rockbox/firmware/target/arm/rk27xx/ihifi/powermgmt-ihifi760.c
Andrew Ryabinin 5b5f0755d6 Introduce IHIFI760/960 targets.
Change-Id: Ie36e48742c0ed9aa3fd6f49aa034a11d2492327c
2013-12-16 00:45:18 +04:00

65 lines
2.3 KiB
C

/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright © 2013 Andrew Ryabinin
*
* 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 "adc-target.h"
#include "powermgmt.h"
/* Battery voltage calculation and discharge/charge curves for the HiFiMAN HM-60x.
Battery voltage is calculated under the assumption that the adc full-scale
readout represents 3.00V and that the battery ADC channel is fed with
exactly half of the battery voltage (through a resistive divider).
Charge curve have not been calibrated yet.
*/
const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
{
/* TODO: this is just an initial guess */
3350,
};
const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
{
3300,
};
/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
{
/* FIXME: Uncalibrated curve */
{ 3300, 3350, 3433, 3516, 3600, 3683, 3767, 3850, 3933, 4017, 4100 }
};
/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
const unsigned short percent_to_volt_charge[11] =
/* TODO: simple copy of discharge curve */
{ 3300, 3350, 3433, 3516, 3600, 3683, 3767, 3850, 3933, 4017, 4100 };
/* full-scale ADC readout (2^10) in millivolt */
#define BATTERY_SCALE_FACTOR 6100
/* Returns battery voltage from ADC [millivolts] */
int _battery_voltage(void)
{
return (adc_read(ADC_BATTERY) * BATTERY_SCALE_FACTOR) >> 10;
}