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/*
LUFA Library
Copyright (C) Dean Camera, 2009.
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
/*
Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, and distribute this software
and its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
/** \file
*
* Temperature sensor board driver for the USB boards which contain a temperature sensor.
*/
/** \ingroup Group_BoardDrivers
* @defgroup Group_Temperature Temperature Driver - LUFA/Drivers/Board/Temperature.h
*
* \section Sec_Dependencies Module Source Dependencies
* The following files must be built with any user project that uses this module:
* - LUFA/Drivers/Board/Temperature.c
*
* \section Module Description
* Temperature sensor driver. This provides an easy to use interface for the hardware temperature sensor located
* on many boards. It provides an interface to configure the sensor and appropriate ADC channel, plus read out the
* current temperature in degrees C. It is designed for and will only work with the temperature sensor located on the
* official Atmel USB AVR boards, as each sensor has different characteristics.
*
* @{
*/
#ifndef __TEMPERATURE_H__
#define __TEMPERATURE_H__
/* Macros: */
#if !defined(__DOXYGEN__)
#define INCLUDE_FROM_BOARD_DRIVER
#endif
/* Includes: */
#include <avr/pgmspace.h>
#include "../../Common/Common.h"
#include "../Peripheral/ADC.h"
#if !defined(BOARD)
#error BOARD must be set in makefile to a value specified in BoardTypes.h.
#elif (BOARD != BOARD_USBKEY) && (BOARD != BOARD_STK525) && (BOARD != BOARD_STK526) && (BOARD != BOARD_USER)
#error The selected board does not contain a temperature sensor.
#endif
/* Enable C linkage for C++ Compilers: */
#if defined(__cplusplus)
extern "C" {
#endif
/* Public Interface - May be used in end-application: */
/* Macros: */
/** ADC channel number for the temperature sensor. */
#define TEMP_ADC_CHANNEL 0
/** Minimum returnable temperature from the \ref Temperature_GetTemperature() function. */
#define TEMP_MIN_TEMP TEMP_TABLE_OFFSET
/** Maximum returnable temperature from the \ref Temperature_GetTemperature() function. */
#define TEMP_MAX_TEMP ((TEMP_TABLE_SIZE - 1) + TEMP_TABLE_OFFSET)
/* Pseudo-Function Macros: */
#if defined(__DOXYGEN__)
/** Initializes the temperature sensor driver, including setting up the appropriate ADC channel.
* This must be called before any other temperature sensor routines.
*
* The ADC itself (not the ADC channel) must be configured separately before calling the temperature
* sensor functions.
*/
static inline void Temperature_Init(void);
#else
#define Temperature_Init() ADC_SetupChannel(TEMP_ADC_CHANNEL);
#endif
/* Function Prototypes: */
/** Performs a complete ADC on the temperature sensor channel, and converts the result into a
* valid temperature between \ref TEMP_MIN_TEMP and \ref TEMP_MAX_TEMP in degrees Celsius.
*
* \return Signed temperature in degrees Celsius
*/
int8_t Temperature_GetTemperature(void) ATTR_WARN_UNUSED_RESULT;
/* Private Interface - For use in library only: */
#if !defined(__DOXYGEN__)
/* Macros: */
#define TEMP_TABLE_SIZE (sizeof(Temperature_Lookup) / sizeof(Temperature_Lookup[0]))
#define TEMP_TABLE_OFFSET -21
#endif
/* Disable C linkage for C++ Compilers: */
#if defined(__cplusplus)
}
#endif
#endif
/** @} */
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