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
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 Philipp Pertermann
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "plugin.h"
#ifdef HAVE_LCD_BITMAP
#ifndef SIMULATOR /* don't want this code in the simulator */
/* The different drawing modes */
#define DRAW_MODE_FILLED 0
#define DRAW_MODE_OUTLINE 1
#define DRAW_MODE_PIXEL 2
#define DRAW_MODE_COUNT 3
#define MAX_PEAK 0x8000
/* variable button definitions */
#if CONFIG_KEYPAD == RECORDER_PAD
#define OSCILLOGRAPH_QUIT BUTTON_OFF
#define OSCILLOGRAPH_SPEED_UP BUTTON_UP
#define OSCILLOGRAPH_SPEED_DOWN BUTTON_DOWN
#define OSCILLOGRAPH_ROLL BUTTON_F1
#define OSCILLOGRAPH_MODE BUTTON_F2
#define OSCILLOGRAPH_SPEED_RESET BUTTON_F3
#define OSCILLOGRAPH_PAUSE BUTTON_PLAY
#elif CONFIG_KEYPAD == ONDIO_PAD
#define OSCILLOGRAPH_QUIT BUTTON_OFF
#define OSCILLOGRAPH_SPEED_UP BUTTON_UP
#define OSCILLOGRAPH_SPEED_DOWN BUTTON_DOWN
#define OSCILLOGRAPH_ROLL BUTTON_RIGHT
#define OSCILLOGRAPH_MODE BUTTON_MENU
#define OSCILLOGRAPH_SPEED_RESET BUTTON_LEFT
#endif
/* global api struct pointer */
static struct plugin_api* rb;
/* number of ticks between two volume samples */
static int speed = 1;
/* roll == true -> lcd rolls */
static bool roll = true;
/* see DRAW_MODE_XXX constants for valid values */
static int drawMode = DRAW_MODE_FILLED;
/**
* cleanup on return / usb
*/
void cleanup(void *parameter)
{
(void)parameter;
/* restore to default roll position.
Looks funny if you forget to do this... */
rb->lcd_roll(0);
rb->lcd_update();
}
/**
* Displays a vertically scrolling oscillosgraph using
* hardware scrolling of the display. The user can change
* speed
*/
enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
{
int button;
/* stores current volume value left */
int left;
/* stores current volume value right */
int right;
/* specifies the current position on the lcd */
int y = LCD_WIDTH - 1;
/* only needed when drawing lines */
int lastLeft = 0;
int lastRight = 0;
int lasty = 0;
bool exit = false;
TEST_PLUGIN_API(api);
(void)parameter;
rb = api;
/* the main loop */
while (!exit) {
/* read the volume info from MAS */
left = rb->mas_codec_readreg(0xC) / (MAX_PEAK / (LCD_WIDTH / 2 - 2));
right = rb->mas_codec_readreg(0xD) / (MAX_PEAK / (LCD_WIDTH / 2 - 2));
/* delete current line */
rb->lcd_clearline(0, y, LCD_WIDTH-1, y);
switch (drawMode) {
case DRAW_MODE_FILLED:
rb->lcd_drawline(LCD_WIDTH / 2 + 1 , y,
LCD_WIDTH / 2 + 1 + right, y);
rb->lcd_drawline(LCD_WIDTH / 2 - 1 , y,
LCD_WIDTH / 2 - 1 -left , y);
break;
case DRAW_MODE_OUTLINE:
/* last position needed for lines */
lasty = MAX(y-1, 0);
/* Here real lines were neccessary because
anything else was ugly. */
rb->lcd_drawline(LCD_WIDTH / 2 + right , y,
LCD_WIDTH / 2 + lastRight , lasty);
rb->lcd_drawline(LCD_WIDTH / 2 - left , y,
LCD_WIDTH / 2 - lastLeft, lasty);
/* have to store the old values for drawing lines
the next time */
lastRight = right;
lastLeft = left;
break;
case DRAW_MODE_PIXEL:
/* straight and simple */
rb->lcd_drawpixel(LCD_WIDTH / 2 + right, y);
rb->lcd_drawpixel(LCD_WIDTH / 2 - left, y);
break;
}
/* increment and adjust the drawing position */
y++;
if (y >= LCD_HEIGHT)
y = 0;
/* I roll before update because otherwise the new
line would appear at the wrong end of the display */
if (roll)
rb->lcd_roll(y);
/* now finally make the new sample visible */
rb->lcd_update_rect(0, MAX(y-1, 0), LCD_WIDTH, 2);
/* There are two mechanisms to alter speed:
1.) slowing down is achieved by increasing
the time waiting for user input. This
mechanism uses positive values.
2.) speeding up is achieved by leaving out
the user input check for (-speed) volume
samples. For this mechanism negative values
are used.
*/
if (speed >= 0 || ((speed < 0) && (y % (-speed) == 0))) {
bool draw = false;
/* speed values > 0 slow the oszi down. By user input
speed might become < 1. If a value < 1 was
passed user input would be disabled. Thus
it must be ensured that at least 1 is passed. */
/* react to user input */
button = rb->button_get_w_tmo(MAX(speed, 1));
switch (button) {
case OSCILLOGRAPH_SPEED_UP:
speed++;
draw = true;
break;
case OSCILLOGRAPH_SPEED_DOWN:
speed--;
draw = true;
break;
#ifdef OSCILLOGRAPH_PAUSE
case OSCILLOGRAPH_PAUSE:
/* pause the demo */
rb->button_get(true);
break;
#endif
case OSCILLOGRAPH_ROLL:
/* toggle rolling */
roll = !roll;
break;
case OSCILLOGRAPH_MODE:
/* step through the display modes */
drawMode ++;
drawMode = drawMode % DRAW_MODE_COUNT;
/* lcd buffer might be rolled so that
the transition from LCD_HEIGHT to 0
takes place in the middle of the screen.
That produces ugly results in DRAW_MODE_OUTLINE
mode. If rolling is enabled this change will
be reverted before the next update anyway.*/
rb->lcd_roll(0);
break;
case OSCILLOGRAPH_SPEED_RESET:
speed = 1;
draw = true;
break;
case OSCILLOGRAPH_QUIT:
exit = true;
break;
default:
if (rb->default_event_handler_ex(button, cleanup, NULL)
== SYS_USB_CONNECTED)
return PLUGIN_USB_CONNECTED;
break;
}
if (draw) {
char buf[16];
rb->snprintf(buf, sizeof buf, "Speed: %d", -speed);
rb->lcd_putsxy(0, (y + LCD_HEIGHT - 8) % LCD_HEIGHT, buf);
rb->lcd_update_rect(0, (y + LCD_HEIGHT - 8) % LCD_HEIGHT,
LCD_WIDTH, 8);
}
}
}
cleanup(NULL);
/* standard return */
return PLUGIN_OK;
}
#endif /* #ifndef SIMULATOR */
#endif
|
