?。保畬?shí)驗(yàn)設(shè)計(jì)

定時(shí)器1于方式1,16位,10ms中斷一次

40H10ms計(jì)數(shù)單元

41H秒計(jì)數(shù)單元

42H分計(jì)數(shù)單元

43H時(shí)計(jì)數(shù)單元

定時(shí)方式1為10MS:THX=0ECH,TLX=78H

方式0為10MS: THX=63H,TLX=18H

步進(jìn)電機(jī)驅(qū)動(dòng)實(shí)驗(yàn)定時(shí)中斷程序

正轉(zhuǎn)后反轉(zhuǎn),顯示計(jì)數(shù)值

步進(jìn)電機(jī)按三相六拍的工作方式運(yùn)動(dòng)

X軸

CBA

P1.2 P1.1 P1.0

用鍵盤上方的發(fā)光二極管(3FH)對(duì)應(yīng)指示:

D2D1D0

正轉(zhuǎn):A-AB-B-BC-C-CA-A

反轉(zhuǎn):A-CA-C-BC-B-AB-A

２．參考程序

; 42H,41H為BCD碼計(jì)數(shù)單元

;內(nèi)存分配

TCTEREQU40H;10ms計(jì)數(shù)單元

CTCLEQU44H;進(jìn)給步數(shù)

CTCHEQU45H;最大9999步

STATEQU52H

SMOUTEQU55H

;位地址,工作標(biāo)志

XPEQU02H;X軸正反轉(zhuǎn)

XWEQU04H;工作標(biāo)志

;

DISPEQU0DE00H;顯示子程序入口

;

ORG0000H

START:AJMPMAIN

;

ORG000BH;定時(shí)器0中斷服

AJMPT0INT;務(wù)程序入口

;

ORG0030H

MAIN:MOVR0,#39H ;顯示緩沖區(qū)初始化

MAIN_0: MOV@R0,#0

INCR0

CJNER0,#44H,MAIN_0

MOVSTAT,#01

MOVSMOUT,#01H

MOVCTCL,#50H;150步

MOVCTCH,#01H

SETBXW

CLRXP

MOVTMOD,#01H

MOVIE,#10000010B

MOVTH0,#0ECH;10ms:EC78H

MOVTL0,#78H

SETBTR0

MAIN_1: JNBXW,MAIN_2

ACALLCONT;主程序循環(huán)

SJMPMAIN_1

MAIN_2: CLRTR0;關(guān)定時(shí)器

MAIN_3: LCALLDISP

SJMPMAIN_3

;

CONT:MOV3FH,SMOUT

LCALLDISP;控制程序

;MOVP1,SMOUT

RET

;

;定時(shí)器0中斷服務(wù)程序

T0INT:MOVTH0,#0ECH

MOVTL0,#78H

PUSHACC;保護(hù)現(xiàn)場(chǎng)

PUSHPSW

PUSH01H

INCTCTER

MOVA,TCTER

CJNEA,#50,T0INTR

MOVTCTER,#0

ACALLXPD0

ACALLCOUNT

T0INTR: POP01H

POPPSW;恢復(fù)現(xiàn)場(chǎng)

POPACC

RETI

COUNT:JBXP,COUNT0

MOVA,41H;個(gè)十單元

INCA

DAA

MOV41H,A

JNZCOUNT1

CLRC

MOVA,42H;百千單元

INCA

DAA

MOV42H,A

SJMPCOUNT1

COUNT0: MOVA,41H;個(gè)十單元

ADDA,#99H

DAA

MOV41H,A

CJNEA,#99H,COUNT2

MOVA,42H;百千單元

ADDA,#99H

DAA

MOV42H,A

SJMPCOUNT2

COUNT1: MOVA,42H

XRLA,CTCH

JNZTINT0

MOVA,41H

XRLA,CTCL

JNZTINT0

SETBXP

SJMPTINT0

COUNT2: MOVA,42H

JNZTINT0

MOVA,41H

JNZTINT0

CLRXW

;

TINT0:MOVA,41H;第一拆字

ANLA,#0FH

MOV39H,A

MOVA,41H

ANLA,#0F0H

SWAPA

MOV3AH,A

MOVA,42H;第二拆字

ANLA,#0FH

MOV3BH,A

MOVA,42H

ANLA,#0F0H

SWAPA

MOV3CH,A

MOV3DH,#10H;空格

JBXP,TINT1

MOV3EH,#0AH;正轉(zhuǎn)

RET

TINT1:MOV3EH,#0BH;反轉(zhuǎn)

RET

;步進(jìn)電機(jī)驅(qū)動(dòng)處理

XPD0:MOVR1,#STAT

JBXP,XPD1

INC@R1;正轉(zhuǎn)

CJNE@R1,#07H,XPD2

MOV@R1,#1

SJMPXPD2

XPD1:DEC@R1;反轉(zhuǎn)

CJNE@R1,#00H,XPD2

MOV@R1,#06

XPD2:MOVA,@R1

ADDA,#2

MOVCA,@A+PC

MOVSMOUT,A

RET

SM_TAB: DB03H,01H,05H

DB04H,06H,02H