这是论坛上照学的一个单片机测直流电机转速的一个例子，为啥我仿真的时候电机不转

ID:746195 · 发表于 2020-5-10 21:02

图片1为原图，2为我照搬的图

附上代码-------

#include <reg51.h>
#define uchar unsigned char
#define uint unsigned int

sbit open = P2^0;
sbit close = P2^1;
sbit swap = P2^2;
sbit sub_speed = P2^3;
sbit add_speed = P2^4;

sbit PWM1 = P3^0;
sbit PWM2 = P3^1;
/************************液晶显示*************/
sbit E=P3^7;
sbit RW = P3^6;
sbit RS = P3^5;
sbit test = P3^4;

int time = 0;
int high = 20;
int period = 30;
int change = 0;
int flag = 0;
int num_medium = 0;
int num_display = 0;
int count_speed = 0;
uchar wword[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39};


/*******************延时t毫秒****************/
void delay(uchar t)
  {
      uint i;
      while(t)
      {
                  /*对于11.0592MHz时钟，延时1ms*/
               for(i=0;i<125;i++);
               t--;
            }
}

//写命令函数LCD
void wc51r(uchar j)
{
         RS=0;
               RW=0;
      P1=j;
               E=1;
               E=0;
               delay(3);
}

//写数据函数LCD
void wc51ddr(uchar j)
{

               RS=1;
               RW=0;
      P1=j;
               E=1;
               E=0;
               delay(2);
}

//初始化函数LCD
void init()
{
      wc51r(0x01);  //清屏
      wc51r(0x38);  //使用8位数据，显示两行，使用5*7的字型
      wc51r(0x0c);  //显示器件，光标开，字符不闪烁
      wc51r(0x06);  //字符不动，光标自动右移一格
}


/***********8T0中断服务程序************PWM波的生成**********/
void time0_int(void) interrupt 1
{

            time++;
            TH0 = 0xec;
            TL0 = 0x78;

            if(change == 0)
               {
                           PWM2 = 1;
                     if(time == high)
                           PWM1=0;
                     else if(time == period)
                     {
                              PWM1 = 1;
                              time = 0;
                        }

               }

            else
               {          PWM1 = 1;
                              if(time == high)
                                    PWM2=0;
                              else if(time == period)
                                 {
                                 PWM2 = 1;
                                          time = 0;
                           }
}

            }
/***************************************************************/
/****T1中断服务程序********单位时间（S）方波的个数*************/
void time1_int(void) interrupt 3
{
            count_speed++;
      if(count_speed == 20)
            {    count_speed = 0;
                        num_display = num_medium;
                        num_medium = 0;
               }

}
/***************************************************************/

/************************速度显示的数据处理*********************/
void datamade()
{
uint data MM,NN;
         wc51r(0xc2);
      wc51ddr('S');
               wc51ddr('p');
               wc51ddr('e');
               wc51ddr('e');
               wc51ddr('d');
      wc51ddr(0x3a);
               NN = num_display%100;
               MM = num_display/100;
                  wc51ddr(wword[MM]);

MM = NN/10;
            NN = NN%10;
wc51ddr(wword[MM]);
wc51ddr(wword[NN]);

}
/*****************************************************************/

/**********通过按键实现对电机开关、调速、转向的控制***************/
void motor_control()
{
               if(open == 1)
                              EA = 1;
               if(close == 1)
                              EA = 0;
               if(swap == 1)
                     {
                                    change = ~change;
                                    while(swap != 0)
                                       {}

                        }

                     if(sub_speed == 1)
                              {
                                       high++;
                                       if(high == 30)
                                             EA=0;
                                    while(sub_speed != 0)
                                                {}
                              }

                     if(add_speed == 1)
                              {
                                                high--;
                                             if(high == 5)
                                                high = 5;
                                    while(add_speed != 0)
                                                {}
                              }
      }

/******************************************************************/

/***************************主函数*********************************/
void main()
      {
                  P2 = 0x00;

                     ET0 = 1;
                     ET1 = 1;
                     TMOD = 0x11;
                     TH0 = 0xec;          //定时器T0设置参数
                     TL0 = 0x78;

                     TH1 = 0x3c;          //定时器T1设置参数
                     TL1 = 0xb0;
                     TR0 = 1;
                     TR1 = 1;

            init();             //液晶显示初始化程序

            while(1)
            {
                  wc51r(0x84);
                  wc51ddr('H');
                  wc51ddr('e');
                  wc51ddr('l');
                  wc51ddr('l');
                  wc51ddr('o');
                        if(test == 0)
                  num_medium++;
datamade();
motor_control();

         }
}