/* USART check if Received Data Available. 
Check if data buffer holds a valid received data word. */
bool usart_is_recv_ready(uint32_t usart)
/* USART check if Received Data Available. 
Check if data buffer holds a valid received data word. */
bool usart_is_recv_ready(uint32_t usart)
{
	return (USART_SR(usart) & USART_SR_RXNE);
}