dsp6713_algorithm.c

于博士cadence视频配套工程文件

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/* Copyright declaration                                            */
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/* Description:   	  
 *  FileName  :    	DSP6713_algorithm.c                               	
 *  Writen by :    	Yu zheng										*/                                     		 
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#define CHIP_6713

#include <csl.h>
#include <csl_edma.h>
#include "DSP6713_const.h"
#include "DSP6713_algorithm.h"

extern int inputbuffer_ping[];
extern int inputbuffer_pong[];
extern int outputbuffer_ping[];
extern int outputbuffer_pong[];

// declare and initalize a IO buffer	   
float filt_coef[FILT_TAP]={
1.353780e-002,
8.324742e-004,
-1.314537e-002,
6.845718e-003,
1.349053e-002,
-1.229753e-002,
-1.678734e-002,
2.568337e-002,
1.267590e-002,
-4.063949e-002,
-4.577620e-003,
6.626522e-002,
-2.070024e-002,
-1.149802e-001,
1.099433e-001,
4.837131e-001,
4.837131e-001,
1.099433e-001,
-1.149802e-001,
-2.070024e-002,
6.626522e-002,
-4.577620e-003,
-4.063949e-002,
1.267590e-002,
2.568337e-002,
-1.678734e-002,
-1.229753e-002,
1.349053e-002,
6.845718e-003,
-1.314537e-002,
8.324742e-004,
1.353780e-002
};
	
float filt_Lconvbuf[FILT_CONVBUFSIZE]; 
float filt_Rconvbuf[FILT_CONVBUFSIZE];	 			

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/* complex filter and cic */
void dataprocessing(Uint16 WhichBuffer)
{
    int fi;
    int fj;

	int mod = FILT_CONVBUFSIZE;
	int k = 0;
	
	float Lval;
	float Rval;	


	if (WhichBuffer == PING)
	{
		 
		for (fi=0; fi<FILT_OUTLEN; fi++)
		{
			Lval = 0;
			Rval = 0;
			
			filt_Lconvbuf[fi] = (float)inputbuffer_ping[2*fi];
			filt_Rconvbuf[fi] = (float)inputbuffer_ping[2*fi + 1];				
			
			for (fj=0; fj<FILT_TAP; fj++)
			{
				k = (fi+mod-fj) % (mod);
				Lval += filt_Lconvbuf[k] * filt_coef[fj];
				Rval += filt_Rconvbuf[k] * filt_coef[fj];			
			}			

			outputbuffer_ping[2*fi] = (int)Lval;
			outputbuffer_ping[2*fi + 1] = (int)Rval;				
		}
	}
				
	else 
	{
		 
		for (fi=0; fi<FILT_OUTLEN; fi++)
		{
			Lval = 0;
			Rval = 0;
			
			filt_Lconvbuf[fi] = (float)inputbuffer_pong[2*fi];
			filt_Rconvbuf[fi] = (float)inputbuffer_pong[2*fi + 1];			
			
			
			for (fj=0; fj<FILT_TAP; fj++)
			{
				k = (fi+mod-fj) % (mod);
				Lval += filt_Lconvbuf[k] * filt_coef[fj];
				Rval += filt_Rconvbuf[k] * filt_coef[fj];			
			}
				
			outputbuffer_pong[2*fi]      =  (int)Lval;
			outputbuffer_pong[2*fi + 1]  =  (int)Rval;				
		}
	}
	
	
	
/*	
	int fi;
	if (WhichBuffer == PING)
	{
		 
		for (fi=0; fi<DATA_LEN; fi++)
		{
			outputbuffer_ping[fi] = inputbuffer_ping[fi];		
		}
		
	}
				
	else 
	{		
		 
		for (fi=0; fi<DATA_LEN; fi++)
		{
			outputbuffer_pong[fi] = inputbuffer_pong[fi];			
		
		}		
	}
*/
	
}// end of dataprocessing

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void dummyf(){return;}

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void initconvbuf()
{
	int fi;
	for (fi=0; fi<FILT_CONVBUFSIZE; fi++)
	{
		filt_Lconvbuf[fi] = 0;
		filt_Rconvbuf[fi] = 0;
	}	
}
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void initbuf()
{
	int fi;
	for (fi=0; fi<DATA_LEN; fi++)
	{
		inputbuffer_ping[fi] = 0;
		inputbuffer_pong[fi] = 0;
		outputbuffer_ping[fi] = 0;
		outputbuffer_pong[fi] = 0;
	}	
}

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