584 lines
18 KiB
C
584 lines
18 KiB
C
/* This header file is part of the ATMEL AVR-UC3-SoftwareFramework-1.7.0 Release */
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/*This file has been prepared for Doxygen automatic documentation generation.*/
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/*! \file *********************************************************************
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*
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* \brief GPIO header for AVR32 UC3.
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*
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* This file contains basic GPIO driver functions.
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*
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* - Compiler: IAR EWAVR32 and GNU GCC for AVR32
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* - Supported devices: All AVR32 devices with a GPIO module can be used.
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* - AppNote:
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*
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* \author Atmel Corporation: http://www.atmel.com \n
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* Support and FAQ: http://support.atmel.no/
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*
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*****************************************************************************/
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/* Copyright (c) 2009 Atmel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. The name of Atmel may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* 4. This software may only be redistributed and used in connection with an Atmel
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* AVR product.
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*
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* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
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*
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*/
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#ifndef _GPIO_H_
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#define _GPIO_H_
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#include <avr32/io.h>
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#include "compiler.h"
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/*! \name Return Values of the GPIO API
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*/
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//! @{
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#define GPIO_SUCCESS 0 //!< Function successfully completed.
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#define GPIO_INVALID_ARGUMENT 1 //!< Input parameters are out of range.
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//! @}
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/*! \name Interrupt Trigger Modes
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*/
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//! @{
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#define GPIO_PIN_CHANGE 0 //!< Interrupt triggered upon pin change.
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#define GPIO_RISING_EDGE 1 //!< Interrupt triggered upon rising edge.
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#define GPIO_FALLING_EDGE 2 //!< Interrupt triggered upon falling edge.
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//! @}
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//! A type definition of pins and modules connectivity.
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typedef struct
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{
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unsigned char pin; //!< Module pin.
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unsigned char function; //!< Module function.
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} gpio_map_t[];
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/*! \name Peripheral Bus Interface
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*
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* Low-speed interface with a non-deterministic number of clock cycles per
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* access.
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*
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* This interface operates with lower clock frequencies (fPB <= fCPU), and its
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* timing is not deterministic since it needs to access a shared bus which may
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* be heavily loaded.
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*
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* \note This interface is immediately available without initialization.
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*/
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//! @{
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/*! \brief Enables specific module modes for a set of pins.
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*
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* \param gpiomap The pin map.
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* \param size The number of pins in \a gpiomap.
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*
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* \return \ref GPIO_SUCCESS or \ref GPIO_INVALID_ARGUMENT.
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*/
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extern int gpio_enable_module(const gpio_map_t gpiomap, unsigned int size);
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/*! \brief Enables a specific module mode for a pin.
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*
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* \param pin The pin number.\n
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* Refer to the product header file `uc3x.h' (where x is the part
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* number; e.g. x = a0512) for module pins. E.g., to enable a PWM
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* channel output, the pin number can be AVR32_PWM_3_PIN for PWM
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* channel 3.
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* \param function The pin function.\n
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* Refer to the product header file `uc3x.h' (where x is the
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* part number; e.g. x = a0512) for module pin functions. E.g.,
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* to enable a PWM channel output, the pin function can be
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* AVR32_PWM_3_FUNCTION for PWM channel 3.
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*
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* \return \ref GPIO_SUCCESS or \ref GPIO_INVALID_ARGUMENT.
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*/
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extern int gpio_enable_module_pin(unsigned int pin, unsigned int function);
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/*! \brief Enables the GPIO mode of a set of pins.
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*
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* \param gpiomap The pin map.
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* \param size The number of pins in \a gpiomap.
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*/
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extern void gpio_enable_gpio(const gpio_map_t gpiomap, unsigned int size);
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/*! \brief Enables the GPIO mode of a pin.
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*
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* \param pin The pin number.\n
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* Refer to the product header file `uc3x.h' (where x is the part
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* number; e.g. x = a0512) for pin definitions. E.g., to enable the
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* GPIO mode of PX21, AVR32_PIN_PX21 can be used. Module pins such as
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* AVR32_PWM_3_PIN for PWM channel 3 can also be used to release
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* module pins for GPIO.
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*/
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extern void gpio_enable_gpio_pin(unsigned int pin);
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// The open-drain mode is not synthesized on the current AVR32 products.
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// If one day some AVR32 products have this feature, the corresponding part
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// numbers should be listed in the #if below.
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// Note that other functions are available in this driver to use pins with open
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// drain in GPIO mode. The advantage of the open-drain mode functions over these
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// other functions is that they can be used not only in GPIO mode but also in
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// module mode.
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#if 0
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/*! \brief Enables the open-drain mode of a pin.
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*
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* \param pin The pin number.
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*/
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extern void gpio_enable_pin_open_drain(unsigned int pin);
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/*! \brief Disables the open-drain mode of a pin.
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*
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* \param pin The pin number.
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*/
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extern void gpio_disable_pin_open_drain(unsigned int pin);
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#endif
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/*! \brief Enables the pull-up resistor of a pin.
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*
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* \param pin The pin number.
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*/
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extern void gpio_enable_pin_pull_up(unsigned int pin);
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/*! \brief Disables the pull-up resistor of a pin.
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*
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* \param pin The pin number.
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*/
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extern void gpio_disable_pin_pull_up(unsigned int pin);
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#if defined(AVR32_GPIO_200_H_INCLUDED) || defined(AVR32_GPIO_210_H_INCLUDED) || defined(AVR32_GPIO_211_H_INCLUDED)
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// Added support of Pull-up Resistor, Pull-down Resistor and Buskeeper Control.
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/*! \brief Enables the pull-down resistor of a pin.
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*
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* \param pin The pin number.
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*/
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extern void gpio_enable_pin_pull_down(unsigned int pin);
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/*! \brief Disables the pull-down resistor of a pin.
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*
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* \param pin The pin number.
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*/
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extern void gpio_disable_pin_pull_down(unsigned int pin);
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/*! \brief Enables the buskeeper functionality on a pin.
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*
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* \param pin The pin number.
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*/
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extern void gpio_enable_pin_buskeeper(unsigned int pin);
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/*! \brief Disables the buskeeper functionality on a pin.
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*
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* \param pin The pin number.
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*/
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extern void gpio_disable_pin_buskeeper(unsigned int pin);
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#endif
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/*! \brief Returns the value of a pin.
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*
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* \param pin The pin number.
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*
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* \return The pin value.
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*/
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extern int gpio_get_pin_value(unsigned int pin);
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/*! \brief Returns the output value set for a GPIO pin.
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*
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* \param pin The pin number.
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*
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* \return The pin output value.
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*
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* \note This function must be used in conjunction with \ref gpio_set_gpio_pin,
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* \ref gpio_clr_gpio_pin and \ref gpio_tgl_gpio_pin.
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*/
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extern int gpio_get_gpio_pin_output_value(unsigned int pin);
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/*! \brief Returns the output value set for a GPIO pin using open drain.
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*
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* \param pin The pin number.
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*
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* \return The pin output value.
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*
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* \note This function must be used in conjunction with
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* \ref gpio_set_gpio_open_drain_pin, \ref gpio_clr_gpio_open_drain_pin
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* and \ref gpio_tgl_gpio_open_drain_pin.
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*/
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extern int gpio_get_gpio_open_drain_pin_output_value(unsigned int pin);
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/*! \brief Drives a GPIO pin to 1.
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*
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* \param pin The pin number.
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*/
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extern void gpio_set_gpio_pin(unsigned int pin);
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/*! \brief Drives a GPIO pin to 0.
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*
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* \param pin The pin number.
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*/
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extern void gpio_clr_gpio_pin(unsigned int pin);
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/*! \brief Toggles a GPIO pin.
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*
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* \param pin The pin number.
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*/
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extern void gpio_tgl_gpio_pin(unsigned int pin);
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/*! \brief Drives a GPIO pin to 1 using open drain.
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*
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* \param pin The pin number.
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*/
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extern void gpio_set_gpio_open_drain_pin(unsigned int pin);
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/*! \brief Drives a GPIO pin to 0 using open drain.
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*
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* \param pin The pin number.
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*/
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extern void gpio_clr_gpio_open_drain_pin(unsigned int pin);
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/*! \brief Toggles a GPIO pin using open drain.
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*
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* \param pin The pin number.
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*/
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extern void gpio_tgl_gpio_open_drain_pin(unsigned int pin);
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/*! \brief Enables the glitch filter of a pin.
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*
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* When the glitch filter is enabled, a glitch with duration of less than 1
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* clock cycle is automatically rejected, while a pulse with duration of 2 clock
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* cycles or more is accepted. For pulse durations between 1 clock cycle and 2
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* clock cycles, the pulse may or may not be taken into account, depending on
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* the precise timing of its occurrence. Thus for a pulse to be guaranteed
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* visible it must exceed 2 clock cycles, whereas for a glitch to be reliably
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* filtered out, its duration must not exceed 1 clock cycle. The filter
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* introduces 2 clock cycles latency.
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*
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* \param pin The pin number.
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*/
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extern void gpio_enable_pin_glitch_filter(unsigned int pin);
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/*! \brief Disables the glitch filter of a pin.
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*
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* \param pin The pin number.
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*/
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extern void gpio_disable_pin_glitch_filter(unsigned int pin);
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/*! \brief Enables the interrupt of a pin with the specified settings.
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*
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* \param pin The pin number.
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* \param mode The trigger mode (\ref GPIO_PIN_CHANGE, \ref GPIO_RISING_EDGE or
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* \ref GPIO_FALLING_EDGE).
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*
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* \return \ref GPIO_SUCCESS or \ref GPIO_INVALID_ARGUMENT.
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*/
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extern int gpio_enable_pin_interrupt(unsigned int pin, unsigned int mode);
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/*! \brief Disables the interrupt of a pin.
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*
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* \param pin The pin number.
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*/
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extern void gpio_disable_pin_interrupt(unsigned int pin);
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/*! \brief Gets the interrupt flag of a pin.
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*
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* \param pin The pin number.
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*
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* \return The pin interrupt flag.
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*/
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extern int gpio_get_pin_interrupt_flag(unsigned int pin);
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/*! \brief Clears the interrupt flag of a pin.
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*
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* \param pin The pin number.
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*/
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extern void gpio_clear_pin_interrupt_flag(unsigned int pin);
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//! @}
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#if (defined AVR32_GPIO_LOCAL_ADDRESS)
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/*! \name Local Bus Interface
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*
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* High-speed interface with only one clock cycle per access.
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*
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* This interface operates with high clock frequency (fCPU), and its timing is
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* deterministic since it does not need to access a shared bus which may be
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* heavily loaded.
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*
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* \warning To use this interface, the clock frequency of the peripheral bus on
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* which the GPIO peripheral is connected must be set to the CPU clock
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* frequency (fPB = fCPU).
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*
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* \note This interface has to be initialized in order to be available.
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*/
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//! @{
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/*! \brief Enables the local bus interface for GPIO.
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*
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* \note This function must have been called at least once before using other
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* functions in this interface.
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*/
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#if (defined __GNUC__)
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__attribute__((__always_inline__))
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#endif
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extern __inline__ void gpio_local_init(void)
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{
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Set_system_register(AVR32_CPUCR,
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Get_system_register(AVR32_CPUCR) | AVR32_CPUCR_LOCEN_MASK);
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}
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/*! \brief Enables the output driver of a pin.
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*
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* \param pin The pin number.
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*
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* \note \ref gpio_local_init must have been called beforehand.
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*
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* \note This function does not enable the GPIO mode of the pin.
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* \ref gpio_enable_gpio_pin can be called for this purpose.
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*/
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#if (defined __GNUC__)
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__attribute__((__always_inline__))
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#endif
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extern __inline__ void gpio_local_enable_pin_output_driver(unsigned int pin)
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{
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AVR32_GPIO_LOCAL.port[pin >> 5].oders = 1 << (pin & 0x1F);
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}
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/*! \brief Disables the output driver of a pin.
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*
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* \param pin The pin number.
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*
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* \note \ref gpio_local_init must have been called beforehand.
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*/
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#if (defined __GNUC__)
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__attribute__((__always_inline__))
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#endif
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extern __inline__ void gpio_local_disable_pin_output_driver(unsigned int pin)
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{
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AVR32_GPIO_LOCAL.port[pin >> 5].oderc = 1 << (pin & 0x1F);
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}
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/*! \brief Returns the value of a pin.
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*
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* \param pin The pin number.
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*
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* \return The pin value.
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*
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* \note \ref gpio_local_init must have been called beforehand.
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*/
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#if (defined __GNUC__)
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__attribute__((__always_inline__))
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#endif
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extern __inline__ int gpio_local_get_pin_value(unsigned int pin)
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{
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return (AVR32_GPIO_LOCAL.port[pin >> 5].pvr >> (pin & 0x1F)) & 1;
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}
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/*! \brief Drives a GPIO pin to 1.
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*
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* \param pin The pin number.
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*
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* \note \ref gpio_local_init must have been called beforehand.
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*
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* \note This function does not enable the GPIO mode of the pin nor its output
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* driver. \ref gpio_enable_gpio_pin and
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* \ref gpio_local_enable_pin_output_driver can be called for this
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* purpose.
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*/
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#if (defined __GNUC__)
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__attribute__((__always_inline__))
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#endif
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extern __inline__ void gpio_local_set_gpio_pin(unsigned int pin)
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{
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AVR32_GPIO_LOCAL.port[pin >> 5].ovrs = 1 << (pin & 0x1F);
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}
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/*! \brief Drives a GPIO pin to 0.
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*
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* \param pin The pin number.
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*
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* \note \ref gpio_local_init must have been called beforehand.
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*
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* \note This function does not enable the GPIO mode of the pin nor its output
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* driver. \ref gpio_enable_gpio_pin and
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* \ref gpio_local_enable_pin_output_driver can be called for this
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* purpose.
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*/
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#if (defined __GNUC__)
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__attribute__((__always_inline__))
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#endif
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extern __inline__ void gpio_local_clr_gpio_pin(unsigned int pin)
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{
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AVR32_GPIO_LOCAL.port[pin >> 5].ovrc = 1 << (pin & 0x1F);
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}
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/*! \brief Toggles a GPIO pin.
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*
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* \param pin The pin number.
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*
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* \note \ref gpio_local_init must have been called beforehand.
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*
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* \note This function does not enable the GPIO mode of the pin nor its output
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* driver. \ref gpio_enable_gpio_pin and
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* \ref gpio_local_enable_pin_output_driver can be called for this
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* purpose.
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*/
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#if (defined __GNUC__)
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__attribute__((__always_inline__))
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#endif
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extern __inline__ void gpio_local_tgl_gpio_pin(unsigned int pin)
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{
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AVR32_GPIO_LOCAL.port[pin >> 5].ovrt = 1 << (pin & 0x1F);
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}
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/*! \brief Initializes the configuration of a GPIO pin so that it can be used
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* with GPIO open-drain functions.
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*
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* \note This function must have been called at least once before using
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* \ref gpio_local_set_gpio_open_drain_pin,
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* \ref gpio_local_clr_gpio_open_drain_pin or
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* \ref gpio_local_tgl_gpio_open_drain_pin.
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*/
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#if (defined __GNUC__)
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__attribute__((__always_inline__))
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#endif
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extern __inline__ void gpio_local_init_gpio_open_drain_pin(unsigned int pin)
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{
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AVR32_GPIO_LOCAL.port[pin >> 5].ovrc = 1 << (pin & 0x1F);
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}
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/*! \brief Drives a GPIO pin to 1 using open drain.
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*
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* \param pin The pin number.
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*
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* \note \ref gpio_local_init and \ref gpio_local_init_gpio_open_drain_pin must
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* have been called beforehand.
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*
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* \note This function does not enable the GPIO mode of the pin.
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* \ref gpio_enable_gpio_pin can be called for this purpose.
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*/
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#if (defined __GNUC__)
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__attribute__((__always_inline__))
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#endif
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extern __inline__ void gpio_local_set_gpio_open_drain_pin(unsigned int pin)
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{
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AVR32_GPIO_LOCAL.port[pin >> 5].oderc = 1 << (pin & 0x1F);
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}
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/*! \brief Drives a GPIO pin to 0 using open drain.
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*
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* \param pin The pin number.
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*
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* \note \ref gpio_local_init and \ref gpio_local_init_gpio_open_drain_pin must
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* have been called beforehand.
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*
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* \note This function does not enable the GPIO mode of the pin.
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* \ref gpio_enable_gpio_pin can be called for this purpose.
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*/
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#if (defined __GNUC__)
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__attribute__((__always_inline__))
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#endif
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extern __inline__ void gpio_local_clr_gpio_open_drain_pin(unsigned int pin)
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|
{
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AVR32_GPIO_LOCAL.port[pin >> 5].oders = 1 << (pin & 0x1F);
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}
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|
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/*! \brief Toggles a GPIO pin using open drain.
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*
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|
* \param pin The pin number.
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|
*
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|
* \note \ref gpio_local_init and \ref gpio_local_init_gpio_open_drain_pin must
|
|
* have been called beforehand.
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|
*
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|
* \note This function does not enable the GPIO mode of the pin.
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|
* \ref gpio_enable_gpio_pin can be called for this purpose.
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|
*/
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#if (defined __GNUC__)
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|
__attribute__((__always_inline__))
|
|
#endif
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extern __inline__ void gpio_local_tgl_gpio_open_drain_pin(unsigned int pin)
|
|
{
|
|
AVR32_GPIO_LOCAL.port[pin >> 5].odert = 1 << (pin & 0x1F);
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|
}
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|
|
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//! @}
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|
#endif // AVR32_GPIO_LOCAL_ADDRESS
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|
|
|
#if UC3L
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|
//! @{
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|
/*! \name Peripheral Event System support
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|
*
|
|
* The GPIO can be programmed to output peripheral events whenever an interrupt
|
|
* condition is detected, such as pin value change, or only when a rising or
|
|
* falling edge is detected.
|
|
*
|
|
*/
|
|
|
|
/*! \brief Enables the peripheral event generation of a pin.
|
|
*
|
|
* \param pin The pin number.
|
|
*
|
|
*/
|
|
#if (defined __GNUC__)
|
|
__attribute__((__always_inline__))
|
|
#endif
|
|
extern __inline__ void gpio_enable_pin_periph_event(unsigned int pin)
|
|
{
|
|
AVR32_GPIO.port[pin >> 5].oderc = 1 << (pin & 0x1F); // The GPIO output driver is disabled for that pin.
|
|
AVR32_GPIO.port[pin >> 5].evers = 1 << (pin & 0x1F);
|
|
}
|
|
|
|
/*! \brief Disables the peripheral event generation of a pin.
|
|
*
|
|
* \param pin The pin number.
|
|
*
|
|
*/
|
|
#if (defined __GNUC__)
|
|
__attribute__((__always_inline__))
|
|
#endif
|
|
extern __inline__ void gpio_disable_pin_periph_event(unsigned int pin)
|
|
{
|
|
AVR32_GPIO.port[pin >> 5].everc = 1 << (pin & 0x1F);
|
|
}
|
|
|
|
/*! \brief Configure the peripheral event trigger mode of a pin
|
|
*
|
|
* \param pin The pin number.
|
|
* \param mode The trigger mode (\ref GPIO_PIN_CHANGE, \ref GPIO_RISING_EDGE or
|
|
* \ref GPIO_FALLING_EDGE).
|
|
* \param use_igf use the Input Glitch Filter (TRUE) or not (FALSE).
|
|
*
|
|
* \return \ref GPIO_SUCCESS or \ref GPIO_INVALID_ARGUMENT.
|
|
*/
|
|
extern int gpio_configure_pin_periph_event_mode(unsigned int pin, unsigned int mode, unsigned int use_igf);
|
|
|
|
//! @}
|
|
#endif
|
|
|
|
|
|
#endif // _GPIO_H_
|