52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
/* Reflow Oven Controller
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*
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* Copyright (C) 2020 Mario Hüttel <mario.huettel@gmx.net>
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*
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* This file is part of the Reflow Oven Controller Project.
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*
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* The reflow oven controller is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* The Reflow Oven Control Firmware is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the reflow oven controller project.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __PID_CONTROLLER_H__
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#define __PID_CONTROLLER_H__
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struct pid_controller {
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float k_deriv;
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float k_int;
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float k_p;
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float k_int_t;
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float k_deriv_t;
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float k_inv_deriv_t;
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float output_sat_max;
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float output_sat_min;
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float integral_max;
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float sample_period;
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volatile float control_output;
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volatile float last_in;
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volatile float integral;
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volatile float derivate;
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};
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void pid_init(struct pid_controller *pid, float k_deriv, float k_int, float k_p, float output_sat_min, float output_sat_max, float integral_max, float sample_period);
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void pid_zero(struct pid_controller *pid);
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float pid_sample(struct pid_controller *pid, float deviation);
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float pid_get_control_output(const struct pid_controller *pid);
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int pid_copy(struct pid_controller *dest, const struct pid_controller *src);
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#endif /* __PID_CONTROLLER_H__ */
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