2021-07-28 03:33 AM
.\crccal.axf: Error: L6218E: Undefined symbol SystemInit (referred from startup_stm32f401xx.o).
2021-07-28 06:33 AM
Ensure SystemInit exists in your project somewhere, is being compiled as a C function, and that the resulting object file (*.o) that contains it is passed to the linker.