/* USART Disable. 
At the end of the current frame, the USART is disabled to reduce power. */
void usart_disable(uint32_t usart)
/* USART Disable. 
At the end of the current frame, the USART is disabled to reduce power. */
void usart_disable(uint32_t usart)
{
	USART_CR1(usart) &= ~USART_CR1_UE;
}