STM32F107VC/Implementing Standard low-level C-functions

To use standard C-functions as printf(), fprintf(), scanf() and fscanf() in or the std::out object in Target dependent Low-Level functins must be implemented.

• __FILE, the file structure.
• __stdin, the standard input object of type __FILE.
• __stdout, the standard output object of type __FILE.
• fputc(), outputs a character to a file.
• ferror(), returns the error status accumulated during file I/O.
• fgetc(), gets a character from a file.
• fgetwc()
• fputwc()
• __backspace(), moves the file pointer to the previous character.
• __backspacewc().

Links

• Keil Target dependent low-level functions
• Keil Redefining library functions