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我需要编写用户输入无符号数的程序，显示器将指示该数是奇数、偶数还是等于零

我遇到的问题是它在 7 段中显示 Z 的任何数字，这是不正确的所以，我不知道问题出在哪里。谁能帮我解决这个问题。

LEDS       EQU     $E00010                 ;LEDS adress
SW         EQU      $E00012                 ;switch address
BU         EQU     $E00014                 ;button address

one        EQU      $E00000                 ;7 segment display address 1

two        EQU     $E00002
three      EQU     $E00004
four       EQU      $E00006
five        EQU     $E00008
six         EQU     $E0000A
seven       EQU     $E0000C
eight       EQU     $E0000E
             ORG     $400                    ;start of program area
START



Loop

         MOVE.B  D0,LEDS     
            MOVE.B  SW,D1
           MOVE.B  BU,D2
            MOVE.B  #0,D3  
           MOVE.B  #0,D0                    ; LEDS is off
           MOVE.B  #0,one                   ;7 segment is off
           MOVE.B   #0,two
            MOVE.B  #0,three
            MOVE.B  #0,four
            MOVE.B  #0,five
            MOVE.B  #0,six
            MOVE.B  #0,seven
            MOVE.B  #0,eight    
            MOVE.B  #%1101101,one             ;display S  on 7 segment 
            NOT.B   D2                      ; flip value of button
            CMP.B   #%00000001,D2         ;if the right button is clicked
            BNE     Loop                
            MOVE.B  D1,D0     ;THEN MOVE SWICH VALUES ON LEDS
            MOVE.B  D0,LEDS
            MOVE.B  #0,one
            CMP.B   D1,D3
            BEQ     ZERO
            DIVS.W  #2,D1                   
            CMP.B    D1,D3                  ;IF D1=D3 WHICH ZERO, THEN
            BEQ     EVEN                      ; NUMBER IS ODD
            BRA     ODD                    ; ELSE DISPLAY EVEM
EVEN          MOVE.B  #%1111001,one            
ODD         MOVE.B  #%0111111,one          
ZERO         MOVE.B    #%1011001,one 

            END      START
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1 回答 1

0

这个：

BEQ     EVEN                      ; NUMBER IS ODD

看起来应该是：

BEQ     ODD                      ; NUMBER IS ODD
于 2017-01-27T19:23:56.927 回答