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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Karl Kurbjun
*
* 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"
#include "tsc2100.h"
#include "kernel.h"
unsigned short current_bat2 = 4100;
unsigned short current_aux = 4100;
static unsigned short current_voltage = 4100;
/* This specifies the battery level that writes are still safe */
const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
{
3600
};
/* Below this the player cannot be considered to operate reliably */
const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
{
3580
};
/* Right now these are linear translations, it would be good to model them
* appropriate to the actual battery curve.
*/
/* 6.10 format */
/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
{
{ 3600, 3650, 3700, 3750, 3800, 3850, 3900, 3950, 4000, 4090, 4150 },
};
/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
const unsigned short percent_to_volt_charge[11] =
{
4000, 4105, 4210, 4315, 4420, 4525, 4630, 4735, 4840, 4945, 5050,
};
/* Returns battery voltage from ADC [millivolts] */
unsigned int battery_adc_voltage(void)
{
short bat1, bat2, aux;
static unsigned last_tick = 0;
short tsadc;
tsadc=tsc2100_readreg(TSADC_PAGE, TSADC_ADDRESS);
/* Set the TSC2100 to read voltages if not busy with pen */
if(!(tsadc & TSADC_PSTCM))
{
tsc2100_set_mode(true, 0x0B);
last_tick = current_tick;
}
if(tsc2100_read_volt(&bat1, &bat2, &aux))
{
/* Calculation was:
* (val << 10) / 4096 * 6 * 2.5
*/
current_voltage = (short)( (int) (bat1 * 15) >> 2 );
current_bat2 = (short)( (bat2 * 15) >> 2 );
current_aux = (short)( (aux * 15) >> 2 );
}
return current_voltage;
}
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