Real AT91 lib defines
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+/* ----------------------------------------------------------------------------
+ * ATMEL Microcontroller Software Support
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2010, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+/**
+ * \file
+ *
+ * \section Purpose
+ *
+ * This file provides a basic API for PIO configuration and usage of
+ * user-controlled pins. Please refer to the board.h file for a list of
+ * available pin definitions.
+ *
+ * \section Usage
+ *
+ * -# Define a constant pin description array such as the following one, using
+ * the existing definitions provided by the board.h file if possible:
+ * \code
+ * const Pin pPins[] = {PIN_USART0_TXD, PIN_USART0_RXD};
+ * \endcode
+ * Alternatively, it is possible to add new pins by provided the full Pin
+ * structure:
+ * \code
+ * // Pin instance to configure PA10 & PA11 as inputs with the internal
+ * // pull-up enabled.
+ * const Pin pPins = {
+ * (1 << 10) | (1 << 11),
+ * REG_PIOA,
+ * ID_PIOA,
+ * PIO_INPUT,
+ * PIO_PULLUP
+ * };
+ * \endcode
+ * -# Configure a pin array by calling PIO_Configure() with a pointer to the
+ * array and its size (which is computed using the PIO_LISTSIZE macro).
+ * -# Change and get the value of a user-controlled pin using the PIO_Set,
+ * PIO_Clear and PIO_Get methods.
+ * -# Get the level being currently output by a user-controlled pin configured
+ * as an output using PIO_GetOutputDataStatus().
+ */
+
+#ifndef _PIO_
+#define _PIO_
+
+/*
+ * Headers
+ */
+
+#include "chip.h"
+
+#include <stdint.h>
+
+/*
+ * Global Definitions
+ */
+
+/* The pin is controlled by the associated signal of peripheral A. */
+#define PIO_PERIPH_A 0
+/* The pin is controlled by the associated signal of peripheral B. */
+#define PIO_PERIPH_B 1
+/* The pin is controlled by the associated signal of peripheral C. */
+#define PIO_PERIPH_C 2
+/* The pin is controlled by the associated signal of peripheral D. */
+#define PIO_PERIPH_D 3
+/* The pin is an input. */
+#define PIO_INPUT 4
+/* The pin is an output and has a default level of 0. */
+#define PIO_OUTPUT_0 5
+/* The pin is an output and has a default level of 1. */
+#define PIO_OUTPUT_1 6
+
+/* Default pin configuration (no attribute). */
+#define PIO_DEFAULT (0 << 0)
+/* The internal pin pull-up is active. */
+#define PIO_PULLUP (1 << 0)
+/* The internal glitch filter is active. */
+#define PIO_DEGLITCH (1 << 1)
+/* The pin is open-drain. */
+#define PIO_OPENDRAIN (1 << 2)
+
+/* The internal debouncing filter is active. */
+#define PIO_DEBOUNCE (1 << 3)
+
+/* Enable additional interrupt modes. */
+#define PIO_IT_AIME (1 << 4)
+
+/* Interrupt High Level/Rising Edge detection is active. */
+#define PIO_IT_RE_OR_HL (1 << 5)
+/* Interrupt Edge detection is active. */
+#define PIO_IT_EDGE (1 << 6)
+
+/* Low level interrupt is active */
+#define PIO_IT_LOW_LEVEL (0 | 0 | PIO_IT_AIME)
+/* High level interrupt is active */
+#define PIO_IT_HIGH_LEVEL (PIO_IT_RE_OR_HL | 0 | PIO_IT_AIME)
+/* Falling edge interrupt is active */
+#define PIO_IT_FALL_EDGE (0 | PIO_IT_EDGE | PIO_IT_AIME)
+/* Rising edge interrupt is active */
+#define PIO_IT_RISE_EDGE (PIO_IT_RE_OR_HL | PIO_IT_EDGE | PIO_IT_AIME)
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/*
+ * Global Macros
+ */
+
+/**
+ * Calculates the size of an array of Pin instances. The array must be defined
+ * locally (i.e. not a pointer), otherwise the computation will not be correct.
+ * \param pPins Local array of Pin instances.
+ * \return Number of elements in array.
+ */
+#define PIO_LISTSIZE(pPins) (sizeof(pPins) / sizeof(Pin))
+
+/*
+ * Global Types
+ */
+
+
+/*
+ * Describes the type and attribute of one PIO pin or a group of similar pins.
+ * The #type# field can have the following values:
+ * - PIO_PERIPH_A
+ * - PIO_PERIPH_B
+ * - PIO_OUTPUT_0
+ * - PIO_OUTPUT_1
+ * - PIO_INPUT
+ *
+ * The #attribute# field is a bitmask that can either be set to PIO_DEFAULt,
+ * or combine (using bitwise OR '|') any number of the following constants:
+ * - PIO_PULLUP
+ * - PIO_DEGLITCH
+ * - PIO_DEBOUNCE
+ * - PIO_OPENDRAIN
+ * - PIO_IT_LOW_LEVEL
+ * - PIO_IT_HIGH_LEVEL
+ * - PIO_IT_FALL_EDGE
+ * - PIO_IT_RISE_EDGE
+ */
+typedef struct _Pin
+{
+ /* Bitmask indicating which pin(s) to configure. */
+ uint32_t mask;
+ /* Pointer to the PIO controller which has the pin(s). */
+ Pio *pio;
+ /* Peripheral ID of the PIO controller which has the pin(s). */
+ uint8_t id;
+ /* Pin type. */
+ uint8_t type;
+ /* Pin attribute. */
+ uint8_t attribute;
+} Pin ;
+
+/*
+ * Global Access Macros
+ */
+
+/*
+ * Global Functions
+ */
+
+extern uint8_t PIO_Configure( const Pin *list, uint32_t size ) ;
+
+extern void PIO_Set( const Pin *pin ) ;
+
+extern void PIO_Clear( const Pin *pin ) ;
+
+extern uint8_t PIO_Get( const Pin *pin ) ;
+
+extern uint8_t PIO_GetOutputDataStatus( const Pin *pin ) ;
+
+extern void PIO_SetDebounceFilter( const Pin *pin, uint32_t cuttoff );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* #ifndef _PIO_ */
+