reflow-oven-control-sw/stm-firmware/include/reflow-controller/temp-converter.h

/* Reflow Oven Controller
 *
 * Copyright (C) 2020  Mario Hüttel <mario.huettel@gmx.net>
 *
 * This file is part of the Reflow Oven Controller Project.
 *
 * The reflow oven controller is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * GDSII-Converter is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with the reflow oven controller project.
 * If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __TEMP_CONVERTER_H__
#define __TEMP_CONVERTER_H__

/**
 * @brief Convert PT1000 resistance to temperature in degrees celsius
 * @param resistance PT1000 resistance value
 * @param[out] temp_out Temperature output
 * @return 0 if ok, -1 if value is below conversion range, 1 if value is above conversion range,-1000 in case of pointer error
 */
int temp_converter_convert_resistance_to_temp(float resistance, float *temp_out);

/**
 * @brief Convert temperature to PT1000 resistance
 * @param temp Temperature in degrees celsius
 * @param[out] resistance_out Resistance value
 * @return 0 if ok, -1 if tmeperature is below the lookup table, 1 if value is above the lookup table, -1000 in case of a pointer error,
 *	   -100 if an internal error occured. This should never happen, if the lookup table is correct
 */
int temp_convertet_convert_temp_to_resistance(float temp, float *resistance_out);

#endif /* __TEMP_CONVERTER_H__ */