Posted by spflanze on 2016-04-11 05:42

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.