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Microcontroller Programming » Nerdkit UART: 115200 --> 9600 baud rate

April 01, 2013
by oshjdf
oshjdf's Avatar

Line 15 in uart.c:

UBRR0L = 7; // for 115200bps with 14.7456MHz clock

How to set baud rate to 9600?

April 01, 2013
by pcbolt
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Hi oshjdf -

The formula for computing baud setting in normal operation mode is:

UBRR0L = (ClockFreq / (16 * BaudRate)) - 1

So for your example :

UBRR0L = (14745600 / (16*9600)) - 1 = 95
April 01, 2013
by oshjdf
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Thanks pcbolt.

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