diff options
author | Linus Nielsen Feltzing <linus@haxx.se> | 2002-05-16 21:03:57 +0000 |
---|---|---|
committer | Linus Nielsen Feltzing <linus@haxx.se> | 2002-05-16 21:03:57 +0000 |
commit | a2b049006067e47880fae51ff637d5c8021d1683 (patch) | |
tree | 97a322bca0f6f0ee6dfcfaa822cc7443545aa8db | |
parent | 97531e8f6c9cffbbc28d71e575a52c34773f691e (diff) | |
download | rockbox-a2b049006067e47880fae51ff637d5c8021d1683.tar.gz rockbox-a2b049006067e47880fae51ff637d5c8021d1683.zip |
First version
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@604 a1c6a512-1295-4272-9138-f99709370657
-rw-r--r-- | firmware/drivers/dac.c | 68 | ||||
-rw-r--r-- | firmware/drivers/dac.h | 38 |
2 files changed, 106 insertions, 0 deletions
diff --git a/firmware/drivers/dac.c b/firmware/drivers/dac.c new file mode 100644 index 0000000000..0ea47dac89 --- /dev/null +++ b/firmware/drivers/dac.c | |||
@@ -0,0 +1,68 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2002 by Linus Nielsen Feltzing | ||
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 | #include "i2c.h" | ||
20 | #include "debug.h" | ||
21 | #include "dac.h" | ||
22 | |||
23 | int dac_volume(unsigned int volume) | ||
24 | { | ||
25 | int i; | ||
26 | unsigned char buf[16]; | ||
27 | |||
28 | if(volume > 0x38) | ||
29 | volume = 0x38; | ||
30 | |||
31 | i=0; | ||
32 | buf[i++] = DAC_REG_WRITE | DAC_AVOL; | ||
33 | buf[i++] = (volume & 0x3f) | 0x40; /* Deemphasis ON */ | ||
34 | buf[i++] = volume & 0x3f; | ||
35 | |||
36 | /* send read command */ | ||
37 | if (i2c_write(DAC_DEV_WRITE,buf,i)) | ||
38 | { | ||
39 | return -1; | ||
40 | } | ||
41 | return 0; | ||
42 | } | ||
43 | |||
44 | /*************************************************** | ||
45 | ** Bit6: 0 = 3V, 1 = 5V | ||
46 | ** Bit5: 0 = normal, 1 = low power | ||
47 | ** Bit4: 0 = AUX2 off, 1 = AUX2 on | ||
48 | ** Bit3: 0 = AUX1 off, 1 = AUX2 on | ||
49 | ** Bit2: 0 = DAC off, 1 = DAC on | ||
50 | ** Bit1: 0 = stereo, 1 = mono | ||
51 | ** Bit0: 0 = normal right amp, 1 = inverted right amp | ||
52 | ***************************************************/ | ||
53 | int dac_config(int value) | ||
54 | { | ||
55 | int i; | ||
56 | unsigned char buf[16]; | ||
57 | |||
58 | i=0; | ||
59 | buf[i++] = DAC_REG_WRITE | DAC_GCFG; | ||
60 | buf[i++] = value; | ||
61 | |||
62 | /* send read command */ | ||
63 | if (i2c_write(DAC_DEV_WRITE,buf,i)) | ||
64 | { | ||
65 | return -1; | ||
66 | } | ||
67 | return 0; | ||
68 | } | ||
diff --git a/firmware/drivers/dac.h b/firmware/drivers/dac.h new file mode 100644 index 0000000000..c860538a24 --- /dev/null +++ b/firmware/drivers/dac.h | |||
@@ -0,0 +1,38 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2002 by Linus Nielsen Feltzing | ||
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 | #ifndef _DAC_H_ | ||
20 | #define _DAC_H_ | ||
21 | |||
22 | /* | ||
23 | DAC I2C defs | ||
24 | */ | ||
25 | #define DAC_ADR 0x9a | ||
26 | #define DAC_DEV_WRITE (DAC_ADR | 0x00) | ||
27 | |||
28 | #define DAC_REG_WRITE 0xc0 | ||
29 | |||
30 | /* registers..*/ | ||
31 | #define DAC_SR_REG 1 | ||
32 | #define DAC_AVOL 2 | ||
33 | #define DAC_GCFG 3 | ||
34 | |||
35 | extern int dac_volume(unsigned int volume); | ||
36 | extern int dac_config(int value); | ||
37 | |||
38 | #endif | ||