Can't override a '__weak' function

[diverger]

Hi,

I write my own 'void HAL_SPI_TxRxCpltCallback(SPI_HandleTypeDef *hspi)', intend to override the default weak one. But when debug, my version is never called, it always steps into the 'weak' one. I'm new to CubeIDE, the version is 1.16.0, any suggestions?

Thanks.

[Tesla DeLorean · Accepted solution]

Using .cpp ?

Double check spelling/capitalization

Perhaps use objdump to inspect generated object from your source file.

[diverger]

Hi,

My project is created as C++ project indeed. But my 'strong' version is defined in a ".c" file. Even I convert the project to 'C' project, my strong version won't be called. And I'm sure they have same signatures.

BTW: does CubeIDE support 'objdump'? I'm on Windows system, not Linux.

[Tesla DeLorean]

I'm running GNU/GCC on Windows and have objdump and objcopy, and on Keil I have fromelf

Y:\STM32\GNU>objdump
Usage: objdump <option(s)> <file(s)>
 Display information from object <file(s)>.
 At least one of the following switches must be given:
  -a, --archive-headers    Display archive header information
  -f, --file-headers       Display the contents of the overall file header
  -p, --private-headers    Display object format specific file header contents
  -P, --private=OPT,OPT... Display object format specific contents
  -h, --[section-]headers  Display the contents of the section headers
  -x, --all-headers        Display the contents of all headers
  -d, --disassemble        Display assembler contents of executable sections
  -D, --disassemble-all    Display assembler contents of all sections
  -S, --source             Intermix source code with disassembly
  -s, --full-contents      Display the full contents of all sections requested
  -g, --debugging          Display debug information in object file
  -e, --debugging-tags     Display debug information using ctags style
  -G, --stabs              Display (in raw form) any STABS info in the file
  -W[lLiaprmfFsoRt] or
  --dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,

          =frames-interp,=str,=loc,=Ranges,=pubtypes,
          =gdb_index,=trace_info,=trace_abbrev,=trace_aranges,
          =addr,=cu_index]
                           Display DWARF info in the file
  -t, --syms               Display the contents of the symbol table(s)
  -T, --dynamic-syms       Display the contents of the dynamic symbol table
  -r, --reloc              Display the relocation entries in the file
  -R, --dynamic-reloc      Display the dynamic relocation entries in the file
  @<file>                  Read options from <file>
  -v, --version            Display this program's version number
  -i, --info               List object formats and architectures supported
  -H, --help               Display this information

Y:\STM32\GNU>objdump -v
GNU objdump (GNU Tools for ARM Embedded Processors) 2.24.0.20141128
Copyright 2013 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) any later version.
This program has absolutely no warranty.

View more

Not sure what CubeIDE brings in, but I'm not limited by that

[TDK]

Temporarily rename the weak one to something else, see if it compiles and links. Could be a misspelling in your strong version, or the string version isn't being compiled.