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correct battery readout for m200v4. Percentage is still uncalibrated.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19420 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dominik Wenger 2008-12-13 15:57:41 +00:00
parent 2b7fa8736c
commit a654946622
2 changed files with 60 additions and 1 deletions
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2
firmware/SOURCES
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@ -1095,7 +1095,7 @@ target/arm/as3525/powermgmt-as3525.c
target/arm/lcd-ssd1815.c
target/arm/as3525/sansa-m200v4/button-m200v4.c
#ifndef BOOTLOADER
target/arm/as3525/powermgmt-as3525.c
target/arm/as3525/sansa-m200v4/powermgmt-m200v4.c
drivers/generic_i2c.c
target/arm/as3525/fmradio-i2c-as3525.c
#endif /* !BOOTLOADER */

59
firmware/target/arm/as3525/sansa-m200v4/powermgmt-m200v4.c Normal file
View file

@ -0,0 +1,59 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright © 2008 Rafaël Carré
*
* 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"
/* TODO
early uncalibrated values. But read-out value should be correct
*/
const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
{
/* TODO: this is just an initial guess */
900
};
const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
{
/* TODO: this is just an initial guess */
1000
};
/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
{
/* TODO: simple uncalibrated curve, linear except for first 10% */
{ 1000, 1050, 1100, 1150, 1200, 1250, 1300, 1350, 1400, 1450, 1500 }
};
/* ADC should read 0x3ff=5.12V */
#define BATTERY_SCALE_FACTOR 2562
/* full-scale ADC readout (2^10) in millivolt */
/* Returns battery voltage from ADC [millivolts] */
unsigned int battery_adc_voltage(void)
{
return (adc_read(ADC_VBAT) * BATTERY_SCALE_FACTOR) >> 10;
}