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
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006-2007 Robert Keevil
*
* 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 "thread.h"
#include "system.h"
#include "kernel.h"
#include "usb.h"
#include "logf.h"
#include "piezo.h"
static long piezo_stack[DEFAULT_STACK_SIZE/sizeof(long)];
static const char piezo_thread_name[] = "piezo";
static struct event_queue piezo_queue;
static unsigned int duration;
static bool beeping;
enum {
Q_PIEZO_BEEP = 1,
Q_PIEZO_BEEP_FOR_TICK,
Q_PIEZO_BEEP_FOR_USEC,
Q_PIEZO_STOP
};
static inline void piezo_hw_init(void)
{
#ifndef SIMULATOR
/*logf("PIEZO: hw_init");*/
outl(inl(0x70000010) & ~0xc, 0x70000010);
outl(inl(0x6000600c) | 0x20000, 0x6000600c); /* enable device */
#endif
}
static void piezo_hw_tick(unsigned int form_and_period)
{
#ifndef SIMULATOR
outl(0x80000000 | form_and_period, 0x7000a000); /* set pitch */
#endif
}
static inline void piezo_hw_stop(void)
{
#ifndef SIMULATOR
outl(0x0, 0x7000a000); /* piezo off */
#endif
}
static void piezo_thread(void)
{
struct queue_event ev;
long piezo_usec_off;
while(1)
{
queue_wait(&piezo_queue, &ev);
switch(ev.id)
{
case Q_PIEZO_BEEP:
piezo_hw_tick((unsigned int)ev.data);
beeping = true;
break;
case Q_PIEZO_BEEP_FOR_TICK:
piezo_hw_tick((unsigned int)ev.data);
beeping = true;
sleep(duration);
if (beeping)
piezo_hw_stop();
beeping = false;
/* remove anything that appeared while sleeping */
queue_clear(&piezo_queue);
break;
case Q_PIEZO_BEEP_FOR_USEC:
piezo_usec_off = USEC_TIMER + duration;
piezo_hw_tick((unsigned int)ev.data);
beeping = true;
while (TIME_BEFORE(USEC_TIMER, piezo_usec_off))
if (duration >= 5000) yield();
if (beeping)
piezo_hw_stop();
beeping = false;
/* remove anything that appeared while sleeping */
queue_clear(&piezo_queue);
break;
case Q_PIEZO_STOP:
if (beeping)
piezo_hw_stop();
beeping = false;
break;
#ifndef SIMULATOR
case SYS_USB_CONNECTED:
/*logf("USB: Piezo core");*/
piezo_hw_stop();
queue_clear(&piezo_queue);
usb_acknowledge(SYS_USB_CONNECTED_ACK);
usb_wait_for_disconnect(&piezo_queue);
break ;
#endif
case SYS_TIMEOUT:
break;
}
yield();
}
}
void piezo_play(unsigned short inv_freq, unsigned char form)
{
queue_post(&piezo_queue, Q_PIEZO_BEEP,
(intptr_t)((unsigned int)form << 16 | inv_freq));
}
void piezo_play_for_tick(unsigned short inv_freq,
unsigned char form, unsigned int dur)
{
duration = dur;
queue_post(&piezo_queue, Q_PIEZO_BEEP_FOR_TICK,
(intptr_t)((unsigned int)form << 16 | inv_freq));
}
void piezo_play_for_usec(unsigned short inv_freq,
unsigned char form, unsigned int dur)
{
duration = dur;
queue_post(&piezo_queue, Q_PIEZO_BEEP_FOR_USEC,
(intptr_t)((unsigned int)form << 16 | inv_freq));
}
void piezo_stop(void)
{
queue_post(&piezo_queue, Q_PIEZO_STOP, 0);
}
void piezo_clear(void)
{
queue_clear(&piezo_queue);
piezo_stop();
}
bool piezo_busy(void)
{
return !queue_empty(&piezo_queue);
}
/* conversion factor based on the following data
period Hz
10 8547
20 4465
30 3024
40 2286
50 1846
60 1537
70 1320
80 1165
90 1030
100 928
someone with better recording/analysing equipment should be able
to get more accurate figures
*/
unsigned int piezo_hz(unsigned int hz)
{
if (hz > 0)
return 91225/hz;
else
return 0;
}
void piezo_init(void)
{
/*logf("PIEZO: init");*/
piezo_hw_init();
queue_init(&piezo_queue, true);
create_thread(piezo_thread, piezo_stack, sizeof(piezo_stack), 0,
piezo_thread_name IF_PRIO(, PRIORITY_REALTIME)
IF_COP(, CPU));
}
void piezo_button_beep(bool beep, bool force)
{
/* old on clickwheel action - piezo_play_for_usec(50, 0x80, 400);
old on button action - piezo_play_for_usec(50, 0x80, 3000); */
if (force)
piezo_clear();
if (queue_empty(&piezo_queue))
{
if (beep)
piezo_play_for_tick(40, 0x80, HZ/5);
else
piezo_play_for_usec(91, 0x80, 4000);
}
}
|
