| /* ---------------------------------------------------------------------------- | |
| * SAM Software Package License | |
| * ---------------------------------------------------------------------------- | |
| * Copyright (c) 2014, 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 | |
| * | |
| * \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) ; | |
| extern void PIO_EnableIt( const Pin *pPin ) ; | |
| extern void PIO_DisableIt( const Pin *pPin ) ; | |
| 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_ */ | |