求大神帮忙编写单片机控制步进电机C语言编程，图片如下，AT89C51单片机四相八拍，ULN2004驱动芯片

Question

控制步进电机实现正转、反转、加速、减速、停止。

Answer 1

#include "reg52.h"
//Motor
sbit A = P2^0; //定义管脚
sbit b = P2^1;
sbit C = P2^2;
sbit D = P2^3;

///////////////////////////////////////
//步进电机驱动
unsigned char MotorStep=0;
unsigned int MotorTimer = 0;
unsigned int MotorDelay,Speed=1,TIM,CT;

#define speed 8 // 调整速度 数值不要设的太低 低了会引起震动。

/*****************************************************
* 初始化马达 *
******************************************************/
void InitMotor()
{
A = 1;
b = 1;
C = 1;
D = 1;
}

void SetMotor()
{
// if(Speed == 0) return;

MotorDelay=Speed; //调整速度
switch(MotorStep)
{
case 0:
if(TIM) // A
{
A = 0; //0xf1
b = 1;
C = 1;
D = 1;
MotorStep = 1;
TIM=0;
}
break;

case 1: // AB
if(TIM)
{
A = 0; //0xf3
b = 0;
C = 1;
D = 1;
MotorStep = 2;
TIM=0;
}
break;

case 2: //B
if(TIM)
{

A = 1;
b = 0; //0xf2
C = 1;
D = 1;

MotorStep = 3;
TIM=0;
}
break;

case 3: //BC
if(TIM)
{
A = 1;
b = 0; //0xf6
C = 0;
D = 1;
MotorStep = 4;
TIM=0;
}
break;
case 4: //C
if(TIM)
{
A = 1;
b = 1; //0xf4
C = 0;
D = 1;
MotorStep = 5;
TIM=0;
}
break;
case 5: //CD
if(TIM)
{
A = 1;
b = 1; //0xfc
C = 0;
D = 0;
MotorStep = 6;
TIM=0;
}
break;
case 6: //D
if(TIM)
{
A = 1;
b = 1; //0xf8
C = 1;
D = 0;
MotorStep = 7;
TIM=0;
}
break;
case 7: //DA
if(TIM)
{
A = 0;
b = 1; //0xf9
C = 1;
D = 0;
MotorStep = 0;
TIM=0;
}
break;

}

}

void system_Ini()
{
TMOD|= 0x11;
TH0=0xDC; //11.0592M
TL0=0x00;
IE = 0x8A;
TR0 = 1;

}

main()
{ system_Ini();
InitMotor();
while(1)
{
SetMotor();

}

}

/************************************************
* *
* 定时中断延时 *
************************************************/
void Tzd(void) interrupt 1
{
TH0 = 0xfe; //11.0592
TL0 = 0x33;

if( CT++==speed)
{TIM=1;
CT=0;
}
}