78d625f840
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19597 a1c6a512-1295-4272-9138-f99709370657
84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id: powermgmt-cowond2.c 17847 2008-06-28 18:10:04Z bagder $
|
|
*
|
|
* 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 "kernel.h"
|
|
#include "pcf50606.h"
|
|
|
|
unsigned short current_voltage = 5150;
|
|
|
|
const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
|
|
{
|
|
/* FIXME: calibrate value */
|
|
4400
|
|
};
|
|
|
|
const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
|
|
{
|
|
/* FIXME: calibrate value */
|
|
4600
|
|
};
|
|
|
|
/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
|
|
const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
|
|
{
|
|
/* FIXME: calibrate values. Table is "inherited" from iPod-PCF / H100 */
|
|
{ 4500, 4810, 4910, 4970, 5030, 5070, 5120, 5140, 5170, 5250, 5400 }
|
|
};
|
|
|
|
#if CONFIG_CHARGING
|
|
/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
|
|
const unsigned short percent_to_volt_charge[11] =
|
|
{
|
|
/* FIXME: calibrate values. Table is "inherited" from iPod-PCF / H100 */
|
|
4760, 5440, 5510, 5560, 5610, 5640, 5660, 5760, 5820, 5840, 5850 /* NiMH */
|
|
};
|
|
#endif /* CONFIG_CHARGING */
|
|
|
|
#define BATTERY_SCALE_FACTOR 6000
|
|
/* full-scale ADC readout (2^10) in millivolt */
|
|
|
|
/* Returns battery voltage from ADC [millivolts] */
|
|
unsigned int battery_adc_voltage(void)
|
|
{
|
|
static unsigned last_tick = 0;
|
|
|
|
if (0 == last_tick || TIME_BEFORE(last_tick+HZ, current_tick))
|
|
{
|
|
int adc_val, irq_status;
|
|
unsigned char buf[2];
|
|
|
|
irq_status = disable_irq_save();
|
|
pcf50606_write(PCF5060X_ADCC2, 0x1);
|
|
pcf50606_read_multiple(PCF5060X_ADCS1, buf, 2);
|
|
restore_interrupt(irq_status);
|
|
|
|
adc_val = (buf[0]<<2) | (buf[1] & 3); //ADCDAT1H+ADCDAT1L
|
|
current_voltage = (adc_val * BATTERY_SCALE_FACTOR) >> 10;
|
|
|
|
last_tick = current_tick;
|
|
}
|
|
|
|
return current_voltage;
|
|
}
|
|
|