数字电子钟设计说明书 - 图文

MOV ADD DA

MOV CJNE MOV RET

;----------

A, A, A 51H, A, 51H,

51H #01H A

#60H,EXIT #00H

;如加1键按下直接清零秒 ;子程序返回

;十进制调整

;减1子程序 ;----------

DEC_KEY:CJNE CJNE MOV ADD DA MOV CJNE MOV 出 MOV ADD DA

MOV CJNE MOV MOV A, ADD A, DA A

A, A, A 52H, A, 52H, 51H #99H

;十进制调整

52H #99H A

#99H,EXIT #59H

;选择键功能标志为3调秒,否则跳出

;十进制调整

R1, A, A, 53H, A, 53H,

R5,

#04H,EXIT ;减1键键值

;选择键功能标志为1调时,否则跳出

#01H,NEXT3 53H #99H A

#99H,EXIT #23H

#02H,NEXT4 ;选择键功能标志为2调分,否则跳

;十进制调整

A

NEXT3:CJNE R1,

NEXT4:CJNE R1, #03H, EXIT

MOV 51H, A CJNE A, #99H,EXIT MOV 51H, #59H RET

;子程序返回

39

;----------- ;返回子程序 ;----------- EXIT: RET ;----------------- ;数码管字形编码表 ;-----------------

TABLE:DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H,0FFH ;\,\,\,\,\,\,\,\,\,9\,\不显示\

TABLE1:DB 0FFH,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H,0FFH ;小时编码

;\不显示\,\,\,\,\,\,\,\,\,\,\不显示\END

;子程序返回

40

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