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Diffstat (limited to 'LUFA/Drivers/Peripheral/AT90USBXXX67')
| -rw-r--r-- | LUFA/Drivers/Peripheral/AT90USBXXX67/ADC.h | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/LUFA/Drivers/Peripheral/AT90USBXXX67/ADC.h b/LUFA/Drivers/Peripheral/AT90USBXXX67/ADC.h new file mode 100644 index 000000000..a5bf03734 --- /dev/null +++ b/LUFA/Drivers/Peripheral/AT90USBXXX67/ADC.h @@ -0,0 +1,185 @@ +/*
+ 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
+ *
+ * ADC driver for the AT90USB1287, AT90USB1286, AT90USB647, AT90USB646, ATMEGA16U4 and ATMEGA32U4 AVRs.
+ *
+ * \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.
+ */
+
+/** \ingroup Group_ADC
+ * @defgroup Group_ADC_AT90USBXXX67 AT90USBXXX6 and AT90USBXXX7 Models
+ *
+ * @{
+ */
+
+#ifndef __ADC_AT90USBXXX67_H__
+#define __ADC_AT90USBXXX67_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
+
+ /* Preprocessor Checks: */
+ #if !defined(INCLUDE_FROM_ADC_H)
+ #error Do not include this file directly. Include LUFA/Drivers/Peripheral/ADC.h instead.
+ #endif
+
+ /* Public Interface - May be used in end-application: */
+ /* Macros: */
+ /** Initializes the ADC, ready for conversions. This must be called before any other ADC operations.
+ * The "mode" parameter should be a mask comprised of a conversion mode (free running or single) and
+ * prescaler masks.
+ */
+ #define ADC_Init(mode) MACROS{ ADCSRA = ((1 << ADEN) | mode); }MACROE
+
+ /** Turns off the ADC. If this is called, any further ADC operations will require a call to the
+ * ADC_Init() macro before the ADC can be used again.
+ */
+ #define ADC_Off() MACROS{ ADCSRA = 0; }MACROE
+
+ /** Indicates if the ADC is enabled. This macro will return boolean true if the ADC subsystem is
+ * currently enabled, or false otherwise.
+ */
+ #define ADC_GetStatus() ((ADCSRA & (1 << ADEN)) ? true : false)
+
+ /** Indicates if the current ADC conversion is completed, or still in progress. This returns boolean
+ * false if the reading is still taking place, or true if the conversion is complete and ready to be
+ * read out with ADC_GetResult().
+ */
+ #define ADC_IsReadingComplete() (!(ADCSRA & (1 << ADSC)))
+
+ /** Returns the result of the last conversion, as a 16-bit wide integer. */
+ #define ADC_GetResult() ADC
+
+ /** 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 voltage present at the AVR's AVCC pin for the ADC reference. */
+ #define ADC_REFERENCE_AVCC (1 << REFS0)
+
+ /** 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 4 the AVR's system clock. */
+ #define ADC_PRESCALE_4 (1 << ADPS1)
+
+ /** Sets the ADC input clock to prescale by a factor of 8 the AVR's system clock. */
+ #define ADC_PRESCALE_8 ((1 << ADPS0) | (1 << ADPS1))
+
+ /** Sets the ADC input clock to prescale by a factor of 16 the AVR's system clock. */
+ #define ADC_PRESCALE_16 (1 << ADPS2)
+
+ /** Sets the ADC input clock to prescale by a factor of 32 the AVR's system clock. */
+ #define ADC_PRESCALE_32 ((1 << ADPS2) | (1 << ADPS0))
+
+ /** Sets the ADC input clock to prescale by a factor of 64 the AVR's system clock. */
+ #define ADC_PRESCALE_64 ((1 << ADPS2) | (1 << ADPS1))
+
+ /** 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))
+
+ /* 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
+ * power consumption.
+ *
+ * \param Channel ADC channel number to set up for conversions
+ */
+ static inline void ADC_SetupChannel(const uint8_t Channel)
+ {
+ DDRF &= ~(1 << Channel);
+ DIDR0 |= (1 << Channel);
+ }
+
+ /** Starts the reading of the given channel, but does not wait until the conversion has completed.
+ * Once executed, the conversion status can be determined via the ADC_IsReadingComplete() macro and
+ * the result read via the ADC_GetResult() macro.
+ *
+ * \param MUXMask Mask comprising of an ADC channel number, reference mask and adjustment mask
+ */
+ static inline void ADC_StartReading(const uint8_t MUXMask)
+ {
+ ADMUX = MUXMask;
+
+ ADCSRA |= (1 << ADSC);
+ }
+
+ /** Performs a complete single reading from channel, including a polling spinloop to wait for the
+ * conversion to complete, and the returning of the converted value.
+ *
+ * \param MUXMask Mask comprising of an ADC channel number, reference mask and adjustment mask
+ */
+ static inline uint16_t ADC_GetChannelReading(const uint8_t MUXMask) ATTR_WARN_UNUSED_RESULT;
+ static inline uint16_t ADC_GetChannelReading(const uint8_t MUXMask)
+ {
+ ADC_StartReading(MUXMask);
+
+ while (!(ADC_IsReadingComplete()));
+
+ return ADC_GetResult();
+ }
+
+ /* Disable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ }
+ #endif
+
+#endif
+
+/** @} */
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