migrate kds2 to kds3 got compiler error

[danielzhang_11]

I have a project build on cortex-m0plus, currently using kds2.0

after i had opened it in kds3.0, I change the link flag from -nanolibc to -specs=nano.specs -specs=nosys.specs

there is a compiler error saying :

selected processor does not support Thumb mode 'mrs R0, MSP'

I checked the build settings:

I found that the compiler option is missing -mcpu= cortex-m0plus,

if I add -mcpu= cortex-m0plus in the Other target flags, then it builds without the error, So why this option is not included in the compiler option list automatically? because I already select the ARM family to cortex-m0plus like in the above image.

I checked this project in KDS2.0, that also does not include this option, but in kds2.0, it is default to build for cortex-m0plus, so there is no compiler error.

[BlackNight]

Hi Daniel,

It looks like some projects somehow have a problem (still puzzled about that). And yes, I confirm that in these cases you have to add that to the compiler settings. The root cause seems to me that the launchpad tools are using ARM (not thumb) by default, and despite you have selected Cortex-M0+ in the settings, that option somehow is not passed.

I have added a section

Wrong or missing Thumb mode

to Kinetis Design Studio: Migrating KDS V2.0.0 Projects to GNU Tools for ARM Embedded (Launchpad, KDS V... to have this documented, so thanks for reporting this.

Erich

[ZhangJennie]

hi,

can you please upload your KDS2.0 project here? I will test it on my side.

thanks!

Have a great day,
Zhang Jun

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[danielzhang_11]

can you give me your email address?

[ZhangJennie · Accepted solution]

I just saw Erich posted a very useful document:

Kinetis Design Studio: Migrating KDS V2.0.0 Projects to GNU Tools for ARM Embedded (Launchpad, KDS V...

this may help you.

Have a great day,
Zhang Jun

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[danielzhang_11]

I did follow the steps in the link

the compiler error can be eliminated by adding the -mcpu flag

but the issue that the KDS upgrade assistant can't detect my project is still not fixed.

Have you tried the project i sent to you?

[ZhangJennie]

I just sent you email. you can send me email.