| /* ---------------------------------------------------------------------------- | |
| * SAM Software Package License | |
| * ---------------------------------------------------------------------------- | |
| * Copyright (c) 2011, 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 pin pull-down is active. */ | |
| #define PIO_PULLDOWN (1 << 3) | |
| /* 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) | |
| #define PIO_WPMR_WPEN_EN ( 0x01 << 0 ) | |
| #define PIO_WPMR_WPEN_DIS ( 0x00 << 0 ) | |
| #define PIO_WPMR_WPKEY_VALID ( 0x50494F << 8 ) | |
| #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 ); | |
| extern void PIO_EnableWriteProtect( const Pin *pin ); | |
| extern void PIO_DisableWriteProtect( const Pin *pin ); | |
| extern uint32_t PIO_GetWriteProtectViolationInfo( const Pin * pin ); | |
| extern void PIO_Output_Low (Pio * pio, uint32_t pioId); | |
| #ifdef __cplusplus | |
| } | |
| #endif | |
| #endif /* #ifndef _PIO_ */ | |