Category: Embedded Systems
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Network Triangles, Part 2
June 8, 2017 dougwithau Republished February 14, 2026 How does the switch know where to send your data? In part 1, I mentioned the Ethernet header. This is what it looks like. Destination MAC 6 bytes Source MAC 6 bytes Length 2 byte Data 46-1500 Bytes CRC 4 Bytes The statement was made that a switch only…
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Why Triangles are bad for your Network
June 8, 2017 dougwithau Republished February 14, 2026 You’re planning to work on the IoT, or doing a project with networks. Networks are awesome because they have emergent behavior. Let me tell you a story to show what I mean. This involves network infrastructure at the lowest, simplest layer. You’ll need to understand the situation. I…
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Clearing up TaskTurner questions
Originally published May 8, 2017 Republished June 20, 2024 Last of this series The code on GitHub Post 1 Role your own Operating System, Post 2, TaskTurner First Code, Post 3, The Basic Code is Working, Post 4, Building Tasks, Post 5, Lowering System Power and Timers. Inter Process Communications I was going to write all about it. Then Collin Walls posted a…
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Lowering the system power, and some thoughts on time.
Let’s think about the simple system with only one set of tasks. How long does it take to execute all the tasks in the list?
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Building tasks in the TaskTurner
What is a task? How big should a task be? How long should a task take?
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Task Turner part 2, the Basic Code is Working
Here is the TaskTurner source code, we will discuss it in the post.
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Free C coding standard
The Barr Group has released their Embedded C Coding Standard. For the low cost of an email address, you can get it for free, yes FREE!
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How I chose an RTOS, and you should do the same
Originally published May 24, 2017 Edited and reformatted to publish with a new WP Host, May 27, 2024. Email Header: To: DEV_GROUP_FIRMWARE, DEV_GROUP_SOFTWARE From: Doug@yourco.com Subject: Choosing an RTOS All, I need to clear the air about the RTOS we chose in yesterday’s group meeting. In a few paragraphs, you will understand the reasoning behind the…
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TaskTurner first code
Originally published April 27, 2017 dougwihau on this blog. Revised and republished on a new host, May 21, 2024. The first code https://github.com/EmbeddedApprentice/TaskTurner Given there is not a whole lot going on here, but let me point out a few things worth noticing. Still, a lot to do This is very basic. You get the idea…
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Roll your own operating system
No Operating System? There is always something.