August 30, 2011
Addition of natural numbers
Aim: Write a program to add first 10 natural number and store output at external memory 3020H.
Apparatus Used: Micro-controller kit.
Assumption: The first 10 natural numbers are 1, 2, 3……10. We have write a program to add this.
Algorithm:
Algorithm:
- Firstly clear the contents of accumulator.
- Load number of bytes (Counter) in Register R2.
- Initialize R0 as zero.
- Increment R0 to get first natural numbers.
- Now Add R0 to accumulator.
- Add till R2=0.
- Initialize memory location to store output.
- Store output at given location.
Program:
Description of used instruction:
MOV: Used for Load and Copy the Data. This copies a byte from the source location to destination.
INC: This instruction adds 1 to the register or memory location specified by the operand.
ADD: This adds the source byte to the accumulator and keeps result in accumulator.
DJNZ: In this instruction a byte is decremented, and if result is not zero it will jump to the target address.
MOVX: This instruction transfer data between external memory and register.
DPTR: This is Data Pointer. It is used for containing 16 bit data or memory address.
SJMP: Short Jump loop is used for indefinite loop within program.
Result:
Input: 1, 2,3,4,5,6,7,8,9,10
Output: 1+2+3+4+5+6+7+8+9+10=55 (37H) and it will store at external memory 3020H.
Procedure to look output:
· After ending (SJMP) the program, press Enter two times.
· You will get message “Welcome to ------KIT”.
· Press G and Provide initial address of program as in this program, starting address is 3000 H.
· Press Enter.
· After pressing Enter, You will get Message “Execution Completed”.
· Press Reset on micro-controller KIT.
· Press M and You will get Message “Enter Address”.
· Provide Address for Output as in this Program 3020H and Press Space and you get Output.
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