printf() am ATmega16 benutzen

    #include <stdio.h>

    static int uart_putchar(char c, FILE *stream);

    static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL,

                                             _FDEV_SETUP_WRITE);

    static int

    uart_putchar(char c, FILE *stream)

    {

      if (c == '\n')

        uart_putchar('\r', stream);

      loop_until_bit_is_set(UCSRA, UDRE);

      UDR = c;

      return 0;

    }

    int

    main(void)

    {

      init_uart();

      stdout = &mystdout;

      printf("Hello, world!\n");

      return 0;

    }