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Introduction to Rate Monotonic Scheduling

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If you've got a lot of real-time tasks and tight deadlines, what's the best way to prioritize them? A technique called RMA guides the way.

Mutexes and Semaphores Demystified

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The question "What is the difference between a mutex and a semaphore?" is short and easily phrased.  Answering it is more difficult.  In this first installment of a series of articles on the proper use of a real-time operating system (RTOS), we examine the important differences between a mutex and a semaphore.

Bug-Killing Coding Standard Rules for Embedded C

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A C coding standard can help keep bugs out of embedded software by leveraging common language features and development tools.

More Bug-Killing Coding Standards for Embedded C

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This second article on enforceable coding standards for embedded systems adds a set of additional bug-killing rules for using certain C keywords and naming global variables.

2016 Embedded Systems Safety & Security Survey

Barr Group's 2016 Embedded Systems Safety & Security Survey had participation from more than 2,500 embedded systems design engineers and revealed a number of interesting trends in the embedded industry. In this webinar, Barr Group executives Michael Barr (CTO) and Andrew Girson (CEO) discussed some of the most interesting findings.

Killer Apps: Embedded Software's Greatest Hit Jobs

Between 1985 and 1987, there were at least 6 distinct accidents where the Therac-25 radiation therapy machine delivered up to 100 times the prescribed radiation dose, resulting in injury and death. These high-profile accidents demonstrated that embedded software can be dangerous, even lethal. In the decades since, and despite increasing regulation, safety-critical system failures have continued to kill people.

As embedded software's size and complexity continue to rapidly progress, user safety increasingly relies upon safe and reliable firmware implementations. Nowhere is this more evident than in the automotive industry, where self-driving vehicles are a much-hyped and potentially invaluable part of our future.

Barr Group co-founder and CTO Michael Barr presents an engaging discussion of the past, present, and future of embedded software safety. 

The Perils of Preemptive Multitasking

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Every commercial RTOS employs a priority-based preemptive scheduler. This despite the fact that real-time systems vary in their requirements and real-time scheduling doesn't have to be so uniform. Multitasking and meeting deadlines is certainly not a one-size-fits-all problem.

Portable Fixed-Width Integers in C

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For embedded software developers, the most significant improvements to the C programming language made in the ISO C99 standard update are in the new <stdint.h> header file. Learn the typedef names for the new fixed width integer data types, to make hardware interfacing in C easier. And there are other benefits as well

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