-/*\r
- LUFA Library\r
- Copyright (C) Dean Camera, 2009.\r
- \r
- dean [at] fourwalledcubicle [dot] com\r
- www.fourwalledcubicle.com\r
-*/\r
-\r
-/*\r
- Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
-\r
- Permission to use, copy, modify, and distribute this software\r
- and its documentation for any purpose and without fee is hereby\r
- granted, provided that the above copyright notice appear in all\r
- copies and that both that the copyright notice and this\r
- permission notice and warranty disclaimer appear in supporting\r
- documentation, and that the name of the author not be used in\r
- advertising or publicity pertaining to distribution of the\r
- software without specific, written prior permission.\r
-\r
- The author disclaim all warranties with regard to this\r
- software, including all implied warranties of merchantability\r
- and fitness. In no event shall the author be liable for any\r
- special, indirect or consequential damages or any damages\r
- whatsoever resulting from loss of use, data or profits, whether\r
- in an action of contract, negligence or other tortious action,\r
- arising out of or in connection with the use or performance of\r
- this software.\r
-*/\r
-\r
-/** \file\r
- *\r
- * ADC driver for the AT90USB1287, AT90USB1286, AT90USB647, AT90USB646, ATMEGA16U4 and ATMEGA32U4 AVRs.\r
- *\r
- * \note This file should not be included directly. It is automatically included as needed by the ADC driver\r
- * dispatch header located in LUFA/Drivers/Peripheral/ADC.h.\r
- */\r
-\r
-/** \ingroup Group_ADC\r
- * @defgroup Group_ADC_AT90USBXXX67 AT90USBXXX6 and AT90USBXXX7 Models\r
- *\r
- * @{\r
- */\r
- \r
-#ifndef __ADC_AT90USBXXX67_H__\r
-#define __ADC_AT90USBXXX67_H__\r
-\r
- /* Includes: */\r
- #include "../../../Common/Common.h"\r
- \r
- #include <avr/io.h>\r
- #include <stdbool.h>\r
- \r
- /* Enable C linkage for C++ Compilers: */\r
- #if defined(__cplusplus)\r
- extern "C" {\r
- #endif\r
-\r
- /* Preprocessor Checks: */\r
- #if !defined(INCLUDE_FROM_ADC_H)\r
- #error Do not include this file directly. Include LUFA/Drivers/Peripheral/ADC.h instead.\r
- #endif\r
-\r
- /* Public Interface - May be used in end-application: */\r
- /* Macros: */\r
- /** Initializes the ADC, ready for conversions. This must be called before any other ADC operations.\r
- * The "mode" parameter should be a mask comprised of a conversion mode (free running or single) and\r
- * prescaler masks.\r
- */\r
- #define ADC_Init(mode) MACROS{ ADCSRA = ((1 << ADEN) | mode); }MACROE\r
-\r
- /** Turns off the ADC. If this is called, any further ADC operations will require a call to the\r
- * ADC_Init() macro before the ADC can be used again.\r
- */\r
- #define ADC_Off() MACROS{ ADCSRA = 0; }MACROE\r
- \r
- /** Indicates if the ADC is enabled. This macro will return boolean true if the ADC subsystem is\r
- * currently enabled, or false otherwise.\r
- */\r
- #define ADC_GetStatus() ((ADCSRA & (1 << ADEN)) ? true : false)\r
-\r
- /** Indicates if the current ADC conversion is completed, or still in progress. This returns boolean\r
- * false if the reading is still taking place, or true if the conversion is complete and ready to be\r
- * read out with ADC_GetResult().\r
- */\r
- #define ADC_IsReadingComplete() (!(ADCSRA & (1 << ADSC)))\r
- \r
- /** Returns the result of the last conversion, as a 16-bit wide integer. */\r
- #define ADC_GetResult() ADC\r
- \r
- /** Reference mask, for using the voltage present at the AVR's AREF pin for the ADC reference. */\r
- #define ADC_REFERENCE_AREF 0\r
-\r
- /** Reference mask, for using the voltage present at the AVR's AVCC pin for the ADC reference. */\r
- #define ADC_REFERENCE_AVCC (1 << REFS0)\r
-\r
- /** Reference mask, for using the internally generated 2.56V reference voltage as the ADC reference. */\r
- #define ADC_REFERENCE_INT2560MV ((1 << REFS1)| (1 << REFS0))\r
- \r
- /** Left-adjusts the 10-bit ADC result, so that the upper 8 bits of the value returned by the\r
- * ADC_GetResult() macro contain the 8 most significant bits of the result. */\r
- #define ADC_LEFT_ADJUSTED (1 << ADLAR)\r
-\r
- /** Right-adjusts the 10-bit ADC result, so that the lower 8 bits of the value returned by the\r
- * ADC_GetResult() macro contain the 8 least significant bits of the result. */\r
- #define ADC_RIGHT_ADJUSTED (0 << ADLAR)\r
- \r
- /** Sets the ADC mode to free running, so that conversions take place continuously as fast as the ADC\r
- * is capable of at the given input clock speed. */\r
- #define ADC_FREE_RUNNING (1 << ADATE)\r
-\r
- /** Sets the ADC mode to single conversion, so that only a single conversion will take place before\r
- * the ADC returns to idle. */\r
- #define ADC_SINGLE_CONVERSION (0 << ADATE)\r
- \r
- /** Sets the ADC input clock to prescale by a factor of 2 the AVR's system clock. */\r
- #define ADC_PRESCALE_2 (1 << ADPS0)\r
-\r
- /** Sets the ADC input clock to prescale by a factor of 4 the AVR's system clock. */\r
- #define ADC_PRESCALE_4 (1 << ADPS1)\r
-\r
- /** Sets the ADC input clock to prescale by a factor of 8 the AVR's system clock. */\r
- #define ADC_PRESCALE_8 ((1 << ADPS0) | (1 << ADPS1))\r
-\r
- /** Sets the ADC input clock to prescale by a factor of 16 the AVR's system clock. */\r
- #define ADC_PRESCALE_16 (1 << ADPS2)\r
-\r
- /** Sets the ADC input clock to prescale by a factor of 32 the AVR's system clock. */\r
- #define ADC_PRESCALE_32 ((1 << ADPS2) | (1 << ADPS0))\r
-\r
- /** Sets the ADC input clock to prescale by a factor of 64 the AVR's system clock. */\r
- #define ADC_PRESCALE_64 ((1 << ADPS2) | (1 << ADPS1))\r
-\r
- /** Sets the ADC input clock to prescale by a factor of 128 the AVR's system clock. */\r
- #define ADC_PRESCALE_128 ((1 << ADPS2) | (1 << ADPS1) | (1 << ADPS0))\r
-\r
- /* Inline Functions: */\r
- /** Configures the given ADC channel, ready for ADC conversions. This function sets the\r
- * associated port pin as an input and disables the digital portion of the I/O to reduce\r
- * power consumption.\r
- *\r
- * \param Channel ADC channel number to set up for conversions\r
- */\r
- static inline void ADC_SetupChannel(const uint8_t Channel)\r
- {\r
- DDRF &= ~(1 << Channel);\r
- DIDR0 |= (1 << Channel);\r
- }\r
- \r
- /** Starts the reading of the given channel, but does not wait until the conversion has completed.\r
- * Once executed, the conversion status can be determined via the ADC_IsReadingComplete() macro and\r
- * the result read via the ADC_GetResult() macro.\r
- *\r
- * \param MUXMask Mask comprising of an ADC channel number, reference mask and adjustment mask\r
- */\r
- static inline void ADC_StartReading(const uint8_t MUXMask)\r
- {\r
- ADMUX = MUXMask;\r
- \r
- ADCSRA |= (1 << ADSC);\r
- }\r
-\r
- /** Performs a complete single reading from channel, including a polling spinloop to wait for the\r
- * conversion to complete, and the returning of the converted value.\r
- *\r
- * \param MUXMask Mask comprising of an ADC channel number, reference mask and adjustment mask\r
- */\r
- static inline uint16_t ADC_GetChannelReading(const uint8_t MUXMask) ATTR_WARN_UNUSED_RESULT;\r
- static inline uint16_t ADC_GetChannelReading(const uint8_t MUXMask)\r
- {\r
- ADC_StartReading(MUXMask);\r
- \r
- while (!(ADC_IsReadingComplete()));\r
- \r
- return ADC_GetResult();\r
- }\r
-\r
- /* Disable C linkage for C++ Compilers: */\r
- #if defined(__cplusplus)\r
- }\r
- #endif\r
- \r
-#endif\r
-\r
-/** @} */\r
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