1 /*
2 // Copyright (c) 2018 Intel Corporation
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 "stepwisecontroller.hpp"
18
19 #include "ec/stepwise.hpp"
20 #include "errors/exception.hpp"
21 #include "tuning.hpp"
22 #include "util.hpp"
23 #include "zone.hpp"
24
25 #include <algorithm>
26 #include <chrono>
27 #include <cmath>
28 #include <iostream>
29 #include <map>
30 #include <memory>
31 #include <thread>
32 #include <vector>
33
34 namespace pid_control
35 {
36
process(void)37 void StepwiseController::process(void)
38 {
39 // Get input value
40 double input = inputProc();
41
42 ec::StepwiseInfo info = getStepwiseInfo();
43
44 double output = lastOutput;
45
46 // Calculate new output if hysteresis allows
47 if (std::isnan(output))
48 {
49 output = ec::stepwise(info, input);
50 lastInput = input;
51 }
52 else if ((input - lastInput) > info.positiveHysteresis)
53 {
54 output = ec::stepwise(info, input);
55 lastInput = input;
56 }
57 else if ((lastInput - input) > info.negativeHysteresis)
58 {
59 output = ec::stepwise(info, input);
60 lastInput = input;
61 }
62
63 lastOutput = output;
64 // Output new value
65 outputProc(output);
66
67 return;
68 }
69
createStepwiseController(ZoneInterface * owner,const std::string & id,const std::vector<std::string> & inputs,const ec::StepwiseInfo & initial)70 std::unique_ptr<Controller> StepwiseController::createStepwiseController(
71 ZoneInterface* owner, const std::string& id,
72 const std::vector<std::string>& inputs, const ec::StepwiseInfo& initial)
73 {
74 // StepwiseController requires at least 1 input
75 if (inputs.empty())
76 {
77 throw ControllerBuildException("Stepwise controller missing inputs");
78 }
79
80 auto thermal = std::make_unique<StepwiseController>(id, inputs, owner);
81 thermal->setStepwiseInfo(initial);
82
83 return thermal;
84 }
85
inputProc(void)86 double StepwiseController::inputProc(void)
87 {
88 double value = std::numeric_limits<double>::lowest();
89 for (const auto& in : _inputs)
90 {
91 value = std::max(value, _owner->getCachedValue(in));
92 }
93
94 if (debugEnabled)
95 {
96 std::cerr << getID()
97 << " choose the maximum temperature value: " << value << "\n";
98 }
99
100 return value;
101 }
102
outputProc(double value)103 void StepwiseController::outputProc(double value)
104 {
105 if (getStepwiseInfo().isCeiling)
106 {
107 _owner->addRPMCeiling(value);
108 }
109 else
110 {
111 _owner->addSetPoint(value, _id);
112 if (debugEnabled)
113 {
114 std::cerr << getID() << " stepwise output pwm: " << value << "\n";
115 }
116 }
117 return;
118 }
119
120 } // namespace pid_control
121