diff options
Diffstat (limited to 'firmware/target/sh/archos/recorder/button-recorder.c')
-rwxr-xr-x | firmware/target/sh/archos/recorder/button-recorder.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/firmware/target/sh/archos/recorder/button-recorder.c b/firmware/target/sh/archos/recorder/button-recorder.c new file mode 100755 index 0000000000..dc43cce0e0 --- /dev/null +++ b/firmware/target/sh/archos/recorder/button-recorder.c | |||
@@ -0,0 +1,108 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2006 by Jens Arnold | ||
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 "config.h" | ||
21 | #include "system.h" | ||
22 | #include "button.h" | ||
23 | #include "backlight.h" | ||
24 | #include "adc.h" | ||
25 | |||
26 | /* | ||
27 | Recorder hardware button hookup | ||
28 | =============================== | ||
29 | |||
30 | F1, F2, F3, UP: connected to AN4 through a resistor network | ||
31 | DOWN, PLAY, LEFT, RIGHT: likewise connected to AN5 | ||
32 | |||
33 | The voltage on AN4/ AN5 depends on which keys (or key combo) is pressed | ||
34 | |||
35 | ON: PB8, low active | ||
36 | OFF: PB4, low active | ||
37 | */ | ||
38 | |||
39 | void button_init_device(void) | ||
40 | { | ||
41 | /* Set PB4 and PB8 as input pins */ | ||
42 | PBCR1 &= 0xfffc; /* PB8MD = 00 */ | ||
43 | PBCR2 &= 0xfcff; /* PB4MD = 00 */ | ||
44 | PBIOR &= ~0x0110; /* Inputs */ | ||
45 | } | ||
46 | |||
47 | int button_read_device(void) | ||
48 | { | ||
49 | int btn = BUTTON_NONE; | ||
50 | int data; | ||
51 | static int off_button_count = 0; | ||
52 | |||
53 | /* check F1..F3 and UP */ | ||
54 | data = adc_read(ADC_BUTTON_ROW1); | ||
55 | if (data >= 250) | ||
56 | { | ||
57 | if (data >= 700) | ||
58 | if (data >= 900) | ||
59 | btn = BUTTON_F3; | ||
60 | else | ||
61 | btn = BUTTON_UP; | ||
62 | else | ||
63 | if (data >= 500) | ||
64 | btn = BUTTON_F2; | ||
65 | else | ||
66 | btn = BUTTON_F1; | ||
67 | } | ||
68 | |||
69 | /* Some units have mushy keypads, so pressing UP also activates | ||
70 | the Left/Right buttons. Let's combat that by skipping the AN5 | ||
71 | checks when UP is pressed. */ | ||
72 | if(!(btn & BUTTON_UP)) | ||
73 | { | ||
74 | /* check DOWN, PLAY, LEFT, RIGHT */ | ||
75 | data = adc_read(ADC_BUTTON_ROW2); | ||
76 | if (data >= 250) | ||
77 | { | ||
78 | if (data >= 700) | ||
79 | if (data >= 900) | ||
80 | btn |= BUTTON_DOWN; | ||
81 | else | ||
82 | btn |= BUTTON_PLAY; | ||
83 | else | ||
84 | if (data >= 500) | ||
85 | btn |= BUTTON_LEFT; | ||
86 | else | ||
87 | btn |= BUTTON_RIGHT; | ||
88 | } | ||
89 | } | ||
90 | |||
91 | /* check port B pins for ON and OFF */ | ||
92 | data = PBDR; | ||
93 | if ((data & 0x0100) == 0) | ||
94 | btn |= BUTTON_ON; | ||
95 | |||
96 | if ((data & 0x0010) == 0) | ||
97 | { | ||
98 | /* When the batteries are low, the low-battery shutdown logic causes | ||
99 | * spurious OFF events due to voltage fluctuation on some units. | ||
100 | * Only accept OFF when read several times in sequence. */ | ||
101 | if (++off_button_count > 3) | ||
102 | btn |= BUTTON_OFF; | ||
103 | } | ||
104 | else | ||
105 | off_button_count = 0; | ||
106 | |||
107 | return btn; | ||
108 | } | ||