1 /** 2 * Copyright 2017 Google Inc. 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 #include "sysfs/sysfsread.hpp" 18 19 #include "interfaces.hpp" 20 21 #include <chrono> 22 #include <cstdint> 23 #include <fstream> 24 #include <iostream> 25 26 namespace pid_control 27 { 28 29 ReadReturn SysFsRead::read(void) 30 { 31 int64_t value; 32 std::ifstream ifs; 33 34 ifs.open(_path); 35 ifs >> value; 36 ifs.close(); 37 38 ReadReturn r = {static_cast<double>(value), 39 std::chrono::high_resolution_clock::now()}; 40 41 return r; 42 } 43 44 } // namespace pid_control 45