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    • CubeMX F4 projec with freertos will not build cos of asm instruction

    Posted by SyUm75 on 2015-04-20 15:37

    Hi ST world,

    I have the current issue when compiling freertos port.c file given in STM32F4 cube which seems the same than the previous one:

    Compiler command:
    arm-none-eabi-gcc -mcpu=cortex-m4 -mthumb -mfloat-abi=soft .... Lot of includes .... "../src/Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F/port.c"

    Output:
    Error: selected processor does not support Thumb mode `vstmdbeq r0!,{s16-s31}'
    Error: instruction not allowed in IT block — `stmdb r0!,{r4-r11,r14}'


    I tried to remove -mthumb from the compiling command for this file only but I couldn't find the way to do this in eclipse framework.

    Any ideas ?
    Thanks,
    Sylvain

    Reads: 4852
    Posted by www.freertos.org on 2015-04-21 09:09

    This build error is caused by an incorrect fpu specification in the build options, not by the -mthumb option (you must use -mthumb as the Cortex-M only supports THUMB 2 instructions).

    Regards,
    Richard (http://www.freertos.org)