1 #pragma once
2 
3 #include "ec/pid.hpp"
4 #include "fan.hpp"
5 #include "pidcontroller.hpp"
6 
7 #include <memory>
8 #include <string>
9 #include <vector>
10 
11 namespace pid_control
12 {
13 
14 /*
15  * A FanController is a PID controller that reads a number of fans and given
16  * the output then tries to set them to the goal values set by the thermal
17  * controllers.
18  */
19 class FanController : public PIDController
20 {
21   public:
22     static std::unique_ptr<PIDController>
23         createFanPid(ZoneInterface* owner, const std::string& id,
24                      const std::vector<std::string>& inputs,
25                      const ec::pidinfo& initial);
26 
27     FanController(const std::string& id, const std::vector<std::string>& inputs,
28                   ZoneInterface* owner) :
29         PIDController(id, owner),
30         _inputs(inputs), _direction(FanSpeedDirection::NEUTRAL)
31     {}
32 
33     double inputProc(void) override;
34     double setptProc(void) override;
35     void outputProc(double value) override;
36 
37     FanSpeedDirection getFanDirection(void) const
38     {
39         return _direction;
40     }
41 
42     void setFanDirection(FanSpeedDirection direction)
43     {
44         _direction = direction;
45     };
46 
47   private:
48     std::vector<std::string> _inputs;
49     FanSpeedDirection _direction;
50 
51     // Cosmetic only, to reduce frequency of repetitive messages
52     bool failsafeTransition = true;
53     bool failsafePrevState = false;
54 };
55 
56 } // namespace pid_control
57