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ADC driver for iAudio X5

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8811 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2006-02-23 16:40:41 +00:00
parent 8e8e9c3990
commit 01ece88198
3 changed files with 77 additions and 17 deletions
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16
firmware/drivers/adc.c
View file

@ -332,19 +332,3 @@ void adc_init(void)
}
#endif
#ifdef IAUDIO_X5
unsigned char adc_scan(int channel)
{
return 0;
}
unsigned short adc_read(int channel)
{
return 0;
}
void adc_init(void)
{
}
#endif

10
firmware/export/adc.h
View file

@ -21,7 +21,15 @@
#include "config.h"
#if defined(IRIVER_H100_SERIES) || defined(IRIVER_H300_SERIES)
#ifdef IAUDIO_X5
#define NUM_ADC_CHANNELS 3
#define ADC_BUTTONS 0
#define ADC_REMOTE 1
#define ADC_BATTERY 2
#define ADC_UNREG_POWER ADC_BATTERY /* For compatibility */
#elif defined(IRIVER_H100_SERIES) || defined(IRIVER_H300_SERIES)
#define NUM_ADC_CHANNELS 4
#define ADC_BUTTONS 0

68
firmware/target/coldfire/iaudio/x5/adc-x5.c Executable file
View file

@ -0,0 +1,68 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Linus Nielsen Feltzing
*
* 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"
#include "pcf50606.h"
static unsigned char adcdata[NUM_ADC_CHANNELS];
static int channelnum[] =
{
5, /* ADC_BUTTONS (ADCIN2) */
6, /* ADC_REMOTE (ADCIN3) */
0, /* ADC_BATTERY (BATVOLT, resistive divider) */
};
unsigned char adc_scan(int channel)
{
unsigned char data;
pcf50606_write(0x2f, 0x80 | (channelnum[channel] << 1) | 1);
data = pcf50606_read(0x30);
adcdata[channel] = data;
return data;
}
unsigned short adc_read(int channel)
{
return adcdata[channel];
}
static int adc_counter;
static void adc_tick(void)
{
if(++adc_counter == HZ)
{
adc_counter = 0;
adc_scan(ADC_BATTERY);
}
}
void adc_init(void)
{
adc_scan(ADC_BATTERY);
tick_add_task(adc_tick);
}