| /* ---------------------------------------------------------------------------- |
| * ATMEL Microcontroller Software Support |
| * ---------------------------------------------------------------------------- |
| * Copyright (c) 2008, 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, void (*handler)( const Pin* ) ) ; |
| |
| 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_ */ |
| |