汇编程序求注释

1万 · 2016-3-28 20:05

FIR低通滤波
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

1万 · 2016-3-28 20:06

这个绝对有难度汇编使用的人太少了

1万 · 2016-3-28 20:07

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 · 2016-3-28 20:08

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

2万 · 2016-3-28 20:09

正解，剩下的stl，sth，stm，ld都是赋值语句

1万 · 2016-3-28 20:09

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？