The putchar function transmits the character c using the serial port.

Note

• This routine is implementation-specific and its function may deviate from that described above. Source code is provide in the LIB folder. You may modify the source to customize this function for your particular hardware environment.

The putchar routine returns the character output, c.

_getkey, getchar, ungetchar

#include <stdio.h>

void tst_putchar (void) {
  char i;

  for (i = 0x20; i < 0x7F; i++)
    putchar (i);
}