怎么通过按键控制步进电机的转动还是停止？

jf_63280182

这个是·我的： #include "reg52.h" typedef unsigned int u16; typedef unsigned char u8; sbit IN1_A=P1^0; sbit IN2_B=P1^1; sbit IN3_C=P1^2; sbit IN4_D=P1^3; sbit LED1=P2^0; sbit BEEP=P2^5; sbit KEY1=P3^1; sbit KEY2=P3^0; sbit KEY3=P3^2; sbit KEY4=P3^3; #define KEY1_PRESS 1 #define KEY2_PRESS 2 #define KEY3_PRESS 3 #define KEY4_PRESS 4 #define KEY_UNPRESS 0 #define STEPMOTOR_MAXSPEED 1 #define STEPMOTOR_MINSPEED 5 void delay_10us(u16 ten_us) { while(ten_us--); } void delay_ms(u16 ms) { u16 i,j; for(i=ms;i>0;i--) for(j=110;j>0;j--); } void beep_alarm(u16 time,u16 fre); #endif void beep_alarm(u16 time,u16 fre) { while(time--) { BEEP=!BEEP; delay_10us(fre); } } void step_motor_28BYJ48_send_pulse(u8 step,u8 dir) { u8 temp=step; if(dir==0) //如果为逆时针旋转 temp=7-step;//调换节拍信号 switch(temp)//8个节拍控制：A->AB->B->BC->C->CD->D->DA { case 0: IN1_A=1;IN2_B=0;IN3_C=0;IN4_D=0;break; case 1: IN1_A=1;IN2_B=1;IN3_C=0;IN4_D=0;break; case 2: IN1_A=0;IN2_B=1;IN3_C=0;IN4_D=0;break; case 3: IN1_A=0;IN2_B=1;IN3_C=1;IN4_D=0;break; case 4: IN1_A=0;IN2_B=0;IN3_C=1;IN4_D=0;break; case 5: IN1_A=0;IN2_B=0;IN3_C=1;IN4_D=1;break; case 6: IN1_A=0;IN2_B=0;IN3_C=0;IN4_D=1;break; case 7: IN1_A=1;IN2_B=0;IN3_C=0;IN4_D=1;break; default: IN1_A=0;IN2_B=0;IN3_C=0;IN4_D=0;break;//停止相序 } } u8 key_scan(u8 mode) { static u8 key=1; if(mode)key=1;//连续扫描按键 if(key==1&&(KEY1==0||KEY2==0||KEY3==0||KEY4==0))//任意按键按下 { delay_10us(1000);//消抖 key=0; if(KEY1==0) return KEY1_PRESS; else if(KEY2==0) return KEY2_PRESS; else if(KEY3==0) return KEY3_PRESS; else if(KEY4==0) return KEY4_PRESS; } else if(KEY1==1&&KEY2==1&&KEY3==1&&KEY4==1) //无按键按下 { key=1; } return KEY_UNPRESS; } void main() { u8 key=0; u8 dir=0;//默认逆时针方向 u8 speed=STEPMOTOR_MAXSPEED;//默认最大速度旋转 u8 step=0; u8 start=0; u8 KEY4_start; u8 flag; while(1) { key=key_scan(0); if(key==KEY1_PRESS) { beep_alarm(750,100); beep_alarm(2000,50); beep_alarm(1000,70); } else if(key==KEY2_PRESS) { if(speed>STEPMOTOR_MAXSPEED) speed-=1; } else if(key==KEY3_PRESS) { if(speed<STEPMOTOR_MINSPEED) speed+=1; } else if(key==KEY4_PRESS) { beep_alarm(750,100); beep_alarm(2000,50); beep_alarm(1000,70); while(!KEY4_start); } step_motor_28BYJ48_send_pulse(step++,dir); if(step==8)step=0; delay_ms(speed); } }能关掉步进电机但是不知道怎么打开

jf_63280182

这个是我的：

jf_63280182

打错了，我重新发