8051 Microcontroller


8051 Microcontroller Programming Lab Experiments
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Cycle 1 (2016-17) :

1. write a program to perform multiplication and division operation.

2. write a program to find product of two numbers using repeated addition.

3. Write a program to find the sum of first ten decimal numbers.

4. Write a program to swap the given 8-bit number using rotate instruction.

5. Write a program to copy a set of data from one location to another.

6. Write a program to exchange two set of data.

7. Write program to find the largest from a set of n numbers.

8. Write program to find the smallest from a set of n numbers.

9. Write a program to sort a set of numbers in ascending order.

10.Write a program to sort a set of numbers in descending order.

 CYCLE II

 11. Write a program to toggle the LEDs connected to P2.

 12. Write a program to display a number (5) using a 7 segment display.

 13. Write a program to display the hexadecimal numbers using 7 seg display continuously.

 14. Write a program to read the input set using DIP switch and to display the same using 7 segment.

 15. Write a program to display your name using LCD display.

 16. Write a program to generate a square wave.

 17. Write a program to generate a sawtooth wave.

 18. Write a program to rotate the given motor in clock-wise direction.

 19. Write a program to rotate the motor in anti-clock wise direction.

 CYCLE III

 20. Write a program using embedded C in Kiel to blink a LED connected to P1.2.

 21. Write a program in embedded C using Kiel to toggle the pins in P0.

 22. Write a program in embedded C using Kiel to display 0-9 on seven segment display.

 23. Write a program in embedded C using Kiel to create a delay of 500msec and to blink a LED accordingly.
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 CYCLE 1:  EXPERIMENTS ON ASSEMBLY PROGRAMMING

   1.      Write a program to perform  multiplication and division operations.
   2.      Write a program to transfer a block of data from internal memory to external memory.
   3.      Write a program to exchange two set of data.
   4.      Write a program to find the sum of two numbers in decimal?
   5.      Write a program to convert decimal number to hexadecimal.
   6.      Write a program to add a number n, m number of times.
   7.   Write program to find the largest from a set of n numbers.
8.      Write program to count the number of occurrence of a number in a block of numbers
9.      Write program to perform swap and exchange operations.
10.   Write a program to sort a set of numbers in ascending order?
 11.   Write a program to sort a set of numbers in descending order?

CYCLE 2: EXPERIMENTS ON 8051 INTERFACING

  1. Write an assembly language program for generating a triangular wave?
  2. Write program to toggle port bits.
  3. Write a program to find the largest from a set of ten numbers and display it using LEDs.
  4. Write a program to for displaying the decimal numbers in  7 Segment display?
  5. Write a program to read the DIP switches for displaying the reading using 7 Segment display.
  6. Write a program to rotate the given motor in clockwise direction?
  7. Write a program to rotate the given motor in anticlockwise direction?
  8. Write a program to generate a square wave?
  9. Write a program to display a message in LCD display.
  10. Write a program to Interface ADC with 8051 and to read voltage values.
  11. Write a program to generate a frequency of 10khz using interrupts on Px.i

CYCLE 3: EXPERIMENTS ON 8051 PROGRAMMING IN C USING KEIL

  1. Write program  for toggling the LEDs connected to a Port Px
  2. Write program for generating a square/triangular wave?
  3. Write a program display a hexadecimal digit using LEDs.
  4. Write a program that sequentially displays the decimal numbers using  7 segment.
  5. Write a program to create a delay of 5ms using 8051 Timers.
  6. Write a program to read an input through DIP switch and display the reading using LED or 7-segment.
  7. Write a program to rotate the given motor in?

Note: A minimum of 22 experiments; 8 from cycle 1, 6 from cycle 2 and 5 from cycle 3 is to be carried out compulsorily.


SOLVED QUESTIONS

 1.   ADDITION 

MOV A,#00H
MOV R0,#0AH
GO:ADD A,#05H
DJNZ R0,GO
MOV R1,A
END

2.   BLOCK DATA TRANSFER

MOV RO,#20H
MOV R1,#010H
MOV R1,#040H
LOC:MOV A,@R0
MOV @R1,A
INC R0
INC R1
DJNZ R3,LOC
END

3.   ADDITION OF FIRST TEN NATURAL NUMBERS

MOV A,#0AH
MOV R0,0AH
CLR A
LOOP:ADD A,RO
DJNZ R0,LOOP
MOV 046H,A
END

4.  MULTIPLICATION AND DIVISON

MOV R0,#020H
MOV A,@R0
INC R0
MOV 0F0H,@RO
MUL AB
MOV R1,A
CLR A
INC R0
MOV A,@R0
INC R0
MOV 0F0H,@R0
DIV AB
MOV R5,A
END

5.     LARGEST OF BLOCK OF DATA

MOV R0,#020H
MOV R1,#0AH
MOV 0F0H,#00H
LOC3:MOV A,@R0
CJNE A,OFOH,LOC2
LOC2:JC  LOC1
MOV 0F0H,A
LOC1:INC RO
DJNZ R1,LOC3
MOV A,0F0H
END

6.     SMALLEST OF BLOCK OF DATA

MOV R0,#0AH
MOV R1,#30H
MOV 0F0H,@R1
L2:MOV A,@R1
CJNE A,0F0H,L1
L1:JC,L4
INC R1
DJNZ R0,L2
SJMP L3
L4:MOV 0F0H,A
INC R1
DJNZ R0,L2
L3:MOV 60H,0F0H
END

7.    ASCENDING ORDER

MOV R1,#09H
START:MOV R2,#09H
MOV R0,#020H
MOV A,#00H
BACK: MOV A,@R0
INC R0
MOV 0F0H,@R0
CJNE A,0F0H,LOC1
SJMP LOC3
LOC1:JNC,LOC2
SJMP LOC3
LOC2:DEC R0
MOV @R0,OFOH
INC R0
MOV @R0,A
LOC3:DJNZ R2,BACK
DJNZ R1,START
END

8.     DESCENDING ORDER


MOV R1,#09H
START:MOV R2,#09H
MOV R0,#020H
MOV A,#00H
BACK: MOV A,@R0
INC R0
MOV 0F0H,@R0
CJNE A,0F0H,LOC1
SJMP LOC3
LOC1:JC,LOC2
SJMP LOC3
LOC2:DCC R0
MOV @R0,OFOH
INC R0
MOV @R0,A
LOC3:DJNZ R2,BACK
DJNZ R1,START
END

9.   MERGING TWO SET OF DATA

MOV R0,#020H
MOV R3,#0BH
MOV R1,#040H
LOC:MOV A,@R0
MOV @R1,A
INC R0
INC R1
DJNZ R3,LOC
CLR A
MOV RO,#030H
MOV R2,#0AH
MOV R1,#O4BH
L1:MOV A,@R0
MOV @R1,A
INC R0
INC R1
DJNZ R3,L1
END

10.   BLOCK DATA EXTANGE

MOV R3,#005H
MOV R1,#040H
MOV R0,#050H
L1:MOV A,@R1
XCH A,@R0
MOV @R1,A
INC R1
INCR0
DJNZ R3,L1
END

11.    TOGGLING PORT BITS

LOC:MOV A,#0AAH
MOV P2,A
ACALL DELAY
MOV A,#055H
MOV P2,A
ACALL DELAY
SJMP LOC
DELAY:MOV R3,#0FFH
BACK:MOV R4,#0FFH
AGAIN:DJNZ R4,AGAIN
DJNZ R3,BACK
RET
 END

12.       TRIANGULAR WAVE FORM

ORG OOH
AGAIN:MOV A,#00H
LOC:MOV P1,A
INC A
CJNE A,#0FFH,LOC
MOV P1,A
L1:DEC A
MOV P1,A
CJNE A,#00H,L1
SJMP AGAIN
END

13.     SQUARE WAVE FORM GENERATION

ORG OOH
AGAIN:MOV P1,#0FFH
ACALL DELAY
MOV P1,#OOH
ACALL DELAY
SJMP AGAIN
DELAY:MOV R3,#0FFH
HERE2:MOV R4,#OFFH
HERE:DJNZ R4,HERE
DJNZ R3,HERE2
RET
END

14.     STEPPER MOTOR CLOCK WISE ROTATION

                  ORG 00H 
    START:  SETB P1.0
                   SETB P1.1
                   SETB P1.2
                   CLR P1.3
                   ACALL DELAY
                   SETB P1.0
                   SETB P1.1
                   CLR P1.2
                   SETB P1.3
                  A CALL DELAY
                   SETB P1.0
                   CLR P1.1
                   SETB P1.2
                   SETB P1.3
                   ACALL DELAY
                   CLR P1.0
                   SETB P1.1
                   SETB P1.2
                   SETB P1.3
                   SJMP START
DELAY: MOV R3,#0FFH
   L1:     MOV R4,#0FFH
   L2:     DJNZ R4,L2
             DJNZ R3,L1
                   RET
                   END 
                   
15.   STEPPER MOTOR ANTI-CLOCK WISE ROTATION

              ORG 00H
START:  SETB P1.3
                   SETB P1.2
                   SETB P1.1
                   CLR P1.0
                   ACALL DELAY
                   SETB P1.3
                   SETB P1.2
                   CLR P1.1
                   SETB P1.0
                  A CALL DELAY
                   SETB P1.3
                   CLR P1.2
                   SETB P1.1
                   SETB P1.0
                   ACALL DELAY
                   CLR P1.3
                   SETB P1.2
                   SETB P1.1
                   SETB P1.0
                   SJMP START
DELAY: MOV R3,#0FFH
   L1:    MOV R4,#0FFH
   L2:    DJNZ R4,L2
            DJNZ R3,L1
                   RET
                   END

16.      DIP SWITCH

ORG 00H
HERE:MOV A, P2
MOV P1,A
SJMP HERE
END

17.      7 SEGMENT FOR DISPLAYING (0-9)

ORG 00H
MOV 80H,#0FFH
SETB 90H
START:MOV R0,#00AH
MOV DPTR,#200H
LOC:MOV A,#00H
MOV C,A@A+DPTR
MOV 80H,A
L CALL DELAY
LCALL DELAY
LCALL DELAY
LCALL DELAY
INC DPTR
DJNZ R0, LOC
SJMP START
ORG 200H
DB 3FH,06H,5BH,4FH,66H,6DH,7DH,67H,7FH,67H
DELAY:MOV R1,#0FFFH
HERE2:MOV R4,#0FFH
HERE:DJNZ R4,HERE
DJNZ R1,HERE2
RET
END

18. DISPLAY THE MESSAGE "BPC"

ORG 00H
MOV A,#38H
ACALL COMNDWRT
ACALL DELAY
MOV A,#0EH
ACALL COMNDWRT
ACALL DELAY
MOV A,#01H
ACALL COMNDWRT
ACALL DELAY
MOV A,#06H
ACALL COMNDWRT
ACALL DELAY
MOV A,#82H
ACALL COMNDWRT
ACALL DELAY
MOV A,#’B’
ACALL DATAWRT
ACALL DELAY
MOV A,#’P’
ACALL DATAWRT
ACALL DELAY
MOV A,#’C’
ACALL DATAWRT
MOV A,#01H
ACALL COMNDWRT
AGAIN:SJMP AGAIN
DATAWRT:MOV P1,A
SETB P3.0
CLR P3.1
SETB P3.2
CLR P3.2
RET
COMNDWRT:MOV P1,A
SETB P3.0
CLR P3.1
SETB P3.2
CLR P3.2
RET
DELAY:MOV R3,#0FFH
HERE2:MOV R4,#0FFH
HERE:DJNZ R4,HERE
DJNZ R3,HERE2
RET
END

19.    WAP IN C FOR LED BLINKING

#include<reg51.h>
soid delay(void);
sbit x=ox92;
void main(void)
{
for(;;)
{
x=0;
delay();
x=1;
delay();
}
}
void delay( )
{
unsigned int i,j,t=500;
for(i=0;i<500;i++)
{
for(j=0;j<t;j++)
{
}
}
}

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