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/*! \file battery.c
\brief Inplementation: battery functions and low battery LCD indicator handling
\author Paolo Masetti <paolo.masetti@itlug.org>
*/
/*
* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License
* at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and
* limitations under the License.
*
* The Original Code is legOS code, released October 17, 1999.
*
* The Initial Developer of the Original Code is Markus L. Noga.
* Portions created by Markus L. Noga are Copyright (C) 1999
* Markus L. Noga. All Rights Reserved.
*
* Contributor(s): Markus L. Noga <markus@noga.de>
* Paolo Masetti <paolo.masetti@itlug.org>
*/
#include <sys/irq.h>
#include <dsensor.h>
#include <dlcd.h>
#include <sys/battery.h>
///////////////////////////////////////////////////////////////////////
//
// Global Variables
//
///////////////////////////////////////////////////////////////////////
#ifdef CONF_BATTERY_INDICATOR
unsigned int battery_refresh_counter = 0; //!< counter for lcd refresh in ms
unsigned int battery_refresh_period = 2000; //!< LCD refresh period in ms
#endif
///////////////////////////////////////////////////////////////////////
//
// Functions
//
///////////////////////////////////////////////////////////////////////
//! return the approximate battery voltage (in milliVolts)
#if defined(CONF_DSENSOR)
int get_battery_mv()
{
long b = ds_scale(BATTERY) * 0xABD4L;
return (int)(b / 0x618L);
}
#endif // CONF_DSENSOR
#ifdef CONF_BATTERY_INDICATOR
// battery indicator handed by kernel task when CONF_TM
#ifndef CONF_TM
//! battery indicator handler, called from system timer interrupt
#ifdef CONF_RCX_COMPILER
void battery_refresh(void) {
#else // CONF_RCX_COMPILER
HANDLER_WRAPPER("battery_refresh","battery_refresh_core");
void battery_refresh_core(void) {
#endif // CONF_RCX_COMPILER
int bmv = get_battery_mv();
if (bmv > BATTERY_NORMAL_THRESHOLD_MV)
dlcd_hide(LCD_BATTERY_X);
else if (bmv > BATTERY_LOW_THRESHOLD_MV)
dlcd_show(LCD_BATTERY_X);
}
#endif // CONF_TM
#endif // CONF_BATTERY_INDICATOR
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