// DMX Empfang interrupt [USART1_RXC] void usart1_rx_isr(void) { // Variablen unsigned char USART_State; unsigned char RX_Byte; // Datenzuweisung RX_Byte = UDR1; USART_State = UCSR1A; // Framing error aka Break erkannt? if (USART_State &(1<