OpenOCD with MCU-Link

The NXP MCU-Link is a powerful $10 debug probe for ARM Cortex-M devices and works with the NXP LinkServer for debugging. The LinkServer does not an implement a gdb server, so it limits its usage e.g. for scripting or command line debugging. But as MCU-Link is also a CMSIS-DAP compatible debug probe, I can use it with OpenOCD which is open source and implements a GDB server. This article shows how I can use it with the MCU-Link.

Debugging FRDM-KL25Z with MCU-Link

Debugging FRDM-KL25Z with MCU-Link

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Black Magic Open Source Debug Probe for ARM with Eclipse and GDB

The ‘Black Magic Probe’ (or in short: BMP) is a very small and open source JTAG/SWD debug probe with a build-in GDB Server. I saw that probe referenced in different places, so I thought I try it out with a few of my NXP LPC and Kinetis boards:

BMP with LPC and Kinetis Boards

BMP with LPC and Kinetis Boards

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DIY USB HID Joystick Device and Game Controller

For many projects it would be cool to build a custom USB Joystick device, either as custom game controller for Windows or any USB host which can be used with a USB Joystick. Instead buying one, why not build my version? All what I need is a USB capable board, some kind of input (potentiometer, push buttons) and some software, and I have my USB Joystick:

DIY USB HID Joystick Device

DIY USB HID Joystick Device

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Bricking and Recovering OpenSDA Boards in Windows 8 and 10

Getting a board from a distributor like Farnell/Element14/Mouser (add your own distributor) means that chances are high that the default firmware on it is written years from now because the inventory has not been updated, or because boards are still produced with that original firmware (because of testing?). So what happens if I use board with a firmware developed pre-Windows 8/10 area?

Freshly Unboxed NXP FRDM-KL25Z Board

Freshly Unboxed NXP FRDM-KL25Z Board

It might work, but chances are high that the bootloader and firmware is not ready for the ‘modern age’, and as a result the board might be bricked. If you still have a Windows 7 machine around (I do!), you are lucky. If not, then you need to read this article….

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FatFS with Adafruit MicroSD Breakout Board and NXP FRDM-KL25Z

Breakout boards are great: they allow me to explore functions quickly, without to build my custom board: all what I need is some wires and ideally a bread board.

Adadfruit MicroSD Card Breakout Board

Adadfruit MicroSD Card Breakout Board

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Tutorial: Bare-Metal Shell for Kinetis

I have been asked to provide a command line shell example for a bare-metal (no RTOS) application, so here we go!

Having a way to communicate to the firmware on a board is essential for most of my projects: it is simply, incredibly helpful and easy to do (see “A Shell for the Freedom KL25Z Board“). This tutorial shows how to add a simple command line shell to the NXP Freedom board which then can be extended as necessary.

Console Application

Console Application

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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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Zumo Robots at Maker Faire in Rome (16. – 18. Oct. 2015)

I won’t be able to attend the Maker Faire in Rome (16. – 18. Oct. 2015). But five of the Sumo bots students from the previous semesters have built and programmed will be there.

Sumo Robots

Sumo Robots

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