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Rev 21 Rev 73
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#define F_CPU 1000000UL
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#define F_CPU 1000000UL
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#define F_BAUD  31250UL
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#define F_BAUD  31250UL
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#include <inttypes.h>
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#include <inttypes.h>
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#include <string.h>
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#include <string.h>
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#include <avr/io.h>
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#include <avr/io.h>
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#include <util/delay.h>
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#include <util/delay.h>
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#include <stdio.h>
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#include <stdio.h>
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static int uart_putchar(char c, FILE *stream);
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static int uart_putchar(char c, FILE *stream);
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static int uart_getchar(FILE *stream);
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static int uart_getchar(FILE *stream);
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static FILE mystdio = FDEV_SETUP_STREAM(uart_putchar, uart_getchar,
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static FILE mystdio = FDEV_SETUP_STREAM(uart_putchar, uart_getchar,
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                                         _FDEV_SETUP_RW);
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                                         _FDEV_SETUP_RW);
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static int
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static int
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    uart_putchar(char c, FILE *stream)
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    uart_putchar(char c, FILE *stream)
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    {
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    {
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      loop_until_bit_is_set(UCSRA, UDRE);
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      loop_until_bit_is_set(UCSRA, UDRE);
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      UDR = c;
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      UDR = c;
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      return 0;
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      return 0;
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    }
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    }
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static int
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static int
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    uart_getchar(FILE *stream)
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    uart_getchar(FILE *stream)
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    {
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    {
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      loop_until_bit_is_set(UCSRA, RXC);
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      loop_until_bit_is_set(UCSRA, RXC);
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      return UDR;
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      return UDR;
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    }
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    }
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void init(void)
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void init(void)
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{
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{
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  // Setup USART for debug channel
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  // Setup USART for debug channel
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  UCSRB = _BV(RXEN)|_BV(TXEN);
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  UCSRB = _BV(RXEN)|_BV(TXEN);
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  UBRRL = (F_CPU / 16 / F_BAUD) - 1;
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  UBRRL = (F_CPU / 16 / F_BAUD) - 1;
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  stdout = &mystdio;
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  stdout = &mystdio;
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  stdin = &mystdio;
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  stdin = &mystdio;
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}
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}
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int main(void)
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int main(void)
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{
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{
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    init();
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    init();
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    printf("Hello, World!\n");
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    printf("Hello, World!\n");
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    return 0;
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    return 0;
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}
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}
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