Tag Archives: Assembly

A Processor Expert Component to Help with Hard Faults

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Ahrg! Again my ARM application crashed somewhere and I ended up in a HardFault exception :-( . In my earlier post I used a handler to get information from the processor what happened. But it is painful to add this handler again and again. So I decided to make things easier for me: with a special HardFault Processor Expert component :-) .

After adding this HardFault component to my project, it automatically adds an entry to the vector table. So no manual steps are needed: having the component in the project and enabled will do the needed steps.

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Debugging Hard Faults on ARM Cortex-M

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It is as bad as this: my application stopped in an unhandled interrupt service routine:

Cpu_Interrupt

Cpu_Interrupt

That does not tell much. I’m using Processor Expert generated code, and with this all my ‘unhandled’ vectors are pointing the same handler:

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MCU10.2 Update 1.0.0 released

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The update 1.0.0 for the MCU10.2 release has been published on the Freescale CW MCU V10.2 Updates & Patches web site. Downloading the 500 MByte zip file and installing the update will take a while. After downloading I select Help > Install New Software … and specify the archive file.

Note: In general uninstalling an eclipse update is not possible. If you want to keep our original MCU10.2 on the side, then follow this trick: Copy your existing MCU10.2 installation folder and rename it (say to ‘MCU10.2_without_update’). Then apply the update to the normal MCU10.2. If you want to revert to the version without the update, simple delete the updated installation and rename the one without the update again. No need to reinstall things again. And you can use both the updated version and the normal version in parallel too: simply launch the eclipse\cwide you want :-)

Time to read the release notes and dig into what has been changed and improved.

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Go, assembly, go!

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As mentioned in my post about the memory view:  I want to go down to the bits and bytes. Same applies to programming: I want to get down to the assembly instruction level, the heavy metal world :-) .

Although it sounds a little bit weird in the age of object-oriented programming and C++, but sometimes I need to do ‘assembly level only’ programming on a 32bit controller too. CodeWarrior for MCU offers assembly only project creation for all the 8bit microprocessors, but for the 32bit including the ColdFire it assumes that the usual way is to use C and C++? Yes, it offers C and C++ and you can add assembly files. But how to do assembly only?
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