/* USART Set Hardware Flow Control. 
The flow control bit can be selected as none, RTS, CTS or RTS+CTS. */
void usart_set_flow_control(uint32_t usart, uint32_t flowctrl)
/* USART Set Hardware Flow Control. 
The flow control bit can be selected as none, RTS, CTS or RTS+CTS. */
void usart_set_flow_control(uint32_t usart, uint32_t flowctrl)
{
	USART_CR3(usart) = (USART_CR3(usart) & ~USART_FLOWCONTROL) | flowctrl;
}