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Zephyr project on STM32

   Zephyr Workbench, a VSCode extension to manage Zephyr on STM32.
It enables users to easily create, develop, and debug Zephyr applications.
Main features:
  • Install host dependencies.
  • Import toolchain and SDK.
  • Create, configure, build and manage apps.
  • Debug STM32.
You can directly download it from the VSCode marketplace
For more details, visit the Zephyr Workbench

System Workbench for STM32

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Some undefined references

Posted by electr0dave on 2016-06-16 10:42

Hello.

I’m a new user of System Workbench for STM32.
When I create the configurations with CubeMX and import the project all works fine.
But when I “re-open” the CubeMX and make some changes, the compilation start to give errors.

In this case, the errors are:

Building target: UDP_coupler.elf
Invoking: MCU G++ Linker
arm-none-eabi-g++ -mcpu=cortex-m7 -mthumb -mfloat-abi=softfp -mfpu=fpv5-sp-d16 -Wl,-Map=output.map -Wl,--gc-sections -fno-exceptions -fno-rtti -lm -o “UDP_coupler.elf” @”objects.list”
c:/ac6/systemworkbench/plugins/fr.ac6.mcu.externaltools.arm-none.win32_1.7.0.201602121829/tools/compiler/bin/../lib/gcc/arm-none-eabi/5.2.1/../../../../arm-none-eabi/lib/armv7e-m/softfp/fpv5-sp-d16\libc.a(lib_a-exit.o): In function `exit’:
exit.c:(.text.exit+0x16): undefined reference to `_exit’
c:/ac6/systemworkbench/plugins/fr.ac6.mcu.externaltools.arm-none.win32_1.7.0.201602121829/tools/compiler/bin/../lib/gcc/arm-none-eabi/5.2.1/../../../../arm-none-eabi/lib/armv7e-m/softfp/fpv5-sp-d16\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: *** UDP_coupler.elf Error 1


Can you help me please?


Thanks

Reads: 11783
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Posted by tarek bouchkati on 2016-06-16 11:08 Tunisia

Hello David,

You need either to add syscall.c to your project or add “-specs=nosys.specs” to (Project -> Properties -> C/C++ Build -> Settings -> MCU GCC Linker -> Linker flags)

Regards,
Tarek

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Posted by electr0dave on 2016-06-16 12:53

Have I answered in a wrong location?

Maybe I should write here...

Link



Posted by tarek bouchkati on 2016-06-16 13:28 Tunisia

It seems that your application is not located within FLASH (AXI).
Are intentionally linking into TCM FLASH ??
If not could you attach the linker file (*.ld)

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Posted by tarek bouchkati on 2016-06-16 14:12 Tunisia

yes, your linker is not modified. but the error message indicates that you have data at address 0 & 26964.
This address range is not located within flash which explains the warning “no flash bank found for address 0 / 26946”.
to verify could you please attach the map file (~/Debug/output.map)

maybe you are not pointing to this linker, check (Project > Properties > C/C++ Build > Settings > MCU GCC Linker > General > Linker flags > Linker Script (-T) )

Link
Posted by electr0dave on 2016-06-16 15:21

Thank you for your patience.

In annex I put the *.map file.

;)

Now I’ve changed the linker to “STM32F746ZGTx_FLASH.ld” and works fine!

But I do not understand why this change... why, in a momment works nice, and the next momment all of this goes crazy...

output.rar (55.40 Kb)
Link
Posted by tarek bouchkati on 2016-06-16 15:36 Tunisia

Please find my comments with green

Thank you for your patience.

In annex I put the *.map file.
this map file is obtained after you have fixed the project
;)

Now I’ve changed the linker to “STM32F746ZGTx_FLASH.ld” and works fine!
Glad to hear that

But I do not understand why this change... why, in a momment works nice, and the next momment all of this goes crazy...
You probably have intentionally discarded the linker settings so the arm_none_eabi_ld have used the default setting (flash at address 0)

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Posted by electr0dave on 2016-06-16 16:10

OK.

For now all works fine... thanks to your help.

Thank you for your time.

biggrin

Regards,
David

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