector<uint8_t> value) override; |
| |
| std::unique_ptr<HeartModel> heart_model_; |
| fidl::Binding<fuchsia::bluetooth::gatt::LocalServiceDelegate> binding_; |
| fuchsia::bluetooth::gatt::LocalServicePtr service_; |
| |
| // Peers that have enabled measurement notifications. |
| std::unordered_set<std::string> measurement_peers_; |
| bool notify_scheduled_; |
| |
| // Interval of measurement notifications in milliseconds. |
| int measurement_interval_ = 2000; |
| |
| fxl::WeakPtrFactory<Service> weak_factory_; |
| }; |
| |
| // Interface for heart rate measurement sensors |
| class HeartModel { |
| public: |
| struct Measurement { |
| bool contact; // True if measured while sensor was in contact. |
| int rate; // Heart rate in beats per minute (BPM). |
| int energy_expended; // Energy expended since reset in kilojoules (kJ). |
| }; |
| |
| virtual ~HeartModel() {} |
| |
| virtual bool ReadMeasurement(Measurement* measurement) = 0; |
| |
| virtual void ResetEnergyExpended() = 0; |
| }; |
| |
| enum class BodySensorLocation : uint8_t { |
| kOther = 0, |
| kChest = 1, |
| kWrist = 2, |
| kFinger = 3, |
| kHand = 4, |
| kEarLobe = 5, |
| kFoot = 6, |
| }; |
| |
| } // namespace bt_le_heart_rate |
| |
| #endif // GARNET_EXAMPLES_BLUETOOTH_BT_LE_HEART_RATE_PERIPHERAL_SERVICE_H_ |