Hi,
register names and bit names have a numeric value inside, e.g. UCSR0A, UDRE0, where 0 is the USART number. On the Mega you have four of them, numbered 0 to 3.
Hi,
register names and bit names have a numeric value inside, e.g. UCSR0A, UDRE0, where 0 is the USART number. On the Mega you have four of them, numbered 0 to 3.