Category Archives: Debugging

CMSIS-DAP with IAR and the KL25Z Freedom Board

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Beside of USBDM, there is another Open Source implementation of a debug interface for the Freedom Board OpenSDA: CMSIS-DAP.

CMSIS-DAP stands for ‘Cortex Microcontroller Software Interface Standard – Debug Access Port’) has been published by ARM Inc. With this, there is an open source alternative to proprietary implementation (e.g. P&E OpenSDA or Segger OpenSDA).
Beside of the ARM MDK IDE, CMSIS-DAP is supported by Coocox and IAR. And IAR is what I’m using in this post.

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Freedom Board with Segger OpenSDA Debug Firmware

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Looks like there is some movement on the ‘OpenSDA Front’: After CodeRed has released their RedProbe OpenSDA firmware, now Segger has released an OpenSDA firmware.

With this, I get a low-cost debugging solution similar to the well-known J-Link run control devices. The OpenSDA Segger Firmware is something like a J-Link-lite.

FRDM-KL25Z with Segger OpenSDA Debug Firmware

FRDM-KL25Z with Segger OpenSDA Debug Firmware

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USBDM 4.10.5 supports now MCU10.4

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Wow, that was fast! The SourceForge USBDM project has added support for MCU10.4 (see as well this post) in release 4.10.5 available here, announced in the Freescale Forum.

USBDM 4.10.5 Installer

USBDM 4.10.5 Installer

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Adding USBDM to CodeWarrior for MCU10.4

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If you are following my recent posts, then you know I started using USBDM on OpenSDA as an alternative run control solution. Now with the advent of MCU10.4, the question is: how to use USBDM with it, because the USBDM installer obviously only knows the version up to MCU10.3?

USBDM 4.10.4a Installer

USBDM 4.10.4a Installer

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Review of CodeWarrior for MCU10.4

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Freescale has released this week an updated version of CodeWarrior: version 10.4. I’m usually not switching a tools version in the middle of a university semester. Unless I see a real benefit, and the risk is low. Well, I have used it now for a few days, and I have decided to move my projects from 10.3 to 10.4. Why? Read on…

CW for MCU10.4

CW for MCU10.4

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Debugging FRDM-KL05Z with USBDM

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I mentioned in “Debug External Processors with USBDM and Freedom Board” post that I had a problem to debug the FRDM-KL05Z with USBDM. Well, after a long night with some sleep, with more thinking and searching, finally I have it resolved: I can debug my FRDM-KL05Z with USBDM 🙂

FRDM-KL05Z Debugging with USBDM

FRDM-KL05Z Debugging with USBDM

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Debug External Processors with USBDM and Freedom Board

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Teaching at a university means to work in a very special environment. What students love is ‘Open Source’: because it allows them to ‘see’ things and learn from the technology. The other thing is: students have a low budgets, so they appreciate if they can use inexpensive or low-cost hardware and software. The FRDM-KL25Z Freedom board for sure meets that low price, and no extra programming device needed.

Now they are building their own boards, and they wish to program and debug it. They can borrow the Segger J-Links and P&E Multilinks we have available at the university. But why not use the Freedom board as ‘hobby’ debug and programming solution? As explored in “Using the Freedom Board as SWD Programmer“, they can use the default factory installed OpenSDA to program another microcontroller of same type. But not to debug it.

While writing the “Using the Freedom Board as SWD Programmer” article, I was looking into USBDM. USBDM has added in January 2013 support for OpenSDA. But at that time, it was somehow not working for me, and I had not enough time to find out what the problem was. Time to get that fixed. Good news: With help and tips from the USBDM community, I have it finally working 🙂

USBDM Debugging another FRDM-KL25Z

USBDM Debugging another FRDM-KL25Z

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Using the Freedom Board as SWD Programmer

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I love the Freescale Freedom boards because they are low-cost, and I do not need a special debug device, as they have the on-board OpenSDA. It is using a small Kinetis-K20 which acts as JTAG SWD debugging probe. Why not using the Freedom board to program another board?

FRDM-KL25Z board programs another board

FRDM-KL25Z board programs another board

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A new Freedom Board: FRDM-K20D50M with ARM Cortex M4

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Freescale/Farnell/Element14 announced last week a new Freedom Board: the FRDM-K20D50M :-). As you can expect, I was not able to resist, and ordered one from my local Farnell store right away. So I did my first steps with it on this sunny and wonderful weekend (yes! we skipped Spring Time and entered Summer Time right away!).

I do not need to compare the board with the previous Freedom boards, as I have found an article here. I a nutshell: I get pretty much the same as with the FRDM-KL25Z, but instead of an ARM Cortex-M0+, it has an ARM Cortex-M4!

The new FRDM-K20D50M Board

The new FRDM-K20D50M Board

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Show it again! (How to re-enable hidden Dialogs in Eclipse)

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Eclipse has a nice feature to ‘shut up’ dialogs: In many dialogs I can select an option so that dialog does not show up again:

'Dont' show Again' in Dialog

‘Dont’ show Again’ in Dialog

But what if I change my mind later on and what to have this dialog to show up again?

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