lv.c

my project DC controller

#include<reg51f.h>


//-----------------------------------------------------

 
#define TOCDO		CCAP4H		//XUAT PWM RA P1.7																			
#define CHIEU		CEX3		//XUAT ON-OFF RA P1.6	  >0 la di toi    <0 la di nguoc lai



//Ham khoi tao cac chuc nang cua mCU
void init(void)
{
	CCAPM4 = 0x42;
	CR=1;	
	CCAP4H = 0;
	TMOD=0x50;
	SCON=0x20;
	TH1=-13;
	TR=0;
	TI=0;
}



/**************************************************/
//Delay

void delay(unsigned int count)
{
	while(count)
	{
		count--;
	}
}


void speed(signed int tdo)
{
	if (tdo>=0)
	{	
		CHIEU=1;
		TOCDO=  (255-tdo);
	}							
	else
	{
		CHIEU=0;
		TOCDO=  (255+tdo);
	}							
		
}

char get_data()
{
	char geti;
	while(RI!=1);
	geti=SBUF;
	RI=0;
	return geti;
}


void main()

{	int i=0;
	init();
   	while (1) 
   	{	
		i=geti();
		speed(i);
		delay(10000);

	}	 
/*	{
	P0=0xff;
	delay(10000);
	P0=0x00;
	delay(10000);
	 }	   */
	
}