硬件课程设计日历.doc

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系统模块详细设计与调试

1?在主程序中要分别对8254和8255初始化编程。

具体如下：

8254控制字：

?MOV?DX,PORT_8253?

?MOV?AL?;写入控制字，0通道，方式2?

?OUT?DX

?MOV?DX,PORT_0?

?MOV?AL,00H?

?OUT?DX

?MOV?AL,10H?

?OUT?DX

?MOV?DX,PORT_8253?

?MOV?AL?;1通道，方式3?

?OUT?DX

?MOV?DX,PORT_1?

?MOV?AL,00H?

?OUT?DX

?MOV?AL,10H?

?OUT?DX

8255控制字：

MOV?DX,PORT_8255?;8255初始化

?MOV?AL,80H?

OUT?DX

程序清单与注释:

PORT_AEQU288H

PORT_BEQU289H

PORT_CEQU28AH

PORT_8255EQU28BH

PORT_0EQU280H

PORT_1EQU281H

PORT_2EQU282H

PORT_8253EQU283H

DATASEGMENT

;01234567

TABLE1DB77H,7BH,7DH,7EH,0B7H,0BBH,0BDH,0BEH

;89ABCDEF

DB0D7H,0DBH,0DDH,0DEH,0E7H,0EBH,0EDH,0EEH

HZ_SEC02DW0A3B0H

HZ_SEC01DW0A3B0H

HZ_MIN02DW0A3B0H

HZ_MIN01DW0A3B0H

HZ_HOU02DW0A3B0H

HZ_HOU01DW0A3B0H

HZ_TIMDW0A1C3H;符号

HZ_SYMDW0A1C

HZ_YEAR02DW0A3B0H

HZ_YEAR01DW0A3B0H

HZ_MON02DW0A3B1H

HZ_MON01DW0A3B0H

HZ_DAY02DW0A3B1H

HZ_DAY01DW0A3B0H

HZ_DATEDW0A3AFH

HZ_WEEKDW0A3B6H

HZ_WEEK01DW0D0C7H;字体星

HZ_WEEK02DW0C6DAH;字体期

HZ_XDW0A1EFH;符号★

HZ_WDW0CDF2H;字体万

HZ_NDW0C4EAH;字体年

HZ_RDW0C8D5H;字体日

HZ_LDW0C0FAH;字体历

HZ_ADRDB?

DATAENDS

STACK1SEGMENTSTACK

DW50DUP(0)

TOP_STACLABELWORD

STACK1ENDS

CODESEGMENT

ASSUMECS:CODE,DS:DATA

START:

MOVAX,STACK1

MOVSS,AX

LEASP,TOP_STAC

MOVAX,DATA

MOVDS,AX

MOVDX,PORT_8255;8255初始化

MOVAL,80H

OUTDX,AL

CALLCLEAR;LCD去除

CALLFUCTION_A;日期显示

;8253的编程

MOVDX,PORT_8253

MOVAL;写入控制字，0通道，方式2

OUTDX,AL

MOVDX,PORT_0

MOVAL,00H

OUTDX,AL

MOVAL,10H

OUTDX,AL

MOVDX,PORT_8253

MOVAL;1通道，方式3

OUTDX,AL

MOVDX,PORT_1

MOVAL,00H

OUTDX,AL

MOVAL,10H

OUTDX,AL

MAIN:

LP:

MOVDX,PORT_C

TESTDX,10H;检测B口是否有1秒脉冲

JNZLP

TESTDX,00H

JNZLP

INCHZ_SEC02;秒的个位加一

;判断是否有键按下

MOVDX,PORT_8255

MOVAL;A口输出B口输入C口低四位输出,高四位输入

OUTD