mirror of
https://github.com/RIOT-OS/RIOT.git
synced 2024-12-29 04:50:03 +01:00
121 lines
3.5 KiB
C
121 lines
3.5 KiB
C
/******************************************************************************
|
|
Copyright 2008-2009, Freie Universitaet Berlin (FUB). All rights reserved.
|
|
|
|
These sources were developed at the Freie Universitaet Berlin, Computer Systems
|
|
and Telematics group (http://cst.mi.fu-berlin.de).
|
|
-------------------------------------------------------------------------------
|
|
This file is part of FeuerWare.
|
|
|
|
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 3 of the License, or (at your option) any later
|
|
version.
|
|
|
|
FeuerWare is distributed in the hope that it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License along with
|
|
this program. If not, see http://www.gnu.org/licenses/ .
|
|
--------------------------------------------------------------------------------
|
|
For further information and questions please use the web site
|
|
http://scatterweb.mi.fu-berlin.de
|
|
and the mailinglist (subscription via web site)
|
|
scatterweb@lists.spline.inf.fu-berlin.de
|
|
*******************************************************************************/
|
|
|
|
/**
|
|
* @ingroup ltc4150
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* @brief LTC4150 Coulomb Counter
|
|
*
|
|
* @author Freie Universität Berlin, Computer Systems & Telematics, FeuerWhere project
|
|
* @author Heiko Will
|
|
* @author Kaspar Schleiser <kaspar.schleiser@fu-berlin.de>
|
|
*/
|
|
|
|
#include <hwtimer.h>
|
|
#include "ltc4150_arch.h"
|
|
|
|
static volatile unsigned long int_count;
|
|
static unsigned int last_int_time;
|
|
static unsigned int last_int_duration;
|
|
static unsigned int start_time;
|
|
|
|
static double __attribute__((__no_instrument_function__)) int_to_coulomb(int ints) {
|
|
return ((double)ints) / (_GFH * _R_SENSE);
|
|
}
|
|
|
|
static double __attribute__((__no_instrument_function__)) coulomb_to_mA(double coulomb){
|
|
return (coulomb * 1000) / 3600;
|
|
}
|
|
|
|
static double mAh_to_Joule(double mAh) {
|
|
return (SUPPLY_VOLTAGE * mAh * 3600);
|
|
}
|
|
|
|
uint32_t ltc4150_get_last_int_duration_us(void) {
|
|
return HWTIMER_TICKS_TO_US(last_int_duration);
|
|
}
|
|
|
|
double ltc4150_get_current_mA(void) {
|
|
return 1000000000/(ltc4150_get_last_int_duration_us()*(_GFH * _R_SENSE));
|
|
}
|
|
|
|
double __attribute__((__no_instrument_function__)) ltc4150_get_total_mAh(void) {
|
|
return coulomb_to_mA(int_to_coulomb(int_count));
|
|
}
|
|
|
|
double ltc4150_get_total_Joule(void) {
|
|
return mAh_to_Joule(ltc4150_get_total_mAh());
|
|
}
|
|
|
|
double ltc4150_get_avg_mA(void) {
|
|
return (int_to_coulomb(int_count)*1000000000)/HWTIMER_TICKS_TO_US(last_int_time - start_time);
|
|
}
|
|
|
|
int ltc4150_get_interval(void) {
|
|
return HWTIMER_TICKS_TO_US(last_int_time - start_time);
|
|
}
|
|
|
|
unsigned long __attribute__((__no_instrument_function__)) ltc4150_get_intcount(void) {
|
|
return int_count;
|
|
}
|
|
|
|
void ltc4150_init(void) {
|
|
ltc4150_arch_init();
|
|
}
|
|
|
|
void ltc4150_start(void) {
|
|
ltc4150_disable_int();
|
|
int_count = 0;
|
|
uint32_t now = hwtimer_now();
|
|
ltc4150_sync_blocking();
|
|
start_time = now;
|
|
last_int_time = now;
|
|
ltc4150_enable_int();
|
|
}
|
|
|
|
void ltc4150_stop(void) {
|
|
ltc4150_disable_int();
|
|
}
|
|
|
|
void __attribute__((__no_instrument_function__)) ltc4150_interrupt(void)
|
|
{
|
|
uint32_t now = hwtimer_now();
|
|
if (now >= last_int_time) {
|
|
last_int_duration = now - last_int_time;
|
|
} else {
|
|
last_int_duration = (0-1) - last_int_time + now + 1;
|
|
}
|
|
|
|
last_int_time = now;
|
|
int_count++;
|
|
}
|
|
|
|
/** @} */
|