diff options
Diffstat (limited to 'LUFA/Drivers/Board/Temperature.h')
| -rw-r--r-- | LUFA/Drivers/Board/Temperature.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/LUFA/Drivers/Board/Temperature.h b/LUFA/Drivers/Board/Temperature.h new file mode 100644 index 0000000000..f381cc92d9 --- /dev/null +++ b/LUFA/Drivers/Board/Temperature.h @@ -0,0 +1,147 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2017. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, 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 disclaims 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 + * \brief NTC Temperature Sensor board hardware driver. + * + * Master include file for the board temperature sensor driver, for the USB boards which contain a temperature sensor. + */ + +/** \ingroup Group_BoardDrivers + * \defgroup Group_Temperature Temperature Sensor Driver - LUFA/Drivers/Board/Temperature.h + * \brief NTC Temperature Sensor board hardware driver. + * + * \section Sec_Temperature_Dependencies Module Source Dependencies + * The following files must be built with any user project that uses this module: + * - LUFA/Drivers/Board/Temperature.c <i>(Makefile source module name: LUFA_SRC_TEMPERATURE)</i> + * + * \section Sec_Temperature_ModDescription 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. + * + * \section Sec_Temperature_ExampleUsage Example Usage + * The following snippet is an example of how this module may be used within a typical + * application. + * + * \code + * // Initialize the ADC and board temperature sensor drivers before first use + * ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_128); + * Temperature_Init(); + * + * // Display converted temperature in degrees Celsius + * printf("Current Temperature: %d Degrees\r\n", Temperature_GetTemperature()); + * \endcode + * + * @{ + */ + +#ifndef __TEMPERATURE_H__ +#define __TEMPERATURE_H__ + + /* Includes: */ + #include "../../Common/Common.h" + + /* Preprocessor Checks: */ + #if ((BOARD == BOARD_USBKEY) || (BOARD == BOARD_STK525) || \ + (BOARD == BOARD_STK526) || (BOARD == BOARD_EVK527)) + #define TEMPERATURE_SENSOR_DRIVER_COMPATIBLE + #endif + + #if !defined(__INCLUDE_FROM_TEMPERATURE_C) && !defined(TEMPERATURE_SENSOR_DRIVER_COMPATIBLE) + #error The selected board does not contain a compatible temperature sensor. + #endif + + #if defined(TEMPERATURE_SENSOR_DRIVER_COMPATIBLE) + + /* Includes: */ + #include "../Peripheral/ADC.h" + + /* 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 + + /** ADC channel MUX mask for the temperature sensor. */ + #define TEMP_ADC_CHANNEL_MASK ADC_CHANNEL0 + + /** Size of the temperature sensor lookup table, in lookup values */ + #define TEMP_TABLE_SIZE 120 + + /** Minimum returnable temperature from the \ref Temperature_GetTemperature() function. */ + #define TEMP_MIN_TEMP TEMP_TABLE_OFFSET_DEGREES + + /** Maximum returnable temperature from the \ref Temperature_GetTemperature() function. */ + #define TEMP_MAX_TEMP ((TEMP_TABLE_SIZE - 1) + TEMP_TABLE_OFFSET_DEGREES) + + /* Inline Functions: */ + /** Initializes the temperature sensor driver, including setting up the appropriate ADC channel. + * This must be called before any other temperature sensor routines. + * + * \pre The ADC itself (not the ADC channel) must be configured separately before calling the + * temperature sensor functions. + */ + static inline void Temperature_Init(void) ATTR_ALWAYS_INLINE; + static inline void Temperature_Init(void) + { + ADC_SetupChannel(TEMP_ADC_CHANNEL); + } + + /* 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 value 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_OFFSET_DEGREES -21 + #endif + + /* Disable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + } + #endif + + #endif + +#endif + +/** @} */ + |