This document contains details of a student's microcontroller lab tasks, including the student's name, registration number, course code, and instructor details. It also includes 8 questions involving assembly language programs to perform tasks like arithmetic operations, data transfers, and conversions. The programs are written in assembly language for the 8051 microcontroller and include steps to test the programs using a simulator.

1. NAME :
REG.NO : 19BEC0858
COURSE CODE : ECE3003
COURSE TITLE : MICROCONTROLLER AND ITS
APPLICATIONS
SHAHUKARI CHETAN
LAB TASK - 1
FALL Semester 2020-21
19BEC0858
SHAHUKARI CHETAN
FACULTY NAME : PROF. SUNDAR .S
SLOT : L41+L42
Basic Assembly Language
Programs

2. 19BEC0858
SHAHUKARI CHETAN
QUESTION -01
Write a program to find the Decimal sum of the 5 bytes of data from code space starting at
address 300H and store the Sum part of the result into RAM Space of 50H and Carry part of the
results in to 60H .The data must be your Mobile number
PROGRAM:-
ORG 0000H
MOV R0,#50H
MOV R1,#60H
MOV R2,#05H
MOV DPTR,#300H
MOV R3,#00
MOV R4,#00
LOOP: MOV A,#00
MOVC A,@A+DPTR
ADD A,R3
MOV R3,A
JNC CON
INC R4
CON:INC DPTR
DJNZ R2,LOOP
MOV A,R3
MOV @R0,A
MOV A,R4
MOV @R1,A
HERE:SJMP HERE
ORG 300H
DB 95,02,18,12,00
END

3. 19BEC0858
SHAHUKARI CHETAN
RESULT:-

4. 19BEC0858
SHAHUKARI CHETAN
OBSERVATION:-
We can observe that the final sum of 95+02+18+12+00=127 in Decimal is stored as
Hexadecimal with the sum part at 50H and carry part at 60H. Sum part value will be “7F”and
carry value will be “0” therefore total sum will be “7F” in hexadecimal form.
QUESTION - 02
Write and assemble a program to add the following data and then use the simulator to examine
the CY flag. 92H, 23H, 66H, 87H, F5H
PROGRAM:-
Org 0000h
MOV A,#92H
MOV B,#23H
ADD A,B
JNC L1
INC R0
L1: MOV B,A
MOV A,#66H
ADD A,B

5. 19BEC0858
SHAHUKARI CHETAN
JNC L2
INC R0
L2: MOV B,A
MOV A,#87H
ADD A,B
JNC L3
INC R0
L3: MOV B,A
MOV A,#0F5H
ADD A,B
JNC L4
INC R0
L4:
END

6. 19BEC0858
SHAHUKARI CHETAN
RESULT:-
OBSERVATION:-
In this we used to add two numbers that are been stores in A and B register with
the help of the “ADD” command and the final result store in the “A” register.
QUESTION - 03
Write and assemble a program to load values into each of registers R0 - R4 and then push
each of these registers onto the stack. Single-step the program, and examine the stack and
the SP register after the execution of each instruction.
PROGRAM:-
ORG 000H
MOV R0,#01H
MOV R1,#07H
MOV R2,#09H
MOV R3,#05H
MOV R4,#03H

7. 19BEC0858
SHAHUKARI CHETAN
PUSH 0
PUSH 1
PUSH 2
PUSH 3
PUSH 4
END
RESULT:-

8. 19BEC0858
SHAHUKARI CHETAN
OBSERVATION:-
In the above output we overserve that we were able to pop the data out of stack and also see the
variation in stack pointer
QUESTION - 04
Write and assemble a program to:
(a) Set SP = 0D
(b) Put a different value in each of RAM locations 0D, 0C, 0B, 0A, 09, and 08,
(c) POP each stack location into registers R0 - R4. Use the simulator to single-step and
examine the registers, the stack, and the stack pointer.
PROGRAM:-
ORG 0000H
MOV SP,#0DH
MOV 0DH, #10H
MOV 0CH, #11H
MOV 0BH, #12H
MOV 0AH, #13H
MOV 09H,#14H
MOV 08,#16H
POP 0
POP 1
POP 2
POP 3
POP 4
END

9. 19BEC0858
SHAHUKARI CHETAN
RESULT:-
OBSERVATION:-
In this code with the help of the “pop” command we used to pop the values of the different
register values to the memory address like D:08H so that values are been stored into that
particular location

10. 19BEC0858
SHAHUKARI CHETAN
QUESTION – 05
Write a program to transfer a string of data from code space starting at address 200H to
RAM locations inside the CPU starting at 40H. The data is as shown below:
MYDATA: DB VIT University
Using the simulator, single-step through the program and examine the data transfer and
registers
PROGRAM:-
ORG 0000H
MOV A,#00H
MOV DPTR,#200H
MOV R1,#0EH
MOV R0,#40H
LOOP:CLR A
MOVC A,@A+DPTR
MOV @R0,A
INC DPTR
INC R0
DJNZ R1,LOOP
HERE:SJMP HERE
ORG 200H
DB ‘VIT UNIVERSITY’
END

11. 19BEC0858
SHAHUKARI CHETAN
RESULT STORE IN ROM:-

12. 19BEC0858
SHAHUKARI CHETAN
RESULT STORE IN RAM:-
OBSERVATION:-
By this we are able to store the transfer the data using register from Code space to RAM
location 40H.

13. 19BEC0858
SHAHUKARI CHETAN
QUESTION – 06
Add the following subroutine to the program 1, single-step through the subroutine and
examine the RAM locations. After data has been transferred from ROM space into RAM,
the subroutine should copy the data from RAM locations starting at 40H to RAM locations
starting at 60H.
PROGRAM:-
ORG 000H
MOV DPTR,#200H
MOV R0,#40H
MOV R1,#0EH
LOOP:CLR A
MOVC A,@A+DPTR
MOV @R0,A
INC R0
INC DPTR
DJNZ R1,LOOP
MOV R0,#40H ;R0 =40
MOV R1,#60H ;R1 =60
MOV R3,#0EH ; R3 =14D
LOOP2:CLR A
MOV A,@R0
MOV @R1,A
INC R0
INC R1
DJNZ R3,LOOP2
HERE:SJMP HERE
ORG 200H
DB ‘VIT UNIVERSITY’
END

14. 19BEC0858
SHAHUKARI CHETAN
RESULT:-
RESULT’S STORED IN ROM:-

15. 19BEC0858
SHAHUKARI CHETAN
RESULT’S STORED IN RAM:-
OBSERVATION:-
Using the above code, we are able to transfer the data from one Ram location to anothe

16. 19BEC0858
SHAHUKARI CHETAN
QUESTION -07
Write a program to add two multi-byte BCD numbers together and store the result in RAM
locations 40H - 44H. The two multi-byte items are stored in the ROM space starting at 120H
and 150H. See the following example data. ORG 120H DATA_1: DB
54H,76H,65H,98H;number 98657654H ORG 150H DATA_2 DB 93H,56H,77H,38H;number
38775693H Pick your own data for your program. Notice that you must first bring the data
from ROM space into the CPU's RAM and then add them together. Use a simulator to single-
step the program and examine the data.
PROGRAM:-
ORG 0000H
MOV DPTR,#120H
MOV R4,#05H
MOV R0,#40H
MOV R3,#00H
LOOP: CLR A
MOVC A,@A+DPTR
MOV R3,A
MOV A,#30H
MOVC A,@A+DPTR
ADD A,R3
DAA
MOV @R0,A
INC R0
INC DPTR
DJNZ R4,LOOP
HERE:SJMP HERE
ORG 120H
DB 54H,76H,65H,98H
ORG 150H
DB 93H,56H,97H,38H
END

17. 19BEC0858
SHAHUKARI CHETAN
RESULT:-

18. 19BEC0858
SHAHUKARI CHETAN
OBSERVATION:-
In this we used to store the 4 bytes number in 120H in ROM and another 4 bytes number into
150H in ROM and by using “add” command we used to store the add values into RAM from
the 40th location without the carry values.
QUESTION -08
Write a program to calculate y where y = x 2 + 2x + 9. x is between 0 and 9 and the look-up
table for x 2 is located at the address (code space) of 200H. Register R0 has the x, and at the
end of the program R2 should have y. Use the simulator to change the x value and single-step
through the program, examining the registers as you go.
PROGRAM:-
ORG 000H
MOV DPTR,#200H
MOV A,#03H;x=3
MOV R1,A ;R1=03
MOV R0,A;R0=03
ADDC A,R1; 2x
MOV R1,A ; R1<=2X
MOV A,R0 ;A=03
MOVC A,@A+DPTR
ADDC A,#09H
ADDC A,R1
MOV R2,A
HERE: SJMP HERE
ORG 200H
DB 00H,01H,04H,09H,10H,19H,24H,31H,40H,51H
END

19. 19BEC0858
SHAHUKARI CHETAN
RESULT:-

20. 19BEC0858
SHAHUKARI CHETAN
OBSERVATION:-
At first accumulator will be cleared the the accumulator value will be stored with the
hexadecimal values then these hexadecimal values will moved to the equation .
In this code we used to store the values of the squared numbers in the hexadecimal form in the
200th location of the ROM and then we used to implement the values into the algebra equation
y = x^2 + 2x + 9 and we used to get the final output after values passed into the equation.
QUESTION – 09
Write a program to convert Hex to Decimal, and then to ASCII. For example, if the hex
data is FBH, which is equal to 251 in decimal, after conversion we will have 32H, 35H, and
31H. Place the ASCII result in RAM locations starting at 40H. Using a simulator, single-
step the program and examine the data.
PROGRAM:-
ORG 0000H
MOV A,#0FBH
MOV R0,#40H
LOOP:MOV B,#10
DIV AB
XCH A,B; we are collecting the reminder
ADD A,#30H; For ASCII Conversion we have to add 30
MOV @R0,A
XCH A,B ; Taking the quo in A reg
INC R0
JNZ LOOP
END

21. 19BEC0858
SHAHUKARI CHETAN
OBSERVATION:-
In this code we used to give the values into the A and R0 register and then we used to divide
the values and then i will convert into hexa-decimal and it will store in D:40H location
RESULT:-