.equ BAUDRATE_LOW = UBRRL+$20 .equ BAUDRATE_HIGH = UBRRH+$20 .equ USART_C = UCSRC+$20 .equ USART_B = UCSRB+$20 .equ USART_A = UCSRA+$20 .equ USART_DATA = UDR+$20 .equ bm_USARTC_en = 1 << 7 ; some generic constants .equ bm_USART_RXRD = 1 << RXC .equ bm_USART_TXRD = 1 << UDRE .equ bm_ENABLE_TX = 1 << TXEN .equ bm_ENABLE_RX = 1 << RXEN .equ bm_ENABLE_INT_RX = 1<