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