119 lines
3.5 KiB
C
119 lines
3.5 KiB
C
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#ifndef __PM_PARAMS_H__
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#define __PM_PARAMS_H__
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#include "pm_config.h"
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#include <math.h>
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#include <stdio.h>
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/**
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* @brief Measurement mode enumeration for polarimeter
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*/
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typedef enum
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{
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PM_MEAS_MODE_OPTICAL_ROTATION, // Optical rotation mode
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PM_MEAS_MODE_SPECIFIC_ROTATION, // Specific rotation mode
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PM_MEAS_MODE_CONCENTRATION, // Concentration mode
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PM_MEAS_MODE_SUGAR_SCALE // International sugar scale mode
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} PM_MeasMode_t;
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/**
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* @brief Measurement parameters for polarimeter
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*/
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/* Break the parameters into three logical groups to make ownership and usage clearer.
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* This is a destructive refactor: code that previously accessed params-><field>
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* should be updated to use the relevant subgroup (config, measured, computed).
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*/
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typedef struct
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{
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/* Settings provided by user or configuration */
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float tube_length; /* dm */
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float wavelength; /* nm */
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PM_MeasMode_t mode; /* default measurement mode */
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} pm_config_t;
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typedef struct
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{
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/* Values read from sensors / user input */
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float zero_point; /* ° */
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float measured_value; /* ° */
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float temperature; /* °C */
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float concentration; /* g/100ml - used when known */
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float specific_rotation; /* ° - used when known */
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} pm_measured_t;
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typedef struct
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{
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float actual_rotation; /* ° */
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float specific_rotation; /* ° - computed or copied from measured */
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float concentration; /* g/100ml - computed or copied */
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float sugar_scale; /* °Z */
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} pm_computed_t;
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typedef struct
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{
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pm_config_t config;
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pm_measured_t measured;
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pm_computed_t computed;
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} pm_params_t;
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/* Function prototypes with pm_ prefix */
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/**
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* @brief Compute actual rotation: measured_value - zero_point
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* @param params Pointer to measurement parameters
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* @return Actual rotation in degrees (°)
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*/
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/* Recompute all derived fields from the current config + measured values */
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void pm_params_recompute(pm_params_t *params);
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/* Backwards-compatible helpers (wrap computed/measured access) */
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float pm_calculate_actual_rotation(pm_params_t *params);
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/**
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* @brief Compute specific rotation [α]
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* @param params Pointer to measurement parameters
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* @return Specific rotation ([α], °) or NAN on error
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*/
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float pm_calculate_specific_rotation(pm_params_t *params);
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/**
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* @brief Compute concentration from rotation and specific rotation
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* @param params Pointer to measurement parameters
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* @return Concentration in g/100mL or NAN on error
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*/
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float pm_calculate_concentration(pm_params_t *params);
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/**
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* @brief Compute international sugar scale (°Z) from rotation
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* @param params Pointer to measurement parameters
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* @return Sugar scale value (°Z)
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*/
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float pm_calculate_sugar_scale(pm_params_t *params);
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/**
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* @brief Calculate result based on selected measurement mode
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* @param params Pointer to measurement parameters
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* @return Computed result based on mode, or NAN on error
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*/
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float pm_calculate_measurement(pm_params_t *params);
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/**
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* @brief Get human-readable mode name
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* @param mode Measurement mode
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* @return Null-terminated string with mode name
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*/
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const char *pm_get_mode_name(PM_MeasMode_t mode);
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/**
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* @brief Print formatted measurement result to log/console
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* @param params Pointer to measurement parameters
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* @param result Computed result to print
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*/
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void pm_print_measurement_result(pm_params_t *params, float result);
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void pm_params_reset(pm_params_t *params);
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pm_params_t *pm_params_get_instance(void);
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void pm_params_init(pm_params_t *params);
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#endif // __PM_PARAMS_H__
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