motor.txt

这是用汇编写的步进电机控制程序

	          	ORG 0000H
        LJMP START  
        ORG 0023H
        LJMP SERVE
START:	mov TMOD,#20h ;T1: 工作模式2
	mov PCON,#80h ;SMOD=1
	mov TL1,#0FDH
	mov TH1,#0FDH ;初始化波特率9600
	mov SCON,#50h ;Standard UART settings
	SETB REN ;允许接收
	SETB TR1 ;T1开始工作
	setb ES  ;开串口中断
	setb EA
	setb p3.0
        LJMP ZHU
ZHU: 	CPL P3.0
	DJNZ R2,DO_WHAT1
	AJMP DIANJI2
DO_WHAT1:MOV A,#00H
LOOP01:	MOV DPTR,#TAB1
	MOVC A,@A+DPTR
	MOV P1,A
	lcall DY2MS
	INC A
	CJNE A,#4,LOOP01                  
DIANJI2:DJNZ R3,DO_WHAT2
	AJMP DIANJI3
DO_WHAT2:MOV A,#00H
LOOP02:	MOV DPTR,#TAB2
	MOVC A,@A+DPTR
	MOV P1,A
	lcall DY2MS
	INC A
	CJNE A,#4,LOOP02 
DIANJI3:DJNZ R4,DO_WHAT3
	AJMP DIANJI4
DO_WHAT3:MOV A,#00H
LOOP03:	MOV DPTR,#TAB1
	MOVC A,@A+DPTR
	MOV P2,A
	lcall DY2MS
	INC A
	CJNE A,#4,LOOP03 
DIANJI4:DJNZ R5,DO_WHAT4
	LJMP ZHU
DO_WHAT4:MOV A,#00H
LOOP04:	MOV DPTR,#TAB2
	MOVC A,@A+DPTR
	MOV P2,A
	lcall DY2MS
	INC A
	CJNE A,#4,LOOP04
	LJMP ZHU
SERVE:  CLR RI               ;中断程序
        PUSH ACC
        PUSH PSW
        CLR RS0
        SETB RS1
	MOV A,SBUF
	INC A
	MOV R2,A
RX_COMD1:JNB RI,RX_COMD1
        CLR RI
	MOV A,SBUF
	INC A
	MOV R3,A
RX_COMD2:JNB RI,RX_COMD2
        CLR RI
	MOV A,SBUF
	INC A
	MOV R4,A 
RX_COMD3:JNB RI,RX_COMD3
         CLR RI
	MOV A,SBUF
	INC A
	MOV R5,A
RETURN: SETB SM2
        POP PSW
        POP ACC
        RETI 	
TAB1: 	DB 03H,09H,0CH,06H
TAB2: 	DB 030H,090H,0C0H,060H
DY2MS:
MOV R7,#0100
loop10:MOV R6,#200
DJNZ R6,$
DJNZ R7,loop10
RET
	END