Category Archives: CPU’s

Attaching to a Running Target with Segger J-Link, GDB and Eclipse

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This happens several times for me: I have a board running for a while (even for days), and then it crashes or is stuck somewhere. Yes, I usually use a watchdog do recover from that situation. But it would be good to know and debug the problem. With CodeWarrior I had the functionality in the debugger to ‘attach’ or ‘connect’ to a running (stuck/crashed) board. However, with Eclipse/Kinetis Design Studio/GDB this is a different debugger, and not possible. At connection time with the debugger the target does a reset, so I don’t know any more where the application crashed. But now I have a solution, at least with the Segger GDB :-).

Debug Hard Fault Attached Target

Debug Hard Fault Attached Target

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Using Kinetis Design Studio with IAR Embedded Workbench IDE

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For everyone who wants to combine the power of Eclipse and Processor Expert with the IAR Embedded Workbench IDE, here is how to get them working side by side:KDS with IAR Continue reading →

Updated Percepio Tracealyzer and Trace Library to Version V2.7.0

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Percepio has recently released the v2.7 version of Tracealyzer. This is a major upgrade from the v2.6 version which I have used so far: time to upgrade my Trace component for FreeRTOS to the latest and greatest v2.7!

FreeRTOS Plus Trace View

FreeRTOS+Trace View (V2.7)

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Snow Plowing (Darth Vader) Sumo Bot

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Finally, winter with lots of snow arrived in Switzerland. Getting up at 5am this morning to free up my front yard from the 25 cm snow which came down overnight, so I can drive my wife to work. She does not like driving in snow conditions, but it is fun for me :-). But lots of snow, I thought I could use a little helper bot:

Snow Plowing Sumo Bot

Snow Plowing Sumo Bot

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USB with the Freescale FRDM-K22F Board

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The FRDM-K22F is one of the latest members of the Freedom board families: 512 KByte Flash, 128 KB RAM and the usual Freedom board components on it. Unfortunately, Freescale decided not to populate the micro-SD card connector on the board, so from this perspective the FRDM-K64F is more value for the money. But the board has USB, so this makes it still interesting. And this is what this post is about: Adding USB to the FRDM-K22F board in a few minutes…

Freescale FRDM-K22F Board

Freescale FRDM-K22F Board

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Sumo with GoPro, and other Sumo Videos

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Here are the videos and results of the Mini-Sumo competition held on 19-Dec-2014 in Horw, Switzerland:

  • Winner full-autonomous tournament: “The:Flash”
  • Winner semi-autonomous tournament: “Banana-Rob”

See “Infotronic WS2014 Sumo Robots are Ready!” for all the robot portraits.

Watching a Sumo Battle

Watching a Sumo Battle

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Tutorial: IoT Datalogger with ESP8266 WiFi Module and FRDM-KL25Z

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In my earlier post “Tutorial: Web Server with the ESP8266 WiFi Module” I  used the ESP8266 WiFi module to run a local web server. This is a cool way to control devices inside my network. But to use that web page from the internet, I would need to open up my router which I don’t want to do for obvious reasons. Why not going the other way: host the web page in the internet, and have my board communicating with that internet page? This is exactly what this hype around IoT (Internet of Things) is all about :-).

ThingSpeak Channel for ESP8266

ThingSpeak Channel for ESP8266

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Tutorial: Web Server with the ESP8266 WiFi Module

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It has been a while since my first post about the ESP8266 (see “Cheap and Simple WiFi with ESP8266 for the FRDM Board“). The ESP8266 is a new inexpensive ($4.50) WiFi module which makes it easy to connect to the network or internet. Finally this week-end I have found the time to write up a tutorial:
how to implement a WiFi web server for the ESP8266 WiFi module and the Freescale FRDM-KL25Z board:

WSP8266 Web Server

WSP8266 Web Server

FRDM-KL25Z with ESP8266 WiFi Module

FRDM-KL25Z with ESP8266 WiFi Module

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