ATY_LIB/ALGO_Temperature_ATY.c

/**
* @file ALGO_Temperature_ATY.c
*
* @param Project ALGO_Algorithm_ATY_LIB
*
* @author ATY
*
* @copyright
*       - Copyright 2017 - 2023 MZ-ATY
*       - This code follows:
*           - MZ-ATY Various Contents Joint Statement -
*               <a href="https://mengze.top/MZ-ATY_VCJS">
*                        https://mengze.top/MZ-ATY_VCJS</a>
*           - CC 4.0 BY-NC-SA -
*               <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/">
*                        https://creativecommons.org/licenses/by-nc-sa/4.0/</a>
*       - Your use will be deemed to have accepted the terms of this statement.
*
* @brief Familiar functions of NTC or others temperature calc
*
* @version
*       - 1_01_230107 > ATY
*           -# Preliminary version, first Release
********************************************************************************
*/

#ifndef __ALGO_Temperature_ATY_C
#define __ALGO_Temperature_ATY_C

#include "ALGO_Temperature_ATY.h"

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/******************************************************************************/

/**
 * @brief   Calculate temperature from ntc resistance
 * @param   Rntc Current NTC resistance value
 * @param   R25 NTC standard resistance value at 25C
 * @param   B B value of NTC
 * @return  Current temperature in Celsius
 * @note    T25: Kelvin temperature at 25C = 298.15 = ALGO_TEMP_CtoT(25)
 *          R25: NTC standard resistance value at 25C like 10K,5K,100K...
 *          B: B value of NTC like 3435,3950...
 *          Rntc: Current NTC resistance value
 *          Tn: Actual Kelvin temperature(Cn = Tn-273.15)
 *          B = (lnR25 - lnRntc)/(1/T25 - 1/Tn)
 */
float ALGO_ResToKelvinTemp(float Rntc, float R25, float B)
{
    float Tn = 0.0;
    float Cn = 0.0;

    float temp_f[2];

    temp_f[0] = (ALGO_MATH_LogLn(R25) - ALGO_MATH_LogLn(Rntc)) / B;
    temp_f[1] = (1 / ALGO_TEMP_CtoT(25)) - temp_f[0];
    Tn = 1 / temp_f[1];
    Cn = ALGO_TEMP_TtoC(Tn);

    return Cn;
}

/**
 * @brief   Calculate temperature from ntc resistance
 * @param   vADC ADC voltage in mV
 * @param   vRef NTC ref voltage in mV
 * @param   rRefK ref resistance in kOhm
 * @param   R25 NTC standard resistance value at 25C
 * @param   B B value of NTC
 * @param   rRefPos ref res psition, 1 for pull up, 0 for pull down(for ntc)
 * @return  Current temperature in Celsius
 * @note    T25: Kelvin temperature at 25C = 298.15 = ALGO_TEMP_CtoT(25)
 *          R25: NTC standard resistance value at 25C like 10K,5K,100K...
 *          B: B value of NTC like 3435,3950...
 *          Rntc: Current NTC resistance value
 *          Tn: Actual Kelvin temperature(Cn = Tn-273.15)
 *          B = (lnR25 - lnRntc)/(1/T25 - 1/Tn)
 */
float ALGO_VolToKelvinTemp(float vADC, float vRef, float rRefK, float R25, float B, uint8_t rRefPos)
{
    if(rRefPos == 1){
        return ALGO_ResToKelvinTemp(ALGO_VoltageToResDown(vADC, vRef, rRefK), R25, B);
    }
    else{
        return ALGO_ResToKelvinTemp(ALGO_VoltageToResUp(vADC, vRef, rRefK), R25, B);
    }
}


// resultTemp = ALGO_ResToKelvinTemp(ALGO_VoltageToResDown(resultTemp, vref_t, 10), 1, 3200);


#endif /* __ALGO_Temperature_ATY_C */

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