SYBSCIT Embedded System Practical's code.

 

Practical 1

#include<reg51.h>

void main (void)

{

unsigned char x,y,z;

x=0x34;

y=0xa9;

P1=0x00;

z=x+y;

P1=z;

}

Practical 2a

#include<reg51.H>
		void Delay(void);
		void main(void)
		{
		while(1)
		{
		P1 = 0xFF; // Make all bits of P1 high
		Delay();
		P1 = 0x00; // Make all bits of P1 low
		Delay();
		}
		}
		void Delay(void)
		{
		int j;
		int i;
		for(i = 0; i < 1000; i++)
		{
		}
		for(j = 0; j < 1000; j++)
		{
		}
		}

Practical 2b

#include<reg51.h>

void main(void)

{

unsigned char x;

P2=0x7F;

P3=0x00;

while(1)

{

x=P2;

P3=x;

}

}

Practical 3a

#include<reg51.h>
	void delay(int time);
	void main()
	{
	P1 = 00000000;
	while(1)
	{
	P1++;
	delay(100);
	}
	}
	void delay(int time)
	{
	int i, j;
	for(i = 0; i <= time; i++)
	{
	for(j = 0; j <= 23; j++)
	{
	}
	}
	}

Practical 3b

#include<reg51.h>
	void delay();
	void main()
	{
	while(1)
	{
	P1 = 0xAA; // Pattern to turn on alternate LEDs - 10101010
	delay();
	P1 = 0x55; // Reverse the pattern
	delay();
	}
	}
	void delay()
	{
	unsigned int i, j;
	for(i = 0; i < 24; i++)
	{
	for(j = 0; j < 1000; j++)
	{
	}
	}
	}

Practical 4a

#include<reg51.h>
	void send(char x);
	void main(void)
	{
	TMOD = 0x20;
	TH1 = 0xFD;
	SCON = 0x50;
	TR1 = 1;
	send('E');
	send('M');
	send('B');
	send('E');
	send('D');
	send('D');
	send('E');
	send('D');
	while(1);
	}
	void send(char x)
	{
	SBUF = x;
	while(TI == 0);
	TI = 0;
	}

Practical 4b

#include<reg51.h>
	void delay(unsigned int ms)
	{
	unsigned int i, j;
	for(i = 0; i<ms; i++)
	{
	for(j = 0; j<=1275; j++)
	{
	}
	}
	}
	void main(void)
	{
	char number[] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F};
	int i, j;
	P2 = 0x00;
	P3 = 0x00;
	while(1)
	{
	for(i = 0; i<=9; i++)
	{
	P2 = number[i];
	for(j = 0; j<=9; j++)
	{
	P3 = number[j];
	delay(50);
	}
	}
	}
	}

Practical 4c ( square wave)

#include<reg51.h>
	void delay();
	void main()
	{
	P2 = 0x00;
	while(1)
	{
	P2 = 0xFF;
	delay();
	P2 = 0x00;
	delay();
	}
	}
	void delay()
	{
	int i;
	for(i = 0; i <= 5000; i++)
	{
	}
	}

Practical 5a ( triangular wave)

#include<reg51.h>
	void main()
	{
	P2= 0x00;
	while(1)
	{
	do
	{
	P2 += 0x05;
	}
	while(P2 < 0xFF);
	do
	{
	P2 -= 0x05;
	}
	while(P2 > 0x00);
	}
	}

Practical 5b

#include<reg51.h>
	#include<stdio.h>
	int sine[]={0,0,5,10,5,15,20,25,30,35,40,45,45,40,35,30,25,20,15,10,5,0,0};
	void main()
	{
	int i;
	P1=0x00;
	while(1)
	{
	for(i=0;i<23;i++)
	{
	P1=sine[i];
	}
	}
	}

Practical 6

#include<reg51.h>

#include<stdio.h>

void delay(int);

void main()

{

 do

 {

 P2 = 0x03; //0011

 delay(5000);

 P2 = 0x06; //0110

 delay(5000);

 P2 = 0x0C; //1100

 delay(5000);

 P2 = 0x09; //1001

 delay(5000);

 P3 = 0x09; //1001

 delay(2000);

 P3 = 0x0C; //1100

 delay(2000);

 P3 = 0x06; //0110

 delay(2000);

 P3 = 0x03; //0011

 delay(2000);

 }

while(1);

}

void delay(int k)

{

 int i,j;

 for(i=0;i<k;i++)

 {

for(j=0;j<100;j++) {}

 }

 }