1、Z8279 EQU 239HD8279 EQU 238HLEDMOD EQU 00 ;左邊輸入,八位顯示外部譯碼八位顯示LEDFEQ EQU 38H ;掃描頻率CODE SEGMENTASSUME CS:CODE,DS:CODESTART: ;初始化PUSH CSPOP DSMOV DX,Z8279MOV AL,LEDMODOUT DX,ALMOV AL,LEDFEQOUT DX,ALMOV DX,D8279MOV AL,7FHOUT DX,ALMOV DX,D8279MOV AL,7FHOUT DX,ALMOV DX,D8279MOV AL,7DHOUT DX,ALMOV DX,D8279M

2、OV AL,7FHOUT DX,ALMOV DX,D8279MOV AL,70HOUT DX,ALMOV DX,D8279MOV AL,5EHOUT DX,ALMOV DX,D8279MOV AL,79HOUT DX,ALMOV DX,D8279MOV AL,77HOUT DX,AL ;以上為寫(AEDK8688NOPMOV DX,Z8279MOV AL,0C2HOUT DX,AL ;置空FIFO寄存器W AIIT: NOPIN AL,DXMOV BL,ALAND AL,80HCMP AL,80HJE W AIIT ;FIFO正在清除期間則跳轉等待MOV AL,BLAND AL,0FHCMP

3、AL,00HJE W AIIT ;無鍵按下則等待MOV AL,40H ;寫讀FIFO RAM命令字OUT DX,ALMOV DX,D8279 ;讀入FIFO RAM內容IN AL,DXNOPCMP AL,15H ;是結束符則結束JE FININOP ;查表,將鍵碼放入AL中LEA BX,LEDXLA TMOV DX,D8279 ;將AL中內容寫到數碼管上OUT DX,ALMOV DX,Z8279 ;清FIFO RAM寄存器MOV AL,0C2HOUT DX,ALJMP W AIIT ;等待下一次鍵輸入FINI: MOV DX,Z8279 ;清FIFO寄存器并關蜂鳴器MOV AL,0C2HOUT

4、 DX,ALJMP $LED DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH,77H,7CH,39H DB 5EH,79H,71HCODE ENDSEND STARTCSAD EQU 208HZ8279 EQU 239HD8279 EQU 238HZ8255 EQU 21EHZ8255A EQU 218HZ8255C EQU 21CHLEDMOD EQU 00 ;左邊輸入,八位顯示外部譯碼八位顯示LEDFEQ EQU 38H ;掃描頻率LEDCLS EQU 0C1H;清除顯示RAMREADKB EQU 40HCOUNT EQU 8CODE SEGMENTA

5、SSUME CS:CODE,DS:CODESTART:PUSH CSPOP DS;指定SI到8100:1000,存放臨時溫度值MOV SI,1000HMOV DX,Z8255 ;設置A口為輸入,C口為輸出MOV AL,92HOUT DX,ALMOV DX,Z8255CMOV AL,0FFHOUT DX,ALCALL DELAYCALL DELAYMOV DX,Z8279 ;初始化8279MOV AL,LEDMODOUT DX,ALMOV AL,LEDFEQOUT DX,ALMOV AL,LEDCLSOUT DX,ALMOV AL,0MOV SI,ALBEGIN:MOV BX,0MOV CL,C

6、OUNTMOV CH,0BB:MOV DX,CSAD ;采樣A/D值MOV AX,0OUT DX,ALCALL DELAYIN AL,DXADC BX,AX ;求平均值LOOP BBMOV AX,BXRCR AX,1RCR AX,1RCR AX,1CALL CHANGTOBCD ;轉化為十進制的溫度值PUSH AXCALL DISCALL SET_TPOP AXMOV BL,SICMP AL,BLJA DOWN ;輸入值與實際值比較,小于則加熱,大于則停止加熱MOV AL,0HJMP UPDOWN: MOV AL,40HUP: MOV DX,Z8255COUT DX,ALJMP BEGINSE

7、T_T PROC NEARCALL READ_KEYCMP AL,0JNZ THE_KEYJMP IN_ENDTHE_KEY:MOV AL,BLCMP AL,0DH ;IF BEING 'D'KEY, START TO SETJZ ST_KJMP IN_ENDST_K:CALL READ_KEYCMP AL,0FFHJNZ ST_K%H:MOV AL,BLMOV CH,BLCMP AL,0AHJNC ST_KCALL DIS_CHAR1ST_L:CALL READ_KEYCMP AL,0FFHJNZ ST_L%L:MOV AL,BLMOV CL,BLCMP AL,0AHJNC

8、ST_LCALL DIS_CHAR2RD_E:CALL READ_KEYCMP AL,0FFHJNZ RD_EMOV AL,BLCMP AL,0EHJNZ RD_EEND_ST:MOV AL,CHMOV BL,CLMOV CL,4HROR AL,CLADD AL,BLMOV SI,ALIN_END:RETSET_T ENDPREAD_KEY PROC NEARMOV DX,Z8279IN AL,DX ;讀8279狀態AND AL,07H ;屏蔽D7-D3JNZ GETV AL ;判斷是否有鍵輸入MOV AL,0H ;置標志(無鍵輸入JMP NKBHITGETV AL: MOV AL,READK

9、B ;讀FIFO RAM 命令OUT DX,ALMOV DX,D8279IN AL,DX ;讀鍵AND AL,3FH ;屏蔽SHIFT 和CTRL 鍵MOV BL,AL ;置返回鍵值MOV AL,0FFH ;置標志(有鍵輸入 NKBHIT:RETREAD_KEY ENDPPROC NEAR PUSH CX MOV CX,0F00H LOOP $ POP CX RET DELAY ENDP CHANGTOBCD PROC NEAR MOV BL,3 MUL BL MOV BL,10 DIV BL AAM MOV BL,AL MOV AL,AH MOV CL,04H ROR AL,CL XOR A

10、L,BL RET CHANGTOBCD ENDP DIS_CHAR1 PROC NEAR PUSH AX MOV DX,Z8279 MOV AL,91H OUT DX,AL POP AX LEA BX,LED XLAT MOV DX,D8279 OUT DX,AL RET DIS_CHAR1 ENDP DIS_CHAR2 PROC NEAR PUSH AX MOV DX,Z8279 MOV AL,90H OUT DX,AL POP AX LEA BX,LED XLAT MOV DX,D8279 OUT DX,AL RET DELAY ;BCD 碼轉換子程序 ;非壓縮 BCD 碼乘法調整指令 DIS_CHAR2 ENDP DIS PROC NEAR ;顯示子程序 MOV BL,AL ;將 AL 中內容寫到數碼管上 AND AL,0FH PUSH AX MOV DX,Z8279 MOV AL,96H OUT DX,AL POP AX PUSH BX LEA BX,LED XLAT POP BX MOV DX,D8279 OUT DX,AL CALL DELAY MOV AL,BL MOV CL,04H ROR