sinwave_generate.asm

fir的c语言程序

      stl    A,*ar6-
          
      mvmm   ar7,ar5      ;90~180
      mvmm   ar5,ar4
      mar    *+ar5(-2)
      rpt    #88
      mvdd   *ar5-,*ar4+
      
      stm    #result,ar3   ;181~359
      stm    #179,brc
      rptb   loop2-1
      ld     *ar3+,A
      neg    A
      stl    A,*ar4+   
loop2:
      stm    #result,ar4
      stm    360,BK
          
      ld     @ratio,A      ;实现再采样
      sub    #1,A
      bcd    u,ALEQ
      sub    #1,A
      nop
      stl    A,@ratio
loop3:        
      rpt    @ratio
      mar    *ar4+%          
      bd     loop3
      mvdk   *ar4+%,@output
      
u:    bd     u
      mvdk   *ar4+%,@output                      
      .end