1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/* ----------------------------------------------------------------------------
* 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_ */
|
