Preparing for Austin/TX – with no Rudy’s Sauce

YES! I’m going to attend the Freescale Technology Forum conference (http://www.freescale.com/ftf) in Austin, Texas Jun 22-25 this year. Right on time, as I have run out of Rudy’s BBQ sauce (see “Smoking BBQ Baby Back Ribs – Swiss Style“): I will need to travel light so I have enough space and weight room for bringing back BBQ sauce :-). But ‘no sauce’ does not mean ‘no BBQ‘!!!!

Smoking BBQ

Smoking BBQ

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Code Coverage with gcov, launchpad tools and Eclipse Kinetis Design Studio V3.0.0

What makes Eclipse great: using open source tools there are a lot of tools and techniques available which usually are only provided for desktop development.

A while back I described how to do code coverage with Eclipse Kepler and the GNU ARM Embedded (launchpad) tools (see “Code Coverage for Embedded Target with Eclipse, gcc and gcov“). With Kinetis Design Studio out, time to do the same with that Eclipse distribution, especially as Freescale is now using the stock GNU ARM Embedded tools too.

Coverage with multiple Files

Coverage with multiple Files

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Problem: undefined reference to ‘__end__’ if using Semihosting

In case you are running into the following GNU linker error about a missing __end__:

'Building target: MyProject.elf'
'Invoking: Cross ARM C++ Linker'
...
toolchain/bin/../lib/gcc/arm-none-eabi/4.8.4/../../../../arm-none-eabi/lib/armv6-m/rdimon-crt0.o: In function `_start':
(.text+0xdc): undefined reference to `__end__'
collect2.exe: error: ld returned 1 exit status
make: *** [MyProject.elf] Error 1
Failed link because missing __end__

Failed link because missing __end__

The GNU linker complains that rdimon-crt0.o needs the symbol __end__.  This symbol marks the end of the user data/RAM section, and is needed by the rdimon library specs which is used with semihosting.

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Merging NXP LPCXpresso IDE with Freescale Kinetis Design Studio, Processor Expert and Kinetis SDK

So NXP announced here a $40 Billion Merger with Freescale. Frequent readers of my blog will know that I’m using in my own and university projects many Freescale devices with Eclipse based tools (Eclipse Kepler/Luna, Emprog ThunderBench, Atollic TrueSTUDIO, Freescale CodeWarrior and of Freescale Kinetis Design Studio) in combination with Processor Expert. In a few projects I have used NXP devices with the CodeRed Eclipse base tools too. So I was curious how that merger of the two silicon companies could look like, if you merge the Freescale and NXP Eclipse based tools, and mix it with Processor Expert and the Freescale Kinetis SDK? The result looks like this:

LPCXpresso v7.7.2 with Processor Expert and Kinetis SDK

LPCXpresso v7.7.2 with Processor Expert and Kinetis SDK

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Semihosting for Kinetis Design Studio V3.0.0 and GNU ARM Embedded (launchpad)

Freescale has released the v3.0.0 version of the Kinetis Design Studio: this one comes with a great positive change: instead of a custom toolchain, it is coming with the standard GNU ARM Embedded (launchpad) toolchain from ARM. Beside of better code density and less RAM needed, there is one change which affects semihosting. Previously, semihosting was enabled by default in the V2.0.0 libraries. Now semihosting needs to be turned on. This post is how to do this.

Semihosting Console with Output in Eclipse

Semihosting Console with Output in Eclipse

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Solving “The connected emulator does not support serial wire output (SWO)” for Segger J-Link

SWO (Serial Wire Output) is a cool feature defined by ARM as part of the CoreSight debug block. However, not every debug connection supports SWO, as it requries extra pins routed from the microcontroller to the debug JTAG/SWD header.

If I’m using the Segger J-Link, and if my hardware does not support SWO, I will get a dialog telling me “The connected emulator does not support serial wire output (SWO).”

The connected emulator does not support serial wire output (SWO)

The connected emulator does not support serial wire output (SWO)

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GDB Client and Server: Unlocking GDB

In case you face problems with launching GDB: Then I have a quick solution (well: workaround): kill the GDB server and or client process. The problem can show up in many way, but in general gdb is stuck or does not respond:

GDB stuck?

GDB stuck?

But it could be an error message like this too:

Error in services launch sequence
Starting J-Link GDB Server timed out.

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