#define SS_PIN ONBOARD_SD_CS_PIN

1 
           ^~~~~~

*** [.pio\build\BIGTREE_SKR_PRO\src\src\HAL\STM32\HAL.cpp.o] Error 1
*** [.pio\build\BIGTREE_SKR_PRO\src\src\HAL\STM32\Servo.cpp.o] Error 1
*** [.pio\build\BIGTREE_SKR_PRO\src\src\HAL\STM32\HAL_SPI.cpp.o] Error 1
*** [.pio\build\BIGTREE_SKR_PRO\src\src\HAL\STM32\Sd2Card_sdio_stm32duino.cpp.o] Error 1

2

There is not enough information to help you in any way here.

  • what exact project are you compiling with what platformio.ini?
  • what changes have you done to the source code?
  • what’s the full error?
    …