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Getting started with a Kinetics K64 C++ project

Question asked by Julian Heni on Aug 15, 2019
Latest reply on Aug 23, 2019 by Julian Heni

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Hey guys,

I started to work with an existing K64 project.

However i could not get c++ to run (Constructors and destructors are not getting called).

Therefore i decided to

1) take a clean K64 project,

2)try to get this to run on my target

3)and hence convert it to c++.

(first question: is there already an example c++ project out there?)

However this is easier said than done.

Unlike ST NXP does not seam to offer anything like CubeMX (or i haven't found it).

I did come across the MCUXpresso SDK Builder. I did select my MCU "MK64FN1M0VDC12" and selected "build"

However the "GCC Arm Embedded toolchain" fails to compile when i run the provided shell scripts (several CMAKE errors).

After failing the GCC Arm embedded toolchain i tried the MCUexpresso IDE version. What version do i have to select from this dialog?

The SDK Archive or the Config Tools Data?

Could you help me figure out how to get this program to run

No one else has this question

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Omar Anguiano Aug 15, 2019 3:20 PM
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Hello Julian Heni

Unfortunately we don’t have any c++ example. I suggest you to take a look at this link https://isocpp.org/wiki/faq/mixing-c-and-cpp for mixing C and C++.

On the other hand, the file you have to download is the SDK archive, please refer to this video to import an example https://www.nxp.com/video/mcuxpresso-ide-importing-sdk-example-project:MCUXPRESSO-IDE-IMPORTING-SDK-EX

The config tool is an integrated suite of configurations tools that helps users with the development on arm processors.
Let me know if it helps.

Best Regards,
Omar
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Julian Heni Aug 16, 2019 4:57 AM
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Hey thx for your answer. This was indeed helpful .

I did setup an USB sample project.

I event did manage to convert this project to c++ using this instruction

Convert project to C++

However Linking fails with various undefined references

c:/nxp/mcuxpressoide_11.0.0_2516/ide/plugins/com.nxp.mcuxpresso.tools.win32_11.0.0.201905131304/tools/bin/../lib/gcc/arm-none-eabi/8.2.1/../../../../arm-none-eabi/bin/ld.exe: warning: cannot find entry symbol _start; defaulting to 00008000

undefined reference to `memset'
undefined reference to `__data_section_table'
and so on

If i remove the -nostandardlib flag from the linker options the error messages go down to a few

make -r -j8 all
Building target: frdmk64f_host_hid_mouse_keyboard_freertos.axf
Invoking: MCU C++ Linker
arm-none-eabi-g++ -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard -mthumb -o
c:/nxp/mcuxpressoide_11.0.0_2516/ide/plugins/com.nxp.mcuxpresso.tools.win32_11.0.0.201905131304/tools/bin/../lib/gcc/arm-none-eabi/8.2.1/../../../../arm-none-eabi/bin/ld.exe: c:/nxp/mcuxpressoide_11.0.0_2516/ide/plugins/com.nxp.mcuxpresso.tools.win32_11.0.0.201905131304/tools/bin/../lib/gcc/arm-none-eabi/8.2.1/../../../../arm-none-eabi/lib/thumb/v7e-m+fp/hard\libc.a(lib_a-exit.o): in function `exit':
exit.c:(.text.exit+0x16): undefined reference to `_exit'

c:/nxp/mcuxpressoide_11.0.0_2516/ide/plugins/com.nxp.mcuxpresso.tools.win32_11.0.0.201905131304/tools/bin/../lib/gcc/arm-none-eabi/8.2.1/../../../../arm-none-eabi/bin/ld.exe: ./startup/startup_mk64f12.o: in function `ResetISR':
C:\Users\heju\mcuxpresso\workspace\frdmk64f_host_hid_mouse_keyboard_freertos\Debug/../startup/startup_mk64f12.c:537: undefined reference to `__data_section_table'

c:/nxp/mcuxpressoide_11.0.0_2516/ide/plugins/com.nxp.mcuxpresso.tools.win32_11.0.0.201905131304/tools/bin/../lib/gcc/arm-none-eabi/8.2.1/../../../../arm-none-eabi/bin/ld.exe: C:\Users\heju\mcuxpresso\workspace\frdmk64f_host_hid_mouse_keyboard_freertos\Debug/../startup/startup_mk64f12.c:537: undefined reference to `__data_section_table_end'

c:/nxp/mcuxpressoide_11.0.0_2516/ide/plugins/com.nxp.mcuxpresso.tools.win32_11.0.0.201905131304/tools/bin/../lib/gcc/arm-none-eabi/8.2.1/../../../../arm-none-eabi/bin/ld.exe: C:\Users\heju\mcuxpresso\workspace\frdmk64f_host_hid_mouse_keyboard_freertos\Debug/../startup/startup_mk64f12.c:537: undefined reference to `__bss_section_table_end'

c:/nxp/mcuxpressoide_11.0.0_2516/ide/plugins/com.nxp.mcuxpresso.tools.win32_11.0.0.201905131304/tools/bin/../lib/gcc/arm-none-eabi/8.2.1/../../../../arm-none-eabi/bin/ld.exe: ./startup/startup_mk64f12.o:(.isr_vector+0x0): undefined reference to `_vStackTop'

c:/nxp/mcuxpressoide_11.0.0_2516/ide/plugins/com.nxp.mcuxpresso.tools.win32_11.0.0.201905131304/tools/bin/../lib/gcc/arm-none-eabi/8.2.1/../../../../arm-none-eabi/bin/ld.exe: c:/nxp/mcuxpressoide_11.0.0_2516/ide/plugins/com.nxp.mcuxpresso.tools.win32_11.0.0.201905131304/tools/bin/../lib/gcc/arm-none-eabi/8.2.1/../../../../arm-none-eabi/lib/thumb/v7e-m+fp/hard\libc.a(lib_a-sbrkr.o): in function `_sbrk_r':
sbrkr.c:(.text._sbrk_r+0xc): undefined reference to `_sbrk'
collect2.exe: error: ld returned 1 exit status
make: *** [makefile:60: frdmk64f_host_hid_mouse_keyboard_freertos.axf] Error 1
"make -r -j8 all" terminated with exit code 2. Build might be incomplete.

Is there any reason why nostlibs flag is used?
the data_section objects are declared extern in the startup script. But i couldn't find an actual definition of these objects? Where are they coming from?
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- Omar Anguiano @ Julian Heni on Aug 19, 2019 1:36 PM
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  Hello Julian Heni
  
  If you are using the wrong library variant you will see the error "undefined reference to".
  I suggest you to read the chapter 17. C/C++ Library Support https://www.nxp.com/docs/en/user-guide/MCUXpresso_IDE_User_Guide.pdf
  There you can find information about which library variant choose.
  
  Also this post may be useful: https://community.nxp.com/thread/389070
  
  Let me know if this is helpful.
  Best Regards,
  Omar
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  - Julian Heni @ Omar Anguiano on Aug 23, 2019 3:53 AM
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    Hey Omar,
    thx for your answer. I'll have a look and try to figure out the problem
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Getting started with a Kinetics K64 C++ project

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