Problem with 'debug' on Arduino2

[ozarchie]

Hi,
I have been porting your library to the STM32 series uP.
After introducing some "#if defined(ARDUINO_ARCH_STM32)" into your examples to address some processor specific issues, I have run into a problem with the Interface,hpp code that I cannot understand.
I am using:
Arduino Version: 2.3.3
Date: 2024-09-25T09:35:36.798Z (1 month ago)
CLI Version: 1.0.4
on a MAC M2.

I can compile and upload (but not work!) successfully without 'debug' turned on.

However, if I set "Optimize" for debug (-Og'), I get the following errors:

Library/Arduino15/packages/STMicroelectronics/tools/xpack-arm-none-eabi-gcc/13.2.1-1.1/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: sketch/TMCTestStepperInterface.ino.cpp.o: in function `TMC51X0::TMC51X0()':
Documents/Arduino/libraries/TMC51X0/src/TMC51X0.hpp:23:(.text._ZN7TMC51X0C2Ev[_ZN7TMC51X0C5Ev]+0x6c):

undefined reference to vtable for tmc51x0::Interface

collect2: error: ld returned 1 exit status

Internet searches suggest I need to change :

virtual void writeRegister(uint8_t register_address, uint32_t data);
virtual uint32_t readRegister(uint8_t register_address)};

to

virtual void writeRegister(uint8_t register_address, uint32_t data){};
virtual uint32_t readRegister(uint8_t register_address){return(0);};

This allows the code to compile and allows the Arduino debug interface to work.

But, if I then set the compile options back to smallest '-Os', compile fails with:

Documents/Arduino/libraries/TMC51X0/src/./TMC51X0/Interface.hpp: In member function 'virtual void tmc51x0::Interface::writeRegister(uint8_t, uint32_t)':
Documents/Arduino/libraries/TMC51X0/src/./TMC51X0/Interface.hpp:25:40: warning: unused parameter 'register_address' [-Wunused-parameter]
   25 |     virtual void writeRegister(uint8_t register_address, uint32_t data) {};
      |                                ~~~~~~~~^~~~~~~~~~~~~~~~
Documents/Arduino/libraries/TMC51X0/src/./TMC51X0/Interface.hpp:25:67: warning: unused parameter 'data' [-Wunused-parameter]
   25 |     virtual void writeRegister(uint8_t register_address, uint32_t data) {};
      |                                                          ~~~~~~~~~^~~~

Any suggestions?

[peterpolidoro]

Hi! This library is still under active development so I may be making significant changes until I have worked out most of the functionality.

The unused parameter warning should disappear if you remove the parameter names. I have implemented these changes in one of the last commits that I pushed up to the repository. Can you please try it again and see if it fixes your issue? Thanks!