/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2002 by Heikki Hannikainen, Uwe Freese * * 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 "cpu.h" #include "kernel.h" #include "thread.h" #include "system.h" #include "debug.h" #include "panic.h" #include "adc.h" #include "string.h" #include "sprintf.h" #include "ata.h" #include "power.h" #include "button.h" #include "ata.h" #include "mpeg.h" #include "mp3_playback.h" #include "usb.h" #include "powermgmt.h" #include "backlight.h" #include "lcd.h" #include "rtc.h" #ifdef CONFIG_TUNER #include "fmradio.h" #endif long last_event_tick; void reset_poweroff_timer(void) { last_event_tick = current_tick; } #ifdef SIMULATOR int battery_level(void) { return 75; } int battery_time(void) { return 500; } bool battery_level_safe(void) { return battery_level() >= 10; } void set_poweroff_timeout(int timeout) { (void)timeout; } void set_battery_capacity(int capacity) { (void)capacity; } void set_car_adapter_mode(bool setting) { (void)setting; } #else /* not SIMULATOR */ int battery_capacity = BATTERY_CAPACITY_MIN; /* only a default value */ int battery_level_cached = -1; /* battery level of this minute, updated once per minute */ static bool car_adapter_mode_enabled = false; static const int poweroff_idle_timeout_value[15] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 30, 45, 60 }; static const short percent_to_volt_decharge[BATTERY_TYPES_COUNT][11] = /* voltages (centivolt) of 0%, 10%, ... 100% when charging disabled */ { #if CONFIG_BATTERY == BATT_LIION2200 /* measured values */ { 260, 285, 295, 303, 311, 320, 330, 345, 360, 380, 400 } #elif CONFIG_BATTERY == BATT_3AAA /* measured values */ { 280, 325, 341, 353, 364, 374, 385, 395, 409, 427, 475 }, /* alkaline */ { 310, 355, 363, 369, 372, 374, 376, 378, 380, 386, 405 } /* NiMH */ #else /* NiMH */ /* original values were taken directly after charging, but it should show 100% after turning off the device for some hours, too */ { 450, 481, 491, 497, 503, 507, 512, 514, 517, 525, 540 } /* orig. values: ...,528,560 */ #endif }; void set_battery_capacity(int capacity) { battery_capacity = capacity; if (battery_capacity > BATTERY_CAPACITY_MAX) battery_capacity = BATTERY_CAPACITY_MAX; if (battery_capacity < BATTERY_CAPACITY_MIN) battery_capacity = BATTERY_CAPACITY_MIN; } #if BATTERY_TYPES_COUNT > 1 static int battery_type = 0; void set_battery_type(int type) { if (type != battery_type) { battery_type = type; battery_level_cached = -1; /* reset on type change */ } } #endif #if defined(HAVE_CHARGE_CTRL) || CONFIG_BATTERY == BATT_LIION2200 int charge_state = 0; /* at the beginning, the charger does nothing */ #endif #ifdef HAVE_CHARGE_CTRL char power_message[POWER_MESSAGE_LEN] = ""; /* message that's shown in debug menu */ char charge_restart_level = CHARGE_RESTART_HI; /* level at which charging starts */ int powermgmt_last_cycle_startstop_min = 25; /* how many minutes ago was the charging started or stopped? */ int powermgmt_last_cycle_level = 0; /* which level had the batteries at this time? */ bool trickle_charge_enabled = true; int trickle_sec = 0; /* how many seconds should the charger be enabled per minute for trickle charging? */ static const short percent_to_volt_charge[11] = /* voltages (centivolt) of 0%, 10%, ... 100% when charging enabled */ { /* values guessed, see http://www.seattlerobotics.org/encoder/200210/LiIon2.pdf until someone measures voltages over a charging cycle */ 476, 544, 551, 556, 561, 564, 566, 576, 582, 584, 585 /* NiMH */ }; void enable_trickle_charge(bool on) { trickle_charge_enabled = on; } #endif /* HAVE_CHARGE_CTRL */ static long power_stack[DEFAULT_STACK_SIZE/sizeof(long)]; static const char power_thread_name[] = "power"; static int poweroff_timeout = 0; static long last_charge_time = 0; int powermgmt_est_runningtime_min = -1; static bool sleeptimer_active = false; static unsigned long sleeptimer_endtick; unsigned short power_history[POWER_HISTORY_LEN]; int battery_time(void) { return powermgmt_est_runningtime_min; } /* look into the percent_to_volt_* table and get a realistic battery level percentage */ int voltage_to_percent(int voltage, const short* table) { if (voltage <= table[0]) return 0; else if (voltage >= table[10]) return 100; else { /* search nearest value */ int i = 0; while ((i < 10) && (table[i+1] < voltage)) i++; /* interpolate linear between the smaller and greater value */ return i * 10 /* 10th */ + (voltage - table[i]) * 10 / (table[i+1] - table[i]); /* 1th */ } } /* update battery level, called only once per minute */ void battery_level_update(void) { int level = 0; unsigned short c = 0; int i; #if BATTERY_TYPES_COUNT == 1 /* single type */ const int battery_type = 0; #endif /* calculate maximum over last 3 minutes (skip empty samples) */ for (i = 0; i < 3; i++) if (power_history[POWER_HISTORY_LEN-1-i] > c) c = power_history[POWER_HISTORY_LEN-1-i]; if (c) level = c; else /* history was empty, get a fresh sample */ level = (adc_read(ADC_UNREG_POWER) * BATTERY_SCALE_FACTOR) / 10000; if(level > BATTERY_LEVEL_FULL) level = BATTERY_LEVEL_FULL; if(level < BATTERY_LEVEL_EMPTY) level = BATTERY_LEVEL_EMPTY; #ifdef HAVE_CHARGE_CTRL if (charge_state == 0) { /* decharge */ level = voltage_to_percent(level, percent_to_volt_decharge[battery_type]); } else if (charge_state == 1) { /* charge */ level = voltage_to_percent(level, percent_to_volt_charge); } else {/* in trickle charge, the battery is per definition 100% full */ battery_level_cached = level = 100; } #else level = voltage_to_percent(level, percent_to_volt_decharge[battery_type]); /* always use the decharge table */ #endif #ifndef HAVE_MMC /* this adjustment is only needed for HD based */ if (battery_level_cached == -1) { /* first run of this procedure */ /* the battery voltage is usually a little lower directly after turning on, because the disk was used heavily raise it by 5 % */ battery_level_cached = (level > 95) ? 100 : level + 5; } else #endif { /* the level is allowed to be -1 of the last value when usb not connected and to be -3 of the last value when usb is connected */ if (usb_inserted()) { if (level < battery_level_cached - 3) level = battery_level_cached - 3; } else { if (level < battery_level_cached - 1) level = battery_level_cached - 1; } battery_level_cached = level; } } /* Returns battery level in percent */ int battery_level(void) { #ifdef HAVE_CHARGE_CTRL if ((charge_state==1) && (battery_level_cached==100)) return 99; #endif return battery_level_cached; } /* Tells if the battery level is safe for disk writes */ bool battery_level_safe(void) { /* I'm pretty sure we don't want an average over a long time here */ if (power_history[POWER_HISTORY_LEN-1]) return power_history[POWER_HISTORY_LEN-1] > BATTERY_LEVEL_DANGEROUS; else return adc_read(ADC_UNREG_POWER) > (BATTERY_LEVEL_DANGEROUS * 10000L) / BATTERY_SCALE_FACTOR; } void set_poweroff_timeout(int timeout) { poweroff_timeout = timeout; } void set_sleep_timer(int seconds) { if(seconds) { sleeptimer_active = true; sleeptimer_endtick = current_tick + seconds * HZ; } else { sleeptimer_active = false; sleeptimer_endtick = 0; } } int get_sleep_timer(void) { if(sleeptimer_active) return (sleeptimer_endtick - current_tick) / HZ; else return 0; } /* We shut off in the following cases: 1) The unit is idle, not playing music 2) The unit is playing music, but is paused We do not shut off in the following cases: 1) The USB is connected 2) The charger is connected 3) We are recording, or recording with pause */ static void handle_auto_poweroff(void) { long timeout = poweroff_idle_timeout_value[poweroff_timeout]*60*HZ; int mpeg_stat = mpeg_status(); bool charger_is_inserted = charger_inserted(); static bool charger_was_inserted = false; /* The was_inserted thing prevents the unit to shut down immediately when the charger is extracted */ if(charger_is_inserted || charger_was_inserted) { last_charge_time = current_tick; } charger_was_inserted = charger_is_inserted; if(timeout && #ifdef CONFIG_TUNER (radio_get_status() != FMRADIO_PLAYING) && #endif !usb_inserted() && (mpeg_stat == 0 || ((mpeg_stat == (MPEG_STATUS_PLAY | MPEG_STATUS_PAUSE)) && !sleeptimer_active))) { if(TIME_AFTER(current_tick, last_event_tick + timeout) && TIME_AFTER(current_tick, last_disk_activity + timeout) && TIME_AFTER(current_tick, last_charge_time + timeout)) { shutdown_hw(); } } else { /* Handle sleeptimer */ if(sleeptimer_active && !usb_inserted()) { if(TIME_AFTER(current_tick, sleeptimer_endtick)) { mpeg_stop(); if(charger_is_inserted) { DEBUGF("Sleep timer timeout. Stopping...\n"); set_sleep_timer(0); backlight_off(); /* Nighty, nighty... */ } else { DEBUGF("Sleep timer timeout. Shutting off...\n"); /* Make sure that the disk isn't spinning when we cut the power */ while(ata_disk_is_active()) sleep(HZ); shutdown_hw(); } } } } } void set_car_adapter_mode(bool setting) { car_adapter_mode_enabled = setting; } static bool charger_power_is_on; #ifdef HAVE_CHARGING static void car_adapter_mode_processing(void) { static bool waiting_to_resume_play = false; static long play_resume_time; if (car_adapter_mode_enabled) { if (waiting_to_resume_play) { if (TIME_AFTER(current_tick, play_resume_time)) { if (mpeg_status() & MPEG_STATUS_PAUSE) { mpeg_resume(); } waiting_to_resume_play = false; } } else { if (charger_power_is_on) { /* if external power was turned off */ if (!charger_inserted()) { charger_power_is_on = false; /* if playing */ if ((mpeg_status() & MPEG_STATUS_PLAY) && !(mpeg_status() & MPEG_STATUS_PAUSE)) { mpeg_pause(); } } } else { /* if external power was turned on */ if (charger_inserted()) { charger_power_is_on = true; /* if paused */ if (mpeg_status() & MPEG_STATUS_PAUSE) { /* delay resume a bit while the engine is cranking */ play_resume_time = current_tick + HZ*5; waiting_to_resume_play = true; } } } } } } #endif /* Check to see whether or not we've received an alarm in the last second */ #ifdef HAVE_ALARM_MOD static void power_thread_rtc_process(void) { if (rtc_check_alarm_flag()) { rtc_enable_alarm(false); } } #endif /* * This function is called to do the relativly long sleep waits from within the * main power_thread loop while at the same time servicing any other periodic * functions in the power thread which need to be called at a faster periodic * rate than the slow periodic rate of the main power_thread loop */ static void power_thread_sleep(int ticks) { #ifdef HAVE_CHARGING while (ticks > 0) { int small_ticks = MIN(HZ/2, ticks); sleep(small_ticks); ticks -= small_ticks; car_adapter_mode_processing(); #ifdef HAVE_ALARM_MOD power_thread_rtc_process(); #endif } #else sleep(ticks); /* no fast-processing functions, sleep the whole time */ #endif } /* * This power thread maintains a history of battery voltage * and implements a charging algorithm. * For a complete description of the charging algorithm read * docs/CHARGING_ALGORITHM. */ static void power_thread(void) { int i; int avg, ok_samples, spin_samples; int current = 0; #if CONFIG_BATTERY == BATT_LIION2200 int charging_current; #endif #ifdef HAVE_CHARGE_CTRL int delta; int charged_time = 0; int charge_max_time_now = 0; /* max. charging duration, calculated at beginning of charging */ int charge_pause = 0; /* no charging pause at the beginning */ int trickle_time = 0; /* how many minutes trickle charging already? */ #endif while (1) { /* never read power while disk is spinning, unless in USB mode */ if (ata_disk_is_active() && !usb_inserted()) { #ifdef HAVE_ALARM_MOD power_thread_rtc_process(); #endif sleep(HZ); continue; } /* Make POWER_AVG measurements and calculate an average of that to * reduce the effect of backlights/disk spinning/other variation. */ ok_samples = spin_samples = avg = 0; for (i = 0; i < POWER_AVG_N; i++) { if (ata_disk_is_active()) { if (!ok_samples) { /* if we don't have any good non-disk-spinning samples, * we take a sample anyway in case the disk is going * to spin all the time. */ avg += adc_read(ADC_UNREG_POWER); spin_samples++; } } else { if (spin_samples) /* throw away disk-spinning samples */ spin_samples = avg = 0; avg += adc_read(ADC_UNREG_POWER); ok_samples++; } power_thread_sleep(HZ*POWER_AVG_SLEEP); } avg = avg / ((ok_samples) ? ok_samples : spin_samples); /* 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 centivolts 8-) */ power_history[POWER_HISTORY_LEN-1] = (avg * BATTERY_SCALE_FACTOR) / 10000; /* update battery level every minute, ignoring first 15 minutes after start charge/decharge */ #ifdef HAVE_CHARGE_CTRL if ((powermgmt_last_cycle_startstop_min > 25) || (charge_state > 1)) #endif battery_level_update(); /* calculate estimated remaining running time */ /* decharging: remaining running time */ /* charging: remaining charging time */ #ifdef HAVE_CHARGE_CTRL if (charge_state == 1) powermgmt_est_runningtime_min = (100 - battery_level()) * battery_capacity / 100 * 60 / CURRENT_CHARGING; else { current = usb_inserted() ? CURRENT_USB : CURRENT_NORMAL; if ((backlight_get_timeout() == 1) || (charger_inserted() && backlight_get_on_when_charging())) /* LED always on or LED on when charger connected */ current += CURRENT_BACKLIGHT; powermgmt_est_runningtime_min = battery_level() * battery_capacity / 100 * 60 / current; #if MEM == 8 /* assuming 192 kbps, the running time is 22% longer with 8MB */ powermgmt_est_runningtime_min = powermgmt_est_runningtime_min * 122 / 100; #endif /* MEM == 8 */ } #else current = usb_inserted() ? CURRENT_USB : CURRENT_NORMAL; if (backlight_get_timeout() == 1) /* LED always on */ current += CURRENT_BACKLIGHT; powermgmt_est_runningtime_min = battery_level() * battery_capacity / 100 * 60 / current; #if MEM == 8 /* assuming 192 kbps, the running time is 22% longer with 8MB */ powermgmt_est_runningtime_min = powermgmt_est_runningtime_min * 122 / 100; #endif /* MEM == 8 */ #endif /* HAVE_CHARGE_CONTROL */ #if CONFIG_BATTERY == BATT_LIION2200 /* We use the information from the ADC_EXT_POWER ADC channel, which tells us the charging current from the LTC1734. When DC is connected (either via the external adapter, or via USB), we try to determine if it is actively charging or only maintaining the charge. My tests show that ADC readings is below about 0x80 means that the LTC1734 is only maintaining the charge. */ if(charger_inserted()) { charging_current = adc_read(ADC_EXT_POWER); if(charging_current < 0x80) { charge_state = 2; /* Trickle */ } else { charge_state = 1; /* Charging */ } } else { charge_state = 0; /* Not charging */ } #else #ifdef HAVE_CHARGE_CTRL if (charge_pause > 0) charge_pause--; if (charger_inserted()) { if (charge_state == 1) { /* charger inserted and enabled */ charged_time++; snprintf(power_message, POWER_MESSAGE_LEN, "Chg %dm max %dm", charged_time, charge_max_time_now); if (charged_time > charge_max_time_now) { DEBUGF("power: charged_time > charge_max_time_now, " "enough!\n"); /* have charged too long and deltaV detection did not work! */ powermgmt_last_cycle_level = battery_level(); powermgmt_last_cycle_startstop_min = 0; charger_enable(false); snprintf(power_message, POWER_MESSAGE_LEN, "Chg tmout %d min", charge_max_time_now); /* disable charging for several hours from this point, just to be sure */ charge_pause = CHARGE_PAUSE_LEN; /* no trickle charge here, because the charging cycle didn't end the right way */ charge_state = 0; /* 0: decharging/charger off, 1: charge, 2: top-off, 3: trickle */ } else { if (charged_time > CHARGE_MIN_TIME) { /* have charged continuously over the minimum charging time, so we monitor for deltaV going negative. Multiply thingsby 100 to get more accuracy without floating point arithmetic. power_history[] contains centivolts so after multiplying by 100 the deltas are in tenths of millivolts (delta of 5 is 0.0005 V). */ delta = ( power_history[POWER_HISTORY_LEN-1] * 100 + power_history[POWER_HISTORY_LEN-2] * 100 - power_history[POWER_HISTORY_LEN-1- CHARGE_END_NEGD+1] * 100 - power_history[POWER_HISTORY_LEN-1- CHARGE_END_NEGD] * 100 ) / CHARGE_END_NEGD / 2; if (delta < -100) { /* delta < -10 mV */ DEBUGF("power: short-term negative" " delta, enough!\n"); powermgmt_last_cycle_level = battery_level(); powermgmt_last_cycle_startstop_min = 0; charger_enable(false); snprintf(power_message, POWER_MESSAGE_LEN, "end negd %d %dmin", delta, charged_time); /* disable charging for several hours from this point, just to be sure */ charge_pause = CHARGE_PAUSE_LEN; /* enable trickle charging */ if (trickle_charge_enabled) { trickle_sec = CURRENT_NORMAL * 60 / CURRENT_CHARGING; /* first guess, maybe consider if LED backlight is on, disk is active,... */ trickle_time = 0; charge_state = 2; /* 0: decharging/charger off, 1: charge, 2: top-off, 3: trickle */ } else { charge_state = 0; /* 0: decharging/charger off, 1: charge, 2: top-off, 3: trickle */ } } else { /* if we didn't disable the charger in the previous test, check for low positive delta */ delta = ( power_history[POWER_HISTORY_LEN-1] * 100 + power_history[POWER_HISTORY_LEN-2] * 100 - power_history[POWER_HISTORY_LEN-1- CHARGE_END_ZEROD+1] * 100 - power_history[POWER_HISTORY_LEN-1- CHARGE_END_ZEROD] * 100 ) / CHARGE_END_ZEROD / 2; if (delta < 1) { /* delta < 0.1 mV */ DEBUGF("power: long-term small " "positive delta, enough!\n"); powermgmt_last_cycle_level = battery_level(); powermgmt_last_cycle_startstop_min = 0; charger_enable(false); snprintf(power_message, POWER_MESSAGE_LEN, "end lowd %d %dmin", delta, charged_time); /* disable charging for several hours from this point, just to be sure */ charge_pause = CHARGE_PAUSE_LEN; /* enable trickle charging */ if (trickle_charge_enabled) { trickle_sec = CURRENT_NORMAL * 60 / CURRENT_CHARGING; /* first guess, maybe consider if LED backlight is on, disk is active,... */ trickle_time = 0; charge_state = 2; /* 0: decharging/charger off, 1: charge, 2: top-off, 3: trickle */ } else { charge_state = 0; /* 0: decharging/charger off, 1: charge, 2: top-off, 3: trickle */ } } } } } } else if (charge_state > 1) { /* top off or trickle? */ /* adjust trickle charge time */ if ( ((charge_state == 2) && (power_history[POWER_HISTORY_LEN-1] > TOPOFF_VOLTAGE)) || ((charge_state == 3) && (power_history[POWER_HISTORY_LEN-1] > TRICKLE_VOLTAGE)) ) { /* charging too much */ trickle_sec--; } else { /* charging too less */ trickle_sec++; } if (trickle_sec > 24) trickle_sec = 24; if (trickle_sec < 1) trickle_sec = 1; /* charge the calculated amount of seconds */ charger_enable(true); power_thread_sleep(HZ * trickle_sec); charger_enable(false); /* trickle charging long enough? */ if (trickle_time++ > TRICKLE_MAX_TIME + TOPOFF_MAX_TIME) { trickle_sec = 0; /* show in debug menu that trickle is off */ charge_state = 0; /* 0: decharging/charger off, 1: charge, 2: top-off, 3: trickle */ powermgmt_last_cycle_startstop_min = 0; } if ((charge_state == 2) && (trickle_time > TOPOFF_MAX_TIME)) /* change state? */ charge_state = 3; /* 0: decharging/charger off, 1: charge, 2: top-off, 3: trickle */ } else { /* charge_state == 0 */ /* the charger is enabled here only in one case: if it was turned on at boot time (power_init) */ /* turn it off now */ if (charger_enabled) charger_enable(false); } /* Start new charge cycle? This must be possible also in trickle/top-off, because when usb connected, */ /* the trickle charge amount may not be enough */ if ((charge_state == 0) || (charge_state > 1)) /* if battery is not full, enable charging */ /* make sure charging starts if 1%-lazyness in battery_level_update() is too slow */ if ( (battery_level() < charge_restart_level) || (power_history[POWER_HISTORY_LEN-1] < BATTERY_LEVEL_DANGEROUS)) { if (charge_pause) { DEBUGF("power: batt level < restart level," " but charge pause, not enabling\n"); snprintf(power_message, POWER_MESSAGE_LEN, "chg pause %d min", charge_pause); } else { /* calculate max charge time depending on current battery level */ /* take 35% more because some more energy is used for heating up the battery */ i = CHARGE_MAX_TIME_1500 * battery_capacity / 1500; charge_max_time_now = i * (100 + 35 - battery_level()) / 100; if (charge_max_time_now > i) { charge_max_time_now = i; } snprintf(power_message, POWER_MESSAGE_LEN, "ChgAt %d%% max %dm", battery_level(), charge_max_time_now); /* enable the charger after the max time calc is done, because battery_level depends on if the charger is on */ DEBUGF("power: charger inserted and battery" " not full, enabling\n"); powermgmt_last_cycle_level = battery_level(); powermgmt_last_cycle_startstop_min = 0; charged_time = 0; charger_enable(true); charge_state = 1; /* 0: decharging/charger off, 1: charge, 2: top-off, 3: trickle */ /* clear the power history so that we don't use values before discharge for the long-term delta */ for (i = 0; i < POWER_HISTORY_LEN-1; i++) power_history[i] = power_history[POWER_HISTORY_LEN-1]; } } } else { /* charger not inserted */ if (charge_state > 0) { /* charger not inserted but was enabled */ DEBUGF("power: charger disconnected, disabling\n"); powermgmt_last_cycle_level = battery_level(); powermgmt_last_cycle_startstop_min = 0; /* show in debug menu that trickle is off */ trickle_sec = 0; charger_enable(false); charge_state = 0; /* 0: decharging/charger off, 1: charge, 2: top-off, 3: trickle */ snprintf(power_message, POWER_MESSAGE_LEN, "Charger disc"); } /* charger not inserted and disabled, so we're discharging */ } powermgmt_last_cycle_startstop_min++; #endif /* HAVE_CHARGE_CTRL*/ #endif /* # if CONFIG_BATTERY == BATT_LIION2200 */ /* sleep for roughly a minute */ #ifdef HAVE_CHARGE_CTRL i = 60 - trickle_sec - POWER_AVG_N * POWER_AVG_SLEEP; #else i = 60 - POWER_AVG_N * POWER_AVG_SLEEP; #endif if (i > 0) power_thread_sleep(HZ*(i)); handle_auto_poweroff(); } } void powermgmt_init(void) { power_init(); /* init history to 0 */ memset(power_history, 0x00, sizeof(power_history)); #if 0 /* initialize the history with a single sample to prevent level flickering during the first minute of execution */ power_history[POWER_HISTORY_LEN-1] = (adc_read(ADC_UNREG_POWER) * BATTERY_SCALE_FACTOR) / 10000; /* calculate the first battery level */ battery_level_update(); /* calculate the remaining time to that the info screen displays something useful */ powermgmt_est_runningtime_min = battery_level() * battery_capacity / 100 * 60 / CURRENT_NORMAL; #if MEM == 8 /* assuming 192 kbps, the running time is 22% longer with 8MB */ powermgmt_est_runningtime_min = powermgmt_est_runningtime_min * 122 / 100; #endif #ifdef HAVE_CHARGE_CTRL snprintf(power_message, POWER_MESSAGE_LEN, "Powermgmt started"); /* if the battery is nearly empty, start charging immediately */ if (power_history[POWER_HISTORY_LEN-1] < BATTERY_LEVEL_DANGEROUS) charger_enable(true); #endif #endif charger_power_is_on = charger_inserted(); create_thread(power_thread, power_stack, sizeof(power_stack), power_thread_name); } #endif /* SIMULATOR */ /* Various hardware housekeeping tasks relating to shutting down the jukebox */ void shutdown_hw(void) { #ifndef SIMULATOR mpeg_stop(); ata_flush(); ata_spindown(1); while(ata_disk_is_active()) sleep(HZ/10); mp3_shutdown(); #if CONFIG_KEYPAD == ONDIO_PAD backlight_off(); sleep(1); lcd_set_contrast(0); #endif power_off(); #endif }