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Zephyr project on STM32

   Zephyr Workbench, a VSCode extension to manage Zephyr on STM32.
It enables users to easily create, develop, and debug Zephyr applications.
Main features:
  • Install host dependencies.
  • Import toolchain and SDK.
  • Create, configure, build and manage apps.
  • Debug STM32.
You can directly download it from the VSCode marketplace
For more details, visit the Zephyr Workbench

System Workbench for STM32

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You are viewing a reply to sprinf conversion of float is not working for STM32F7  

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”
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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.biggrin

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