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/*#######################################################################################
Decodieren eines RC Summen Signals
#######################################################################################*/

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// + Copyright (c) 04.2007 Holger Buss
// + only for non-profit use
// + www.MikroKopter.com
// + see the File "License.txt" for further Informations
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

#include "rc.h"
#include "main.h"

volatile int PPM_in[15];
volatile int PPM_diff[15];  // das diffenzierte Stick-Signal
volatile unsigned char NewPpmData = 1;

//############################################################################
//zum decodieren des PPM-Signals wird Timer1 mit seiner Input
//Capture Funktion benutzt:
void rc_sum_init (void)
//############################################################################
{
        TCCR1B=(1<<CS11)|(1<<CS10)|(1<<ICES1)|(1<<ICNC1);//|(1 << WGM12); //timer1 prescale 64


// PWM
//TCCR1A = (1 << COM1B1) | (1 << WGM11) | (1 << WGM10);
//TCCR1B |= (1 << WGM12);
//OCR1B = 55;
   
    TIMSK1 |= _BV(ICIE1);
    AdNeutralGier = 0;
    AdNeutralRoll = 0;
    AdNeutralNick = 0;
    return;
}

//############################################################################
//Diese Routine startet und inizialisiert den Timer für RC
SIGNAL(SIG_INPUT_CAPTURE1)
//############################################################################

{
        static unsigned int AltICR=0;
    signed int signal = 0;
        static int index;              
               
        signal = (unsigned int) ICR1 - AltICR;         
        AltICR = ICR1; 
       
    //Syncronisationspause?
        if ((signal > 1000) && (signal < 5000))  
        {
        index = 1;             
        NewPpmData = 0;  // Null bedeutet: Neue Daten
//        OCR2A = Poti2/2 + 80;
       
        }
        else
        {
        if(index < 14)
            {
            if((signal > 250) && (signal < 687))
            {
                signal -= 466; // Stabiles Signal
               
                if(abs(signal - PPM_in[index]) < 6)
                                {
                                        if(SenderOkay < 200) SenderOkay += 10;
                                }
                signal = (3 * (PPM_in[index]) + signal) / 4;  
                //373 entspricht ca. 1.5ms also Mittelstellung
                PPM_diff[index] = signal - PPM_in[index];
                PPM_in[index] = signal;
            }
            index++;  
        }
        }
}