基于AT89S51的两相步进电机的运动控制
一、控制要求：（1）能通过按键控制步进电机的正反转，并在数码管上表示出来；（2）步进电机的运动速度分为4级，能通过按键控制加减速，并在数码管上表示出来；（3）能通过微动开关KW11控制电机正反转的急停；（4）急停后能通过按键使电机向反向运动。二、控制电路原理图：
VCC50VVCC50VVCC50V123ZS45MOSI6MISO7SCK8RST9NS10SN11INT012INT11314HX15XC16CX17XTAL218XTAL119GND20STEPDIRP10VCCP11P00P12P01P13P02P14P03P15P04P16P05P17P06RSTP07P30EAVPPP31ALEPROGP32PSENP33P27P34P26P35P25P36P24P37P23XTAL2P22XTAL1P21GNDP204039383736353433323130292827262524232221VCC50VP00P01P02P03P04P05P06P07EAVCC50VVCC50VVCC50V
P0610P05GND9P008P0176
P2610P25
U1
AT89S51
16151413121110
9
gGNDf
INT1
INT0
agdb
D1LG5011AG
gGNDf
ab
agdbcdp
fe
NS
SN
f
RST
HX
P00P01P02P03P04P05P06P07
12345678
e
cdp
eGNDd
eGNDd
S5SWPB
S4SWPB
S3SWPB
S2SWPB
S1SWPB

C310uF50V
P27P26P25P24P23P22P21P20
dcp
12345
VCC50V
换向
顺时针转动急停后逆时针，转动急停后，恢复逆时针转动恢复顺时针转动
减速
加速
上电复位
单片机芯片
显示转动方向
P04P03GNDP02P07
显示转速
VCC50VJ2321VCC50VEAGNDJ5654321VCC24VGNDAABBC1XTAL222pFM1MOTORSTEPPERR8330X112MHzAAJ34321J421JKKGVCC50VDIRVCC50VSTEPJKKGJ6R71KVCC50V321XCGNDCX22pFD3LEDC2
控制板外接模块
B
XTAL1
SW12SW11SW10
SW9
时钟电路
J1654321GNDVCC50VMOSIMISOSCKRST
备注：
VCC50V、VCC24V、GND均接至开关电源盒NED100D；
烧录程序
ENENDIRDIRSTEPSTEPSW8SW7SW6SW5SW4SW3SW2SW1BBAAVGNDV
两步电相进机
ZS
S3
B
GNDP22P27
P24P23
12345
dcp
S4
顺针停时急
XC
ab
R610K
R510K
R410K
R310K
R210K
R110K
RP11K
9876
D2LG5011AG
GNDP20P21
逆针停时急
CXKW11
KW11
微开动关
DOWNLOAD
HDBASD422R
电驱器机动
驱动器的输入电路采用共阳极接法。
图（1）
三、控制程序：i
cludereg51hi
cludestdiohdefi
eui
tu
sig
edi
tdefi
eucharu
sig
edchardefi
eT115defi
eT210defi
eT38defi
eT45sbitsbitsbitsbitsbits1P32加速按钮s2P33减速按钮hxP35换向开关STEPP10脉冲信号DIRP11方向信号
fsbitsbitsbitsbitsbit
LEDP13xcP36cxP37NSP30SNP31
指示灯正向行程反向行程逆时针急停r