mirror of
https://github.com/arduino/Arduino.git
synced 2024-12-15 00:23:56 +01:00
97 lines
3.3 KiB
C
97 lines
3.3 KiB
C
/* ----------------------------------------------------------------------------
|
|
* SAM Software Package License
|
|
* ----------------------------------------------------------------------------
|
|
* Copyright (c) 2011-2012, Atmel Corporation
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following condition is 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
|
|
*
|
|
* \par Purpose
|
|
*
|
|
* Configuration and handling of interrupts on PIO status changes. The API
|
|
* provided here have several advantages over the traditional PIO interrupt
|
|
* configuration approach:
|
|
* - It is highly portable
|
|
* - It automatically demultiplexes interrupts when multiples pins have been
|
|
* configured on a single PIO controller
|
|
* - It allows a group of pins to share the same interrupt
|
|
*
|
|
* However, it also has several minor drawbacks that may prevent from using it
|
|
* in particular applications:
|
|
* - It enables the clocks of all PIO controllers
|
|
* - PIO controllers all share the same interrupt handler, which does the
|
|
* demultiplexing and can be slower than direct configuration
|
|
* - It reserves space for a fixed number of interrupts, which can be
|
|
* increased by modifying the appropriate constant in pio_it.c.
|
|
*
|
|
* \par Usage
|
|
*
|
|
* -# Initialize the PIO interrupt mechanism using PIO_InitializeInterrupts()
|
|
* with the desired priority (0 ... 7).
|
|
* -# Configure a status change interrupt on one or more pin(s) with
|
|
* PIO_ConfigureIt().
|
|
* -# Enable & disable interrupts on pins using PIO_EnableIt() and
|
|
* PIO_DisableIt().
|
|
*/
|
|
|
|
#ifndef _PIO_IT_
|
|
#define _PIO_IT_
|
|
|
|
/*
|
|
* Headers
|
|
*/
|
|
|
|
#include "pio.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* Global functions
|
|
*/
|
|
|
|
extern void PIO_InitializeInterrupts( uint32_t dwPriority ) ;
|
|
|
|
extern void PIO_ConfigureIt( const Pin *pPin, void (*handler)( const Pin* ) ) ;
|
|
|
|
extern void PIO_EnableIt( const Pio* pPio, const uint32_t dwMask ) ;
|
|
extern void PIO_DisableIt( const Pio* pPio, const uint32_t dwMask ) ;
|
|
|
|
extern void PIO_IT_InterruptHandler( void ) ;
|
|
|
|
extern void PioInterruptHandler( uint32_t id, Pio *pPio ) ;
|
|
|
|
extern void PIO_CaptureHandler( void ) ;
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* #ifndef _PIO_IT_ */
|
|
|