fir.asm

CCS调试实验文件夹下共有9个文件夹

;一个FIR滤波器源程序  fir.asm
			.mmregs
			.global start
			.def  	start,_c_int00
			     				
INDEX 		.set 	1
KS			.set  	256 
               
            .copy  	"firin.inc"             ;x(n)在程序区0x00A6
		    .copy  	"firdata.inc"           ;Bn
		    .data
OUTPUT		.space	1024                   ;输出在数据区0x2400
FIR_DP		.usect	"FIR_VARS",0
D_FIN		.usect	"FIR_VARS",1
D_FOUT		.usect	"FIR_VARS",1          
COFFTAB	    .usect	"FIR_COFF",N
DATABUF		.usect	"FIR_BFR",N
BOS			.usect	"STACK",0Fh
TOS			.usect	"STACK",1 

			.text
			.asg	AR0,INDEX_P
			.asg	AR4,DATA_P
			.asg	AR5,COFF_P
			.asg 	AR6,INBUF_P
		 	.asg	AR7,OUTBUF_P 
_c_int00
		b start 
		nop
		nop
start:  
		STM 	#COFFTAB,COFF_P
		RPT 	#N-1 
		MVPD	#COFF_FIR,*COFF_P+
		STM		#INDEX,INDEX_P	
		STM		#DATABUF,DATA_P
		RPTZ	A,#N-1
		STL		A,*DATA_P+
		STM		#(DATABUF+N-1),DATA_P
		STM		#COFFTAB,COFF_P
FIR_TASK:
        STM		#INPUT,INBUF_P
        STM 	#OUTPUT,OUTBUF_P    
        STM		#KS-1,BRC
        RPTBD	LOOP-1
        STM		#N,BK
        LD		*INBUF_P+,A
FIR_FILTER:
 		STL		A,*DATA_P+%
 		RPTZ	A,N-1
 		MAC		*DATA_P+0%,*COFF_P+0%,A
 		STH		A,*OUTBUF_P+
LOOP:
EEND	B 	EEND
 		.end