fir_blk_test.asm

开发环境为visual dsp++3.0的FIR程序模块

/**************************************************************

File Name:	fir_blk_test.asm
		
Date Modified:	1/5/99	RFG
				7/11/00 PPG

Purpose:	Program to call fir_blk.asm

**************************************************************/

#include    "def21160.h"

#define     TAPS    64		/* length of filter */
#define     N       128		/* number of samples */

.extern	fir;

/* DM data */
.section/dm seg_dmda;
.ALIGN 2;
.var    dline[TAPS+1];			/* delay line compensate for circ buffer, see comments in block_fir.asm */
.ALIGN 2;
.var    input[N] = "input.dat";	/* array of samples */


/* PM data */
.section/dm seg_pmda;
.ALIGN 2;
.var    coeffs[TAPS] = "fircoeffs.dat";

.ALIGN 2;
.var    output[N+2];				    /* Output array.  The first and last entries are dummy */
									    /* entries to allow an optimization in the fir.*/


/* PM interrupt vector code */
.section/pm   seg_rth;
Reserved_1:     rti; nop; nop; nop;
Chip_Reset:     idle; jump start; nop; nop;


/* program memory code */
.section/pm seg_pmco;

/* Initialization code */
start:
      b0 = dline;
      l0 = @dline-1;
	  
	  b1 = input;
	  l1 = 0;

	  b8 = coeffs;
	  l8 = @coeffs;
	  
	  b9 = output;
	  l9 = 0;

	  m0=0;
	  m1=1;
	  m2=-1;
	  m3=2;
	  
	  m9=2;
	  m10=1;
	  
	  s0=0;
	  r1=TAPS/2;
	  
	  call fir (db);
	  r2=N;
	  r3=(TAPS-6)/2;

/* Terminate and wait */
wait1:   jump wait1;