-- This package is a collection of generic packages for modeling thermistors

-- Copyright (C)2017-2018, Philip Munts, President, Munts AM Corp.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are met:
--
-- * Redistributions of source code must retain the above copyright notice,
--   this list of conditions and the following disclaimer.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-- ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
-- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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WITH Ada.Numerics.Elementary_Functions; USE Ada.Numerics.Elementary_Functions;

PACKAGE BODY Thermistor IS

  -- Model an NTC thermistor with the B parameter equation

  PACKAGE BODY NTC_B_Parms IS

    FUNCTION T(R : Resistance.Ohms) RETURN Temperature.Kelvins IS

    BEGIN
      RETURN Temperature.Kelvins(B/log(Float(R)/(Float(R0)*exp(-B/Float(T0)))));
    END T;

  END NTC_B_Parms;

END Thermistor;