step_motor.txt

电机转速控制, 通过开关可以控制电机的速度和设定电机的速度 然后再显示出来

#include <AT89X51.h> 

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，数值越大速度越慢，最小值为1，速度最快
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) 
{
  count = 0;
  step_index = 0;
  spcount = 0;
  stop_flag = 0;

  P1_0 = 0;
  P1_1 = 0;
  P1_2 = 0;
  P1_3 = 0;

  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;

  speedlevel = 2;
  delay(10000);
  speedlevel = 1;
  do{
    speedlevel = 2;
    delay(10000);
    speedlevel = 1;
    delay(10000);
    stop_flag=1;
    delay(10000);
    stop_flag=0;
  }while(1);

} 

//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++;

  spcount--;
  if(spcount<=0)
  {
    spcount = speedlevel;
    gorun();
  }

}

void delay(unsigned int endcount)
{
  count=0;
  do{}while(count<endcount);
}

void gorun()
{
  if (stop_flag==1)
  {
    P1_0 = 0;
    P1_1 = 0;
    P1_2 = 0;
    P1_3 = 0;
    return;
  }

  switch(step_index)
  {
  case 0: //0
    P1_0 = 1;
    P1_1 = 0;
    P1_2 = 0;
    P1_3 = 0;
    break;
  case 1: //0、1
    P1_0 = 1;
    P1_1 = 1;
    P1_2 = 0;
    P1_3 = 0;
    break;
  case 2: //1
    P1_0 = 0;
    P1_1 = 1;
    P1_2 = 0;
    P1_3 = 0;
    break;
  case 3: //1、2
    P1_0 = 0;
    P1_1 = 1;
    P1_2 = 1;
    P1_3 = 0;
    break;
  case 4:  //2
    P1_0 = 0;
    P1_1 = 0;
    P1_2 = 1;
    P1_3 = 0;
    break;
  case 5: //2、3
    P1_0 = 0;
    P1_1 = 0;
    P1_2 = 1;
    P1_3 = 1;
    break;
  case 6: //3
    P1_0 = 0;
    P1_1 = 0;
    P1_2 = 0;
    P1_3 = 1;
    break;
  case 7: //3、0
    P1_0 = 1;
    P1_1 = 0;
    P1_2 = 0;
    P1_3 = 1;
  }

  if (turn==0)
  {
    step_index++;
    if (step_index>7)
      step_index=0;
  }
  else
  {
    step_index--;
    if (step_index<0)
      step_index=7;
  }
    
}