Forces of Nature: Video of Destructive Rockslide

Overnight it was raining a lot in the central part of Switzerland. Additionally it is warming up so it adds water with all the snow melting in the higher areas. As a result, a dangerous rock- and mudslide went down today nearby in Moutathal, damaging bridges and power lines. A video records the destructive power of nature:

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The Return of the 3D Printed Flying Toaster!

Does everybody still know why in the ‘old’ days there was the need for running a ‘screen saver’ on the computer? With the modern LCD displays they lost their initial purpose.  After “3D Printed Classic Mac Apple Watch Charging Station” I’m doing more ‘good old days’ 3D printing. The ‘elder ones’ might remember the “After Dark” screen saver software for Apple Macintosh and Microsoft Windows machines. Yes, that was 1991! For me most famous and iconic theme were the “Flying Toasters”:

Flying Toasters

Flying Toasters

Now there is a 3D printed version 🙂

Flying Toaster SD Card Holder

Flying Toaster SD Card Holder

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openHAB RGB LED Light Cube with WS2812B and NXP Kinetis

From my earlier work to use the NXP Kinetis with openHAB (see “Controlling NXP Freedom Board RGB LED with openHAB and Raspberry Pi“) it was only a small step to control a 20x20x20 cm light cube with 256 Adafruit WS2812 NeoPixels:

Kinetis RGB Cube with openHAB

Kinetis RGB Cube with openHAB

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First NXP Kinetis SDK Release: SDK V2.0 with Online On-Demand Package Builder

There are plenty of different software packages available for microcontroller these days from all the silicon vendors. Finding a good software package is one challenge, getting what I really need is another one. Freescale is now part of NXP since December 2015, so this is probably the first release of the former Freescale part now as NXP: The NXP Kinetis SDK Version 2.0.

It comes with an interesting distribution way: instead of downloading huge packages with all-and-everything in it, I can build it ‘on demand’ online and get what I need, on demand from a web-based front end:

NXP Kinetis Expert with Kinetis SDK

NXP Kinetis Expert with Kinetis SDK

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Controlling NXP Freedom Board RGB LED with openHAB and Raspberry Pi

In “Blinky LED with openHAB on Raspberry Pi” I have used openHAB on a Raspberry Pi to control an LED attached to the Pi, and in “Controlling NXP Freedom Board RGB LED with openHAB and Raspberry Pi” I have explored how to connect a NXP Freedom Board over USB CDC to the Raspberry Pi. In this article I’m going to combine both: to control the LED on a NXP Freedom board remotely with openHAB on the Raspberry Pi.

ColorPicker with openHAB and FRDM-KL25Z

ColorPicker with openHAB and FRDM-KL25Z

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3D Printed Magical MUFG Capsule to Duplicate NXP Kinetis K20 Boards

Sometimes it is all about doing fun stuff: to carry and store the tinyK20 (NXP/Freescale Kinetis K20) boards needed for next course, I wanted to build something geeky: a MUFG capsule to store and duplicate Kinetis boards 🙂

MUFG Capsule with tinyK20

MUFG Capsule with tinyK20

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Show Floating Point Variable Bytes in Eclipse CDT

My preferred variable format in Eclipse is hexadecimal (see “Debugging Variables in Hexadecimal with Eclipse“). However, this does not work well with floating point variables:

Floating Point Variables in Eclipse Variables View

Floating Point Variables in Eclipse Variables View

The above view shows all variables having the value 0x0 (zero), but that’s actually not really true.

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Debug Multiple Boards with GDB at the Same Time

Many times it is very useful to debug multiple boards at the same time. For example if I’m debugging a communication stack between two boards: that way I can debug the protocol on both sides. Eclipse is a great framework which allows that. This post shows how to debug multiple boards (e.g. the NXP Freedom boards) in parallel from the same Eclipse IDE using GDB and the Segger J-Link:

Two NXP Freedom Boards debugged at the same time

Two NXP Freedom Boards debugged at the same time

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Ice Flowers

Image

Waiting in the cold in the early morning can have an aesthetic aspect:

Ice Flowers

Ice Flowers

When ice builds beautiful structures on glass we call it ‘Eis Blume‘ (‘Ice Flowers’). In the past this happened on the windows in unheated buildings. These days it is a rare species with all the heated building. This one is more like snow flakes building up nice structures. With the sun coming up in the background their beauty will be gone very soon….

Happy Icing .-)

Hardware Reset for ARM Cortex-M with Segger J-Link and Kinetis Design Studio

The reset and signal line of a microcontroller is probably the most important signal to a microcontroller. And if things go wrong, then a first thing to check is the reset line. So having control over reset is an important aspect for embedded development. You would think that if you download a program to a microcontroller, the debug probe would put the device into reset at the start with a short pulse like this:

Reset Signal in Logic Analyzer

Reset Signal in Logic Analyzer

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