PC课程设计.docx

PC课程设计.docx

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PC课程设计

发送试验程序

INTT1EQU0020H

INTT2EQU0021H

INTQ3EQUINTP3

CODESEGMENT

ASSUMECS:

CODE

ORG1000H

START:

MOVAX,0H

MOVDS,AX

MOVES,AX

MOVDI,002CH

LEAAX,INTQ3

MOV[DI],AX

INCDI

INCDI

MOVAX,CS

MOV[DI],AX

INCDI

INCDI

MOVAL,13H

MOVDX,INTT1

OUTDX,AL

MOVAL,08H

MOVDX,INTT2

OUTDX,AL

MOVAL,09H

OUTDX,AL

MOVAL,86H;8255控制字

MOVDX,063H

OUTDX,AL

MOVAL,00000101B

OUTDX,AL

MOVAL,80H;8250初始化设置波特率24001000000允许访问除数寄存器

MOVDX,073H

OUTDX,AL

MOVDX,071H

MOVAL,0

OUTDX,AL;写入除数寄存器高字节00

MOVDX,070H

MOVAL,34H

OUTDX,AL;写入除数寄存器低字节30H

MOVAL,00001111B;线路控制字八位字符2位停止位偶校验

MOVDX,073H

OUTDX,AL

MOVAL,00H;允许中断

MOVDX,071H

OUTDX,AL

STI;开中断

DENG:

JMPDENG;等待中断

INTP3:

CLI

MOVDX,61H

INAL,DX

NOTAL

MOVDX,60H

OUTDX,AL

MOVBL,AL;保护数据

ONE:

MOVDX,075H

INAL,DX

TESTAL,60H

JZONE;发送缓冲器满则等待

MOVAL,BL

MOVDX,070H

OUTDX,AL

MOVAL,20H

MOVDX,INTT1

OUTDX,AL

STI

IRET

CODEENDS

ENDSTART

接收试验程序

APORTEQU60H

CONTREQU63H

CW1EQU80H

CODESEGMENT

ASSUMECS:

CODE

START:

MOVAL,80H

MOVDX,0073H

OUTDX,AL

MOVDX,0071H

MOVAL,0

OUTDX,AL

MOVDX,0070H

MOVAL,34H

OUTDX,AL

MOVAL,00001111B

MOVDX,0073H

OUTDX,AL

MOVAL,00H

MOVDX,0071H

OUTDX,AL

MOVAL,CW1

MOVDX,CONTR

OUTDX,AL

ONE:

MOVDX,0075H

INAL,DX

TESTAL,01H

JZONE

MOVDX,0070H

INAL,DX

MOVDX,APORT

OUTDX,AL

CODEENDS

ENDSTART

发送试验箱连线

发送试验箱开始运行

接收试验箱连线

发送试验箱发送数据的LED灯状态

接收试验箱接收数据的LED状态

运行过程，连个箱子LED灯状态相同

8250原理图

8259原理图