Hello guys! Today we will see how to find number of ones and zeros in a 32 bit number. Let’s first understand the algorithm later we see a example code. Algorithm: Start Store a 32 bit number in register(Rd). Initialize a counter register to 1Fh(32) Initialize one regiter(Ra) to zero to store number of ones, […]

## 8051 code find sum of first N natural numbers

Hello, guys! Today we will see 8051 assembly program to find the sum of first N natural numbers. There are two ways to compute the sum of N natural numbers. We will go through one by one. First method: It’s simple basic code. Let’s go through the algorithm. Algorithm: Start Store the value(N) up to which sum has […]

## 8051 program to convert Ascii value to Hexadecimal value….

Hi guys…In this article let’s learn conversion.The ascii to Hex conversion logic is very simple.The hexadecimal numbers from 31H-39H are 0-9 numbers in ascii and 41H to 46H are A to F numbers. So we should first compare the number with 40H if it is lesser subtract with 30H and it is greater subtract with […]

## Introduction of classes and objects in java.Program to take the input as student name,roll number and display in different class.

Hi guys in this article let’s learn about class.You might be thinking that you use class in every single program but don’t know what is class so let’s start.Hope you’ll enjoy it 🙂 Class is the core of Java.Each every single thing in java is referred as object and class. To understand the concept of […]

## 8051 itimer interrupt program to display value of 'Y' at P0 and 'n' at P2. Also generate square wave of 10 KHz at P2^0 with timer0 in interrupt mode.Using XTAL@22MHz

I have explained the calculations for the timer in my previous post.please have a look . CODE:

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#include<REGx51.h> sbit sqwave=P2^0; void timer0() interrupt 1 { sqwave=~sqwave; //generating sq wave } void main() { TMOD=0x02; //Timer0 in 8 bit autoreload mode IE=0x82; //enabling intrupt TH0=0x47; //loading the calculated value TR0=1; //starting timer while(1) { P0='y'; P2='n'; } } |

## 8051 timer Interrupt program to copy data from P0 to P1 ,while simultaneously generating square wave of time period 200 uS at P2^0 .

When it comes to interrupt programming , we have to consider some important registers. For this program the registers used are IE(interrupt enable),TCON(timer control),TMOD(timer mode). In timer interrupt programming calculating the value to be loaded to the timer is very important. Here XTAL frequency i have considered is 11.0592 MHz.If you are using […]

## Difference between static and non-static methods in java

In this article let’s learn how static and non-static methods are used in a program.Usually when we want to access class members we create the object of the class and then access through the object as reference.There is another way to do this without creating the object(accessing directly by class name) i.e by using the […]

## 8051 Interrupts: Basics | Types | Programs |Timer interrupts | AT89C51

8051 Interrupts An Interrupt is an external or internal event that halts or interrupts Microcontroller to inform it that a device needs its service. Contents: 1. Basics.2. Steps taken when interrupt occurs. 1. Basics : A microcontroller is able to give service to many Input and Output devices connected to it. […]

## Java program to find the sum of principal and secondary diagonal elements.

In this article let’s learn how to find the sum of principle diagonal elements and secondary diagonal elements. Principal diagonal elements are those which start at the top leftmost element of matrix and end at the bottom rightmost element of a matrix. Secondary diagonal elements are vice-versa. Eg: If A is the matrix of order […]

## 8051 Program to Rotate DPTR value

Output 8051 Program to Rotate DPTR Value. ALGORITHM: Start. Load the value to be rotated in DPTR. Move the Lower nibble of DPTR in Accumulator. Rotate Left 8 bits along with carry. Move the Upper nibble of DPTR in Accumulator. Rotate Left 8 bits along with carry. Now we got the Upper nibble of DPTR […]