InitCarrier_main.c

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/********************************************************************************/
/* Use a raspberry pi with a IR led as remote control for your Tv, Dvd etc.     */
/* Copyright (C) 2016  Ed Kapitein                                              */
/*                                                                              */
/* 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.                                          */
/*                                                                              */
/* 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, see <http://www.gnu.org/licenses/>.        */
/********************************************************************************/
#include "../Common/Common.h"
#include "../Blast/Blast.h"
#include "../Kmod/Kmod.h"
#include <stdio.h>
#include <stdlib.h>

int main (int argc, char *argv[])
 {
 int            DutyCycle;
 int            Divisor=4096;
 int            Range=1024;
 int            x;
 int            y;
 float          HwClock=HwClockFreq;
 float          Delta;
 float          BestMatch;
 float          SollFreq;
 float          IstFreq;

 if( argc != 3 )
  {
  fprintf( stderr, "201608202109 Please provide me with 2 parameters:\n" );
  fprintf( stderr, "201608202109 Freq and DutyCycle -eq 56 30\n" );
  return(-1);
  }
  
 if( atoi(argv[1]) < 10 || atoi(argv[1]) > 90 )
  {
  fprintf( stderr, "201608202110 The frequency should be between 10 and 90.\n" );
  fprintf( stderr, "201608202110 Change this file if that is not true\n" );
  return(-1);
  }
 
 if( atoi(argv[2]) < 10 || atoi(argv[2]) > 90 )
  {
  fprintf( stderr, "201608202110 The DutyCycle should be between 10 and 90.\n" );
  fprintf( stderr, "201608202110 Change this file if that is not true\n" );
  return(-1);
  }

 SollFreq=atoi(argv[1]);
 DutyCycle=atoi(argv[2]);

 BestMatch= 256 * HwClock;              /* to make sure the first Match is better than this one               */ 
 for(x=10; x < 4095; x++)               /* Divisor, not starting at 0 to stay clear of the min and max values  */
  {
  y=1024;
  IstFreq = 256 * HwClock / x / y;      /* TODO since y is fixed, x can be calculated, no need for the for loop */
  Delta=SollFreq - IstFreq;

  if( Delta < 0)                       /* abs for a uint32_t */
   {
   Delta=Delta * -1;
   }

  if( Delta < BestMatch )              /* Save the values if the resulting frequency is closer to the desired */
   {
   Divisor=x;
   Range=y;
   BestMatch=Delta;
   }
  }

 InitCarrier( Range, Divisor, DutyCycle );

 return(0);
 }