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/*****************************************************************************
* Copyright (C) 2008 Thomas Kaiser, thomas@ft-fanpage.de *
* Copyright (C) 2009 Peter "woggle" Mack, mac@denich.net *
* based on the key handling by Peter Dannegger *
* see www.mikrocontroller.net *
* Copyright (C) 2011 Christian "Cebra" Brandtner, brandtner@brandtner.net *
* Copyright (C) 2011 Harald Bongartz *
* *
* 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 2 of the License. *
* *
* This program 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, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
* *
* Credits to: *
* Holger Buss & Ingo Busker from mikrokopter.de for the MK project + SVN *
* http://www.mikrokopter.de *
* Gregor "killagreg" Stobrawa for his version of the MK code *
* Thomas Kaiser "thkais" for the original project. See *
* http://www.ft-fanpage.de/mikrokopter/ *
* http://forum.mikrokopter.de/topic-4061-1.html *
* Claas Anders "CaScAdE" Rathje for providing the font and his C-OSD code *
* http://www.mylifesucks.de/oss/c-osd/ *
* Harald Bongartz "HaraldB" for providing his Ideas and Code for usibility*
*****************************************************************************/
#include "cpu.h"
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include <inttypes.h>
#include <stdlib.h>
#include <avr/pgmspace.h>
#include "lcd.h"
#include "lipo.h"
#include "eeprom.h"
// Global variables
double accumulator = 0; //!< Accumulated 10-bit samples
double Vin = 0; //!< 16-bit float number result
short temp = 0; //!< Temporary variable
short samples = 0; //!< Number of conversions
uint16_t volt_avg = 0;
//! ADC interrupt routine
ISR (ADC_vect)
{
accumulator += ADCW;
samples++;
if(samples>4095)
{
oversampled();
}
}
//--------------------------------------------------------------
//
void ADC_Init (void)
{
ADMUX = (0<<REFS1) | (1<<REFS0); // externe 5V Referenzspannung nutzen
ADMUX = (ADMUX & ~(0x1F)) | (1 & 0x1F); // ADC1 verwenden
ADCSRA = (1<<ADEN)|(1<<ADIE)|(1<<ADSC)|(1<<ADATE)|(1<<ADPS2)|(1<<ADPS1)|(1<<ADPS0); // Prescaler 128, Freilaufend, Interrupte frei
}
/*! Error compensation, Scaling 16-bit result, Rounding up
, Calculate 16-bit result, Resets variables
Quelle AVR121: Enhancing ADC resolution by versampling
*/
void oversampled(void)
{
cli();
accumulator += Lipo_UOffset; //5150 Offset error compensation
// accumulator *= 0.9993; // Gain error compensation
accumulator *= 0.9600; //0.9800 Gain error compensation
temp=(int)accumulator%64;
accumulator/=64; // Scaling the answer
if(temp>=32)
{
accumulator += 1; // Round up
}
// Vin = (accumulator/65536)*4.910; // Calculating 16-bit result
Vin =accumulator/7.5;
volt_avg = Vin;
// write_ndigit_number_u(0, 3, Vin, 5, 0);
// write_ndigit_number_u(0, 4, volt_avg, 5, 0);
samples = 0;
accumulator = 0;
sei();
}
void show_Lipo(void)
{
uint16_t Balken = 0;
lcd_rect(103,2,1,3,1);
if (volt_avg < 320)
{
Balken = 0;
lcd_frect(106 + Balken-1, 2, 19-Balken, 3, 0); // löschen
}
if (PKT_Accutyp == true) //LiPO Akku
{
lcd_rect(104, 0, 23, 7, 1); // Rahmen
if (volt_avg >= 420) Balken = 19;
if ((volt_avg > 320) && (volt_avg < 420)) Balken = (volt_avg-320)/5;
lcd_frect(106 + Balken+1, 2, 19-Balken, 3, 0); // löschen
}
if (PKT_Accutyp == false) // LiON Akku
{
lcd_rect(104, 0, 22, 7, 1); // Rahmen
if (volt_avg >= 410) Balken = 18;
if ((volt_avg > 320) && (volt_avg < 410)) Balken = ((volt_avg-320)/5);
lcd_frect(106 + Balken+1, 2, 18-Balken, 3, 0); // löschen
}
if (Balken > 0) lcd_frect(106, 2, Balken, 3, 1); // Füllung
}