Loading...
 

SW4STM32 and SW4Linux fully supports the STM32MP1 asymmetric multicore Cortex/A7+M4 MPUs

   With System Workbench for Linux, Embedded Linux on the STM32MP1 family of MPUs from ST was never as simple to build and maintain, even for newcomers in the Linux world. And, if you install System Workbench for Linux in System Workbench for STM32 you can seamlessly develop and debug asymmetric applications running partly on Linux, partly on the Cortex-M4.
You can get more information from the ac6-tools website and download (registration required) various documents highlighting:

System Workbench for STM32


snprintf() Outputs Empty String

The code:

char *pstrResp;
pstrResp = pvPortMalloc( 23 );
snprintf( pstrResp, 23, "%8.6g", .0123 );

Produces an empty string in pstrResp. In it there is only the NULL terminator in the first character position. I expected .0123 to be converted to characters and placed in pstrRes. What is wrong here?

The pstrResp points to a RAM location so it is known that pvPortMalloc() succeded.
If I include a string using %s specifier the string does show up in pstrResp.

Processor is STM32F373VCT
This is an STM32CubeMX generated project with the FREERTOS option enabled.
The compiler is GNU.

Tunisia

check if you are using nanolib (-specs=nano.specs in Project properties > C/C++ Build > Settings > Tool Settings (TAB) > MCU GCC Linker > Miscellaneous > Linker flags)
If it is the case, you need to enable float printf :
-specs=nano.specs -u _printf_float

Regards,
Tarek