At dinner on Sunday, an old friend and I were discussing recent issues and anomlies we’e encountered with the I2C bus.
I’ve made a note of them on my blog to help familiarize others with some of the more abstract and uncommon issues on I2C buses. … More Three, new to me, I2C issues!
Making time to learn while on the job is sometimes hard to justify. Not making time to learn is hard to defend.
There are two software tools I use frequently, but I know I am barely utilizing them to their full potential. I get good information from them to analyze problems and validate solutions. However, I know there is an additional level of capability that I haven’t had a chance to explore.
I’m making time to learn them better. Knowing my tools will help me speed up my debug efforts, and help me profile system performance. … More Slowing Down to Learn
A brief intro to the repo of examples associated with this blog. … More Glorified Plumbing – The Repo!
This is an adventure in debugging.
I recently encountered a bug in a very simple walking-ones test. It was near the end of the data, so it looked like an off-by-one bug; closer inspection told me otherwise. … More What feels like an off-by-one-bug, but isn’t?
The debug UART port is a critical tool in embedded systems for testing and monitoring. It relies on a solid serial connection for reliable operation. Implementing this port using a UART for serial communications is common, but it comes with challenges like TX/RX reversal and physical fitting issues. Using best practices can help ensure a reliable and effective debug UART port. … More The Perfect Debug UART port
A quick note on the evolution of the word `dongle`. … More Dongle – an example that English is a living language
There is a disturbing trend I see in other people’s code. One that can cause glitches on data lines. Most of the time, nothing goes badly wrong, but once in a while you will introduce terrible side effects. … More GPIO and Random Edges!
The author reflects on three photos taken from the same spot, each capturing unique aspects of the surroundings. This prompts contemplation on perspective, bias, and perception, relating to both photography and embedded software development. The essay underscores the value of diverse knowledge and the need for alternative viewpoints in problem-solving. The location, Alameda Naval Air Station, is also described. … More It’s all a matter of perspective
A common debugging problem I have been wanting to write about happened during the course of my work today. I grabbed a few screen captures from my oscilloscope to share with you.
Serial Monitor and debug print statements. Why do the old timers tut-tut when you use them in embedded code? … More About that `printf()`
Today’s blog post discusses the use of a GPIO test point for debugging embedded systems. It explains the benefits of a dedicated GPIO test point, the selection criteria for the GPIO pin, and tips for placing and manipulating the test point. The post also emphasizes the importance of using a GPIO pin over a debugger and a terminal for system monitoring. … More GPIO test point
Glorified Plumbing 