5d5bab7ed4
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19998 a1c6a512-1295-4272-9138-f99709370657
72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Heikki Hannikainen, Uwe Freese
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* Revisions copyright (C) 2005 by Gerald Van Baren
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "adc.h"
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#include "powermgmt.h"
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#define SMLAL(lo, hi, x, y) \
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asm volatile ("smlal %0, %1, %2, %3" \
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: "+r" (lo), "+r" (hi) \
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: "%r" (x), "r" (y))
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const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
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{
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3550
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};
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const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
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{
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3500
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};
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/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
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const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
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{
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{ 3480, 3550, 3590, 3610, 3630, 3650, 3700, 3760, 3800, 3910, 3990 },
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};
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#if CONFIG_CHARGING
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/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
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const unsigned short percent_to_volt_charge[11] =
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{
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3480, 3550, 3590, 3610, 3630, 3650, 3700, 3760, 3800, 3910, 3990
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};
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#endif /* CONFIG_CHARGING */
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#define BATTERY_SCALE_FACTOR 4200
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/* full-scale ADC readout (2^10) in millivolt */
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/* Returns battery voltage from ADC [millivolts] */
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unsigned int battery_adc_voltage(void)
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{
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/* return (adc_read(ADC_UNREG_POWER) * BATTERY_SCALE_FACTOR) >> 10; */
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/* This may be overly complicated (pulled from the OF) */
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int lo = 0;
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int val = adc_read(ADC_UNREG_POWER) * BATTERY_SCALE_FACTOR;
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SMLAL(lo, val, 0x8a42f871, val);
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val>>= 9;
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val -= (val >> 31);
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return val;
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}
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