es lab manual-jntuk

INDEX

S.No Exp.No.

Date Name of Experiments Page.No.

Remarks Signature

1. 1.a 27-06-08 Write a program to Read inputs from switches.

1

2. 1.b 10-07-08 Write a program to To make LEDs blink. 2.

3. 2 18-07-08 Write a Program for serial communication.

3.

4. 3 1-08-08 Write a program for encruption/decruption.

5.

5. 4 22-08-08 Develop necessary interfacing circuit to read data from a sensor and process using the 8051board. The data has to be displayed on a board lcd screen.

9.

6. 5. 19-09-08 Verifying mCOS on 89C51 board 12

7. 6. 3-10-08 Simulate on elevator movement using RTOs .

17

EXPERIMENT NO: 1 (a) DATE: 27-06-08

AIM: write a program to read inputs from switches

SOURCE CODE:

#include<8051.h>

__xdata __at (0xffc0) unsigned char ledptr; //led location__xdata __at (0xffc1) unsigned char swtptr; // switch location

unsigned int switch_data;

void main(){

while(1){ledptr=swtptr;}

}

OUTPUT:

PVP SIDDHARTHA INSTITUTE OF TECHNOLOGY 1

EXPERIMENT NO: 1(b) DATE: 10-07-08

AIM: write a program to make LED’s blink

SOURCE CODE:

#include<8051.h>__xdata __at (0xffc0) unsigned char ledptr; //led location__xdata __at (0xffc1) unsigned char swtptr; // switch location__xdata __at (0xffc2) unsigned char segptr;__xdata __at (0xffc3) unsigned char seg2ptr; unsigned int switch_data;

void main(){

while(1){ledptr=swtptr;

seg2ptr=0x08;

segptr=swtptr;}

}

OUTPUT:


EXPERIMENT NO: 2 DATE: 18-07-08

AIM: Write a program for serial communication.

SOURCE CODE:

#include<8051.h>#include<serial_IO.h>unsigned char c;

void serial_init() // Initialize UART baud rate to 9600{

TMOD = 0X20;TH1 = 0XFD;TI = 1;TR1 = 1;SCON = 0X52;//PCON =0x80;

}

void main(){ serial_init();

while(1){

c = getchar();putchar(c);

}}


OUTPUT:



AIM: Write a program for Encryption / Decryption.

SOURCE CODE:

#include <8051.H>#include<stdio.h>#include<serial_io.h>#include<string.h>

void serial();void encrypt();void tx(); void delay();void rx();void arr();void arr1();unsigned char b[5]={0x38,0x01,0x06,0x0c,0x80};unsigned char b1[]={"PVPSIT"};unsigned char b2[7];unsigned char b3[8];int k,m,n;unsigned char a[50];unsigned int i,l,cnt=0;unsigned char key;void main(){serial();while(1){ rx(); printf("\n \t ENTER THE PASSWORD:\t "); arr(); if(strcmp (b1,b2)==0) { tx(); delay();

return; } else printf("\n \r YOU ARE UNAUTHORISED PERSON ");}}


void serial(){TMOD = 0X20;TH1 = 0XFD;TI = 1;TR1 = 1;SCON = 0X52;//PCON = 0x80; }

void rx(){ printf("\n\r----------------------------------------------------------------"); printf("\n\r ENCRYPTION "); printf("\n\r----------------------------------------------------------------\n\r"); printf("\n \t ENCRYPTED DATA: \t");

for(i=0;i<50;i++) { while(RI!=1); RI=0; a[i]=SBUF; if(a[i]==0x0d) break; SBUF=SBUF+0x30; cnt++; } return;}

void tx(){

printf("\n\r----------------------------------------------------------------"); printf("\n\r DECRYPTION "); printf("\n\r----------------------------------------------------------------\n"); printf("\n DECRYPTED DATA: \t"); for(i=0;i<=50;i++) {SBUF=SBUF-0x30;SBUF=a[i]; while(TI!=1);TI=0; } cnt=0; return;


} void delay(){

unsigned int m;for(m=0;m<0x0f;m++);

}

void arr(){ unsigned char i; for(i=0;i<=6;i++) {

while(RI==0);b2[i]=SBUF;SBUF=0x2a;

while(TI==0); TI=0;

RI=0; } b2[i]='\0';}

OUTPUT:

INCORRECT PASSWORD


CORRECT PASSWORD



AIM: Develop necessary interfacing circuit to read data from sensor and process using the 8051 board. The data has to be displayed on a PC monitor.

SOURCE CODE:

#include "8051.h"/*--------------------------------------------*/__xdata __at 0xffc5 unsigned char ledr; __xdata __at 0xffc3 unsigned char sel174;__xdata __at 0xffc4 unsigned char lcdsel;

unsigned int s;/*--------------------------------------------*/void delay(){ int i,j;for(i=0;i<0x3f;i++)for(j=0;j<0xff;j++);} /*-------------------------------------------*/void busycheck(){delay();sel174 = 0x00; }/*--------------------------------------------*/void lcd_write(unsigned char *temp,int cnt){int i;for(i=0;i<cnt;i++){busycheck();sel174=0x01;lcdsel= *temp;temp++;}}/*-------------------------------------------*/void main(){

busycheck();lcdsel = 0x38; // Configure Interface length, No of display lines


busycheck();lcdsel = 0x06; // Shift Cursor Positionbusycheck();lcdsel = 0x01; // Clear LCD busycheck();lcdsel = 0x0f; // Turn On display,cursor and cursor blinkbusycheck();lcdsel = 0x80; while(1)

{s=ledr;s = ((s&0x20)>>0x05);if(s==0)

{ lcd_write("No Object",9); busycheck(); lcdsel = 0x01; }

if(s==1) { lcd_write("Object Present",14); busycheck(); lcdsel = 0x01; }

}}

OUTPUT: (NO OBJECT IN SENSOR)


(OBJECT IN SENSOR)


AIM: Sort RTOS (mCOS) on to 89C51 board

SOURCE CODE:

#include "includes.h"#include "ucos_ii.h"#include "test.h"#include <at89c51ed2.h>#include <serial_IO.h>

OS_STK Task1stk[100]; OS_STK Task2stk[100];OS_STK Task3stk[100];

xdata at 0xffc0 unsigned char ledptr;xdata at 0xffc2 unsigned char segmentselPtr;

xdata at 0xffc3 unsigned char sel174;xdata at 0xffc4 unsigned char lcdsel;

void timer2_ISR ( void ) interrupt TIMER2_OVERFLOW { TF2 = 0; // Clear timer2 overflow flag. EXF2 = 0; // clear T2 Ext input flag.

// disable Interrupts, Turn off the timer. EA = 0; TR2 = 0; //writeDataExt("begin timer0_isr\n");

OSIntSaveCtx();

//writeDataExt("timer0\n");

/* unnecessary auto-reload set*/ TH2 = RELOAD_HI; TL2 = RELOAD_LO;

OSIntEnter(); //Read-modify-write increment of "OSIntNesting" OSTimeTick(); //Call process TR2 = 1; // start the timer again OSIntExit(); //Decrement OSIntNesting, and determine whether return to this //isr or a new Task


OSIntRestoreCtx(); EA = 1;}

void delay(){unsigned int i,j;for(i=0;i<0xff;i++)for(j=0;j<0xff;j++);}

void initStartTimersInterrupts(){ T2CON = 0x00; //0000,0000 T2CON: Timer2 T2MOD = 0x00; RCAP2H = RELOAD_HI; RCAP2L = RELOAD_LO; TH2 = RELOAD_HI; TL2 = RELOAD_LO;

TR0 = TR1 = TR2 = 0; //Stop all 3 timers TF2 = 0;

PT2 = 1; //Timer2 gets highest priority, system time

TF2 = 0; // Clear timer2 overflow flag.

ET2 = 1; //Timer2 Interrupt enabled EA = 1; //all interrupts TR2 = 1;

}void serial_init()reentrant{

TMOD = 0X20;TH1 = 0XFD;TI = 1;TR1 = 1;SCON = 0X52;//PCON =0x80;

}


void delay2(){ int i,j;for(i=0;i<0xf;i++)for(j=0;j<0xff;j++);}

void busycheck(){

delay2(); sel174 = 0x00; }

void task1(void *ptr) {

ptr=ptr;initStartTimersInterrupts();

while(1){

ledptr = 0x00;delay();ledptr = 0x0f;delay();ledptr = 0x00;OSTimeDly(300);

}}

void task2(void *ptr) {unsigned char array[] ={"uC/OS II Welcome"}; unsigned char array1[] ={" by Vi MicroSys "}; unsigned char i; ptr=ptr;while(1) {

busycheck(); lcdsel = 0x38;




busycheck(); lcdsel = 0x0f;


for (i=0;i<16;i++){

busycheck(); delay2(); sel174 = 0x01; lcdsel = array[i]; } busycheck(); lcdsel = 0xC0;

for (i=0;i<16;i++){

busycheck(); delay2(); sel174 = 0x01; lcdsel = array1[i]; }

OSTimeDly(200);

} }

void task3(void *ptr) {

ptr=ptr;ledptr = 0x00;delay();ledptr = 0xf0;delay();ledptr = 0x00;OSTimeDly(50);

}

void main(void){

OSInit();

OSTaskCreate(task1, 0, &Task1stk[49], 4); // LED -0fOSTaskCreate(task2, 0, &Task2stk[49], 5); // LCD


OSTaskCreate(task3, 0, &Task3stk[49], 6); // ledf0

OSStart();}

OUTPUT:



AIM: Simulate on Elevator movement using RTOS on 89C51 board.

SOURCE CODE:

#include "includes.h"#include "ucos_ii.h"#include <P89c51RD2.h>#include <stdio.h>

OS_STK Task1stk[100]; //task stack creation OS_STK Task2stk[100];

unsigned int cur=0;unsigned char temp;

__xdata __at 0xffc0 unsigned char led; // assigned led address__xdata __at 0xffc5 unsigned char swt; // address for elevator switches__xdata __at 0xffc6 unsigned char ledptr; // address for elevator leds__xdata __at 0xffcc unsigned char wheel; // address for elevator thumb wheel

void TimerInitiate(unsigned char Crystal,unsigned char Frequency);data INT16U TickCount;void UserTickTimer(void) {

TickCount++;}/*---- Timer0 ISR----*/void timer0_ISR ( void ) interrupt 1 { EA = 0; TR0 = 0; temp=IE; OSIntEnter(); UserTickTimer(); OSTimeTick(); TimerInitiate(12,1000); OSIntExit(); IE=temp; EA = 1;}void TimerInitiate(unsigned char Crystal,unsigned char Frequency){ unsigned long temporary = 0; temporary = 1000000 / (12 * Frequency);


temporary = 65535 - Crystal * temporary; TMOD = (TMOD & 0XF0) | 0X01; /* Timer 0 working in MODE 1 */

TL0 = (unsigned char )temporary;TH0 = (unsigned char )(temporary >> 8);TR0 = 1;

ET0 = 1;}/*----Task1 Routine for elevator simulation----*/void task1 (void){

char floor[6] = { 0x10,0x08,0x04,0x02,0x01};char ref[6] = { 0x1F,0x1E,0x1D,0x1C,0x1B};char cur = 0;char req,k;ledptr = 0x10;while(1){

k = (swt & 0x1f);req = (wheel & 0x1F);if(k == 0x0F && req > 0x1A ){

if(ref[cur] == req){

ledptr = floor[cur];}else if(ref[cur] < req){

while(ref[cur] != req){

cur = cur - 1;ledptr = floor[cur];OSTimeDly(40);

}}else if(ref[cur] > req){

while(ref[cur] != req){

cur = cur + 1;ledptr = floor[cur];OSTimeDly(40);

}}

}OSTimeDly(40);

}


}void task2(void) {

while(1){

ledptr = 0x00;OSTimeDly(20);ledptr = 0x0f;OSTimeDly(20);ledptr = 0x00;OSTimeDly(20);

}}

void main(void){

OSInit(); // Call OS InitializationTimerInitiate(12,1000); // Call timer initilizationOSTaskCreate(task1, 0, &Task1stk[99], 4); // Task creation

OSTaskCreate(task2, 0, &Task1stk[99], 2);OSStart(); // Start Multitasking

}OUTPUT:


es lab manual-jntuk

Documents

pvp siddhartha

include xdata

unsigned char

unsigned char

unsigned char

ledptrswtptr

source code

th1 0xfd