blob: 79b1ad0fcb8dc28e313740da495dd365433cc1de (
plain)
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
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Barry Wardell
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "cpu.h"
#include "system.h"
#include "kernel.h"
#include "thread.h"
#include "adc.h"
static unsigned short adcdata[NUM_ADC_CHANNELS];
unsigned short adc_read(int channel)
{
return adcdata[channel];
}
static void adc_tick(void)
{
if (ADCST & 0x10) {
adcdata[0] = ADCCH0 & 0x3ff;
adcdata[1] = ADCCH1 & 0x3ff;
adcdata[2] = ADCCH2 & 0x3ff;
adcdata[3] = ADCCH3 & 0x3ff;
adcdata[4] = ADCCH4 & 0x3ff;
ADCST = 0xa;
}
}
void adc_init(void)
{
ADCR24 = 0xaaaaa;
ADCR28 = 0;
ADCST = 2;
ADCST = 0xa;
while (!(ADCST & 0x10));
adc_tick();
tick_add_task(adc_tick);
}
|
