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/*
* MIT License
*
* Copyright (c) 2021 Joey Castillo
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _WATCH_UTILITY_H_INCLUDED
#define _WATCH_UTILITY_H_INCLUDED
////< @file watch_utility.h
#include "watch.h"
/** @addtogroup utility Utility Functions
* @brief This section covers various useful functions that don't fit anywhere else.
**/
/// @{
/** @brief Returns a two-letter weekday for the given timestamp, suitable for display
* in positions 0-1 of the watch face
* @param date_time The watch_date_time whose weekday you want.
*/
const char * watch_utility_get_weekday(watch_date_time date_time);
/** @brief Returns a temperature in degrees Celsius for a given thermistor voltage divider circuit.
* @param value The raw analog reading from the thermistor pin (0-65535)
* @param highside True if the thermistor is connected to VCC and the series resistor is connected
* to GND; false if the thermistor is connected to GND and the series resistor is
* connected to VCC.
* @param b_coefficient From your thermistor's data sheet, the B25/85 coefficient. A typical value
* will be between 2000 and 5000.
* @param nominal_temperature From your thermistor's data sheet, the temperature (in Celsius) at
* which the thermistor's resistance is at its nominal value.
* @param nominal_resistance The thermistor's resistance at the nominal temperature.
* @param series_resistance The value of the other resistor in the voltage divider.
* @note Ported from Adafruit's MIT-licensed CircuitPython thermistor code, (c) 2017 Scott Shawcroft:
* https://github.com/adafruit/Adafruit_CircuitPython_Thermistor/blob/main/adafruit_thermistor.py
*/
float watch_utility_thermistor_temperature(uint16_t value, bool highside, float b_coefficient, float nominal_temperature, float nominal_resistance, float series_resistance);
#endif
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