《微机原理与接口技术》实训程序代码.docx

《微机原理与接口技术》实训程序代码.docx

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《微机原理与接口技术》实训程序代码

实训1排序程序设计

六．参考代码

DATASEGMENT

DW0055H，0033H,0066H,0077H,0099H,0011H,0022H,0088H,0044H,0000H

DATAENDS

CODESEGMENT

ASSUMECS:

CODE,DS:

DATA

START:

MOVAX,DATA

MOVDS,AX

MOVCX,9

LOOP1:

MOVDX,CX

MOVBX,0

LOOP2:

MOVAX,[BX]

INCBX

INCBX

CMPAX,[BX]

JLEDONE；小于或等于转移

XCHG[BX],AX

DECBX

DECBX

MOV[BX],AX

INCBX

INCBX

DONE:

DECDX

JNELOOP2

LOOPLOOP1

MOVAX,4C00H

INT21H

CODEENDS

ENDSTART

实训二8259A外部中断

六．参考代码

CS273equ8000H

ICW1euq00010011b;单片8259,上升沿触发中断,写ICW4ICW2equ00100000b;中断号为20HICW4equ00000001b;工作在8086/88方式OCW1equ11111110b;只响应IR0CS8259Aequ0A000hCS8259Bequ0A001h

datasegment

CNTdb0

dataends

codesegment

asummecs:

code,ds:

dta

ienterprocnear

pushax

pushdx

movdx,CS273

incCNT

moval,CNT

outdx,al；输出计数值

movdx,CS8259A

moval,20h

outdx,al

popdx

popax

iret

ienterendp

iinitproc

movdx,CS8259A

moval,ICW1

outdx,al

movdx,CS8259B

moval,ICW2

outdx,al

moval,ICW4

outdx,al

moval,OCW1

outdx,al

ret

iinitendp

startprocnear

cli

movax,0

movds,ax

movbx,4*ICW2

movax,code;

movax,offsetienter；中断入口地址（段地址为0）

mov[bx],ax

movax,0

incbx

incbx

mov[bx],ax；代码段地址为0

calliinit

movax,data

movds,ax

movCNT,0；计数初值为0

moval,CNT

movdx,CS273

outdx,al

sti

LP:

nop；等待中断

jmpLP

startendp

codeends

endstart

实训三8255输入/输出

七．参考代码

modeequ082h;方式0，PA，PC输出，PB输入PortAequ8000h;PortAPortBequ8001h;PortB

PortCequ8002h;PortC

CAddrequ8003h;控制字地址

codesegment

assumecs:

code

startprocnear

Start:

moval,mode

movdx,CAddr

outdx,al;输出控制字

moval,80H

movcx,08H

OutA:

movdx,PortA

outdx,al;输出PortA

movdx,PortC

outdx,al

shral,1;移位

movah,100

calldelay;延时

loopOutA

delayprocnear

pushax

moval,0

pushcx

movcx,ax

loop$

popcx

popax

ret

delayendp

codeends

enfstart

实训48251A串行通讯

七．参考代码

CS8251Dequ8000h；8251控制口地址

CS8251Cequ8001h

datasegment

sourcedb256dup（055h）

targetdb256dup（0aah）

RBufdb0

TBufdb0

dataends

codesegment

assumecs:

code,ds:

data

IInitprocnear；8251初始化

movdx,CS8251C

moval,01001111b；1位停止位，无校验，8位数据，波特率因子64

outdx,al

moval,00010101b；清除错标志，允许发送接收

ret

IInitendp

sendprocnear；串口发送

movdx,CS8251C

moval,00010101b

outdx,al

WaitTXD:

inal,dx

testal,1；发送缓冲器是否为空

jzWaitTXD

moval,TBuf；取要发送的字

movdx,CS8251D

outdx,al；发送数据

ret

sendendp

receiveprocnear；串行接收

movdx,CS8251C

WaitRXD:

inal,dx

testal,2；是否已收到一个字

jeWaitRXD

movdx,CS8251D

inal,dx；读取接收的字

movRBuf,al

ret

receiveend

startprocnear

movax,data

moves,ax

movsi,offsetsource

movdi,offsettarget

movcx,256

movds,ax

callIInit

MLoop:

movdx,CS8251C

inal,dx；是否接收下一个字

testal,2

jnercvdata

cmpcx,0

jeMLoop

moval,[si]

incsi

movTbuf,al

callsand

loopMLoop

jimpMLoop

rcvdata:

callreceive；读入接收的字

moval,RBuf

mov[di],al

incdi

jmpMLoop

startendp

codeends

end

实训58253计数器

七．参考代码

CONTROLequ08003h

COUNT0equ08000hCOUNT1equ08001hCOUNT2equ08002hcodesegmentassumecs:

codetartprocnearmoval,36h;00110110B;计数器0,16位,方式3,二进制

movdx,CONTROL

outdx,al

movax,10000

movdx,COUNT0

outdx,al;计数器低字节

moval,ah

outdx,al;计数器高字节

moval,76h;01110110B;计数器1,16位,方式3,二进制

movdx,CONTROL

outdx,al

movax,100

movdx,COUNT1

outdx,al;计数器低字节

moval,ah

outdx,al;计数器高字节

jmp$

startendp

codeends

endstart

实训6交通灯控制

六．参考代码

appmacroyy；控制显示宏指令

movdx,03c1h

moval,yy

outdx,al

movcx,00d0h

calldelay

endm

fresmacroxx,yy；控制闪烁宏指令

appxx

appyy

endm

tsmacroxx；控制测试宏指令

movdx,03c0h

inal,dx

testal,xx

endm

codesegmnetstack‘stack’

magdb‘outofwok!

’,0ah,0dh,24h

assumeds:

code,cs:

code,es:

code,ss:

code

start:

movax,cs

movds,ax

moves,ax

movss,ax

moval,90h

movdx,3c3h

outdx,al；置8255a方式字,使A口输入,B口输出

callzjdn

callfjdn

go:

app0ch；主干道通行

movcx,40h

b0:

pushcx

callzjdn

callfjdn

app0ch

popcx

loopb0

movcx,00d0h

calldelay

callczf；从主干道通行变为支通行

callzjdn

callfjdn

callczf

app21h；支路通行

movcx,20h

b2:

pushcx

callzjdn

app21h

popcx

loopb2

callcfz；从支路通行变为主干道通行

callzjdn

callfjdn

callcfz

movah,01h

int16h

zjagain

jnzexit；有键盘输入,结束运行

again:

jmpgo

exit:

movah,09h

movdx，offsetmsg

int21h

movah,4dh

int21h

zjdnprocnear；检测主干道特种车子程序,一旦有就放行

pushcx

ts01b

jzp1

movdx,03c1h

inal,dx

testal,21h

jzs1

callcfz

s1:

app0ch

movcx,0200h

calldelay

p1:

popcx

ret

zjdnendp

fjdnprocnear；检测支路特种车子程序,如有且主干道无才放行

pushcx

ts01b

jzff

callzjdn

ff:

ts02h

jzp2

movdx,03c1h

inal,dx

testal,0ch

jzs2

callczf

s2:

app21h

movcx,0200h

calldelay

p2:

popcx

ret

fjdnendp

delayproc；延时子程序

d2:

movax，0100h

dela:

decax

jnzdela

loopd2

ret

delayendp

cfzprocnear

pushcx

movbx,03h

w3:

fres11h,10h

decbx

jnzw3

popcx

ret

cfzendp

czfprocnear；从主干道通行变为支路通行

pushcx

movbx,03h

w1:

fresoah,02h

decbx

jnzw1

popcx

ret

czfendp

db200dup（?

）

endstart