diff options
Diffstat (limited to 'firmware/target/arm/adc-as3514.c')
-rw-r--r-- | firmware/target/arm/adc-as3514.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/firmware/target/arm/adc-as3514.c b/firmware/target/arm/adc-as3514.c new file mode 100644 index 0000000000..dcf6cba26e --- /dev/null +++ b/firmware/target/arm/adc-as3514.c | |||
@@ -0,0 +1,53 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2006 by Barry Wardell | ||
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 "adc.h" | ||
20 | #include "kernel.h" | ||
21 | #include "i2c-pp.h" | ||
22 | #include "as3514.h" | ||
23 | |||
24 | /* Read 10-bit channel data */ | ||
25 | unsigned short adc_read(int channel) | ||
26 | { | ||
27 | unsigned short data = 0; | ||
28 | |||
29 | if ((unsigned)channel < NUM_ADC_CHANNELS) | ||
30 | { | ||
31 | i2c_lock(); | ||
32 | |||
33 | /* Select channel */ | ||
34 | if (pp_i2c_send( AS3514_I2C_ADDR, AS3514_ADC_0, (channel << 4)) >= 0) | ||
35 | { | ||
36 | unsigned char buf[2]; | ||
37 | |||
38 | /* Read data */ | ||
39 | if (i2c_readbytes( AS3514_I2C_ADDR, AS3514_ADC_0, 2, buf) >= 0) | ||
40 | { | ||
41 | data = (((buf[0] & 0x3) << 8) | buf[1]); | ||
42 | } | ||
43 | } | ||
44 | |||
45 | i2c_unlock(); | ||
46 | } | ||
47 | |||
48 | return data; | ||
49 | } | ||
50 | |||
51 | void adc_init(void) | ||
52 | { | ||
53 | } | ||