/*
LUFA Library
Copyright (C) Dean Camera, 2010.
-
+
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
/*
Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
- Permission to use, copy, modify, distribute, and sell this
+ 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
+ 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
+ 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
*
* @{
*/
-
+
#ifndef __ADC_AVRU4U6U7_H__
#define __ADC_AVRU4U6U7_H__
/* Includes: */
#include "../../../Common/Common.h"
-
+
#include <avr/io.h>
#include <stdbool.h>
-
+
/* Enable C linkage for C++ Compilers: */
#if defined(__cplusplus)
extern "C" {
#endif
/* Public Interface - May be used in end-application: */
- /* Macros: */
+ /* Macros: */
/** Reference mask, for using the voltage present at the AVR's AREF pin for the ADC reference. */
#define ADC_REFERENCE_AREF 0
/** Reference mask, for using the internally generated 2.56V reference voltage as the ADC reference. */
#define ADC_REFERENCE_INT2560MV ((1 << REFS1) | (1 << REFS0))
-
+
/** Left-adjusts the 10-bit ADC result, so that the upper 8 bits of the value returned by the
* ADC_GetResult() macro contain the 8 most significant bits of the result. */
#define ADC_LEFT_ADJUSTED (1 << ADLAR)
/** Right-adjusts the 10-bit ADC result, so that the lower 8 bits of the value returned by the
* ADC_GetResult() macro contain the 8 least significant bits of the result. */
#define ADC_RIGHT_ADJUSTED (0 << ADLAR)
-
+
/** Sets the ADC mode to free running, so that conversions take place continuously as fast as the ADC
* is capable of at the given input clock speed. */
#define ADC_FREE_RUNNING (1 << ADATE)
/** Sets the ADC mode to single conversion, so that only a single conversion will take place before
* the ADC returns to idle. */
#define ADC_SINGLE_CONVERSION (0 << ADATE)
-
+
/** Sets the ADC input clock to prescale by a factor of 2 the AVR's system clock. */
#define ADC_PRESCALE_2 (1 << ADPS0)
/** Sets the ADC input clock to prescale by a factor of 128 the AVR's system clock. */
#define ADC_PRESCALE_128 ((1 << ADPS2) | (1 << ADPS1) | (1 << ADPS0))
-
+
//@{
/** MUX mask define for the ADC0 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading. */
#define ADC_CHANNEL0 (0x00 << MUX0)
/** MUX mask define for the internal 1.1V bandgap channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading. */
#define ADC_1100MV_BANDGAP (0x1E << MUX0)
-
+
#if (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__DOXYGEN__))
/** MUX mask define for the ADC8 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading.
*
#define ADC_INT_TEMP_SENS ((1 << 8) | (0x07 << MUX0))
#endif
//@}
-
+
/* Inline Functions: */
/** Configures the given ADC channel, ready for ADC conversions. This function sets the
* associated port pin as an input and disables the digital portion of the I/O to reduce
{
#if (defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__) || \
defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB647__) || \
- defined(__AVR_ATmega32U6__))
+ defined(__AVR_ATmega32U6__))
DDRF &= ~(1 << ChannelIndex);
DIDR0 |= (1 << ChannelIndex);
#elif (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__))
}
#endif
}
-
+
/** De-configures the given ADC channel, re-enabling digital I/O mode instead of analog. This
* function sets the associated port pin as an input and re-enabled the digital portion of
* the I/O.
{
#if (defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__) || \
defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB647__) || \
- defined(__AVR_ATmega32U6__))
+ defined(__AVR_ATmega32U6__))
DDRF &= ~(1 << ChannelIndex);
DIDR0 &= ~(1 << ChannelIndex);
#elif (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__))
static inline void ADC_StartReading(const uint16_t MUXMask)
{
ADMUX = MUXMask;
-
+
#if (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__DOXYGEN__))
if (MUXMask & (1 << 8))
ADCSRB |= (1 << MUX5);
else
ADCSRB &= ~(1 << MUX5);
#endif
-
+
ADCSRA |= (1 << ADSC);
}
{
return ((ADCSRA & (1 << ADIF)) ? true : false);
}
-
+
/** Retrieves the conversion value of the last completed ADC conversion and clears the reading
* completion flag.
*
static inline uint16_t ADC_GetChannelReading(const uint16_t MUXMask)
{
ADC_StartReading(MUXMask);
-
+
while (!(ADC_IsReadingComplete()));
-
+
return ADC_GetResult();
}
{
ADCSRA = 0;
}
-
+
/** Indicates if the ADC is currently enabled.
*
* \return Boolean true if the ADC subsystem is currently enabled, false otherwise.
{
return ((ADCSRA & (1 << ADEN)) ? true : false);
}
-
+
/* Disable C linkage for C++ Compilers: */
#if defined(__cplusplus)
}
#endif
-
+
#endif
/** @} */
+
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