3.7 Setting the UART Baud Rate

The value of the BAUD_VALUE_115200 macro in the hw_platform.h file must be defined according to the system clock frequency to achieve the UART baud rate of 115200. The baud value is calculated using the following formula.

BAUD_VALUE = (CLOCK / (16 * BAUD_RATE)) - 1

To define the system clock frequency:

Look for #define SYS_CLK_FREQ statement in the hw_platform.h file.

Define it as:

#define SYS_CLK_FREQ 83333000UL

The SYS_CLK_FREQ value must be same as that of the clock generated in the design.

The following figure shows the system clock frequency definition.