微机原理实验报告(5)

MOV DX,ADDRESS_A MOV AL,SECOND_L OUT DX,AL

MOV DX,ADDRESS_A ;清零 MOV AL,CLEAR_1 OUT DX,AL

MOV DX,ADDRESS_B MOV AL,CLEAR_2

OUT DX,AL

XOR AX,AX

MOV AL,MINUTE ; MOV BL,10 DIV BL XOR BX,BX MOV BL,AL

MOV AL,LED_CODE+[BX] ; OUT DX,AL

MOV DX,ADDRESS_A MOV AL,MINUTE_H OUT DX,AL

MOV DX,ADDRESS_A ; MOV AL,CLEAR_1 OUT DX,AL

MOV DX,ADDRESS_B MOV AL,CLEAR_2

OUT DX,AL MOV BL,AH

MOV AL,LED_CODE+[BX] ; OUT DX,AL

MOV DX,ADDRESS_A MOV AL,MINUTE_L OUT DX,AL

MOV DX,ADDRESS_A ; MOV AL,CLEAR_1 OUT DX,AL

MOV DX,ADDRESS_B MOV AL,CLEAR_2

OUT DX,AL

XOR AX,AX ; MOV AL,O_CLOCK MOV BL,10 DIV BL XOR BX,BX MOV BL,AL

分钟显示高位 清零 低位 清零 时钟显示 20

MOV AL,LED_CODE+[BX] ;高位 OUT DX,AL

MOV DX,ADDRESS_A MOV AL,O_CLOCK_H OUT DX,AL

MOV DX,ADDRESS_A ;清零 MOV AL,CLEAR_1 OUT DX,AL

MOV DX,ADDRESS_B MOV AL,CLEAR_2

OUT DX,AL MOV BL,AH

MOV AL,LED_CODE+[BX] ; OUT DX,AL

MOV DX,ADDRESS_A MOV AL,O_CLOCK_L OUT DX,AL

MOV DX,ADDRESS_A ; MOV AL,CLEAR_1 OUT DX,AL

MOV DX,ADDRESS_B MOV AL,CLEAR_2

OUT DX,AL POP DX POP AX POP BX POPF RET

DISPLAY_TIME ENDP

ININT8255 FAR PROC ;8255 PUSH DX PUSH AX PUSHF

MOV DX,ADDRESS_CONTROL MOV AL,WORD_CONTROL8255 OUT DX,AL POPF POP AX POP DX RET

ININT8255 ENDP

ININT8253 FAR PROC ;8253 PUSH DX PUSH AX

低位 清零 芯片的初始化 芯片的初始化21

PUSHF

MOV DX,0406H MOV AL,34H OUT DX,AL MOV DX,0400H MOV AX,1000 OUT DX,AL MOV AL,AH OUT DX,AL POPF POP AX POP DX RET ININT8253 ENDP

INTERRUPT FAR PROC ; PUSHF PUSH AX

MOV AL,NUM_BUTTON CMP AL,0

JNBE NEXT4 MOV AL,TIME_COUNT INC AL

MOV TIME_COUNT,AL MOV AL,SECOND INC AL

MOV SECOND,AL CMP AL,60 JC NEXT1 MOV AL,0

MOV SECOND,AL MOV AL,MINUTE INC AL

MOV MINUTE,AL NEXT1: MOV AL,MINUTE CMP AL,60 JC NEXT4 MOV AL,0

MOV MINUTE,AL MOV AL,O_CLOCK INC AL

MOV O_CLOCK,AL NEXT2: MOV AL,O_CLOCK CMP AL,24 JC NEXT4

中断服务子程序22

MOV AL,0

MOV O_CLOCK,AL MOV AL,DAY INC AL

MOV DAY,AL NEXT3: MOV AL,DAY CMP AL,8 JC NEXT4 MOV AL,1 MOV DAY,AL NEXT4: POP AX POPF IRET

INTERRUPT ENDP DELAY10MS FAR PROC PUSHF PUSH CX PUSH BX MOV BX,10 LP1:MOV CX,10 LP2:LOOP LP2 DEC BX JNZ LP1 POP BX POP CX POPF RET

DELAY10MS ENDP CODE ENDS END

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