1 FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint16_t USART_FLAG)
 2 {
 3   FlagStatus bitstatus = RESET;
 4   /* Check the parameters */
 5   assert_param(IS_USART_ALL_PERIPH(USARTx));
 6   assert_param(IS_USART_FLAG(USART_FLAG));
 7
 8   /* The CTS flag is not available for UART4 and UART5 */
 9   if (USART_FLAG == USART_FLAG_CTS)
10   {
11     assert_param(IS_USART_1236_PERIPH(USARTx));
12   }
13
14   if ((USARTx->SR & USART_FLAG) != (uint16_t)RESET)
15   {
16     bitstatus = SET;
17   }
18   else
19   {
20     bitstatus = RESET;
21   }
22   return bitstatus;
23 }

 1 ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint16_t USART_IT)
 2 {
 3   uint32_t bitpos = 0x00, itmask = 0x00, usartreg = 0x00;
 4   ITStatus bitstatus = RESET;
 5   /* Check the parameters */
 6   assert_param(IS_USART_ALL_PERIPH(USARTx));
 7   assert_param(IS_USART_GET_IT(USART_IT));
 8
 9   /* The CTS interrupt is not available for UART4 and UART5 */
10   if (USART_IT == USART_IT_CTS)
11   {
12     assert_param(IS_USART_1236_PERIPH(USARTx));
13   }
14
15   /* Get the USART register index */
16   usartreg = (((uint8_t)USART_IT) >> 0x05);
17   /* Get the interrupt position */
18   itmask = USART_IT & IT_MASK;
19   itmask = (uint32_t)0x01 << itmask;
20
21   if (usartreg == 0x01) /* The IT  is in CR1 register */
22   {
23     itmask &= USARTx->CR1;
24   }
25   else if (usartreg == 0x02) /* The IT  is in CR2 register */
26   {
27     itmask &= USARTx->CR2;
28   }
29   else /* The IT  is in CR3 register */
30   {
31     itmask &= USARTx->CR3;
32   }
33
34   bitpos = USART_IT >> 0x08;
35   bitpos = (uint32_t)0x01 << bitpos;
36   bitpos &= USARTx->SR;
37   if ((itmask != (uint16_t)RESET)&&(bitpos != (uint16_t)RESET))
38   {
39     bitstatus = SET;
40   }
41   else
42   {
43     bitstatus = RESET;
44   }
45
46   return bitstatus;
47 }