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;;;===汽車尾燈設計===;;;
;定義8255的地址
PA8255 EQU 0200H
PB8255 EQU 0202H
PC8255 EQU 0204H
CON8255 EQU 0206H
;定義8253的部分地址
P8253T0 EQU 0400H
P8253CON EQU 0406H
STACK SEGMENT
STK DB 200 DUP(0)
TOP DW $-STACK
STACK ENDS
CODE SEGMENT
ASSUME CS:CODE,SS:STACK
START:
MOV DX,STACK
MOV SS,DX
MOV SP,TOP
;8255初始化
MOV AL,82H ;1000 0010
MOV DX,CON8255
OUT DX,AL
MOV DX,PA8255
MOV AL,0FFH
OUT DX,AL
;;;===每種狀態輸出對應的數據===
;;;===例如（0200H）=1111 0101 左轉時，先是前后左燈亮0.5s
;;;===然后燈全滅0.5s。高四位保存全滅狀態，低四位保存前后左燈亮狀態
;;;===所以左轉時，只要把（0200H）=1111 0101左移四位即可。
MOV SI,0200H
MOV AL,0FAH
MOV [SI],AL
MOV [SI+1],0F5H
MOV [SI+2],0F0H
MOV [SI+3],00H
MOV [SI+4],50H
MOV [SI+5],0A0H
BEGIN:
MOV DX,PB8255
IN AL,DX
AND AL,1FH
CMP AL,1EH
JZ NEXT1 ;左轉
CMP AL,1DH
JZ NEXT2 ;右轉
CMP AL,1BH
JZ NEXT3 ;雙閃
CMP AL,17H
JZ NEXT4 ;剎車
CMP AL,0FH
JZ NEXT5 ;夜間
CMP AL,0EH
JZ NEXT6 ;夜間+左轉
CMP AL,0DH
JZ NEXT7 ;夜間+右轉
INIT:
MOV DX,PA8255
MOV AL,0FFH
OUT DX,AL
JMP BEGIN
NEXT1:
CALL LEFT
JMP BEGIN
NEXT2:
CALL RIGHT
JMP BEGIN
NEXT3:
CALL SHUAN_SHAN
JMP BEGIN
NEXT4:
CALL SHA_CHE
JMP BEGIN
NEXT5:
CALL NIGHT
JMP BEGIN
NEXT6:
CALL NIGHT_LEFT
JMP BEGIN
NEXT7:
CALL NIGHT_RIGHT
JMP BEGIN
;;;===左轉右轉等子程序
LEFT PROC
MOV DX,PA8255
MOV AL,[SI]
OUT DX,AL
CALL DELAY
ROL AL,4
MOV [SI],AL
RET
LEFT ENDP
RIGHT PROC
MOV DX,PA8255
MOV AL,[SI+1]
OUT DX,AL
CALL DELAY
ROL AL,4
MOV [SI+1],AL
RET
RIGHT ENDP
SHUAN_SHAN PROC
MOV DX,PA8255
MOV AL,[SI+2]
OUT DX,AL
CALL DELAY
ROL AL,4
MOV [SI+2],AL
RET
SHUAN_SHAN ENDP
SHA_CHE PROC
MOV DX,PA8255
MOV AL,[SI+3]
OUT DX,AL
CALL DELAY
ROL AL,4
MOV [SI+3],AL
RET
SHA_CHE ENDP
NIGHT PROC
MOV DX,PA8255
MOV AL,[SI+3]
OUT DX,AL
CALL DELAY
ROL AL,4
MOV [SI+3],AL
RET
NIGHT ENDP
NIGHT_LEFT PROC
MOV DX,PA8255
MOV AL,[SI+4]
OUT DX,AL
CALL DELAY
ROL AL,4
MOV [SI+4],AL
RET
NIGHT_LEFT ENDP
NIGHT_RIGHT PROC
MOV DX,PA8255
MOV AL,[SI+5]
OUT DX,AL
CALL DELAY
ROL AL,4
MOV [SI+5],AL
RET
NIGHT_RIGHT ENDP
;;;===延時程序
DELAY PROC
PUSH AX
MOV AL,10H ;0001 0000,8位計數器,方式0,BCD碼計數
MOV DX,P8253CON ;寫入工作方式控制字
OUT DX,AL
MOV AL,5H ;給T0賦初值
MOV DX,P8253T0
OUT DX,AL
L2:
MOV DX,PB8255
IN AL,DX
AND AL,20H
CMP AL,00H
JZ L2
POP AX
RET
DELAY ENDP
CODE ENDS
END START

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;;;=== Create By XuHe 2018 1.18 ===;;;
;;;===可加速、減速流水燈===;;;
;;;===初始時，時間間隔為一秒，按加速鍵加速
;;;===按減速鍵減速
;定義8255的地址
PA8255 EQU 0200H
PB8255 EQU 0202H
PC8255 EQU 0204H
CON8255 EQU 0206H
;定義8253的部分地址
P8253T2 EQU 0404H
P8253CON EQU 0406H
STACK SEGMENT
STK DB 200 DUP(0)
TOP DW $-STACK
STACK ENDS
CODE SEGMENT
ASSUME CS:CODE,SS:STACK
START:
MOV DX,STACK
MOV SS,DX
MOV SP,TOP
;8255初始化
MOV AL,82H
MOV DX,CON8255
OUT DX,AL
MOV SI,0200H
MOV AL,0AH
MOV [SI],AL
MOV AL,7FH
BEGIN:
CALL DISPLAY
PUSH AX
MOV DX,PB8255
IN AL,DX
AND AL,02H
CMP AL,00H
JNZ NEXT
MOV AL,[SI]
DEC AL
CMP AL,0
JZ NEXT
MOV [SI],AL
NEXT:
MOV DX,PB8255
IN AL,DX
AND AL,04H
CMP AL,00H
JNZ NEXT1
MOV AL,[SI]
INC AL
CMP AL,14H
JZ NEXT1
MOV [SI],AL
NEXT1:
POP AX
JMP BEGIN
DISPLAY PROC
L1:
MOV DX,PA8255
OUT DX,AL
CALL DELAY
ROL AL,1
RET
DISPLAY ENDP
DELAY PROC
PUSH AX
MOV AL,90H ;1001 0000,8位計數器,方式0,BCD碼計數
MOV DX,P8253CON ;寫入工作方式控制字
OUT DX,AL
MOV SI,0200H
MOV AL,[SI] ;給T0賦初值
MOV DX,P8253T2
OUT DX,AL
L2:
MOV DX,PB8255
IN AL,DX
CMP AL,0FEH
JZ L2
POP AX
RET
DELAY ENDP
CODE ENDS
END START

復制代碼

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