单片机原理及接口技术实验报告-步进电机（开源）

#include "reg51.h"
#define uchar unsigned char
#define uint unsigned int
#define out  P2
sbit pos=P0^0;
sbit neg=P0^1;
void delayms(uint);
uchar code turn[]={0x02,0x06,0x04,0x0c,0x08,0x09,0x01,0x03};


void main(void)
{
	uchar i;
	out=0x03;
	while(1)
	{
		if(!pos)
		{
			i = i < 8 ? i+1 : 0;
			out=turn[i];
			delayms(50);
		}
		else if(!neg)
		{
			i = i > 0 ? i-1 : 7;	
			out=turn[i];
			delayms(50);
		}	
	}
}

void delayms(uint j)
{
	uchar i;
	for(;j>0;j--)
  	{
		i=250;
	   	while(--i);
	   	i=249;
	   	while(--i);
   	}
}