PIC单片机FIR滤波代码求解释

只看该作者 · 2012-9-13 09:22

本帖最后由 rxy429 于 2012-9-13 11:06 编辑

.equ FIR_LPNumTaps, 13

; ..............................................................................
; Allocate and initialize filter taps

.section .xdata
.align 32

FIR_LPTaps:
.hword  0x0435, 0x0698, 0x08EC, 0x0AFE, 0x0C9E, 0x0DA9, 0x0E04, 0x0DA9, 0x0C9E
.hword  0x0AFE, 0x08EC, 0x0698, 0x0435

; ..............................................................................
; Allocate delay line in (uninitialized) Y data space

.section .ybss,  "b"
.align 32

FIR_LPDelay:
.space FIR_LPNumTaps*2

; ..............................................................................
; Allocate and intialize filter structure

.section .data
.global _FIR_LPFilter

_FIR_LPFilter:
.hword FIR_LPNumTaps
.hword FIR_LPTaps
.hword FIR_LPTaps+FIR_LPNumTaps*2-1
.hword 0xff00
.hword FIR_LPDelay
.hword FIR_LPDelay+FIR_LPNumTaps*2-1
.hword FIR_LPDelay

有谁能帮忙解释这段代码
求高手指教
前面部分是 13个是FIR滤波系数
后面部分不理解求高手帮忙
FIR_LPDelay:
.space FIR_LPNumTaps*2

; ..............................................................................
; Allocate and intialize filter structure

.section .data
.global _FIR_LPFilter

_FIR_LPFilter:
.hword FIR_LPNumTaps
.hword FIR_LPTaps
.hword FIR_LPTaps+FIR_LPNumTaps*2-1
.hword 0xff00
.hword FIR_LPDelay
.hword FIR_LPDelay+FIR_LPNumTaps*2-1
.hword FIR_LPDelay

到这部分就不理解了。。

只看该作者 · 2012-9-13 11:11

1# rxy429
问题没解决。。。求高手帮忙啊。。。。