Umfrage Test

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Testumfrage

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Testquote

 

Ein bißchen Code:

 

#if RX_BUFFER_SIZE0<256
unsigned char rx_wr_index0,rx_rd_index0,rx_counter0;
#else
unsigned int rx_wr_index0,rx_rd_index0,rx_counter0;
#endif

// This flag is set on USART0 Receiver buffer overflow
bit rx_buffer_overflow0;

// USART0 Receiver interrupt service routine
interrupt [uSART0_RXC] void usart0_rx_isr(void)
{
char status,data;
status=UCSR0A;
data=UDR0;

if ((status & (FRAMING_ERROR | PARITY_ERROR | DATA_OVERRUN))==0)
  {
  rx_buffer0[rx_wr_index0]=data;
  if (++rx_wr_index0 == RX_BUFFER_SIZE0) rx_wr_index0=0;
  if (++rx_counter0 == RX_BUFFER_SIZE0)
     {
     rx_counter0=0;
     rx_buffer_overflow0=1;
     };
  };
}

 

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