1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROIDCONTEXTHUB_H_ 18 #define ANDROIDCONTEXTHUB_H_ 19 20 #include "contexthub.h" 21 22 #include <poll.h> 23 #include <unistd.h> 24 25 namespace android { 26 27 /* 28 * Communicates with a context hub via the /dev/nanohub interface 29 */ 30 class AndroidContextHub : public ContextHub { 31 public: 32 ~AndroidContextHub(); 33 34 // Performs system resource cleanup in the event that the program is 35 // terminated abnormally (via std::terminate) 36 static void TerminateHandler(); 37 38 bool Initialize() override; 39 bool LoadCalibration() override; 40 void SetLoggingEnabled(bool logging_enabled) override; 41 42 protected: 43 ContextHub::TransportResult WriteEvent( 44 const std::vector<uint8_t>& request) override; 45 ContextHub::TransportResult ReadEvent(std::vector<uint8_t>& response, 46 int timeout_ms) override; 47 bool FlashSensorHub(const std::vector<uint8_t>& bytes) override; 48 49 bool SetCalibration(SensorType sensor_type, int32_t data) override; 50 bool SetCalibration(SensorType sensor_type, float data) override; 51 bool SetCalibration(SensorType sensor_type, int32_t x, int32_t y, int32_t z) 52 override; 53 bool SetCalibration(SensorType sensor_type, int32_t x, int32_t y, 54 int32_t z, int32_t w) override; 55 bool SaveCalibration() override; 56 57 private: 58 int sensor_fd_ = -1; 59 int comms_fd_ = -1; 60 61 ContextHub::TransportResult ReadEventFromFd(int fd, 62 std::vector<uint8_t>& message); 63 int ResetPollFds(struct pollfd *pfds, size_t count); 64 static const char *SensorTypeToCalibrationKey(SensorType sensor_type); 65 }; 66 67 } // namespace android 68 69 #endif // ANDROIDCONTEXTHUB_H_ 70