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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/****************************************************************************
* configs/pcduino-a10/src/a1x_buttons.c
*
* Copyright (C) 2013-2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <nuttx/arch.h>
#include <nuttx/irq.h>
#include <arch/irq.h>
#include <arch/board/board.h>
#include "pcduino_a10.h"
#ifdef CONFIG_ARCH_BUTTONS
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
#ifdef CONFIG_ARCH_IRQBUTTONS
static xcpt_t g_irqbutton[BOARD_NBUTTONS];
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_button_initialize
*
* Description:
* board_button_initialize() must be called to initialize button resources. After
* that, board_buttons() may be called to collect the current state of all
* buttons or up_irqbutton() may be called to register button interrupt
* handlers.
*
****************************************************************************/
void board_button_initialize(void)
{
# warning Missing logic
}
/****************************************************************************
* Name: board_buttons
*
* Description:
* After board_button_initialize() has been called, board_buttons() may be called to
* collect the state of all buttons. board_buttons() returns an 8-bit bit set
* with each bit associated with a button. See the BUTTON* definitions
* above for the meaning of each bit in the returned value.
*
****************************************************************************/
uint8_t board_buttons(void)
{
# warning Missing logic
}
/****************************************************************************
* Name: up_irqbutton
*
* Description:
* This function may be called to register an interrupt handler that will
* be called when a button is depressed or released. The ID value is one
* of the BUTTON* definitions provided above. The previous interrupt
* handler address isreturned (so that it may restored, if so desired).
*
* Configuration Notes:
* Configuration CONFIG_ARCH_IRQBUTTONS must be selected to enable the
* overall GPIO IRQ feature.
*
****************************************************************************/
#ifdef CONFIG_ARCH_IRQBUTTONS
xcpt_t up_irqbutton(int id, xcpt_t irqhandler)
{
xcpt_t oldhandler = NULL;
if (id < BOARD_NBUTTONS)
{
irqstate_t flags;
/* Disable interrupts until we are done. This guarantees that the
* following operations are atomic.
*/
flags = irqsave();
/* Get the old button interrupt handler and save the new one */
oldhandler = g_irqbutton[id];
g_irqbutton[id] = irqhandler;
/* Configure the interrupt */
a1x_pioirq(xxx);
(void)irq_attach(xxx, irqhandler);
a1x_pioirqenable(xxx);
irqrestore(flags);
}
/* Return the old button handler (so that it can be restored) */
return oldhandler;
}
#endif
#endif /* CONFIG_ARCH_BUTTONS */
|