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    • sprinf conversion of float is not working for STM32F7

    Posted by tarek bouchkati on 2016-06-20 12:39 Tunisia

    Kevin is right :
    "-u _printf_float" should be after "-specs=nano.specs"

    Notes :
    arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb -mfloat-abi=soft -specs=nosys.specs -specs=nano.specs -Xlinker -u _sprintf_float -Xlinker -u _printf_float -T"../STM32F103CBTx_FLASH.ld" ....

    1. There is no "_sprintf_float"
    2. You do not need Xlinker options
    3. You should have only one -u _printf_float
    4. In (project properties > C/C++ Build > Setings > Tool Settings (TAB) > MCU GCC Linker > Miscellaneous > Linker flags),you should have " -specs=nosys.specs -specs=nano.specs -u _printf_float"
    Reads: 3828
    Posted by sync1 on 2016-06-20 13:22

    Many thanks tarek,

    My problem issue was that was adding the "-u_printf_float" option using the "ADD ICON" which put the required string into the TEXT BOX below ? ..
    This was working ok on previous versions of Sytem32 Workbench ...but ... The Latest version doesn't work like that anymore ... so what I did was to edit/replace the main string at the top ( -specs=nosys.specs -specs=nano.specs ) to what you have shown above .(-specs=nosys.specs -specs=nano.specs -u _printf_float). this worked OK ..
    Thanks again for your help.😀