topic Re: Which library is required for using KL devices? in Kinetis Design Studio

Which library is required for using KL devices?

mjbcswitzerland — Fri, 02 May 2014 06:08:28 GMT

I notice that K devices build without there being any libraries specified but KL devices doen't - there are missing low-level calls required by the compiler.

When using CW10.5 I found that KL devices needed the library "${MCUToolsBaseDir}/ARM_GCC_Support/ewl/lib/armv6-m"

What is suitable in the KDS environment?

Regards

Mark

Re: Which library is required for using KL devices?

BlackNight — Fri, 02 May 2014 08:57:18 GMT

Hi Marc,

The GNU ARM Embedded toolchain in CodeWarrior is different from the one used in KDS.

The CodeWarrior 'ewl' library is a CodeWarrior (Embedded Warrior Library) specific one. KDS is using open source libraries instead.

Which low level calls are you missing? The GNU toolchain in KDS automatically links with the newlib. You can change this to the newlib-nano with using the -nanolibc linker option.

Regards,

Erich

Re: Which library is required for using KL devices?

mjbcswitzerland — Fri, 02 May 2014 15:01:01 GMT

Erich

When I select Cortex-m0plus (rather than Cortex-m4) the following functions are missing at the moment:

__aeabi_uidiv

__aeabi_idiv
__gnu_thumb1_case_uqi

__gnu_thumb1_case_uhi

I don't yet see where libraries are being linked and also I haven't been able to locate the libary files themselves in the package.

Regards

Mark

Re: Re: Which library is required for using KL devices?

BlackNight — Sat, 03 May 2014 07:45:28 GMT

Mark,

I'm using cortex-m0plus too, and do not see any missing functions:

make all

'Building target: FRDM-KL25Z_bare.elf'

'Invoking: Cross ARM C++ Linker'

arm-none-eabi-g++ -mcpu=cortex-m0plus -mthumb -O0 -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -g3 -T "LinkerFile.ld" -Xlinker --gc-sections -L"C:/tmp/wsp_KDS_v1.0.1/FRDM-KL25Z_bare/Project_Settings/Linker_Files" -Wl,-Map,"FRDM-KL25Z_bare.map" -nanolibc -o "FRDM-KL25Z_bare.elf" ./Sources/cfmconfig.o ./Sources/main.o ./Project_Settings/Startup_Code/Vectors.o ./Project_Settings/Startup_Code/startup.o

'Finished building target: FRDM-KL25Z_bare.elf'

' '

'Invoking: Cross ARM GNU Print Size'

arm-none-eabi-size --format=berkeley "FRDM-KL25Z_bare.elf"

text data bss dec hex filename

1400 32 1136 2568 a08 FRDM-KL25Z_bare.elf

'Finished building: FRDM-KL25Z_bare.siz'

But my program is using __udivsi3 and __divsi3.

So it looks to me that you are linking with libraries which have been built with differernt settings or with a different compiler?

The thing is that KDS is *not* using the launchpad GNU ARM gcc, but a GNU ARM gcc.

It looks like you need a launpad GNU ARM toolchain?

I have my project attached as a reference.

Erich

Re: Re: Which library is required for using KL devices?

mjbcswitzerland — Sat, 03 May 2014 14:35:09 GMT

Erich

Thanks.

I found that I can built for the Cortex M4 without using default libraries (-nostdlib) but I need to enable default libraries for the Cortex M0plus (just use -nostartfiles).

Therefore when I use this setting it then works form both core types and there doesn't look to be any side-effects for the Cortex-4 sinc ethe generated coded is the same.

Regards

Mark