first.c

This Project will run Stepper Motorbased on LMD18245 IC

#include <regx52.h>
unsigned int i=0,j;
bit Stop_Flag=0,Start_Flag=0;
//code char step_2[]={0xBB,0xF0,0xBB,0x0F};
//code char step_4[]={0x6E,0xBB,0xE6,0xF0,0xE6,0xBB,0x6E,0x0F};
code char step_4[]={0x6E,0x8D,0xBB,0xE6,0xF3,0xF0,0xF3,0xE6,0xBB,0x8D,0x6E,0x0F};
//code char step_4[]={0x0F,0x6E,0xBB,0xE6,0xF0,0xE6,0xBB,0x6E,0x0F,0x6E,0xBB,0xE6,0xF0,0xE6,0xBB,0x6E};
//code char step_4[]={0xF0,0xE6,0xBB,0x6E,0x0F,0x6E,0xBB,0xE6,0xF0,0xE6,0xBB,0x6E,0x0F,0x6E,0xBB,0xE6};
//code char step_8[]={0x3F,0x6E,0x8D,0xBB,0xD8,0xE6,0xF3,0xF0,0xF3,0xE6,0xD8,0xBB,0x8D,0x6E,0x3F,0x0F};
//code char step_10[]={0x0f,0x2f,0x3e,0x7d,0x9c,0xbb,0xc9,0xd7,0xe3,0xf2,0xf0,0xf2,0xe3,0xd7,0xc9,0xbb,0x9c,0x7d,0x3e,0x2f,
//					0x0f,0x2f,0x3e,0x7d,0x9c,0xbb,0xc9,0xd7,0xe3,0xf2,0xf0,0xf2,0xe3,0xd7,0xc9,0xbb,0x9c,0x7d,0x3e,0x2f};

void main(void)
{
EA=1;
IT0=1;
IT1=1;
EX0=1;
EX1=0;
IP=1;
//P1=0x0f;
while(1)
{
if (P2_7==0)
{
	Stop_Flag=1;
}
///*/	
if(Stop_Flag==1)
	{
		EX0=1;
		EX1=0;
		for(j=0;j<1020;j++);
		P2_3=0;
		P2_2=1;	
		Stop_Flag=0;
		Start_Flag=0;	
	}	//   */
}
}
void ex1_isr(void)	interrupt 2 using 2
{

if (P2_7==0)
{
//	IT0=1;
	
	EX0=1;
	EX1=0;
	Stop_Flag=1;
}

if(Stop_Flag==0)
{
//P1=0xFF;
	P1 = step_4[i];
/*
	if(i==0)
	{
	P2_0=1;
	P2_1=1;
	}		
	if(i==10)
	{
	P2_0=1;
	P2_1=0;
	}
	if(i==20)
	{
	P2_0=0;
	P2_1=0;
	}
	if(i==30)
	{
	P2_0=1;
	P2_1=1;
	}			  ///	 */
///*	
	if (P1 == 0x0F )		//15,00	DIR CHANGE
	{
	  P2_1=~P2_1;
	}
	
	if (P1 == 0xF0)		//00,15	DIR CHANGE
	{
	P2_0=~P2_0;
	}		//			 */
	
	i++;
	if(i>=12)	i=0;
 }
}
void ex0_isr(void)	interrupt 0	using 0
{
if (Start_Flag==0)
{
	Stop_Flag=0;
	EX1=1;
	P2_2=0;
	P2_3=1;
//	IP=5;
//	IT1=1;
	EX0=0;
//	i=0;
//	P2_0=0;
//	P2_1=0;
//	IT0=0;
	Start_Flag=1;
				//EXT.INT.EX1 ENABLE FOR CLOCK P3.3#13
}
}