.equ BAUDRATE_LOW = UBRR2L .equ BAUDRATE_HIGH = UBRR2H .equ USART_C = UCSR2C .equ USART_B = UCSR2B .equ USART_A = UCSR2A .equ USART_DATA = UDR2 .equ URXCaddr = URXC2addr .equ UDREaddr = UDRE2addr .equ bm_USART_RXRD = 1 << RXC2 .equ bm_USART_TXRD = 1 << UDRE2 .equ bm_ENABLE_TX = 1 << TXEN2 .equ bm_ENABLE_RX = 1 << RXEN2 .equ bm_ENABLE_INT_RX = 1<