| Christina Quast | 53b2105 | 2014-12-09 15:34:35 +0100 | [diff] [blame] | 1 | /* ---------------------------------------------------------------------------- |
| 2 | * ATMEL Microcontroller Software Support |
| 3 | * ---------------------------------------------------------------------------- |
| 4 | * Copyright (c) 2008, Atmel Corporation |
| 5 | * |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions are met: |
| 10 | * |
| 11 | * - Redistributions of source code must retain the above copyright notice, |
| 12 | * this list of conditions and the disclaimer below. |
| 13 | * |
| 14 | * Atmel's name may not be used to endorse or promote products derived from |
| 15 | * this software without specific prior written permission. |
| 16 | * |
| 17 | * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE |
| 20 | * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, |
| 23 | * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 24 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 25 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| 26 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | * ---------------------------------------------------------------------------- |
| 28 | */ |
| 29 | |
| 30 | /** |
| 31 | * \file |
| 32 | * |
| 33 | * \par Purpose |
| 34 | * |
| 35 | * Configuration and handling of interrupts on PIO status changes. The API |
| 36 | * provided here have several advantages over the traditional PIO interrupt |
| 37 | * configuration approach: |
| 38 | * - It is highly portable |
| 39 | * - It automatically demultiplexes interrupts when multiples pins have been |
| 40 | * configured on a single PIO controller |
| 41 | * - It allows a group of pins to share the same interrupt |
| 42 | * |
| 43 | * However, it also has several minor drawbacks that may prevent from using it |
| 44 | * in particular applications: |
| 45 | * - It enables the clocks of all PIO controllers |
| 46 | * - PIO controllers all share the same interrupt handler, which does the |
| 47 | * demultiplexing and can be slower than direct configuration |
| 48 | * - It reserves space for a fixed number of interrupts, which can be |
| 49 | * increased by modifying the appropriate constant in pio_it.c. |
| 50 | * |
| 51 | * \par Usage |
| 52 | * |
| 53 | * -# Initialize the PIO interrupt mechanism using PIO_InitializeInterrupts() |
| 54 | * with the desired priority (0 ... 7). |
| 55 | * -# Configure a status change interrupt on one or more pin(s) with |
| 56 | * PIO_ConfigureIt(). |
| 57 | * -# Enable & disable interrupts on pins using PIO_EnableIt() and |
| 58 | * PIO_DisableIt(). |
| 59 | */ |
| 60 | |
| 61 | #ifndef _PIO_IT_ |
| 62 | #define _PIO_IT_ |
| 63 | |
| 64 | /* |
| 65 | * Headers |
| 66 | */ |
| 67 | |
| 68 | #include "pio.h" |
| 69 | |
| 70 | #ifdef __cplusplus |
| 71 | extern "C" { |
| 72 | #endif |
| 73 | |
| 74 | /* |
| 75 | * Global functions |
| 76 | */ |
| 77 | |
| 78 | extern void PIO_InitializeInterrupts( uint32_t dwPriority ) ; |
| 79 | |
| 80 | extern void PIO_ConfigureIt( const Pin *pPin, void (*handler)( const Pin* ) ) ; |
| 81 | |
| 82 | extern void PIO_EnableIt( const Pin *pPin ) ; |
| 83 | |
| 84 | extern void PIO_DisableIt( const Pin *pPin ) ; |
| 85 | |
| 86 | extern void PIO_IT_InterruptHandler( void ) ; |
| 87 | |
| 88 | extern void PioInterruptHandler( uint32_t id, Pio *pPio ) ; |
| 89 | |
| 90 | extern void PIO_CaptureHandler( void ) ; |
| 91 | |
| 92 | #ifdef __cplusplus |
| 93 | } |
| 94 | #endif |
| 95 | |
| 96 | #endif /* #ifndef _PIO_IT_ */ |
| 97 | |