/*
LUFA Library
- Copyright (C) Dean Camera, 2010.
+ Copyright (C) Dean Camera, 2011.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2011 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
* \note This file should not be included directly. It is automatically included as needed by the ADC driver
* dispatch header located in LUFA/Drivers/Peripheral/ADC.h.
*
+ * \section Sec_ExampleUsage Example Usage
+ * The following snippet is an example of how this module may be used within a typical
+ * application.
+ *
+ * \code
+ * // Initialise the ADC driver before first use
+ * ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_32);
+ *
+ * // Must setup the ADC channel to read beforehand
+ * ADC_SetupChannel(1);
+ *
+ * // Perform a single conversion of the ADC channel 1
+ * ADC_GetChannelReading(ADC_REFERENCE_AVCC | ADC_RIGHT_ADJUSTED | ADC_CHANNEL1);
+ * printf("Conversion Result: %d\r\n", ADC_GetResult());
+ *
+ * // Start reading ADC channel 1 in free running (continuous conversion) mode
+ * ADC_StartReading(ADC_REFERENCE_AVCC | ADC_RIGHT_ADJUSTED | ADC_CHANNEL1);
+ * while (!(ADC_IsReadingComplete())) {};
+ * printf("Conversion Result: %d\r\n", ADC_GetResult());
+ * \endcode
+ *
* @{
*/
#error Do not include this file directly. Include LUFA/Drivers/Peripheral/ADC.h instead.
#endif
+ /* Private Interface - For use in library only: */
+ #if !defined(__DOXYGEN__)
+ /* Macros: */
+ #define _ADC_GET_MUX_MASK2(y) ADC_CHANNEL ## y
+ #define _ADC_GET_MUX_MASK(y) _ADC_GET_MUX_MASK2(y)
+ #endif
+
/* Public Interface - May be used in end-application: */
/* Macros: */
+ /** \name ADC Reference Configuration Masks */
+ //@{
/** 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))
-
+ //@}
+
+ /** \name ADC Result Adjustment Configuration Masks */
+ //@{
/** 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.
+ * \ref 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.
+ * \ref ADC_GetResult() macro contain the 8 least significant bits of the result.
*/
#define ADC_RIGHT_ADJUSTED (0 << ADLAR)
+ //@}
+ /** \name ADC Mode Configuration Masks */
+ //@{
/** 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.
*/
* the ADC returns to idle.
*/
#define ADC_SINGLE_CONVERSION (0 << ADATE)
-
+ //@}
+
+ /** \name ADC Prescaler Configuration Masks */
+ //@{
/** 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))
+ //@}
+ /** \name ADC MUX Masks */
//@{
- /** MUX mask define for the ADC0 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading. */
+ /** 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 ADC1 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading. */
+ /** MUX mask define for the ADC1 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading(). */
#define ADC_CHANNEL1 (0x01 << MUX0)
#if !(defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__DOXYGEN__))
- /** MUX mask define for the ADC2 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading.
+ /** MUX mask define for the ADC2 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
*
* \note Not available on all AVR models.
*/
#define ADC_CHANNEL2 (0x02 << MUX0)
- /** MUX mask define for the ADC3 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading.
+ /** MUX mask define for the ADC3 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
*
* \note Not available on all AVR models.
*/
#define ADC_CHANNEL3 (0x03 << MUX0)
#endif
- /** MUX mask define for the ADC4 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading. */
+ /** MUX mask define for the ADC4 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading(). */
#define ADC_CHANNEL4 (0x04 << MUX0)
- /** MUX mask define for the ADC5 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading. */
+ /** MUX mask define for the ADC5 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading(). */
#define ADC_CHANNEL5 (0x05 << MUX0)
- /** MUX mask define for the ADC6 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading. */
+ /** MUX mask define for the ADC6 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading(). */
#define ADC_CHANNEL6 (0x06 << MUX0)
/** MUX mask define for the ADC7 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading. */
#define ADC_CHANNEL7 (0x07 << MUX0)
- /** MUX mask define for the internal 1.1V bandgap channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading. */
+ /** 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.
+ /** MUX mask define for the ADC8 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
*
* \note Not available on all AVR models.
*/
#define ADC_CHANNEL8 ((1 << 8) | (0x00 << MUX0))
- /** MUX mask define for the ADC9 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading.
+ /** MUX mask define for the ADC9 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
*
* \note Not available on all AVR models.
*/
#define ADC_CHANNEL9 ((1 << 8) | (0x01 << MUX0))
- /** MUX mask define for the ADC10 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading.
+ /** MUX mask define for the ADC10 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
*
* \note Not available on all AVR models.
*/
#define ADC_CHANNEL10 ((1 << 8) | (0x02 << MUX0))
- /** MUX mask define for the ADC11 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading.
+ /** MUX mask define for the ADC11 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
*
* \note Not available on all AVR models.
*/
#define ADC_CHANNEL11 ((1 << 8) | (0x03 << MUX0))
- /** MUX mask define for the ADC12 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading.
+ /** MUX mask define for the ADC12 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
*
* \note Not available on all AVR models.
*/
#define ADC_CHANNEL12 ((1 << 8) | (0x04 << MUX0))
- /** MUX mask define for the ADC13 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading.
+ /** MUX mask define for the ADC13 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
*
* \note Not available on all AVR models.
*/
#define ADC_CHANNEL13 ((1 << 8) | (0x05 << MUX0))
- /** MUX mask define for the internal temperature sensor channel of the ADC. See \ref ADC_StartReading and
- * \ref ADC_GetChannelReading.
+ /** MUX mask define for the internal temperature sensor channel of the ADC. See \ref ADC_StartReading() and
+ * \ref ADC_GetChannelReading().
*
* \note Not available on all AVR models.
*/
#define ADC_INT_TEMP_SENS ((1 << 8) | (0x07 << MUX0))
#endif
+
+ /** Retrieves the ADC MUX mask for the given ADC channel number.
+ *
+ * \note This macro will only work correctly on channel numbers that are compile-time
+ * constants defined by the preprocessor.
+ *
+ * \param[in] Channel Index of the ADC channel whose MUX mask is to be retrieved.
+ */
+ #define ADC_GET_CHANNEL_MASK(Channel) _ADC_GET_MUX_MASK(Channel)
//@}
/* Inline Functions: */
* pin of the AVR, denoted by its special alternative function ADCx.
* \n\n
*
- * \note The channel number must be specified as an integer, and NOT a ADC_CHANNELx mask.
+ * \note The channel number must be specified as an integer, and <b>not</b> a \c ADC_CHANNEL* mask.
*
* \param[in] ChannelIndex ADC channel number to set up for conversions.
*/
* pin of the AVR, denoted by its special alternative function ADCx.
* \n\n
*
- * \note The channel number must be specified as an integer, and NOT a ADC_CHANNELx mask.
+ * \note The channel number must be specified as an integer, and <b>not</b> a \c ADC_CHANNEL* mask.
*
* \param[in] ChannelIndex ADC channel number to set up for conversions.
*/
/** Turns off the ADC. If this is called, any further ADC operations will require a call to
* \ref ADC_Init() before the ADC can be used again.
*/
- static inline void ADC_ShutDown(void) ATTR_ALWAYS_INLINE;
- static inline void ADC_ShutDown(void)
+ static inline void ADC_Disable(void) ATTR_ALWAYS_INLINE;
+ static inline void ADC_Disable(void)
{
ADCSRA = 0;
}
/** Indicates if the ADC is currently enabled.
*
- * \return Boolean true if the ADC subsystem is currently enabled, false otherwise.
+ * \return Boolean \c true if the ADC subsystem is currently enabled, \c false otherwise.
*/
static inline bool ADC_GetStatus(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
static inline bool ADC_GetStatus(void)
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