新手请老师帮说明下面汇编程序标注

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moming8470| 禁止发言

楼主 | 2008-12-18 11:55 | 只看该作者回帖奖励

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汇编程序, IO, code, define, AI

.define P_IOA_Data 0x7000
.define P_IOA_Dir 0x7002
.define P_IOA_Attrib 0x7003
.define dog_Clear 0x7012
.ram
.var s1,s2,k=100;
.data
data_code:.dw 0x003f,0x0006,0x005b,0x004f,0x0066,0x006d,0x007d,0x0007,0x007f,0x006f
bit_code:.dw 0x0200,0x0100
.code
.public _main
_main:
r1=0x03ff
[P_IOA_Dir]=r1
[P_IOA_Attrib]=r1
r1=0x0000
[P_IOA_Data]=r1
r3=0
[s1]=r3
[s2]=r3

//---------------------------
//display doub data
//---------------------------
loop0:
r1=60
[k]=r1
loop1:
bp=data_code
r1=[s1]
r1=r1+bp
r2=bit_code
r3=[r1]    //- ;取数码
r4=[r2]    // ;取位码
r3=r3+r4   // ;
[P_IOA_Data]=r3
call _delay2

r1=[s2]
r1=r1+bp
r3=[r1]
r2=bit_code
r2=r2+1
r4=[r2]
r3=r3+r4
[P_IOA_Data]=r3
call _delay2

r1=[k]
r1-=1
[k]=r1
cmp r1,0
jne loop1

r1=[s1]
r1+=1       //;指向下一个数码
[s1]=r1
cmp r1, 9
jle loop0

r1=0
[s1]=r1
r4=[s2]
r4+=1
[s2]=r4

r4=[s2]
cmp r4,9
jle loop0
r4=0
[s2]=r4
jmp loop0

r3+=1
r1=data_code
r2=bit_code

loop:
r3=[r1++]
r4=[r2]
r3=r3+r4
[P_IOA_Data]=r3
//call _delay1
jmp  loop

.public _delay2
_delay2:
r3=0x0000
lop2:
r4=1
[dog_Clear]=r4
r3+=1
cmp r3 ,0x03ff
jne lop2
retf

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