v29decoder

 

	int	n,i;
	float   tmp1, tmp0;

 

	while(MIN_AVAIL()) {
		
		IT_IN(0);
		tmp0 = inPhase(0);
		IT_IN(1);
		tmp1 = quadPhase(0);
/*
 * Calculating the integer value of the inputs
 */
		if(tmp0 < 0.00001)
			intVal0 = (int)(tmp0 - 0.5);
		else
			intVal0 = (int)(tmp0 + 0.5);
			
		if(tmp1 < 0.00001)
			intVal1 = (int)(tmp1 - 0.5);
		else
			intVal1 = (int)(tmp1 + 0.5);
/*
 * Mapping the coordinates into the decimal value of the decoded inputs
 */
		if(intVal0 == 1 && intVal1 == 1)
			n = 0;
		else if(intVal0 == 3 && intVal1 == 0)
			n = 8;
		else if(intVal0 == 0 && intVal1 == 3)
			n = 4;
		else if(intVal0 == -1 && intVal1 == 1)
			n = 12;
		else if(intVal0 == 0 && intVal1 == -3)
			n = 2;
		else if(intVal0 == 1 && intVal1 == -1)
			n = 10;
		else if(intVal0 == -1 && intVal1 == -1)
			n = 6;
		else if(intVal0 == -3 && intVal1 == 0)
			n = 14;
		else if(intVal0 == 3 && intVal1 == 3)
			n = 1;
		else if(intVal0 == 5 && intVal1 == 0)
			n = 9;
		else if(intVal0 == 0 && intVal1 == 5)
			n = 5;
		else if(intVal0 == -3 && intVal1 == 3)
			n = 13;
		else if(intVal0 == 0 && intVal1 == -5)
			n = 3;
		else if(intVal0 == 3 && intVal1 == -3)
			n = 11;
		else if(intVal0 == -3 && intVal1 == -3)
			n = 7;
		else if(intVal0 == -5 && intVal1 == 0)
			n = 15;
/*
 * Calculating the binary representation of the decimal value
 */
		for(i=0; i<4; i++){
			if(n % 2)
				bit = 1;
			else
				bit = 0;
			n = n >> 1;
  			if(IT_OUT(0) ) {
				KrnOverflow("v29decoder",0);
				return(99);
			}
			data(0) = bit;	
		}
		
	}
	return(0);

/*  Capsim (r) Text Mode Kernel (TMK) Star Library (Blocks)
    Copyright (C) 1989-2017  Silicon DSP Corporation

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    http://www.silicondsp.com
    Silicon DSP  Corporation
    Las Vegas, Nevada
*/

 

/**********************************************************************
 			 	v29decoder()
***********************************************************************
Description:
This star inputs inPhase and quadPhase of the CCITT v.29 coordinates
and decodes the input into binary data.  Input buffer(0) is the inPhase
and input buffer(1) is the quadPhase.

v29decoder


This star inputs inPhase and quadPhase of the CCITT v.29 coordinates
and decodes the input into binary data.  Input buffer(0) is the inPhase
and input buffer(1) is the quadPhase.


Programmer: A. S. Sadri
Date: Aug. 3, 1990

*/