EmbeddedSystemProgram Assembly and c program.

1.Write an assembly language program for addition, subtraction and

multiplication of two 16 bit numbers.

;ADDITION OF 16BITS

;MOV R1,#0ABH

;MOV R2,#012H

;MOV R3,#026H

;MOV R4,#78H

;MOV A,R1

;ADD A,R3

;MOV R6,A

;MOV A,R2

;ADDC A,R4

;MOV R7,A

;SUBSTRACTION OF 16BITS

;MOV R1,#0ABH

;MOV R2,#012H

;MOV R3,#026H

;MOV R4,#78H

;MOV A,R2

;SUBB A,R4

;MOV R6,A

;MOV A,R1

;ADDC A,R3

;MOV R7,A

##Multipling 16 bit numbers##

ORG 0000H

MOV R0,#0FFH ;MSB1

MOV R1,#0EFH ;MSB2

MOV R2,#0FFH ;LSB1

MOV R3,#9DH  ;LSB2

MOV A,R2

MOV B,R3

MUL AB

MOV R4,A

MOV R5,B

MOV A,R2

MOV B,R1

MUL AB

MOV R6,B

ADDC A,R5

MOV R5,A

MOV A,R1

MOV B,R4

MUL AB

ADDC A,R5

MOV R5,A

MOV A,B

ADDC A,R6

MOV R6,A

MOV A,R1

MOV B,R2

MUL AB

ADDC A,R6

MOV R6,A

MOV A,B

ADDC A,#00H

MOV R7,A

2. Implement an assembly language program to print sum of first “n”

natural numbers.

ORG OOOOh

    LJMP main

    ORG 0x40h

main:

    MOV R0,#0Ah      ;

    MOV B,R0

    INC R0

    MOV A,R0

    MUL AB           

    MOV B,#02h

    DIV AB           

    MOV R4,A

3. Write an assembly language program to check whether the given

number is EVEN or ODD.

  

   ORG 000H

    MOV A,#02DH

    RRC A 

    JC  ODD

    MOV A,#00H 

  SJMP EVEN         

ODD: MOV A,#01H

EVEN:  NOP

4. Write a program in Edsim to find factorial of a number.

ANS-->

MOV R7,A

FACT:

MOV A,R7

CJNE R1,#00,UP

SJMP UP1

UP:

MOV B,R1

MUL AB

DJNZ R1,UP

UP1:

RET

5. Write a program to generate the sum of Fibonacci series for n

terms.

ORG 0000H

LJMP MAIN

ORG 40H

MAIN: MOV R0,#40H

MOV R3,#8H

MOV R1,#00H

MOV @R0,#0H

INC R0

MOV @R0,#01H

MOV R2,#01H

LABEL2: INC R0

MOV A,R1

ADD A,R2

MOV @R0,A

MOV B,R2

MOV R1,B

MOV R2,A

DJNZ R3,LABEL2

END

Write the C Program in Keil Embedded C:

1. Write a C program for the 8051 to:

a. addition of 8-bit two numbers and show the output on port P1.

ans→

#include

int main()

{

unsigned char x,y,z=0;

x=0x44;

y=0x22;

P1=0x00;

z=x+y;

P1=z;

}

b. addition of 16-bit two numbers and show the output on port P1 &P2.

ans→

#include

int main()

{

int a,b,c,d,ans1,ans2;

a=0x02;

b=0x30;

c=0x40;

d=0x12;

P0=P1=P2=0;

ans1=a+b;

if(ans1 > 0xff)

ans2=0x01;

ans2=ans2+c+d;

if(ans2 > 0xff)

P0=0x01;

P1=ans1;

P2=ans2;

} 

c. addition of 8-bit two numbers. Take input from port p1 & P2 and show result on

portP3.

ANS--->

#include

int main()

{

char a,b,ans=0;

a=P1,b=P2;

ans=a+b;

P3=ans;

}

d. addition of 16-bit two numbers. Take input from port P1, P2 & P3, P4 and display

result on port P3 & P4.

ans→

#include

int main()

{

int a,b,c,d,ans1,ans2;

a=P0,b=P1,c=P2,d=P3;

ans1=a+b;

if(ans1 > 0xff)

ans2=0x01;

ans2=ans2+c+d;

if(ans2 > 0xff)

P0=0x01;

P2=ans1;

P3=ans2;

} 

2.Write a program in Keil Embedded C to find factorial of a number. Show

Output on ports.

int main()

{

int a,b=1,c,d,ans1,ans2,i;

a=P0;//p0=N;

for(i=1;i<=a;i++)

 a=a*i;

P1=a;

}

3. Write a program to generate the sum of Fibonacci series for n term,

where input is taken from port.

#include

int main()

{

int a,b,c,d,ans1=1,ans2;

a=P0;// P0=0

b=P1;//P1=1;

c=P2;//P2=N;

P3=0

d=0;

for(i=0;i

{

d=a+b;

a=b;

b=d;

ans1=ans1+b;

} 

P3=b;

P2=ans1;

}