56d972ad57
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24153 a1c6a512-1295-4272-9138-f99709370657
72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2002 by Heikki Hannikainen, Uwe Freese
|
|
* Revisions copyright (C) 2005 by Gerald Van Baren
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#include "config.h"
|
|
#include "adc.h"
|
|
#include "powermgmt.h"
|
|
|
|
#define SMLAL(lo, hi, x, y) \
|
|
asm volatile ("smlal %0, %1, %2, %3" \
|
|
: "+r" (lo), "+r" (hi) \
|
|
: "%r" (x), "r" (y))
|
|
|
|
const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
|
|
{
|
|
3550
|
|
};
|
|
|
|
const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
|
|
{
|
|
3500
|
|
};
|
|
|
|
/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
|
|
const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
|
|
{
|
|
{ 3480, 3550, 3590, 3610, 3630, 3650, 3700, 3760, 3800, 3910, 3990 },
|
|
};
|
|
|
|
#if CONFIG_CHARGING
|
|
/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
|
|
const unsigned short percent_to_volt_charge[11] =
|
|
{
|
|
3480, 3550, 3590, 3610, 3630, 3650, 3700, 3760, 3800, 3910, 3990
|
|
};
|
|
#endif /* CONFIG_CHARGING */
|
|
|
|
#define BATTERY_SCALE_FACTOR 4200
|
|
/* full-scale ADC readout (2^10) in millivolt */
|
|
|
|
/* Returns battery voltage from ADC [millivolts] */
|
|
unsigned int battery_adc_voltage(void)
|
|
{
|
|
/* return (adc_read(ADC_UNREG_POWER) * BATTERY_SCALE_FACTOR) >> 10; */
|
|
|
|
/* This may be overly complicated (pulled from the OF) */
|
|
int lo = 0;
|
|
int val = adc_read(ADC_UNREG_POWER) * BATTERY_SCALE_FACTOR;
|
|
|
|
SMLAL(lo, val, 0x8a42f871, val);
|
|
val>>= 9;
|
|
val -= (val >> 31);
|
|
return val;
|
|
}
|