51 SCM drive stepping motor circuits and program design

Here to introduce with 51 SCM drive stepping motor of the method.
This KuanBu into motor driving voltage of the 12 V, step Angle was 7.5 degrees. A circle 360 degrees, need 48 pulse finish!
http://www.siliconray.com/thumb-usb-stc-8051-mcu-programmer-1.html

The stepping motor has six of the lead, rankings are as follows: 1: red, 2: red, 3: orange, 4: brown, 5: yellow, 6: black.
The driver of the method ULN2003 51 driver.

ULN2003 driver directly in the single-chip microcomputer system 5 V voltage, may torque is not very big, you can increase by driving voltage to 12 V.

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; * * * * * * * * * * * * * * * * * * * * * * * * * * * * the step motor drive * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

ORG 0000H

LJMP MAIN

ORG 0100H

MAIN:

MOV R3,#144   正转 3 圈共 144 脉冲

START:

MOV R0,#00H

START1:

MOV P2,#00H

MOV A,R0

MOV DPTR,#TABLE

MOVC A,@A+DPTR

JZ START   对 A 的判断,当 A = 0 时则转到 START

MOV P2,A

LCALL DELAY

INC R0

DJNZ R3,START1

MOV P2,#00H

LCALL DELAY1

;-----------------------------反转------------------------

MOV R3,#144    反转一圈共 144 个脉冲

START2:

MOV P2,#00H

MOV R0,#05

START3:

MOV A,R0

MOV DPTR,#TABLE

MOVC A,@A+DPTR

JZ START2

MOV P2,A

CALL DELAY

INC R0

DJNZ R3,START3

MOV P2,#00H

LCALL DELAY1

LJMP MAIN

DELAY: MOV R7,#40 步进电机的转速

M3: MOV R6,#248

DJNZ R6,$

DJNZ R7,M3

RET

DELAY1:            MOV   R4,#20    2S 延时子程序

DEL2:              MOV   R3,#200

DEL3:              MOV   R2,#250

                   DJNZ  R2,$

                   DJNZ  R3,DEL3

                   DJNZ  R4,DEL2

                   RET

TABLE:

DB 30H,60H,0C0H,90H  正转表

DB 00  正转结束

DB 30H,90H,0C0H,60H  反转表

DB 00  反转结束

END