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author | Jonathan Gordon <rockbox@jdgordon.info> | 2011-11-16 10:25:43 +0000 |
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committer | Jonathan Gordon <rockbox@jdgordon.info> | 2011-11-16 10:25:43 +0000 |
commit | be716c0be80e3f64a81a3f19b683db40489f47a1 (patch) | |
tree | bc461ad1de8b5fda6c3c14d0cfd737bdc69ddc83 /firmware/target/arm/s5l8700/ipodnano2g/piezo-nano2g.c | |
parent | b7508a766df991539bec5e10fd7739001c1fdb99 (diff) | |
download | rockbox-be716c0be80e3f64a81a3f19b683db40489f47a1.tar.gz rockbox-be716c0be80e3f64a81a3f19b683db40489f47a1.zip |
Finally commit FS#5111 - piezo clicker for ipods!
Origional implementation by Robert Keevil with contributions from Frederik Vestre, Stoyan Stratev, Craig Elliott, Michael Sparmann, Thomas Schott, Rosso Maltese, and syncs from a bunch of other people!
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30995 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/arm/s5l8700/ipodnano2g/piezo-nano2g.c')
-rw-r--r-- | firmware/target/arm/s5l8700/ipodnano2g/piezo-nano2g.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/firmware/target/arm/s5l8700/ipodnano2g/piezo-nano2g.c b/firmware/target/arm/s5l8700/ipodnano2g/piezo-nano2g.c new file mode 100644 index 0000000000..d555b7232f --- /dev/null +++ b/firmware/target/arm/s5l8700/ipodnano2g/piezo-nano2g.c | |||
@@ -0,0 +1,95 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2006-2007 Robert Keevil | ||
11 | * | ||
12 | * All files in this archive are subject to the GNU General Public License. | ||
13 | * See the file COPYING in the source tree root for full license agreement. | ||
14 | * | ||
15 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
16 | * KIND, either express or implied. | ||
17 | * | ||
18 | ****************************************************************************/ | ||
19 | |||
20 | #include "system.h" | ||
21 | #include "kernel.h" | ||
22 | #include "piezo.h" | ||
23 | |||
24 | static unsigned int duration; | ||
25 | static bool beeping; | ||
26 | |||
27 | void INT_TIMERD(void) | ||
28 | { | ||
29 | /* clear interrupt */ | ||
30 | TDCON = TDCON; | ||
31 | if (!(--duration)) | ||
32 | { | ||
33 | beeping = 0; | ||
34 | TDCMD = (1 << 1); /* TD_CLR */ | ||
35 | } | ||
36 | } | ||
37 | |||
38 | void piezo_start(unsigned short cycles, unsigned short periods) | ||
39 | { | ||
40 | #ifndef SIMULATOR | ||
41 | duration = periods; | ||
42 | beeping = 1; | ||
43 | /* configure timer for 100 kHz */ | ||
44 | TDCMD = (1 << 1); /* TD_CLR */ | ||
45 | TDPRE = 30 - 1; /* prescaler */ | ||
46 | TDCON = (1 << 13) | /* TD_INT1_EN */ | ||
47 | (0 << 12) | /* TD_INT0_EN */ | ||
48 | (0 << 11) | /* TD_START */ | ||
49 | (2 << 8) | /* TD_CS = PCLK / 16 */ | ||
50 | (1 << 4); /* TD_MODE_SEL = PWM mode */ | ||
51 | TDDATA0 = cycles; /* set interval period */ | ||
52 | TDDATA1 = cycles << 1; /* set interval period */ | ||
53 | TDCMD = (1 << 0); /* TD_EN */ | ||
54 | |||
55 | /* enable timer interrupt */ | ||
56 | INTMSK |= INTMSK_TIMERD; | ||
57 | #endif | ||
58 | } | ||
59 | |||
60 | void piezo_stop(void) | ||
61 | { | ||
62 | #ifndef SIMULATOR | ||
63 | TDCMD = (1 << 1); /* TD_CLR */ | ||
64 | #endif | ||
65 | } | ||
66 | |||
67 | void piezo_clear(void) | ||
68 | { | ||
69 | piezo_stop(); | ||
70 | } | ||
71 | |||
72 | bool piezo_busy(void) | ||
73 | { | ||
74 | return beeping; | ||
75 | } | ||
76 | |||
77 | void piezo_init(void) | ||
78 | { | ||
79 | beeping = 0; | ||
80 | } | ||
81 | |||
82 | void piezo_button_beep(bool beep, bool force) | ||
83 | { | ||
84 | if (force) | ||
85 | while (beeping) | ||
86 | yield(); | ||
87 | |||
88 | if (!beeping) | ||
89 | { | ||
90 | if (beep) | ||
91 | piezo_start(22, 457); | ||
92 | else | ||
93 | piezo_start(40, 4); | ||
94 | } | ||
95 | } | ||