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Added battery charger code for the recorder and battery voltage statistics keeping for all platforms.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1546 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Heikki Hannikainen 2002-08-06 10:50:50 +00:00
parent 82a1cad9b8
commit 3f809e716d
6 changed files with 247 additions and 4 deletions
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4
firmware/config-recorder.h
View file

@ -12,3 +12,7 @@
/* Define this if you have a MAS3587F */
#define HAVE_MAS3587F
/* Define this if you have charging control */
#define HAVE_CHARGE_CTRL

2
firmware/drivers/adc.h
View file

@ -40,6 +40,8 @@
#define BATTERY_SCALE_FACTOR 6546
#endif
#define EXT_SCALE_FACTOR 14800
unsigned short adc_read(int channel);
void adc_init(void);

15
firmware/drivers/power.c
View file

@ -22,12 +22,16 @@
#include "adc.h"
#include "power.h"
#ifdef HAVE_CHARGE_CTRL
bool charger_enabled = 0;
#endif
#ifndef SIMULATOR
bool charger_inserted(void)
{
#ifdef ARCHOS_RECORDER
return adc_read(ADC_EXT_POWER) > 0x200;
return adc_read(ADC_EXT_POWER) > 0x100;
#else
return (PADR & 1) == 0;
#endif
@ -58,11 +62,14 @@ bool battery_level_safe(void)
void charger_enable(bool on)
{
#ifdef ARCHOS_RECORDER
if(on)
#ifdef HAVE_CHARGE_CTRL
if(on) {
PBDR &= ~0x20;
else
charger_enabled = 1;
} else {
PBDR |= 0x20;
charger_enabled = 0;
}
#else
on = on;
#endif

4
firmware/drivers/power.h
View file

@ -26,6 +26,10 @@
#define BATTERY_RANGE (BATTERY_LEVEL_FULL - BATTERY_LEVEL_EMPTY)
#ifdef HAVE_CHARGE_CTRL
extern bool charger_enabled;
#endif
bool charger_inserted(void);
void charger_enable(bool on);
void ide_power_enable(bool on);

177
firmware/powermgmt.c Normal file
View file

@ -0,0 +1,177 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Heikki Hannikainen
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "sh7034.h"
#include "kernel.h"
#include "thread.h"
#include "system.h"
#include "debug.h"
#include "panic.h"
#include "adc.h"
#include "string.h"
#include "power.h"
#include "powermgmt.h"
#ifndef SIMULATOR
static char power_stack[DEFAULT_STACK_SIZE];
static char power_thread_name[] = "power";
unsigned short power_history[POWER_HISTORY_LEN];
#ifdef HAVE_CHARGE_CTRL
char power_message[POWER_MESSAGE_LEN] = "";
char charge_restart_level = CHARGE_RESTART_HI;
#endif
/*
* This power thread maintains a history of battery voltage
* and should, in the future, enable charging when it's needed
* and power is available, and disable it when the battery is full.
* Battery 'fullness' can be determined by the voltage drop, see:
*
* http://www.nimhbattery.com/nimhbattery-faq.htm questions 3 & 4
* http://www.powerpacks-uk.com/Charging%20NiMh%20Batteries.htm
* http://www.angelfire.com/electronic/hayles/charge1.html (soft start idea)
* http://www.powerstream.com/NiMH.htm (discouraging)
* http://www.panasonic.com/industrial/battery/oem/images/pdf/nimhchar.pdf
* http://www.duracell.com/oem/Pdf/others/nimh_5.pdf (discharging)
* http://www.duracell.com/oem/Pdf/others/nimh_6.pdf (charging)
*
* Charging logic which we're starting with (by Linus, Hes, Bagder):
*
* 1) max 16 hrs charge time (just in negative delta detection fails)
* 2) Stop at negative delta of 5 mins
* 3) Stop at 15 mins of zero-delta or below
* 4) minimum of 15 mins charge time before 2) is applied
* 5) after end of charging, wait for charge go down 80%
* before charging again if in 'no-use overnight charging mode'
* and down to 10% if in 'fixed-location mains-powered usage mode'
*/
static void power_thread(void)
{
int i;
int avg;
#ifdef HAVE_CHARGE_CTRL
int delta;
int charged_time = 0;
#endif
while (1)
{
DEBUGF("power_thread woke up\n");
/* make POWER_AVG measurements and calculate an average of that to
* reduce the effect of backlights/disk spinning/other variation
*/
avg = 0;
for (i = 0; i < POWER_AVG; i++) {
avg += adc_read(ADC_UNREG_POWER);
sleep(15);
}
avg = avg / POWER_AVG;
/* rotate the power history */
for (i = 0; i < POWER_HISTORY_LEN-1; i++)
power_history[i] = power_history[i+1];
/* insert new value in the end, in decivolts 8-) */
power_history[POWER_HISTORY_LEN-1] = (avg * BATTERY_SCALE_FACTOR) / 10000;
#ifdef HAVE_CHARGE_CTRL
if (charger_inserted()) {
if (charger_enabled) {
/* charger inserted and enabled */
charged_time++;
if (charged_time > CHARGE_MAX_TIME) {
DEBUGF("power: charged_time > CHARGE_MAX_TIME, enough!\n");
/* have charged too long and deltaV detection did not work! */
charger_enable(false);
snprintf(power_message, POWER_MESSAGE_LEN, "Chg tmout %d min", CHARGE_MAX_TIME);
/* Perhaps we should disable charging for several
hours from this point, just to be sure. */
} else {
if (charged_time > CHARGE_MIN_TIME) {
/* have charged continuously over the minimum charging time,
* so we monitor for deltaV going negative. Multiply things
* by 100 to get more accuracy without floating point arithmetic.
* power_history[] contains decivolts.
*/
delta = 0;
for (i = 0; i < CHARGE_END_NEGD; i++)
delta += power_history[POWER_HISTORY_LEN-1-i]*100 - power_history[POWER_HISTORY_LEN-1-i-1]*100;
delta = delta / CHARGE_END_NEGD;
if (delta < -50) { /* delta < -0.3 V */
DEBUGF("power: short-term negative delta, enough!\n");
charger_enable(false);
snprintf(power_message, POWER_MESSAGE_LEN, "end negd %d %dmin", delta, charged_time);
} else {
/* if we didn't disable the charger in the previous test, check for low positive delta */
delta = 0;
for (i = 0; i < CHARGE_END_ZEROD; i++)
delta += power_history[POWER_HISTORY_LEN-1-i]*100 - power_history[POWER_HISTORY_LEN-1-i-1]*100;
delta = delta / CHARGE_END_ZEROD;
if (delta <= 5) { /* delta of <= 0.005 V */
DEBUGF("power: long-term small positive delta, enough!\n");
charger_enable(false);
snprintf(power_message, POWER_MESSAGE_LEN, "end lowd %d %dmin", delta, charged_time);
}
}
}
}
} else {
/* charged inserted but not enabled */
/* if battery is not full, enable charging */
if (battery_level() < charge_restart_level) {
DEBUGF("power: charger inserted and battery not full, enabling\n");
charger_enable(true);
charged_time = 0;
snprintf(power_message, POWER_MESSAGE_LEN, "Chg started at %d%%", battery_level());
}
}
} else {
/* charger not inserted */
if (charger_enabled) {
/* charger not inserted but was enabled */
DEBUGF("power: charger disconnected, disabling\n");
charger_enable(false);
snprintf(power_message, POWER_MESSAGE_LEN, "Charger disc");
}
/* charger not inserted and disabled, so we're discharging */
}
#endif /* HAVE_CHARGE_CTRL*/
/* sleep for roughly a minute */
sleep(HZ*(60-POWER_AVG*15));
}
}
void power_init(void)
{
/* init history to 0 */
memset(power_history, 0x00, sizeof(power_history));
#ifdef HAVE_CHARGE_CTRL
snprintf(power_message, POWER_MESSAGE_LEN, "Powermgmt started");
#endif
create_thread(power_thread, power_stack, sizeof(power_stack), power_thread_name);
}
#endif

49
firmware/powermgmt.h Normal file
View file

@ -0,0 +1,49 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Heikki Hannikainen
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef _POWERMGMT_H_
#define _POWERMGMT_H_
#ifndef SIMULATOR
#define POWER_HISTORY_LEN 2*60 /* 2 hours of samples, one per minute */
#define POWER_AVG 3 /* how many samples to take for each measurement */
#define CHARGE_END_NEGD 6 /* stop when N minutes have passed with
* avg delta being < -0.3 V */
#define CHARGE_END_ZEROD 30 /* stop when N minutes have passed with
* avg delta being < 0.005 V */
#ifdef HAVE_CHARGE_CTRL
#define POWER_MESSAGE_LEN 32 /* power thread status message */
#define CHARGE_MAX_TIME 16*60 /* minutes: maximum charging time */
#define CHARGE_MIN_TIME 10 /* minutes: minimum charging time */
#define CHARGE_RESTART_HI 90 /* %: when to restart charging in 'charge' mode */
#define CHARGE_RESTART_LO 10 /* %: when to restart charging in 'discharge' mode */
extern char power_message[POWER_MESSAGE_LEN];
extern char charge_restart_level;
#endif /* HAVE_CHARGE_CTRL */
extern unsigned short power_history[POWER_HISTORY_LEN];
void power_init(void);
#endif
#endif