AVR32 stdout umleiten

//--- setup UART0 one for stdio (e.g. printf....)

  set_usart_base((void*)AVR32_USART0_ADDRESS);  // init UART driver (set UART0 adress)

  usart_init(115200);                            // init UART0 with 115200 baud

//--- We are finish to send the world a message

  printf("\r\nHello World\r\n");

#if BOARD == EVK1100

#  define _USART_              (&AVR32_USART1)

#  define _USART_RX_PIN        AVR32_USART1_RXD_0_PIN

#  define _USART_RX_FUNCTION   AVR32_USART1_RXD_0_FUNCTION

#  define _USART_TX_PIN        AVR32_USART1_TXD_0_PIN

#  define _USART_TX_FUNCTION   AVR32_USART1_TXD_0_FUNCTION

#endif

// 

...

//

  static const gpio_map_t USART_GPIO_MAP = { 

      { _USART_RX_PIN, _USART_RX_FUNCTION }, 

      { _USART_TX_PIN, _USART_TX_FUNCTION } 

    };

  // USART options.

  static const usart_options_t USART_OPTIONS = { 

      .baudrate = 57600,

      .charlength = 8, 

      .paritytype = USART_NO_PARITY,

      .stopbits = USART_1_STOPBIT, 

      .channelmode = USART_NORMAL_CHMODE 

    };

  // Switch main clock to external oscillator 0 (crystal).

  pm_switch_to_osc0(&AVR32_PM, FOSC0, OSC0_STARTUP);

  // Initialize the USART

  set_usart_base( ( void * ) _USART_ );

  // Initialize USART in RS232 mode.

  usart_init_rs232(_USART_, &USART_OPTIONS, FOSC0);

  gpio_enable_module(USART_GPIO_MAP, sizeof(USART_GPIO_MAP )

      / sizeof(USART_GPIO_MAP[0] ));

// 

...

//

  printf("write something\n\r");