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MAIN: CLR P2.5 CLR P3.7

;ÇåA/DÆô¶¯Ðźź͵ØÖ·Ëø´æÐźÅ

;ÇåA/DÊä³öÔÊÐí¿ØÖƶË

TE:LCALL KEY ; µ÷ÓüüÅÌɨÃè×Ó³ÌÐò LCALL ADC MOV 80H,A LCALL LED

LJMP TE

¿ªÊ¼

³õʼ»¯ ; µ÷ÓÃA/Dת»»×Ó³ÌÐò

;½«A/Dת»»½á¹û´æÓÚ80H

;µ÷ÓÃÏÔʾ×Ó³ÌÐò

N °´¼üɨÃ裬ÅжÏÓÐÎÞ¼ü°´ÏÂ

Y A/Dת»» LEDÏÔʾ Ö÷³ÌÐòÁ÷³Ìͼ

5.2 ¼üÅÌɨÃè×Ó³ÌÐòÉè¼Æ

²ÉÓÃÐÐɨÃè·¨¡£Ê×ÏÈÅбðÓÐÎÞ¼ü°´Ï£¬Óɵ¥Æ¬»úI/O¿ÚÏò½¨ÅÊÊä³öȫɨÃè×Ö£¬È»ºó¶ÁÈëÁÐÏß״̬À´Åжϡ£ÅжϼüÅÌÖÐÄÄÒ»¸ö¼ü±»°´ÏÂÊÇͨ=ͨ¹ý½«ÐÐÏßÖðÐÐÖõ͵çƽºó£¬¼ì²éÁÐÊä

Èë״̬ʵÏֵġ£Èç¹ûȫΪ1£¬ÔòËù°´Ïµļü²»ÔÚ´ËÐУ»Èç¹û²»È«Îª1£¬ÔòËù°´Ïµļü±ØÔÚ´ËÐУ¬¶øÇÒÊÇÔÚÓëÁãµçƽÁÐÏßÏཻµÄ½»µãÉϵÄÄǸö¼ü¡£

KEY: ;¼üÅÌɨÃè×Ó³ÌÐò LCALL KS ;ÅжÏÓÐÎÞ¼ü°´Ï JZ KND LCALL T10MS LCALL KS JZ KND

MOV R2,#0FEH MOV R4,#00H LK1:

MOV P3,R2 MOV A,P3 JB ACC.3,ONE MOV A,#00H LJMP KP ONE:

JB ACC.2,NEXT MOV A,#02H KP:

ADD A,R4 PUSH ACC

LK:LCALL KS JNZ LK POP ACC MOV R3,A KND:RET

NEXT:INC R4 MOV A,R2 JNB ACC.1,KND RL A MOV R2,A AJMP LK1

KS:MOV P3,#0FCH MOV A,P3 CPL A

ANL A,#0CH RET

;ÎÞ¼ü°´Ï£¬Í˳öɨÃè ;Óмü°´Ï£¬ÑÓʱȥ¶¶¶¯ ;Ê×ÐÐɨÃè×ÓËÍR2 ;Ê×ÐкÅ#00HËÍÈëR4 ;Ê×ÐÐɨÃè×ÖËÍP3¿Ú ;0ÁÐÎÞ¼ü°´Ï£¬×ª1ÁÐ ;0ÁÐÓмü°´Ï£¬¸ÃÁÐÊ׺Å#00HËÍA ;תÇó¼üºÅ ;1ÁÐÎÞ¼ü°´Ï£¬×ªÏÂÐÐ ;1ÁÐÓмü°´Ï£¬¸ÃÁÐÊ׺Å#02HËÍA ;Çó¼üºÅ ;¼üºÅ½øÕ»±£»¤ ;µÈ´ý¼üÊÍ·Å ;δÊÍ·Å£¬µÈ´ý ;¼üÊÍ·Å£¬£¬¼üºÅËÍA ;¼üºÅËÍÈëR3±£´æ ;ÐкżÓ1 ;ÅжÏÁ½ÐÐɨÃèÍêÁËÂð ;ɨÃèÍê³É£¬Í˳ö ;δɨÃèÍ꣬ɨÃè×Ö×óÒÆһλ ;ɨÃè×ÖÈëR2 ;תɨÏÂÒ»ÐÐ ;ȫɨÃè×ÖËÍP3¿Ú ;¶ÁÈëP3¿Ú״̬ ;È¡ÕýÂß¼­£¬¸ßµçƽ±íʾÓмü°´ÏÂ

T10MS:MOV R7,#10H TS1:MOV R6,#0FFH TS2:DJNZ R6,TS2 DJNZ R7,TS1 RET

;ÑÓʱ10ms×Ó³ÌÐò

5.3 A/Dת»»×ÓÐòÉè¼Æ

ADC: ;A/Dת»»³ÌÐò MOV A,R3 ;¼üºÅËÍA

JB ACC.0,IN4 ;ÈôA×îµÍλΪ1£¬Ñ¡ÔñͨµÀ4£¬·ñÔòΪͨµÀ3 CLR P3.6 ;ͨµÀ3 SETB P3.5 SETB P3.4

SETB P2.5 ;Æô¶¯A/Dת»» NOP NOP CLR P2.5 NOP NOP

HERE:JNB P2.4,HERE ;ÅжÏת»»Íê³É·ñ SETB P3.7 ;ת»»Íê³É£¬ËͳöÊý¾Ý NOP NOP

MOV A,P1 ;½«×ª»»Êý¾ÝËÍÈëA CLR P3.7 RET IN4: ;ͨµÀ4 SETB P3.6 CLR P3.5 CLR P3.4 SETB P2.5 NOP NOP CLR P2.5 NOP NOP

AJMP HERE

5.3 ÖÐÖµÂ˲¨×Ó³ÌÐòµÄÉè¼Æ

FILT1:

MOV A,40H ;40H<41HÂ𣿠CLR C

SUBB A,41H JC FILT1

MOV A,40H ;40H>41Hʱ£¬½»»»40HºÍ41H XCH A,41H MOV 41H,A FILT2:

MOV A,41H ;41H<42HÂ𣿠CLR C

SUBB A,42H

JC FILE3 ;41H<42Hʱ£¬ÅÅÐò½áÊø

MOV A,42H ;41H>42Hʱ£¬½»»»41HºÍ42H XCH A,41H

XCH A,42H ;41H>40HÂ𣿠CLR C

SUBB A,41H

JNC FILT3 ;41H>40Hʱ£¬ÅÅÐò½áÊø

MOV A,40H ;41H<40Hʱ£¬ÒÔ40HΪÖÐÖµ MOV 41H,A FILT3:

RET ;ÖÐÖµÔÚ41HÖÐ

5.4 LEDÏÔʾ×Ó³ÌÐòµÄÉè¼Æ

LED:MOV A,80H ;LEDÏÔʾ×Ó³ÌÐò MOV B,#05H MUL AB

MOV 31H,B ;³Ë5È¡¸ß°Ë룬ËÍÈëLEDµÚ¶þλÏÔʾ MOV B,#0AH

MUL AB

MOV 32H,B ;ÓàÊý³Ë10È¡¸ß°ËλËÍÈëLEDµÚÈýλÏÔʾ

XIANSHI:

MOV DPTR,#TAB MOV A,R3