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97 lines
3.3 KiB
C
97 lines
3.3 KiB
C
/* ----------------------------------------------------------------------------
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* SAM Software Package License
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* ----------------------------------------------------------------------------
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* Copyright (c) 2011, Atmel Corporation
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*
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* 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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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaimer below.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED 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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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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/**
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* \file
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*
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* \par Purpose
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*
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* Configuration and handling of interrupts on PIO status changes. The API
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* provided here have several advantages over the traditional PIO interrupt
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* configuration approach:
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* - It is highly portable
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* - It automatically demultiplexes interrupts when multiples pins have been
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* configured on a single PIO controller
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* - It allows a group of pins to share the same interrupt
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*
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* However, it also has several minor drawbacks that may prevent from using it
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* in particular applications:
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* - It enables the clocks of all PIO controllers
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* - PIO controllers all share the same interrupt handler, which does the
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* demultiplexing and can be slower than direct configuration
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* - It reserves space for a fixed number of interrupts, which can be
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* increased by modifying the appropriate constant in pio_it.c.
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*
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* \par Usage
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*
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* -# Initialize the PIO interrupt mechanism using PIO_InitializeInterrupts()
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* with the desired priority (0 ... 7).
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* -# Configure a status change interrupt on one or more pin(s) with
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* PIO_ConfigureIt().
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* -# Enable & disable interrupts on pins using PIO_EnableIt() and
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* PIO_DisableIt().
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*/
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#ifndef _PIO_IT_
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#define _PIO_IT_
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/*
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* Headers
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*/
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#include "pio.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Global functions
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*/
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extern void PIO_InitializeInterrupts( uint32_t dwPriority ) ;
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extern void PIO_ConfigureIt( const Pin *pPin, void (*handler)( const Pin* ) ) ;
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extern void PIO_EnableIt( const Pio* pPio, const uint32_t dwMask ) ;
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extern void PIO_DisableIt( const Pio* pPio, const uint32_t dwMask ) ;
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extern void PIO_IT_InterruptHandler( void ) ;
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extern void PioInterruptHandler( uint32_t id, Pio *pPio ) ;
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extern void PIO_CaptureHandler( void ) ;
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#ifdef __cplusplus
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}
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#endif
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#endif /* #ifndef _PIO_IT_ */
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