#include "c8051f020.h"                
#include <intrins.h>
#define CPTIME 4

/************************************************************
	步進電機控制試驗

	試驗準備:用連接線分別將CN4的P12,P13,P14,P15端子與CN1的LED1
	LED2,LED3,LED4相連.
	運行此程序,觀察步進電機的轉速和旋轉方向,LED的變化情況.

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


void Delay1ms(unsigned char T);

void TestStepM(void)
{
char x,i,j;
char FTab[]={0xc7,0xcb,0xd3,0xe3};
char CTab[]={0xc7,0xe3,0xd3,0xcb};
for (x=0;x<5;x++)
{

	P27=1;
	for (i=0;i<100;i++)
	{
		for (j=0;j<4;j++)
		{
			P1 = FTab[j];
			Delay1ms((20-i/10)*CPTIME);
		}
	}
	for (i=0;i<100;i++)
	{
		for (j=0;j<4;j++)
		{
			P1 = FTab[j];
			Delay1ms(10*CPTIME);
		}
	}
	for (i=0;i<100;i++)
	{
		for (j=0;j<4;j++)
		{
			P1 = FTab[j];
			Delay1ms((10+i/10)*CPTIME);
		}
	}
	P27=0;
	for (i=0;i<100;i++)
	{
		for (j=0;j<4;j++)
		{
			P1 = CTab[j];
			Delay1ms((20-i/10)*CPTIME);
		}
	}
	for (i=0;i<100;i++)
	{
		for (j=0;j<4;j++)
		{
			P1 = CTab[j];
			Delay1ms(10*CPTIME);
		}
	}
	for (i=0;i<100;i++)
	{
		for (j=0;j<4;j++)
		{
			P1 = CTab[j];
			Delay1ms((10+i/10)*CPTIME);
		}
	}
}  
	P27=1;
}