请各位高手能帮我解决这个分析的问题!本人不甚感激~
详细的分析~谢谢
org0000h
jmpmain
org 000bh
ljmp time0
org 0030h
main:
mov 20h,#00h
mov 21h,#00h
mov 22h,#00h
mov 10h,#20
mov th0,#3ch
mov tl0,#0b0h
mov tmod,#11h
setb ea
setb et0
setb tr0
loop:
lcall display
lcall anj
sjmp loop
anj:
jnb p1.1,s_jia1
jnb p1.3,s_jia2
jnb p1.5,s_jia3
jnb p1.0,s_jian4
jnb p1.2,s_jian5
jnb p1.4,s_jian6
lzq: ret
s_jia1:
lcall display
jnb p1.1,s_jia1
mov a,22h
add a,#01h
da a
mov 22h,a
cjne a,#24h,lzq
mov 22h,#00h
ljmp lzq
s_jia2:
lcall display
jnb p1.3,s_jia2
mov a,21h
add a,#01h
da a
mov 21h,a
cjne a,#60h,lzq
mov 21h,#00h
ljmp lzq
s_jia3:
lcall display
jnb p1.5,s_jia3
mov a,20h
add a,#01h
da a
mov 20h,a
cjne a,#60h,lzq
mov 20h,#00h
s_jian4:
lcall display
jnb p1.0,s_jian4
mov a,22h
add a,#99h
da a
mov 22h,a
cjne a,#99h,lzq
mov 22h,#23h
s_jian5:
lcall display
jnb p1.2,s_jian5
mov a,21h
add a,#99h
da a
mov 21h,a
cjne a,#99h,lzq
mov 21h,#59h
s_jian6:
lcall display
jnb p1.4,s_jian6
mov a,20h
add a,#99h
da a
mov 20h,a
cjne a,#99h,lzq
mov 20h,#59h
ljmp lzq
display:
chaizi:
mov a,20h
anl a,#0FH
mov 30h,a
mov a,20h
swap a
anl a,#0fh
mov 31h,a
mov a,21h
anl a,#0fh
mov 32h,a
mov a,21h
swap a
anl a,#0fh
mov 33h,a
mov a,22h
anl a,#0fh
mov 34h,a
mov a,22h
swap a
anl a,#0fh
mov 35h,a
mov dptr,#tab
mov a,30h
movc a,@a+dptr
mov p0,a
mov p2,#0feh
lcall delay
mov p0,#00h
mov p2,#0ffh
mov a,31h
movc a,@a+dptr
mov p0,a
mov p2,#0fdh
lcall delay
mov p0,#00h
mov p2,#0ffh
mov p0,#40h
mov p2,#0fbh
lcall delay
mov p0,#00h
mov p2,#0ffh
mov a,32h
movc a,@a+dptr
mov p0,a
mov p2,#0f7h
lcall delay
mov p0,#00h
mov p2,#0ffh
mov a,33h
movc a,@a+dptr
mov p0,a
mov p2,#0efh
lcall delay
mov p0,#40h
mov p2,#0dfh
lcall delay
mov p0,#00h
mov p2,#0ffh
mov a,34h
movc a,@a+dptr
mov p0,a
mov p2,#0bfh
lcall delay
mov p0,#00h
mov p2,#0ffh
mov a,35h
movc a,@a+dptr
mov p0,a
mov p2,#07fh
lcall delay
ret
time0:
mov th0,#3ch
mov tl0,#0b0h
djnz 10h,lq
mov 10h,#20
mov a,20h
add a,#01h
da a
mov 20h,a
cjne a,#60h,lq
mov 20h,#00h
mov a,21h
add a,#01h
da a
mov 21h,a
cjne a,#60h,lq
mov 21h,#00h
mov a,22h
add a,#01h
da a
mov 22h,a
cjne a,#24h,lq
mov 22h,#00h
lq:reti
ret
tab:db 3fh,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh
ret
delay:
movr7,#2
ly3:movr6,#1
ly2:movr5,#123
ly1:djnzr5,ly1
djnzr6,ly2
djnzr7,ly3
ret
end
还能希望在上面扩展一个日期显示功能或者闹钟功能并予以分析,谢谢!
希望分析的是汇编而不是C 因为这是我们大学的考试题目,老师要问的..我不知道分析!
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