+ ldi uart_rxtx,(1<<RXEN)|(1<<TXEN)
+ out UCSR0B,uart_rxtx
+
+ ; frame format -> 8n1
+ ldi uart_rxtx,(1<<UCSZ00)|(1<<UCSZ01)
+ sts UCSR0C,uart_rxtx
+
+ ret
+
+UART_INT_RX_INIT:
+
+ in uart_rxtx,UCSR0B
+ sbr uart_rxtx,(1<<RXCIE0)
+ out UCSR0B,uart_rxtx
+
+ ret
+
+UART_INT_TX_INIT: