ntc_lookup_table.hpp

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#pragma once
#include <cstddef>
#include <cstdint>
 
namespace NTC {
 
//--------------------------------------
//  Lookup Table Entry
//--------------------------------------
 
struct ntc_lookup_entry_t {
  float resistance_ohms;     
  float temperature_celsius; 
};
 
//--------------------------------------
//  Lookup Table Structure
//--------------------------------------
 
struct ntc_lookup_table_t {
  const ntc_lookup_entry_t *entries; 
  size_t entry_count;                
  float min_resistance;              
  float max_resistance;              
  float min_temperature;             
  float max_temperature;             
  float resistance_step;             
};
 
//--------------------------------------
//  Lookup Table Functions
//--------------------------------------
 
const ntc_lookup_table_t *GetNtcLookupTable(int ntc_type) noexcept;
 
bool FindTemperatureFromLookupTable(const ntc_lookup_table_t *table,
                                    float resistance_ohms,
                                    float *temperature_celsius) noexcept;
 
bool FindResistanceFromLookupTable(const ntc_lookup_table_t *table,
                                   float temperature_celsius,
                                   float *resistance_ohms) noexcept;
 
bool InterpolateLookupEntries(const ntc_lookup_entry_t &entry1,
                              const ntc_lookup_entry_t &entry2,
                              float resistance_ohms,
                              float *temperature_celsius) noexcept;
 
bool BinarySearchLookupTable(const ntc_lookup_table_t *table,
                             float resistance_ohms, size_t *lower_index,
                             size_t *upper_index) noexcept;
 
bool ValidateLookupTable(const ntc_lookup_table_t *table) noexcept;
 
void GetLookupTableStats(const ntc_lookup_table_t *table, float *min_resistance,
                         float *max_resistance, float *min_temperature,
                         float *max_temperature, size_t *entry_count) noexcept;
 
//--------------------------------------
//  NTCG163JFT103FT1S Lookup Table
//--------------------------------------
 
const ntc_lookup_table_t *GetNtcG163Jft103Ft1sLookupTable() noexcept;
 
//--------------------------------------
//  NTCG164JF103FT1S Lookup Table
//--------------------------------------
 
const ntc_lookup_table_t *GetNtcG164Jf103Ft1sLookupTable() noexcept;
 
//--------------------------------------
//  NTCG163JF103FT1S Lookup Table
//--------------------------------------
 
const ntc_lookup_table_t *GetNtcG163Jf103Ft1sLookupTable() noexcept;
 
} // namespace NTC