From 74298f8ca11dc8d3b0359d1d4e124d6494c3eeac Mon Sep 17 00:00:00 2001 From: Nicolas Schodet Date: Fri, 10 Apr 2009 01:15:42 +0200 Subject: * digital/avr/modules/usb: - imported LUFA. --- .../LUFA/Drivers/AT90USBXXX/AT90USBXXX67/ADC.h | 177 +++++++++++++++++++++ 1 file changed, 177 insertions(+) create mode 100644 digital/avr/modules/usb/lufa/LUFA/Drivers/AT90USBXXX/AT90USBXXX67/ADC.h (limited to 'digital/avr/modules/usb/lufa/LUFA/Drivers/AT90USBXXX/AT90USBXXX67/ADC.h') diff --git a/digital/avr/modules/usb/lufa/LUFA/Drivers/AT90USBXXX/AT90USBXXX67/ADC.h b/digital/avr/modules/usb/lufa/LUFA/Drivers/AT90USBXXX/AT90USBXXX67/ADC.h new file mode 100644 index 00000000..58027709 --- /dev/null +++ b/digital/avr/modules/usb/lufa/LUFA/Drivers/AT90USBXXX/AT90USBXXX67/ADC.h @@ -0,0 +1,177 @@ +/* + 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/AT90USBXXX/ADC.h. + */ + +#ifndef __ADC_AT90USBXXX67_H__ +#define __ADC_AT90USBXXX67_H__ + + /* Includes: */ + #include + #include + + #include "../../../Common/Common.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/AT90USBXXX/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) + { + DDRD &= ~(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 -- cgit v1.2.3