#include <REG52.H>
#include "public.h"
#include "stepmotor.h"
#include "key.h"
sbit IN1_D=P1^0;
sbit IN1_C=P1^1;
sbit IN1_B=P1^2;
sbit IN1_A=P1^3;
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 SPEEDMAX 1//设定步进旋转速度最大值
#define SPEEDMIN 5//设置步进旋转速度最小值
int stepmove=0;//步进电机旋转标志位，0为停止，1为旋转


typedef unsigned int u16;	//对系统默认数据类型进行重定义
typedef unsigned char u8;
typedef unsigned long u32;

void Delay(unsigned int xms)
{
	unsigned char i, j;
	while(xms--)
	{
		i = 2;
		j = 239;
		do
		{
			while (--j);
		} while (--i);
	}
}

void step_28byj48_control(u8 step,u8 dir)//步数和方向设置函数
{
	u8 temp=step;
	
	if(dir==0) temp=7-step;
	
	switch(temp)
	{
		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;	
	}
}

unsigned char key_scan()
{
	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(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;
	u8 step=0;
	u8 speed=SPEEDMAX;	
 
	time0_init();//定时器0中断配置
	
	while(1)
	{		
		key=key_scan();	
//***************步进电机转停与转向控制模块		
			if(key==KEY1_PRESS)//按键一按下令步进电机旋转或停止
			{
				stepmove=!stepmove;
			}				
		
			if(stepmove==1)	//判断是否要让步进电机旋转
			{
				step_28byj48_control(step++,dir);
				if(step==8)	step=0;
				Delay(speed);
			}
			
			if(key==KEY4_PRESS)//按下按键四令步进电机反转	
			{
				dir=!dir;			
			}	
//*********步进电机速度控制环节		
			else if (key==KEY2_PRESS)//按下按键二令步进电机加速se if (key==KEY3_PRESS)  
			{
				if(speed>SPEEDMAX)
					speed-=1;
			}	
			{
				if(speed<SPEEDMIN) //按下按键三令步进电机减速
					speed+=1;	
			}Delay(SPEEDMAX);//通过每一步的延时来调节步进电机的速度			
	}	//while
}//main