DMA transfers management functions

DMA transfers management functions. More...

Collaboration diagram for DMA transfers management functions:

Functions
void	USART_DMACmd (USART_TypeDef *USARTx, uint32_t USART_DMAReq, FunctionalState NewState)
	Enables or disables the USART's DMA interface. More...
void	USART_DMAReceptionErrorConfig (USART_TypeDef *USARTx, uint32_t USART_DMAOnError)
	Enables or disables the USART's DMA interface when reception error occurs. More...

Detailed Description

DMA transfers management functions.

 ===============================================================================
               ##### DMA transfers management functions #####
 ===============================================================================
    [..] This section provides two functions that can be used only in DMA mode.
    [..] In DMA Mode, the USART communication can be managed by 2 DMA Channel 
         requests:
         (#) USART_DMAReq_Tx: specifies the Tx buffer DMA transfer request.
         (#) USART_DMAReq_Rx: specifies the Rx buffer DMA transfer request.
    [..] In this Mode it is advised to use the following function:
         (+) void USART_DMACmd(USART_TypeDef* USARTx, uint16_t USART_DMAReq, 
             FunctionalState NewState).

Function Documentation

void USART_DMACmd	(	USART_TypeDef *	USARTx,
		uint32_t	USART_DMAReq,
		FunctionalState	NewState
	)

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

Definition at line 1607 of file stm32f30x_usart.c.

void USART_DMAReceptionErrorConfig	(	USART_TypeDef *	USARTx,
		uint32_t	USART_DMAOnError
	)

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: USART_DMAOnError_Enable: DMA receive request enabled when the USART DMA reception error is asserted. USART_DMAOnError_Disable: DMA receive request disabled when the USART DMA reception error is asserted.

Return values

None

Definition at line 1640 of file stm32f30x_usart.c.