#include "uart.h"

/// // UART-Receiver...
/// ISR(USART_RXC_vect)
/// {
  /// unsigned char buffer;
  /// buffer = UDR;
  /// if(uart_string.size == -1) return;
  /// if(buffer == '\n')
  /// {
    /// uart_string.data[uart_string.size] = '\0';
    /// uart_string.size = -1;
  /// }
  /// else
  /// {
    /// uart_string.data[uart_string.size] = buffer;
    /// if(++uart_string.size > STRING_SIZE)
    /// { uart_string.size = 0; }
  /// }
/// }

void uart_init()
{
  /// uart_string.size = 0;
  /// uart_string.data[0] = '\0';

  // activate UART TX // and RX...
  UCSRB |= (1<<TXEN); // | (1<<RXEN) | (1<<RXCIE);
  // Asynchron 8N1 ...
  UCSRC |= (1<<URSEL) | (1<<UCSZ1) | (1<<UCSZ0);

  UBRRH = UBRRH_VALUE;
  UBRRL = UBRRL_VALUE;
  #if USE_2X
    UCSRA |= (1 << U2X);
  #else
    UCSRA &= ~(1 << U2X);
  #endif
}

void uart_putc(char c)
{
  UDR = c; /* schreibt das Zeichen x auf die Schnittstelle */
  loop_until_bit_is_set(UCSRA, UDRE);
}