ST STM32F31xx

UM1581
Universal synchronous asynchronous receiver
transmitter (USART)
DocID023800 Rev 1
553/584
de-activation of the DE signal
Return values
 None.
Notes
 None.
23.2.16 DMA transfers management functions
23.2.16.1 USART_DMACmd
Function Name
void USART_DMACmd ( USART_TypeDef * USARTx, uint32_t
USART_DMAReq, FunctionalState NewState)
Function Description
Enables or disables the USART's DMA interface.
Parameters
 USARTx : Select the USART peripheral. This parameter can
be one of the following values: USART1 or USART2 or
USART3 or UART4.
 USART_DMAReq : specifies the DMA request. This
parameter can be any combination of the following values:
 USART_DMAReq_Tx : USART DMA transmit request
 USART_DMAReq_Rx : USART DMA receive request
 NewState : new state of the DMA Request sources. This
parameter can be: ENABLE or DISABLE.
Return values
 None.
Notes
 None.
23.2.16.2 USART_DMAReceptionErrorConfig
Function Name
void USART_DMAReceptionErrorConfig ( USART_TypeDef *
USARTx, uint32_t USART_DMAOnError)
Function Description
Enables or disables the USART's DMA interface when reception
error occurs.
Parameters
 USARTx : Select the USART peripheral. This parameter can
be one of the following values: USART1 or USART2 or
USART3 or UART4.
 USART_DMAOnError : specifies the DMA status in case of
reception error. This parameter can be any combination of the
following values: