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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 sync1 on 2016-06-19 13:47

Hi Tarek,

I treid adding “-u _printf_float” to enable float printf. as you suggest but after build i get the following errors?


Building target: EM34.elf
Invoking: MCU GCC Linker
arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb -mfloat-abi=soft -specs=nosys.specs -specs=nano.specs -Xlinker -u _printf_float -T”../STM32F103CBTx_FLASH.ld” -Wl,-Map=output.map -Wl,--gc-sections -lm -o “EM34.elf” @”objects.list”
arm-none-eabi-gcc.exe: error: _printf_float: No such file or directory
make: *** EM34.elf Error 1

I am using latest updates for STM32 CubeMX, and STM32 Workbench..... I recall this solution used to work on previuos version but not now?
Any suggestions?

Reads: 3486
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Posted by tang on 2016-06-20 11:13

Hi,

I think you put the “-u _printf_float” on the wrong place, it should be in the linker flags and not the -Xlinker area.

Regards
Kevin.

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Posted by sync1 on 2016-06-20 12:19

Hi Tang,

I am sure I put the options under the Linker Flags, as I said this option was working under previous versions (unsure which version it was) but I recently clicked “update” on both the STM32 CubeMX and the System32 Workbench programs and now for some unlknown reason The Linker throws the following errors:

Building target: EM34.elf
Invoking: MCU GCC Linker
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” -Wl,-Map=output.map -Wl,--gc-sections -lm -o “EM34.elf” @”objects.list”
arm-none-eabi-gcc.exe: error: _sprintf_float: No such file or directory
arm-none-eabi-gcc.exe: error: _printf_float: No such file or directory
make: *** EM34.elf Error 1

(see attached image)

LinkerSettings.png (42.06 Kb)
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