fir.asm

用汇编编程实现的DSP低通

	.mmregs
COFF_FIR_START: .sect  "coff_fir"
	.include	"lowpass.inc"

K_FIR_BFFR		.set	32
d_data_buffer	.set	8000h
	.asg	AR6,FIR_DATA_P
	.sect	"fir_prog"    
	.global	_fir
_fir:
   	
   	
   	PSHM    AR6
   	SSBX	SXM                             
    SSBX    FRCT
    ;SSBX    BRAF 
	STM		#(d_data_buffer+K_FIR_BFFR-1),FIR_DATA_P    
fir_task: 
	RPTZ	A,#K_FIR_BFFR-1
	MACD	*FIR_DATA_P-,COFF_FIR_START,A  
	STH		A,*(8000h)
	NOP
	POPM	AR6
	RET
	.end