Serial Programming Guide for POSIX Operating Systems

Serial Programming Guide for POSIX Operating Systems

5th Edition
Michael R. Sweet
Copyright 1994-1999, All Rights Reserved.


Introduction

Chapter 1, Basics of Serial Communications

Chapter 2, Configuring the Serial Port
Chapter 3, MODEM Communications
Chapter 4, Advanced Serial Programming
Appendix A, Pinouts
Appendix B, ASCII Control Codes


The Serial Programming Guide for POSIX Operating Systems will teach
you how to successfully, efficiently, and portably program the serial
ports on your UNIX® workstation or PC. Each chapter provides
programming examples that use the POSIX (Portable Standard for UNIX)
terminal control functions and should work with very few modifications
under IRIX®, HP-UX, SunOS®, Solaris®, Digital UNIX®, Linux®, and most
other UNIX operating systems. The biggest difference between operating
systems that you will find is the filenames used for serial port device
and lock files.

This guide is organized into the following chapters and appendices:


This chapter introduces serial communications, RS-232 and other

Read More

Structured Streaming Programming Guide – Spark 2.4.5 Documentation

Structured Streaming is a scalable and fault-tolerant stream processing engine built on the Spark SQL engine. You can express your streaming computation the same way you would express a batch computation on static data. The Spark SQL engine will take care of running it incrementally and continuously and updating the final result as streaming data continues to arrive. You can use the Dataset/DataFrame API in Scala, Java, Python or R to express streaming aggregations, event-time windows, stream-to-batch joins, etc. The computation is executed on the same optimized Spark SQL engine. Finally, the system ensures end-to-end exactly-once fault-tolerance guarantees through checkpointing and Write-Ahead Logs. In short, Structured Streaming provides fast, scalable, fault-tolerant, end-to-end exactly-once stream processing without the user having to reason about streaming.

Internally, by default, Structured Streaming queries are processed using a micro-batch processing engine, which processes data streams as a series of small batch jobs thereby achieving end-to-end

Read More

Internet Addiction Guide | Psych Central

Researchers still can’t tell you exactly what Internet Addiction Disorder is, also know by the term “Pathological Internet Use” (PIU). Much of the original research was based upon the weakest type of research methodology, namely exploratory surveys with no clear hypothesis, agreed-upon definition of the term, or theoretical conceptualization. Coming from an atheoretical approach has some benefits, but also is not typically recognized as being a strong way to approach a new disorder. More recent research has expanded upon the original surveys and anecdotal case study reports. However, as I will illustrate below later, even these studies don’t support the conclusions the authors claim.

The original research into this disorder began with exploratory surveys, which cannot establish causal relationships between specific behaviors and their cause. While surveys can help establish descriptions of how people feel about themselves and their behaviors, they cannot draw conclusions about whether a specific technology, such … Read More

Best Computer Buying Guide – Consumer Reports

Speed matters. Processors with multiple cores can process more data simultaneously, with four cores now increasingly common on laptops. Our ratings say how many cores a laptop’s processor has.

Clock speed, measured in gigahertz (GHz), along with the number of cores and other factors, determines how quickly a processor can process information. Many processors can up the speed a bit for a brief time to yield maximum performance. Generally, within a processor family, the higher the clock speed, the faster the processor. Clock speeds typically start at around 1 GHz for a mobile processor. Speeds can exceed 5 GHz for a desktop processor.

Power Consumption
Another important factor when choosing a processor, especially for laptops: Lower power consumption equals longer battery life.

If you’re looking for a very basic or budget computer to browse the web, email, and work on Office documents, basically every processor on the market should be

Read More

What is Blockchain Technology? A Step-by-Step Guide For Beginners

The blockchain is an undeniably ingenious invention – the brainchild of a person or group of people known by the pseudonym, Satoshi Nakamoto. But since then, it has evolved into something greater, and the main question every single person is asking is: What is Blockchain?

Is Blockchain Technology the New Internet?

By allowing digital information to be distributed but not copied, blockchain technology created the backbone of a new type of internet. Originally devised for the digital currency, Bitcoin blockchain, (Buy Bitcoin) the tech community has now found other potential uses for the technology.

In this guide, we are going to explain to you what the blockchain technology is, and what its properties are what make it so unique. So, we hope you enjoy this, What Is Blockchain Guide. And if you already know what blockchain is and want to become a blockchain developer

Read More

The Beginners Guide to Online Marketing

The most extensive and comprehensive introduction to online marketing that you’ll find anywhere.

  • Why We Wrote this Guide? Online marketing moves at the speed of light. To keep up, you need a strong foundation with the judgment to think critically, act independently, and be relentlessly creative. That’s why we wrote this guide — to empower you with the mental building blocks to stay ahead in an aggressive industry.There are plenty of guides to marketing. From textbooks to online video tutorials, you can really take your pick. But, we felt that there was something missing — a guide that really starts at the beginning to equip already-intelligent professionals with a healthy balance of strategic and tactical advice. The Beginner’s Guide to Online Marketing closes that gap.
  • Who This Guide Is for? We wrote this guide for an audience of first-time marketers, experienced entrepreneurs and small business
Read More

Architectural Programming | WBDG – Whole Building Design Guide

Introduction

Architectural programming began when architecture began. Structures have always been based on programs: decisions were made, something was designed, built and occupied. In a way, archaeologists excavate buildings to try to determine their programs.

Today, we define architectural programming as the research and decision-making process that identifies the scope of work to be designed. Synonyms include “facility programming,” “functional and operational requirements,” and “scoping.” In the early 1960s, William Peña, John Focke, and Bill Caudill of Caudill, Rowlett, and Scott (CRS) developed a process for organizing programming efforts. Their work was documented in Problem Seeking, the text that guided many architects and clients who sought to identify the scope of a design problem prior to beginning the design, which is intended to solve the problem.

In the 1980s and 1990s, some architectural schools began to drop architectural programming from their curricula. The emphasis of the Post-Modern and Deconstruction

Read More

Guide to Programming Languages | ComputerScience.org

What are Computer Programming Languages?

Computer programming languages allow us to give instructions to a computer in a language the computer
understands. Just as many human-based languages exist, there are an array of computer programming
languages that programmers can use to communicate with a computer. The portion of the language that a
computer can understand is called a “binary.” Translating programming language into binary
is known as “compiling.” Each language, from C Language to Python, has its own distinct
features, though many times there are commonalities between programming languages.

These languages allow computers to quickly and efficiently process large and complex swaths of
information. For example, if a person is given a list of randomized numbers ranging from one to ten
thousand and is asked to place them in ascending order, chances are that it will take a sizable amount
of time and include some errors.

There are dozens of

Read More