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62 lines
2.1 KiB
C
62 lines
2.1 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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#include "hwcompat.h"
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/* FIXME: Properly calibrate values. Current values "inherited" from
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* iriver H100 */
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unsigned short battery_level_disksafe = 3380;
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unsigned short battery_level_shutoff = 3020;
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/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
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unsigned short percent_to_volt_discharge[11] =
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{
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3370, 3650, 3700, 3740, 3780, 3820, 3870, 3930, 4000, 4080, 4160
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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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unsigned short percent_to_volt_charge[11] =
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{
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3540, 3860, 3930, 3980, 4000, 4020, 4040, 4080, 4130, 4180, 4230
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};
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#endif /* CONFIG_CHARGING */
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#define BATTERY_SCALE_FACTOR_1G 4200
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#define BATTERY_SCALE_FACTOR_2G 6630
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/* full-scale ADC readout (2^8) in millivolt */
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/* Returns battery voltage from ADC [millivolts] */
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int _battery_voltage(void)
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{
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unsigned adcval = adc_read(ADC_UNREG_POWER);
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if ((IPOD_HW_REVISION >> 16) != 2)
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return (adcval * BATTERY_SCALE_FACTOR_1G) >> 8;
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else
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return (adcval * BATTERY_SCALE_FACTOR_2G) >> 8;
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}
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