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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
/****************************************************************************
* configs/sure-pic32mx/src/up_buttons.c
*
* Copyright (C) 2011 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 <stdbool.h>
#include <debug.h>
#include <arch/board/board.h>
#include "chip.h"
#include "up_arch.h"
#include "pic32mx-internal.h"
#include "pic32mx-ioport.h"
#include "pic32mx-adc.h"
#include "sure-internal.h"
#ifdef CONFIG_ARCH_BUTTONS
/****************************************************************************
* Definitions
****************************************************************************/
/* The Sure DB_DP11215 PIC32 Storage Demo Board has three buttons.
*
* SW1 (SW_UP, left arrow) RB3 Pulled high, Grounded/low when depressed
* SW2 (SW_DOWN, down/right arrow) RB2 Pulled high, Grounded/low when depressed
* SW3 (SW_OK, right arrow) RB4 Pulled high, Grounded/low when depressed
*
* The Sure DB-DP11212 PIC32 General Purpose Demo Board also has three buttons,
* but these are connected differently:
*
* SW2-1 RF0 Pulled high, Grounded/low when depressed
* SW3-1 RF1 Pulled high, Grounded/low when depressed
* SW5-1 RD6 Pulled high, Grounded/low when depressed
*
* Internal pull-ups are not required since the LEDs are pull-up externally.
* Change notification interrupts are not *automatically* enabled. Change
* notification will be enabled when pic32mx_gpioattach() is called.
*/
#ifdef CONFIG_ARCH_DBDP11215
# define GPIO_SW1 (GPIO_INPUT|GPIO_INT|GPIO_PORTB|GPIO_PIN3)
# define GPIO_SW2 (GPIO_INPUT|GPIO_INT|GPIO_PORTB|GPIO_PIN2)
# define GPIO_SW3 (GPIO_INPUT|GPIO_INT|GPIO_PORTB|GPIO_PIN4)
#else /* CONFIG_ARCH_DBDP11212 */
# define GPIO_SW1 (GPIO_INPUT|GPIO_INT|GPIO_PORTF|GPIO_PIN0)
# define GPIO_SW2 (GPIO_INPUT|GPIO_INT|GPIO_PORTF|GPIO_PIN1)
# define GPIO_SW3 (GPIO_INPUT|GPIO_INT|GPIO_PORTD|GPIO_PIN6)
#endif
/* Change notification numbers:
* RB3 -> CN5
* RB2 -> CN2
* RB4 -> CN6
*/
#define CN_SW1 5
#define CN_SW2 2
#define CN_SW3 6
/****************************************************************************
* Private Data
****************************************************************************/
/* Pin configuration for each button */
static const uint16_t g_buttonset[NUM_BUTTONS] =
{
GPIO_SW1 GPIO_SW2, GPIO_SW3
}
/* Change notification number for each button */
#ifdef CONFIG_ARCH_IRQBUTTONS
static const uint8_t g_buttoncn[NUM_BUTTONS] =
{
CN_SW1, CN_SW2, CN_SW3
}
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_buttoninit
*
* Description:
* up_buttoninit() must be called to initialize button resources. After
* that, up_buttons() may be called to collect the current state of all
* buttons or up_irqbutton() may be called to register button interrupt
* handlers.
*
****************************************************************************/
void up_buttoninit(void)
{
int i;
/* Configure input pins */
for (i = 0; i < NUM_BUTTONS; i++)
{
pic32mx_configgpio(g_buttonset[i]);
}
/* Change AN2/AN3/AN4 to digital */
putreg32(0xffff, PIC32MX_ADC_CFG);
}
/****************************************************************************
* Name: up_buttons
****************************************************************************/
uint8_t up_buttons(void)
{
uint8_t ret = 0;
int id;
/* Configure input pins */
for (id = 0; id < NUM_BUTTONS; id++)
{
if (pic32mx_gpioread(g_buttonset[id]))
{
ret |= (1 << id);
}
}
return ret;
}
/************************************************************************************
* Button support.
*
* Description:
* up_buttoninit() must be called to initialize button resources. After
* that, up_buttons() may be called to collect the current state of all
* buttons or up_irqbutton() may be called to register button interrupt
* handlers.
*
* After up_buttoninit() has been called, up_buttons() may be called to
* collect the state of all buttons. up_buttons() returns an 8-bit bit set
* with each bit associated with a button. See the BUTTON_*_BIT and JOYSTICK_*_BIT
* definitions in board.h for the meaning of each bit.
*
* up_irqbutton() may be called to register an interrupt handler that will
* be called when a button is depressed or released. The ID value is a
* button enumeration value that uniquely identifies a button resource. See the
* BUTTON_* and JOYSTICK_* definitions in board.h for the meaning of enumeration
* value. The previous interrupt handler address is returned (so that it may
* restored, if so desired).
*
* Interrupts are automatically enabled when the button handler is attached and
* automatically disabled when the button handler is detached.
*
* When an interrupt occurs, it is due to a change on the GPIO input pin
* associated with the button. In that case, all attached change
* notification handlers will be called. Each handler must maintain state
* and determine if the unlying GPIO button input value changed.
*
************************************************************************************/
#ifdef CONFIG_ARCH_IRQBUTTONS
xcpt_t up_irqbutton(int id, xcpt_t irqhandler)
{
xcpt_t oldhandler = NULL;
if (id < NUM_BUTTONS)
{
oldhandler = pic32mx_gpioattach(g_buttonset[id], g_buttoncn[id], irqhandler);
if (irqbuttron)
{
pic32mx_gpioirqenable(g_buttoncn[id]);
}
}
return oldhandler;
}
#endif
#endif /* CONFIG_ARCH_BUTTONS */
|