/* Select the SCK pin as the source of baudrate for the USART SPI slave mode.  */
static void usart_set_spi_slave_baudrate(Usart *p_usart)
/* Select the SCK pin as the source of baudrate for the USART SPI slave mode.  */
static void usart_set_spi_slave_baudrate(Usart *p_usart)
{
	p_usart->US_MR &= ~US_MR_USCLKS_Msk;
	p_usart->US_MR |= US_MR_USCLKS_SCK;
}