FIR低通滤波汇编程序求注释

只看该作者 · 2013-5-26 10:56

HIGHPASS .set 0          ;if you want to use ,please set the value to 1
BANDPASS .set 0
LOWPASS .set 1
.global start,fir
.mmregs
COFF_FIR_START: .sect  "coff_fir"
.if LOWPASS
.include "lowpass\lowpass.inc"
.elseif BANDPASS
.include "bandpass\bandpass.inc"
.else
.include "highpass\highpass.inc"
.endif

K_FIR_BFFR .set 32
d_data_buffer .usect "fir_bfr",64
FIR_DP .usect "fir_vars",0
d_filin .usect "fir_vars",1
d_filout .usect "fir_vars",100h
output .usect "fir_vars",1

.asg AR4,FIR_DATA_P
.asg AR6,INBUF_P
.asg AR7,OUTBUF_P
.asg AR3,OUTBUF
.sect "fir_prog"
nop
start:
LD #FIR_DP,DP
STM #d_data_buffer,FIR_DATA_P
RPTZ A,#K_FIR_BFFR-1
STL A,*FIR_DATA_P+
STM #d_filin,INBUF_P
STM #d_filout,OUTBUF_P
STM #output,OUTBUF
STM #100h,BK
fir_loop:
NOP ;Add Breakpoint & porbe point
LD *INBUF_P,A
CALL fir
STH A,*OUTBUF_P+%
STH A,*OUTBUF
main_end:
b fir_loop

fir:
; SSBX SXM
; SSBX FRCT
STM #d_data_buffer,FIR_DATA_P
STL A,*FIR_DATA_P
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

RET
.end

2万 · 2013-5-26 15:40

这个绝对有难度汇编使用的人太少了

只看该作者 · 2013-5-26 22:30

只要某一块的功能大致介绍一下就可以了，不用太详细的啦~ 求破啊！

1万 · 2013-5-27 09:26

本帖最后由 jlass 于 2013-5-27 09:28 编辑

大致给你讲一下
start:到main_end:是主函数
fir_loop到main_end是死循环调用fir函数（call fir）
b是无条件跳转
fir到RET（返回）是fir函数的主题
fir_task到RET中间的两句就是关键的算法
RPTZ：清累加器，重复下一句
MACD：带数据移位的乘累加指令

剩下的stl，sth，stm，ld都是赋值语句

只看该作者 · 2013-5-27 12:17

这样就很好啊，感谢大神！！！！！！！！！

只看该作者 · 2013-5-27 13:04

jlass 发表于 2013-5-27 09:26
大致给你讲一下
start:到main_end:是主函数
fir_loop到main_end是死循环调用fir函数（call fir）

HIGHPASS       .set       0          ;if you want to use ,please set the value to 1
BANDPASS       .set       0
LOWPASS             .set       1
      .global       start,fir
      .mmregs
COFF_FIR_START: .sect  "coff_fir"
      .if LOWPASS
      .include       "lowpass\lowpass.inc"
      .elseif BANDPASS
      .include       "bandpass\bandpass.inc"
      .else
      .include       "highpass\highpass.inc"
      .endif

K_FIR_BFFR             .set       32
d_data_buffer       .usect       "fir_bfr",64
FIR_DP                      .usect       "fir_vars",0
d_filin                      .usect       "fir_vars",1
d_filout                .usect       "fir_vars",100h
output                      .usect       "fir_vars",1

      .asg       AR4,FIR_DATA_P
      .asg       AR6,INBUF_P
      .asg       AR7,OUTBUF_P
      .asg       AR3,OUTBUF
      .sect       "fir_prog"
      nop

是什么功能？