1 
2 /*
3 // Copyright (c) 2018 Intel Corporation
4 //
5 // Licensed under the Apache License, Version 2.0 (the "License");
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
8 //
9 //      http://www.apache.org/licenses/LICENSE-2.0
10 //
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
16 */
17 
18 #pragma once
19 
20 #include <cstddef>
21 #include <vector>
22 
23 namespace pid_control
24 {
25 namespace ec
26 {
27 constexpr size_t maxStepwisePoints = 20;
28 
29 struct StepwiseInfo
30 {
31     double ts; // sample time in seconds
32     double reading[maxStepwisePoints];
33     double output[maxStepwisePoints];
34     double positiveHysteresis;
35     double negativeHysteresis;
36     bool isCeiling;
37 };
38 
39 double stepwise(const ec::StepwiseInfo& info, double value);
40 
41 } // namespace ec
42 } // namespace pid_control
43