fir.asm

几个TMS320C54xx的程序

		.MMREGS
		.GLOBAL	BEGIN
K_FIR_INDEX	.SET	1
K_FIR_BFFR	.SET	37
K_FRAME_SIZE	.SET	256
		.DATA
OUTPUT		.SPACE	K_FRAME_SIZE*16
INPUT		.COPY	firinput.dat
COFF_FIR_START	.SECT	"COFF_FIR
		.WORD	-32
		.WORD	-117
		.WORD	0
		.WORD	212
		.WORD	104
		.WORD	-288
		.WORD	-304
		.WORD	294
		.WORD	602
		.WORD	-154
		.WORD	-973
		.WORD	-232
		.WORD	1366
		.WORD	1035
		.WORD	-1717
		.WORD	-2778
		.WORD	1959
		.WORD	10184
		.WORD	14336
		.WORD	10184
		.WORD	1959
		.WORD	-2778
		.WORD	-1717
		.WORD	1035
		.WORD	1366
		.WORD	-232
		.WORD	-973
		.WORD	-154
		.WORD	602
		.WORD	294
		.WORD	-304
		.WORD	-288
		.WORD	104
		.WORD	212
		.WORD	0
		.WORD	-117
		.WORD	-32
COFF_FIR_END
FIR_DP		.USECT"FIR_VARS".0
D_FILIN		.USECT"FIR_VARS".1
D_FILOUT	.USECT"FIR_VARS".1
FIR_COFF_TABLE	.USECT"FIR_COFF".20
D_DATA_BUFFER	.USECT"FIR_BFR".40
BOS		.USECT"STACK".0FH
TOS		.USECT"STACK".1
		.TEXT
		.DEF	_MAIN
		.DEF	FIR_TASK
		.INCLUDE	"init_c54.asm"
		.ASG	AR0,FIR_INDEX_P
		.ASG	AR4,FIR_DATA_P
		.ASG	AR5,FIR_COFF_P

_MAIN:		STM 	#FIR_COFF_TABLE,FIR_COFF_P
		RPT 	#K_FIR_BFFR-1
		MVPD	#COFF_STATRT,*FIR_COFF_P+
		STM	#K_FIR_INDEX_P
		STM	#D_DATA_BUFFER,FIR_DATA_P
		RPTZ	A,#K_FIR_BFFR
		STL	A,*FIR_DATA_P+
		STM	#(D_DATA_BUFFER+K_FIR_BFFR-1),FIR_DATA_P
		STM	#FIR_COFF_TABLE,FIR_COFF_P
		
		.ASG	AR6,INBUF_P
		.ASG	AR7,OUTBUF_P
		.ASG	AR4,FIR_DATA_P
		.ASG	AR5,FIR_COFF_P

FIR_TASK:	STM	#INPUT,INBUF_P
		STM	#OUTPUT,OUTBUF_P
		STM	#K_FRAME_SIZE-1,BRC
		RPTBD	FIR_FILTER_LOOP-1
		STM	#K_FIR_BFFR,BK
		LD	*INBUF_P+,A
FIR_FILTER:	STL	A,*FIR_DATA_P+%
		RPTZ	A,(K_FIR_BFFR-1)
		MAC	*FIR_DATA_P+0%,FIR_COFF_P+0%,A
		STH	A,*OUTBUF_P+
FIR_FILTER_LOOP:
EEND:		B	EEND
		.END