微机原理课程设计程序

1、Z8279 EQU 239HD8279 EQU 238HLEDMOD EQU 00 ;左边输入,八位显示外部译码八位显示LEDFEQ EQU 38H ;扫描频率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 ;以上为写(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正在清除期间则跳转等待MOV AL,BLAND AL,0FHCMP

3、AL,00HJE W AIIT ;无键按下则等待MOV AL,40H ;写读FIFO RAM命令字OUT DX,ALMOV DX,D8279 ;读入FIFO RAM内容IN AL,DXNOPCMP AL,15H ;是结束符则结束JE FININOP ;查表,将键码放入AL中LEA BX,LEDXLA TMOV DX,D8279 ;将AL中内容写到数码管上OUT DX,ALMOV DX,Z8279 ;清FIFO RAM寄存器MOV AL,0C2HOUT DX,ALJMP W AIIT ;等待下一次键输入FINI: MOV DX,Z8279 ;清FIFO寄存器并关蜂鸣器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 ;左边输入,八位显示外部译码八位显示LEDFEQ EQU 38H ;扫描频率LEDCLS EQU 0C1H;清除显示RAMREADKB EQU 40HCOUNT EQU 8CODE SEGMENTA

5、SSUME CS:CODE,DS:CODESTART:PUSH CSPOP DS;指定SI到8100:1000,存放临时温度值MOV SI,1000HMOV DX,Z8255 ;设置A口为输入,C口为输出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 ;采样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 ;转化为十进制的温度值PUSH AXCALL DISCALL SET_TPOP AXMOV BL,SICMP AL,BLJA DOWN ;输入值与实际值比较,小于则加热,大于则停止加热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 ;读8279状态AND AL,07H ;屏蔽D7-D3JNZ GETV AL ;判断是否有键输入MOV AL,0H ;置标志(无键输入JMP NKBHITGETV AL: MOV AL,READK

9、B ;读FIFO RAM 命令OUT DX,ALMOV DX,D8279IN AL,DX ;读键AND AL,3FH ;屏蔽SHIFT 和CTRL 键MOV BL,AL ;置返回键值MOV AL,0FFH ;置标志(有键输入 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 码转换子程序 ;非压缩 BCD 码乘法调整指令 DIS_CHAR2 ENDP DIS PROC NEAR ;显示子程序 MOV BL,AL ;将 AL 中内容写到数码管上 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