微原課設(shè)家用電熱淋浴器的設(shè)計(jì)-資料下載頁(yè)
2025-06-30 02:45本頁(yè)面
【正文】 5_C MOV AL,80H OUT DX, AL POP AX RET。LED顯示LED PROC NEAR MOV AL,0EH MOV DX,MY8255_A 。初始化A口 指定顯示管百位顯示 OUT DX,AL 。MOV AX,INIT_N MOV AX,INIT_N MOV BL,64H DIV BL MOV BH,AH 。保存余數(shù) MOV SI,OFFSET N_LED_CODE MOV AH,0H ADD SI,AX MOV AL,[SI] MOV DX,MY8255_B OUT DX,AL 。寫(xiě)B(tài)口 輸出百位 CALL DALLY1 MOV AL,0DH MOV DX,MY8255_A OUT DX,AL MOV AL,BH 。回復(fù)余數(shù) MOV AH,0H MOV BL,0AH DIV BL MOV BH, AH 。保存余數(shù) MOV SI,OFFSET N_LED_CODE MOV AH,0H ADD SI,AX 。計(jì)算偏移量 MOV AL,[SI] MOV DX,MY8255_B OUT DX,AL 。寫(xiě)B(tài)口 輸出十位 CALL DALLY1 MOV AL,0BH MOV DX,MY8255_A OUT DX,AL MOV SI,OFFSET NUM_LED_CODE MOV AL,BH MOV AH,0H ADD SI,AX MOV AL,[SI] MOV DX,MY8255_B OUT DX,AL 。輸出個(gè)位 CALL DALLY1 RETLED ENDP。延時(shí)子程序1DELAY PROC PUSH AX PUSH CX MOV CX,0ffFFH D11: MOV AX,0ffFH D12: DEC AX JNZ D12 LOOP D11 POP CX POP AXRETDELAY ENDP。延時(shí)子程序2DALLY1 PROC NEAR PUSH AX PUSH CX MOV CX,0fffFH D21: MOV AX,0FFH D22: DEC AX JNZ D22 LOOP D21 POP CX POP AXRETDALLY1 ENDP。延時(shí)子程序3DALLY2 PROC PUSH CX MOV CX,00FFHD31: MOV AX,00FFHD32: DEC AX JNZ D32 LOOP D31 POP CX RETDALLY2 ENDP。揚(yáng)聲器發(fā)聲BAOJING PROC PUSH AX PUSH BX PUSH CX PUSH DX MOV DX,MY8254_MODE 。初始化8254工作方式 MOV AL,36H 。定時(shí)器0、方式3 OUT DX,AL MOV DX,0FH MOV DX,0FH 。， = 0FE502H MOV AX,0E502H MOV BX,FREQ DIV BX 。取出頻率值計(jì)算計(jì)數(shù)初值，0F4240H / 輸出頻率 MOV DX,MY8254_COUNT0 OUT DX,AL 。裝入計(jì)數(shù)初值 MOV AL,AH OUT DX,AL MOV DL,TIME CALL DELAY MOV DX,MY8254_MODE 。退出時(shí)設(shè)置8254為方式2，OUT0置0 MOV AL,10H OUT DX,AL POP DX POP CX POP BX POP AX RETBAOJING ENDP SCAN PROC NEAR 。掃描是否有按鍵閉合子程序 MOV AL,07H MOV DX,MY8255_A 。將4列全選通，X1～X4置0 OUT DX,AL MOV DX,MY8255_C IN AL,DX 。讀Y1～Y4 NOT AL AND AL,0FH 。取出Y1～Y4的反值 RETSCAN ENDPCLEAR PROC NEAR 。清除數(shù)碼管顯示子程序 MOV DX,MY8255_B 。段位置0即可清除數(shù)碼管顯示 MOV AL,00H OUT DX,AL RETCLEAR ENDPCODE ENDS END START
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