Kinetis Design Studio - enabling C++ in KSDK projects

[bluetiger9]

I would like to use C++ in a project generated with KSDK Project Generator 2.1 (board FRDM-K82F). I imported the project into Kinetis Design Studio. It was all ok until that point.

I added a simple C++ class in a .hpp files and included that into the main.c. I got some compile errors. This was somewhat expected, as I tried to use C++ in a C file. So, I renamed the main.c to main.cpp, but I'm getting the following error: "(.text+0x4a): undefined reference to `main'". As I saw the main.cpp is not even compiled.

Any idea what is the problem?

[MarekTrmac]

Hi Attila,

there is problem in the manifest - wrong linker specification. Please download the latest package from the KEX server.

Regards

Marek

[bluetiger9]

Hi Marek,

Here is the _manifest.xml:

[XML] FRDM-K82F_manifest.xml - Pastebin.com

Thanks,

Attila

[MarekTrmac]

Hi Attila,

could you please post as attachment "*_manifest.xml" file from the root folder of your KSDK package? I still cannot reproduce the issue, and I susupect the problem is in the manifest file.

Thanks

Marek

[MarekTrmac]

Hi Atilla,

can you describe how to reproduce your problem with two linker scripts in one project?

If I create project for the board (all drivers, no RTOS), there is just one linker, see attached picture:

Regards

Marek

[bluetiger9]

Hi Marek,

I just created a project with the File - New - C++ Project - Executable - Kinetis Project for SDK 2.x wizard. I'm using KDS on Ubuntu. Maybe it's related to this.

Thanks,

Attila

[MarekTrmac]

Hi Attilla,

we cannot reproduce your problem on UBuntu 16.04 (also not on Windows 7). Can you specify what parameters have you selected during project creation (what driver and what RTOS - if any)? Can you find what version of NewProjectWizard do you have - using Help - About - Installation Details - item "New Kinetis SDK 2.x Project Wizard" (version is displayed in the second column).

Thanks

Marek

[bluetiger9]

Hi Marek,

I am using the default setting: all drivers, no RTOS.

Here is a quick video of how I create the project:

KDS 3 - Two linkers scripts - vidme

Eclipse component versions:

Thanks,

Attila

[bluetiger9]

Ok, I found the problem.

There were two conflicting linker scripts used with the linker:

MK82FN256xxx15_flash.ld

MK82FN256xxx15_ram.ld

so the second fucked up the memory regions defined by the first.

The solution was to remove the MK82FN256xxx15_ram.ld from script files from the Cross ARM C++ Linker settings.

Thanks!

[MarekTrmac · Accepted solution]

Hi Atilla,

in KDS 3.2, there is also New Project Wizard for KSDK2.0 available. This allows to create CPP projects too.

Use "File - New - C++ Project - Executable - Kinetis Project for SDK 2.x"

Regards,

Marek Trmac

[bluetiger9]

Hi Marek,

Thanks for your suggestion. I tried it and the following happens:

• the project is successfully created along with a main.cpp
• the build is successful, with some warnings:
  
  

  Description	Resource	Path	Location	Type
  redeclaration of memory region `m_text'	CppTest222		line 61, external location: /opt/Freescale/KDS_v3/toolchain/arm-none-eabi/bin/ld:../MK82FN256xxx15_ram.ld	C/C++ Problem
  redeclaration of memory region `m_interrupts'	CppTest222		line 59, external location: /opt/Freescale/KDS_v3/toolchain/arm-none-eabi/bin/ld:../MK82FN256xxx15_ram.ld	C/C++ Problem
  redeclaration of memory region `m_data'	CppTest222		line 60, external location: /opt/Freescale/KDS_v3/toolchain/arm-none-eabi/bin/ld:../MK82FN256xxx15_ram.ld	C/C++ Problem

• but when I try to upload & debug the project, I get this:

     and the board is still executing the old program.

I looked into the logs, but I can't figure out what could be wrong.

Here are the consoles from KDS:

CDT-Global-Build-Console - Pastebin.com

gdb-traces - Pastebin.com

JLinkGDBServerCL - Pastebin.com

arm-none-eabi-gdb - Pastebin.com

Can you please take a look?

Thanks,

Attila

[TICS_Fiona]

Hello Attila

You may refer to these blogs to use GCC tool chain with C++:

http://mcuoneclipse.com/2012/10/04/processor-expert-gcc-c-and-kinetis-l-and-mqxlite/

http://mcuoneclipse.com/2014/10/25/c-with-kinetis-design-studio/

Hope this helps!

Best Regards

Fiona Kuang

TIC - Technical Information Center

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