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 "dbusactiveread.hpp"
18 
19 #include "dbushelper_interface.hpp"
20 #include "util.hpp"
21 
22 #include <chrono>
23 #include <cmath>
24 #include <iostream>
25 
26 namespace pid_control
27 {
28 
29 ReadReturn DbusActiveRead::read(void)
30 {
31     struct SensorProperties settings;
32     double value;
33 
34     _helper->getProperties(_service, _path, &settings);
35 
36     value = settings.value * pow(10, settings.scale);
37 
38     /*
39      * Technically it might not be a value from now, but there's no timestamp
40      * on Sensor.Value yet.
41      */
42     struct ReadReturn r = {value, std::chrono::high_resolution_clock::now()};
43 
44     return r;
45 }
46 
47 } // namespace pid_control
48