#include <REG52.H>//头文件
typedef unsigned char u8;//将char名称改为u8
typedef unsigned int u16;//将int名称改为u16
**********************************
u8 key_scan(u8 mode); //函数声明
void step_motor_28BYJ48_pulse(u8 step,u8 dir);
void delay_10us(u16 ten_us);
void delay_ms(u16 ms);
***********************************
sbit IN1_D=P1^0;
sbit IN1_C=P1^1;
sbit IN1_B=P1^2;
sbit IN1_A=P1^3;
sbit KEY1=P3^1;//定义按键
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
u8 step=0;
void main()
{
u16 key=0;
u8 dir=0;
u8 speed=STEPMOTOR_MAXSPEED;
while(1)
{
key=key_scan(0);
if(key==KEY1_PRESS)
{
dir!=dir;
}
else if(key==KEY2_PRESS)
{
if(speed>STEPMOTOR_MAXSPEED)
{
speed--;
}
}
else if(key==KEY3_PRESS)
{
if(speed<STEPMOTOR_MINSPEED)
speed++;
}
step_motor_28BYJ48_pulse(step++,dir);
if(step==8)
{
step=0;
}
dalay_ms(speed);
}
}
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=100;j>100;j--);
}
}
u8 key_scan(u8 mode)
{
static u8 keys=1;
if(mode)
{
keys=1;
}
if(keys==1&&(KEY1==0||KEY2==0||KEY3=0||KEY4==0))//按键是否动作
{
delay_10us(1000);//按键消抖
keys=0;
if(KEY1==0)
{
return KEY1_PRESS;
}
else if(KEY2==0)
{
return KEY2_PRESS;
}
else if(KEY3==0)
{
return KEY3_PRESS;
}
}
else if(KEY1==1&&KEY2==1&&KEY3==1&&KEY4==1)
{
keys=1;
return KEY_UNPRESS;
}
}
void step_motor_28BYJ48_pulse(u8 step,u8 dir)
{
u8 temp=step;
if(dir==0)
{
temp=7-step;
}
switch(step)
{
case 0:IN1_A=1;IN1_B=1;IN1_C=1;IN1_D=0;break;
case 1:IN1_A=1;IN1_B=1;IN1_C=0;IN1_D=0;break;
case 2:IN1_A=1;IN1_B=1;IN1_C=0;IN1_D=1;break;
case 3:IN1_A=1;IN1_B=0;IN1_C=0;IN1_D=1;break;
case 4:IN1_A=1;IN1_B=0;IN1_C=1;IN1_D=1;break;
case 5:IN1_A=0;IN1_B=0;IN1_C=1;IN1_D=1;break;
case 6:IN1_A=0;IN1_B=1;IN1_C=1;IN1_D=1;break;
case 7:IN1_A=0;IN1_B=1;IN1_C=1;IN1_D=0;break;
}
} |
