MICROPROCESSOR AND MICROCONTROLLER

Cross Compilation - sunxi-tools

2026-09-21T12:41:26.346+05:30

In order to reuse or change a bit of stuff in my allwinner soc i am on quest to have its linux tools cross compiled. Most of the tools have cross compilation features but somehow doesnt work or has a missing library dependency. This is to document what those dependency are and how to get it to work.Deconstructing the Makefile RequirementsInspecting the sunxi-tools Makefile reveals three

LabView - Decision Making with Case Structure

2025-08-28T05:00:00.002+05:30

The post talks about using the case structure in the labview VI programming. Case structure using lab view Operation: For ring constant = 0 i.e. case 0 x – y i.e. input 1- input 2= result For ring constant = 1 i.e. case 1 x + y i.e. input 1+ input 2= result For ring constant = 2 i.e. case 2 i.e. y-x i.e. input 1- input 1= result Algorithm: Create a case structure on the

LabView - Create a Sub VI

2025-08-27T05:00:00.002+05:30

The posts talks about how to create and use a sub vi. Create a Sub VI The first step in creating a Sub VI is to modify it's icon so that it can be recognized when it is used in an upper-level VI. Every VI has a default icon in the upper-right corner of both the Front Panel and the Block Diagram. Default VI Icon in VI Window In order to customize the icon, pop-up on it's >Edit

LabView - Iterative Data Transfer Using For loop, While loop and Shift Register

2025-08-26T05:00:00.003+05:30

The post talks about making loops and shift register in the LabView. For Loop Using LabView For Loop Using Labview The For Loop is located on the Functions>>All Functions>>Structures palette. The value in the count terminal (an input terminal), indicates how many times to repeat the sub diagram. The iteration terminal (an output terminal), contains the number of

LabView - Developing VI for Simple Applications

2025-08-25T05:00:00.001+05:30

Developing basic application with Labview Application and getting virtual instrument. Arithmetic operations using Lab View Lets implement the arithmetic operations using Lab view Operation: For addition; X+Y= Result For subtraction; X-Y= Result For Multiplication; X*Y= Result For division; X/Y= Result Algorithm: Step1: create two controls X and Y on the input panel. Step2: create

Programmable Logic Controller - Problems with Solutions (Beginner Friendly)

2025-08-24T05:00:00.003+05:30

If you are an engineering student or an automation enthusiast looking to learn PLC ladder logic programming, this guide will walk you through real-world examples. We’ll go step by step, starting with simple control mechanisms and then moving toward tank filling automation using sensors. By the end, you’ll understand how ladder diagrams are applied in industrial automation systems. What is PLC

Programmable Logic Controller - Program Control Instruction(MCR)

2025-08-23T05:00:00.003+05:30

An MCR zone in PLC programming refers to the section of ladder logic that is bracketed by two Master Control Reset (MCR) instructions—one to start the zone and one to end it. This zone allows you to control the execution of all rungs within it as a block, giving you the ability to enable or disable their outputs based on the condition set by the first MCR instruction Setting up MCR zone First

Programmable Logic Controller - Lets Solve a Sequential Problem

2025-08-22T05:00:00.003+05:30

Lets try and solve a sequential problem in this blog post. Example of a Sequential Process In the process shown in figure we want to fill the two tanks with water using a pump. Prepare Ladder logic program to implement the following sequential control application. Start/Stop push buttons controls On/Off of the Pump. Valve 1 alone will be kept open till the tank 1 gets filled or for a

Programmable Logic Controller - Up Down Counter in PLC

2025-08-21T05:00:00.003+05:30

Another key aspect in the PLC programming is the concept of the up down counter. This post covers the basics of it. Setting up a Counter Setting up a counter The above procedure calls a Up-Down counter C002 with a present value for 10 counts Counting cement bags A motor driven conveyor belt carries cement bags. Every time a start push button is pressed, run the conveyor to deliver 10 cement

Programmable Logic Controller - Creating Timer Application in PLC

2025-08-20T05:00:00.003+05:30

The timers are key part of any programming logic. The post here describes how to set it up with a PLC IDe. These were the experiments and records i did as a student. Posting it here as a blog content. Calling a Timer Setting up a timer The above example calls the timer T001 and programs time delay of 5 sec. Now with the above setting lets develop a Ladder Logic to implement a On-delay and a

Programmable Logic Controller - Latch Application in PLC

2025-08-19T05:00:00.006+05:30

The latch application, meaning latching of push button outputs are one of the most common use cases of the PLC Application. The following experiments demonstrates how that is implemented. These were the experiments and records i did as a student. Posting it here as a blog content.Variation - 1 Most of the Industries use push buttons to start and stop some devices. In a logical case, when the push

Programmable Logic Controller - Introduction/Simple Logical Experiments

2025-08-18T05:00:00.003+05:30

Following series of posts capture experiements done with the keyence logic builder to make programs for the Programmable Logic Controller devices. These are pretty basic experiments and anyone can follow it along. These were the experiments and records i did as a student. Posting it here as a blog content. Keyence Ladder Builder:KV Ladder Builder can simulate program execution even without a PLC

Demystifying the Finite Element Method: A Very Simple Truss Stiffness Matrix in Python

2025-08-02T23:53:00.002+05:30

I dont recall how long ago i worked on FEM methods but found this basic program of stiffness matrix calculation in one of my older hard drive. So why go it to waste here is a brief blog on how FEM, a numerical technique can be approached. This technique breaks down a complex structure into smaller, simpler pieces called "finite elements." By analyzing these small elements and then

Parsing an XML File in Java with SAX Parser

2025-08-01T23:37:00.004+05:30

Parsing XML files is a common task in Java development, and a SAX parser is a popular choice for this purpose. The SAX parser is known for being faster and using less memory compared to the DOM parser. This is because the SAX parser doesn't load the entire XML document into memory or create an object representation of it. Instead, it uses callback functions to inform clients about the XML

Python Interview Prep - Part 2

2025-07-13T18:51:00.003+05:30

This is second part of my notes for the python interview prep. Was valid in python27 capturing here for future reference. Table of Contents What is bytecode? How to check memory address of a variable in python? How to iterate over indices and list? What is Classmethod? What is Staticmethod? What is docstring? What is map? Difference between shallow copy and deep copy?

Python Interview Prep - Part 1

2025-07-07T00:19:00.003+05:30

The post holds my old notes and questions that have been asked during the era of python2.7. This is my interview prep guide. Table of Contents What is python? What is the purpose of PYTHONSTARTUP environment variable? Is python a case sensitive language? What are 5 standard data types in python? What is PEP8? What is pickling and unpickling? How memory is managed in Python?

Learning Docker via Practical Apps - Containerize MySQL and Phpmyadmin

2025-05-20T00:26:00.001+05:30

For developers working with databases, the combination of MySQL, a robust open-source relational database, and phpMyAdmin, a user-friendly web-based database administration tool, is a staple. This powerful duo becomes even more potent when containerized with Docker.This comprehensive guide will walk you through the process of setting up and running both MySQL and phpMyAdmin within separate yet

A Deep Dive into a C-Based Encryption Tool

2025-04-26T01:12:00.014+05:30

In today's digital age, where data breaches and privacy concerns are rampant, understanding the fundamentals of encryption is more crucial than ever. This post delves into a powerful, albeit simplified, C-based encryption tool. We'll explore its inner workings, dissect the code, and understand the cryptographic principles that make it tick. Whether you're a seasoned developer or a curious tech

How to Build a Biometric Authentication System in Python Using the Windows Biometric Framework

2025-04-25T00:54:00.003+05:30

Biometric authentication is no longer limited to high-security labs or science fiction movies. With the rise of facial recognition and fingerprint scanning, developers now have the tools to implement biometric login systems in their own applications. In this tutorial, we’ll show you how to build a Python-based biometric authentication system using the Windows Biometric Framework (WBF).Whether

MARS MIPS - A Program to echo output from the Keyboard

2023-02-19T23:43:00.003+05:30

IntroductionThe aim to write a program that demonstrates the use of peripheral devices like keyboard. The program should echo what is being getting typed in the keyboard. The post describes the code that generates the output shown in the video.This is me practicing basic stuff to be done in the MIPS assembly language program. Code Section 1 2 3 4 5 6 7

MARS MIPS - A Program to move a block of object

2023-02-14T18:27:00.005+05:30

IntroductionThis program draws a series of adjacent rectangles of different colors and positions on a 512x256 pixel display with a base address of 0x10010000 in memory. The program starts by defining two colors, 'color' (red) and 'black' and a block of memory 'frameBuffer' to hold the pixel data for the display. Then, a series of adjacent rectangles is drawn by calling the 'rectangle' function

Write a python program to search for a file in a provided directory

2022-05-03T04:02:00.008+05:30

So i had to for some reason develop a small utility to search a directory or drive for a particular filename. Decided to do the same in python to try and explore the os.walk() in python.Here is how i did the same.Starting with the InterfaceSo for this particular demonstration decided to have a command line interface that takes in 2 parameters-f --filename - This is where the filename to be

Embedded System Podcast - Episode 11 - Version Control

2021-03-28T02:28:00.001+05:30

Embedded System and Design · Episode - 11 - Version Control The Version Control Basics In the come back episode i try to remember the settings for the microphone :D. Try to give a brief introduction about the subversion version control. I also introduce my open source project WebSVN, a free repository viewer for subversion. Hosted on github where one can raise its issues and

Writing Pre-Commit Hook Scripts in Python for Subversion

2021-03-14T21:10:00.000+05:30

It is pretty simple to write hook scripts for subversion in python even without using the subversion library. Here in this post i show how i wrote a pre-commit hook script to tackle three of the requirements.Length of the commit message should not be less than 50 charactersThe log message should have the work item id written so the commit can be linked to the work items in the Rational

Embedded System Podcast - Episode - 10 Commit Log Policing

2020-08-24T00:16:00.001+05:30

One or the other time there is always something, some first thing that you do in your career. That you have seen all the time but never have done yourself before. That is what i am going to talk about today. It is called commit Log policing.You are going to do this daily if you are the repository admin or responsible for entire code. But there will always be the very first time you are going