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129 lines
3.4 KiB
C
129 lines
3.4 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2009 by Maurus Cuelenaere
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "system.h"
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#include "jz4740.h"
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#include "powermgmt.h"
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#include "kernel.h"
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#include "logf.h"
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#include "adc.h"
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#define SADC_CFG_INIT ( \
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(2 << SADC_CFG_CLKOUT_NUM_BIT) | \
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(1 << SADC_CFG_CLKDIV_BIT) | \
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SADC_CFG_PBAT_HIGH | \
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SADC_CFG_CMD_INT_PEN \
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)
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static volatile unsigned short bat_val;
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static struct mutex battery_mtx;
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const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
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{
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/* TODO */
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1000
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};
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const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
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{
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/* TODO */
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900
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};
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/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
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const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
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{
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/* TODO */
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{ 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000 },
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};
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/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
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const unsigned short percent_to_volt_charge[11] =
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{
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/* TODO */
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1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000
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};
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/* VBAT = (BDATA/4096) * 7.5V */
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#define BATTERY_SCALE_FACTOR 1875
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/* Returns battery voltage from ADC [millivolts] */
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int _battery_voltage(void)
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{
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unsigned int dummy, timeout=HZ/4;
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mutex_lock(&battery_mtx);
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dummy = REG_SADC_BATDAT;
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dummy = REG_SADC_BATDAT;
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(void)dummy;
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REG_SADC_ENA |= SADC_ENA_PBATEN;
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bat_val = 0;
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/* primitive wakeup event */
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while(bat_val == 0 && timeout--)
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sleep(0);
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logf("%d %d", bat_val, (bat_val*BATTERY_SCALE_FACTOR)>>10);
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mutex_unlock(&battery_mtx);
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return (bat_val*BATTERY_SCALE_FACTOR)>>10;
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}
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void adc_init(void)
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{
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__cpm_start_sadc();
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REG_SADC_ENA = 0;
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REG_SADC_STATE &= ~REG_SADC_STATE;
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REG_SADC_CTRL = 0x1F;
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REG_SADC_CFG = SADC_CFG_INIT;
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system_enable_irq(IRQ_SADC);
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REG_SADC_SAMETIME = 10;
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REG_SADC_WAITTIME = 100;
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REG_SADC_STATE &= ~REG_SADC_STATE;
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REG_SADC_CTRL = ~SADC_CTRL_PBATRDYM;
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REG_SADC_ENA = 0;
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mutex_init(&battery_mtx);
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}
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/* Interrupt handler */
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void SADC(void)
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{
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unsigned char state;
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unsigned char sadcstate;
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sadcstate = REG_SADC_STATE;
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state = REG_SADC_STATE & (~REG_SADC_CTRL);
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REG_SADC_STATE &= sadcstate;
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if(state & SADC_CTRL_PBATRDYM)
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{
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bat_val = REG_SADC_BATDAT;
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/* Battery AD IRQ */
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}
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}
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