Re: [avr-chat] Trouble with USART0 on ATmega644A

[Yuriy Vlasenko]

By the way, if the calculation is performed during the program run, I think this is better:

UBRR = (((F_CPU + (ULONG)UART_BAUD_RATE<<3)) >> 4) / UART_BAUD_RATE - 1;

Here we exclude 2 multiplications of LONG vars. 

2011/1/6 Bob Paddock <address@hidden>

May or may not be relevant to your case:

http://www.nongnu.org/avr-libc/user-manual/FAQ.html#faq_wrong_baud_rate