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
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Maurus Cuelenaere
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "button.h"
#include "button-target.h"
#include "touchscreen.h"
#include "string.h"
#include "logf.h"
/* Size of the 'dead zone' around each 3x3 button */
#define BUTTON_MARGIN_X (int)(LCD_WIDTH * 0.03)
#define BUTTON_MARGIN_Y (int)(LCD_HEIGHT * 0.03)
static enum touchscreen_mode current_mode = TOUCHSCREEN_POINT;
static const int touchscreen_buttons[3][3] =
{
{BUTTON_TOPLEFT, BUTTON_TOPMIDDLE, BUTTON_TOPRIGHT},
{BUTTON_MIDLEFT, BUTTON_CENTER, BUTTON_MIDRIGHT},
{BUTTON_BOTTOMLEFT, BUTTON_BOTTOMMIDDLE, BUTTON_BOTTOMRIGHT}
};
#ifndef DEFAULT_TOUCHSCREEN_CALIBRATION
#define DEFAULT_TOUCHSCREEN_CALIBRATION { .A=1, .B=0, .C=0, \
.D=0, .E=1, .F=0, \
.divider=1 }
#endif
struct touchscreen_parameter calibration_parameters
= DEFAULT_TOUCHSCREEN_CALIBRATION;
const struct touchscreen_parameter default_calibration_parameters
= DEFAULT_TOUCHSCREEN_CALIBRATION;
void touchscreen_disable_mapping(void)
{
#define C(x) calibration_parameters.x
C(A) = C(E) = 1;
C(B) = C(C) = C(D) = C(F) = 0;
C(divider) = 1;
#undef C
}
void touchscreen_reset_mapping(void)
{
memcpy(&calibration_parameters, &default_calibration_parameters,
sizeof(struct touchscreen_parameter));
}
int touchscreen_calibrate(struct touchscreen_calibration *cal)
{
#define C(x) calibration_parameters.x /* Calibration */
#define S(i,j) cal->i[j][0] /* Screen */
#define D(i,j) cal->i[j][1] /* Display */
long divider = (S(x,0) - S(x,2)) * (S(y,1) - S(y,2)) -
(S(x,1) - S(x,2)) * (S(y,0) - S(y,2));
if(divider == 0)
return -1;
else
C(divider) = divider;
C(A) = (D(x,0) - D(x,2)) * (S(y,1) - S(y,2)) -
(D(x,1) - D(x,2)) * (S(y,0) - S(y,2));
C(B) = (S(x,0) - S(x,2)) * (D(x,1) - D(x,2)) -
(D(x,0) - D(x,2)) * (S(x,1) - S(x,2));
C(C) = S(y,0) * (S(x,2) * D(x,1) - S(x,1) * D(x,2)) +
S(y,1) * (S(x,0) * D(x,2) - S(x,2) * D(x,0)) +
S(y,2) * (S(x,1) * D(x,0) - S(x,0) * D(x,1));
C(D) = (D(y,0) - D(y,2)) * (S(y,1) - S(y,2)) -
(D(y,1) - D(y,2)) * (S(y,0) - S(y,2));
C(E) = (S(x,0) - S(x,2)) * (D(y,1) - D(y,2)) -
(D(y,0) - D(y,2)) * (S(x,1) - S(x,2));
C(F) = S(y,0) * (S(x,2) * D(y,1) - S(x,1) * D(y,2)) +
S(y,1) * (S(x,0) * D(y,2) - S(x,2) * D(y,0)) +
S(y,2) * (S(x,1) * D(y,0) - S(x,0) * D(y,1));
logf("A: %lX B: %lX C: %lX", C(A), C(B), C(C));
logf("D: %lX E: %lX F: %lX", C(D), C(E), C(F));
logf("divider: %lX", C(divider));
return 0;
#undef C
#undef S
#undef D
}
static void map_pixels(int *x, int *y)
{
#define C(x) calibration_parameters.x
int _x = *x, _y = *y;
*x = (C(A) * _x + C(B) * _y + C(C)) / C(divider);
*y = (C(D) * _x + C(E) * _y + C(F)) / C(divider);
#undef C
}
/* TODO: add jitter (and others) filter */
int touchscreen_to_pixels(int x, int y, int *data)
{
x &= 0xFFFF;
y &= 0xFFFF;
map_pixels(&x, &y);
if (current_mode == TOUCHSCREEN_BUTTON)
{
int column = 0, row = 0;
if (x < LCD_WIDTH/3 - BUTTON_MARGIN_X)
column = 0;
else if (x > LCD_WIDTH/3 + BUTTON_MARGIN_X &&
x < 2*LCD_WIDTH/3 - BUTTON_MARGIN_X)
column = 1;
else if (x > 2*LCD_WIDTH/3 + BUTTON_MARGIN_X)
column = 2;
else
return BUTTON_NONE;
if (y < LCD_HEIGHT/3 - BUTTON_MARGIN_Y)
row = 0;
else if (y > LCD_HEIGHT/3 + BUTTON_MARGIN_Y &&
y < 2*LCD_HEIGHT/3 - BUTTON_MARGIN_Y)
row = 1;
else if (y > 2*LCD_HEIGHT/3 + BUTTON_MARGIN_Y)
row = 2;
else
return BUTTON_NONE;
return touchscreen_buttons[row][column];
}
else
{
*data = (x << 16 | y);
return BUTTON_TOUCHSCREEN;
}
}
void touchscreen_set_mode(enum touchscreen_mode mode)
{
current_mode = mode;
}
enum touchscreen_mode touchscreen_get_mode(void)
{
return current_mode;
}
|
