正转一圈 后反转一圈.txt

MCU为89s52功率放大器为L298N控制步进电机 正转一周反转一周循环

#include <reg51.h> 
sbit A=P1^4 ;
sbit B=P1^5 ;
sbit C=P1^6; 
sbit D=P1^7 ;
static unsigned int count;  //计数
static int step_index;  //步进索引数，值为0－7
static bit turn;  //步进电机转动方向
static bit stop_flag;  //步进电机停止标志
static int speedlevel; //步进电机转速参数，数值越小速度越快，最小值为1，速度最慢
static int spcount;    //步进电机转速参数计数
void delay(unsigned int endcount);  //延时函数，延时为endcount*0.5毫秒
void gorun();          //步进电机控制步进函数

void main(void) 
{
  EA = 1;             //允许CPU中断 
  TMOD = 0x11; //设定时器0和1为16位模式1 
  ET0 = 1;           //定时器0中断允许 

  TH0 = 0xFE;
  TL0 = 0x0C;   //设定时每隔0.5ms中断一次
  TR0 = 1;         //开始计数
  turn = 0;
	do{turn = 0;
    speedlevel =4;
    delay(10000);  //以speedlevel = 4的速度转2000*0.5MS=1S
    speedlevel =4;
    delay(10000);  //以speedlevel = 4的速度转2000*0.5MS=1S
    //stop_flag=1;
    delay(600);//停止，2000*0.5MS=3S
    stop_flag=0;
    turn = 1;
	 speedlevel =4;
    delay(10000);  //以speedlevel = 4的速度转2000*0.5MS=1S
    speedlevel =4;
    delay(10000);  //以speedlevel = 4的速度转2000*0.5MS=1S
    stop_flag=1;
    delay(600);//停止，2000*0.5MS=3S
    stop_flag=0;
	}while(turn);
} 
//定时器0中断处理 
void timeint(void) interrupt 1 
{ 

  TH0=0xFE;
  TL0=0x0C; //设定时每隔0.5ms中断一次
  count++; 	//计数
  spcount--;	//步进电机转速参数计数
  if(spcount<=0)
  {
   spcount = speedlevel;
   gorun();
  }
}
void delay(unsigned int endcount)
{
  count=0;
  do{}while(count<endcount);
}

void gorun()
{
  if (stop_flag==1)
  {
    A = 0;
    B = 0;
    C = 0;
    D = 0;
    return;
  }
  switch(step_index)
  {
  case 7: //0
    A = 1;
    B = 0;
    C = 0;
    D = 0;
    break;
  case 6: //0、1
    A = 1;
    B = 0;
    C = 0;
    D = 1;
    break;
  case 5: //1
    A = 0;
    B = 0;
    C = 0;
    D = 1;
    break;
  case 4: //1、2
    A = 0;
    B = 0;
    C = 1;
    D = 0;
    break;
  case 3:  //2
    A = 0;
    B = 0;
    C = 1;
    D = 1;
    break;
  case 2: //2、3
    A = 0;
    B = 1;
    C = 1;
    D = 0;
    break;
  case 1: //3
    A = 0;
    B = 1;
    C = 0;
    D = 0;
    break;
  case 0: //3、0
    A = 1;
    B = 1;
    C = 0;
    D = 0;
  }
 if (turn==0)
  {
    step_index++;
    if (step_index>7)
      step_index=0;
  }
 else
  {
    step_index--;
    if (step_index<0)
      step_index=7;
  }
}