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mincrmatt12 avatar mincrmatt12 commented on September 7, 2024

Looks like it's coming from the FreeRTOS sources which say they need hardware FPU support turned on, are you sure it is? The instructions it's complaining about are related to storing FPU context. I'm also moving this to the freertos repo since the lwip code seems fine.

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jcw avatar jcw commented on September 7, 2024

There are different levels of h/w floating point (sing/double precision, maybe that's relevant here.
I'll look into it, thanks for your reply.

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oqueber avatar oqueber commented on September 7, 2024

As seen in https://www.freertos.org/FreeRTOS_Support_Forum_Archive/October_2011/freertos_STM32F4_with_FPU_4761747.html you must add -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=softfp to the buil…

eg: build_flags = -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=softfp

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