接口课程设计实现特定功能的键盘及LED显示

1、实现特定功能的键盘及LED显示了解键盘及LED显示接口原理，设计实验电路图完成以下功能：1. 按1键显示年；2. 按2键显示月日；3. 按3键显示GOOD ；4. 按4键数码管由左到右字符“0”循环显示。5自行设计特效显示功能。CODE SEGMENTASSUME CS:CODE,DS:CODESTART:MOV AX,CSMOV DS,AXINPUT: CALL KEYBOARD LEA SI,KEYBUFFER;取按键的值 MOV AL,SI CMP AL,1 JNZ L0 JMP SHOW_YEAR ;显示年L0: CMP AL,2 JNZ L1 JMP SHOW_MD ;显示月日L1:

2、 CMP AL,3 JNZ L2JMP SHOW_GOOD ;显示GOODL2: CMP AL,4 JNZ L3 JMP SHOW_0 ;由左到右字符“0”循环显示L3: CMP AL,7 JNZ L4 JMP SHOW_SUN ;显示SUNL4: JMP SHOW_HERO;显示HERO;-结束- ;-显示年开始- SHOW_YEAR:MOV CH,01111111B;初始化位选码01111111B MOV BH,11110111B;显示位选结束位LEA SI,YEARBUFFERCALL DISPLAYDEC COUNT;重复显示COUNT次JNZ SHOW_YEARMOV COUNT,2

3、50JMP INPUT;-结束-;-显示月开始-SHOW_MD:MOV CH,01111111B;初始化位选码01111111B MOV BH,11110111B;显示位选结束位LEA SI,MDBUFFERCALL DISPLAYDEC COUNT;重复显示COUNT次JNZ SHOW_MDMOV COUNT,250JMP INPUT;-结束- ;-显示GOOD-SHOW_GOOD:MOV CH,01111111B;初始化位选码01111111B MOV BH,11110111B;显示位选结束位LEA SI,GOODBUFFERCALL DISPLAYDEC COUNT;重复显示COUNT次

4、JNZ SHOW_GOODMOV COUNT,250JMP INPUT;-结束-;-显示HERO-SHOW_HERO:DE:MOV CH,01111111B ;初始化位选码01111111B LEA SI,HEROBUFFERMOV BH,11110111B ;显示位选结束位CALL DISPLAYDEC COUNT;重复显示COUNT次JNZ SHOW_HEROMOV COUNT,10DEC XUNMOVCOUNT,10CALL SHOWDELAY_HCMP XUN,00H;闪光显示JNZ DEMOV XUN ,15MOV COUNT ,250JMP INPUT;-结束-;-显示由左到右字符

5、“0”循环-SHOW_0:MOV BX,3 LSHOW0:MOV CH,01111111B;初始化位选码01111111LEA DI,LINBUFFERMOV AL,80HMOV DX,203HOUT DX,AL;再次初始化8255DISPLAY_0:MOV AL,CHMOV DX,202HOUT DX,AL;位选码送PC口MOV AL,DIMOV DX,200H;MOV AL,5BHOUT DX,AL;显示段码CALL SHOWDELAY0ROR CH,1;指向下一个数码管CMP CH,11110111BJNZ DISPLAY_0DEC BX;重复显示3次JNZ LSHOW0JMP INPU

6、T;-结束-;-显示SUN-SHOW_SUN:MOV CH,01111111B;初始化位选码01111111BMOV BH,11101111B ;显示位选结束位LEA SI,SUNBUFFERCALL DISPLAYDEC COUNT;重复显示COUNT次JNZ SHOW_SUNMOV COUNT,250JMP INPUT;-结束-;-显示延时-SHOWDELAY PROC NEARPUSH BXPUSH CXMOV BX,10SHOWDEL1:MOV CX,100SHOWDEL2:LOOP SHOWDEL2DEC BXJNZ SHOWDEL1POP CXPOP BXRETSHOWDELAY

7、ENDP;-结束-;-显示延时0-SHOWDELAY0 PROC NEARPUSH BXPUSH CXMOV BX,100SHOW0DEL1:MOV CX,2000SHOW0DEL2:LOOP SHOW0DEL2DEC BXJNZ SHOW0DEL1POP CXPOP BXRETSHOWDELAY0 ENDP;-结束-SHOWDELAY_H PROC NEARPUSH BXPUSH CXMOV BX,10SHOW_HDEL1:MOV CX,2000SHOW_HDEL2:LOOP SHOW_HDEL2DEC BXJNZ SHOW_HDEL1POP CXPOP BXRETSHOWDELAY_H E

8、NDP;-显示程序-DISPLAY PROC NEARMOV AL,80HMOV DX,203HOUT DX,AL;再次初始化8255DISPLAY1:MOV AL,CHMOV DX,202HOUT DX,AL;位选码送PC口MOV AL,SIMOV DX,200HOUT DX,AL;显示段码CALL SHOWDELAY;延时INC SIROR CH,1;指向下一个数码管CMP CH,BHJNZ DISPLAY1RETDISPLAY ENDP;-结束-;-读取按键盘-KEYBOARD PROC NEARLEA SI,KEYBUFFERMOV AL,10000001B;初始化8255控制字MOV

9、 DX,203HOUT DX,AL KS1: CALL KS;读取按键 CMP AL,0FH ;判断有无按键 JZ KS1 CALL DELAY CALL KS CMP AL,0FH JZ KS1 MOV BL,0EFH;初始化列码 MOV BH,0;初始化列计数器AGAIN: MOV DX,202H MOV AL,BL OUT DX,AL;输出列码 IN AL,DX;读取行码 AND AL,0FH CMP AL,0FH JZ NEXT;该列无键闭合，准备下一列扫描 CMP AL,0DH;判断列是否是第一个键闭合？ JNZ TWO MOV AL,1 JMP FREE TWO:;判断列是否是第二

10、个键闭合？ CMP AL,0BH JNZ THREE MOV AL,4 JMP FREE THREE:;判断列是否是第三个键闭合？ CMP AL,07H JNZ NEXT MOV AL,7 FREE: PUSH AX WAIT1: CALL KS CMP AL,0FH JNZ WAIT1 POP AX ADD AL,BH MOV SI,AL;保存键值，并返回 JMP RETURNNEXT: INC BH ROL BL,1 CMP BL,0FEH JNZ AGAIN JMP KS1KS PROC NEAR MOV DX,202H MOV AL,0FH OUT DX,AL IN AL,DX AND AL,0FH RET KS ENDPDELAY PROC NEAR PUSH BX PUSH CX MOV BX,2000 DEL1: MOV CX,10 DEL2: LOOP DEL2 DEC BX JNZ DEL1 POP CX POP BX RET DELAY ENDPRETURN:RETKEYBOARD ENDPEXIT:MOV AH,4CHINT 21HXUN DB 15YEARBUFFER DB 5BH,3FH,3FH,6FH ;存放年2009MDBUFFER DB 3FH,6FH,3FH,66H;存放