/* ***************** 寫程序者 *********************
控制角度為9度（每步進(jìn)為9度步進(jìn)）

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

# include <at89x51.h>

unsigned char codes[2][8]={{0x02,0x06,0x04,0x0c,0x08,0x09,0x01,0x03},  //9,18,36,45,54,63,72,81度 順時(shí)針
					   {0x0b,0x09,0x0d,0x0c,0x0e,0x06,0x07,0x03}};  //9,18,36,45,54,63,72,81度 逆時(shí)針
unsigned char counts,flag,t;
		//	   度數(shù)，正/反轉(zhuǎn)，速度控制
delay(unsigned char x)			//延時(shí)
{
	unsigned char i;
	for( i=0;i<x;i++);
}
main()
{
	TMOD=0x01;				   //定時(shí)器初始化
	TH0=(65536-5000)/256;
	TL0=(65536-5000)%256;
	EA=1;
	ET0=1;
	TR0=1;
	while(1)
	{
		if(P0_0==0)			  //判斷正轉(zhuǎn)按鍵是否按下
		{
			delay(5);
			if(P0_0==0)	flag=0;	  //判斷是否真正按下
		}
		if(P0_1==0)		   	//判斷反轉(zhuǎn)按鍵是否按下
		{
			delay(5);
			if(P0_1==0) flag=1;		//判斷是否真正按下
		}

	}
}

void motor() interrupt 1
{
	t++;							 //控制速度
	if(t==8)
	{
		t=0;
		P1=codes[flag][counts];		 //轉(zhuǎn)動(dòng)
		counts++;
		if (counts==8)	counts=0;	 //角度重置
	}
	TF0=0;							 //重新計(jì)時(shí)
	TH0=(65536-5000)/256;
	TL0=(65536-5000)%256;
}