DMA transfers management functions

DMA transfers management functions. More...

Collaboration diagram for DMA transfers management functions:

Functions
void	SPI_I2S_DMACmd (SPI_TypeDef *SPIx, uint16_t SPI_I2S_DMAReq, FunctionalState NewState)
	Enables or disables the SPIx/I2Sx DMA interface. More...
void	SPI_LastDMATransferCmd (SPI_TypeDef *SPIx, uint16_t SPI_LastDMATransfer)
	Configures the number of data to transfer type(Even/Odd) for the DMA last transfers and for the selected SPI. More...

Detailed Description

DMA transfers management functions.

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                   ##### DMA transfers management functions #####
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Function Documentation

void SPI_I2S_DMACmd	(	SPI_TypeDef *	SPIx,
		uint16_t	SPI_I2S_DMAReq,
		FunctionalState	NewState
	)

Enables or disables the SPIx/I2Sx DMA interface.

Parameters

SPIx	To select the SPIx/I2Sx peripheral, where x can be: 1, 2, 3, 4, 5 or 6 in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.
SPI_I2S_DMAReq	specifies the SPI DMA transfer request to be enabled or disabled. This parameter can be any combination of the following values: SPI_I2S_DMAReq_Tx: Tx buffer DMA transfer request SPI_I2S_DMAReq_Rx: Rx buffer DMA transfer request
NewState	new state of the selected SPI DMA transfer request. This parameter can be: ENABLE or DISABLE.

Return values

None

Parameters

SPIx:To	select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.
SPI_I2S_DMAReq	specifies the SPI DMA transfer request to be enabled or disabled. This parameter can be any combination of the following values: SPI_I2S_DMAReq_Tx: Tx buffer DMA transfer request SPI_I2S_DMAReq_Rx: Rx buffer DMA transfer request
NewState	new state of the selected SPI DMA transfer request. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 1009 of file stm32f4xx_spi.c.

void SPI_LastDMATransferCmd	(	SPI_TypeDef *	SPIx,
		uint16_t	SPI_LastDMATransfer
	)

Configures the number of data to transfer type(Even/Odd) for the DMA last transfers and for the selected SPI.

Note

This function have a meaning only if DMA mode is selected and if the packing mode is used (data length <= 8 and DMA transfer size halfword)

Parameters

SPIx

where x can be 1, 2 or 3 to select the SPI peripheral.

SPI_LastDMATransfer

specifies the SPI last DMA transfers state. This parameter can be one of the following values: SPI_LastDMATransfer_TxEvenRxEven: Number of data for transmission Even and number of data for reception Even. SPI_LastDMATransfer_TxOddRxEven: Number of data for transmission Odd and number of data for reception Even. SPI_LastDMATransfer_TxEvenRxOdd: Number of data for transmission Even and number of data for reception Odd. SPI_LastDMATransfer_TxOddRxOdd: RNumber of data for transmission Odd and number of data for reception Odd.

Return values

None

Definition at line 1125 of file stm32f30x_spi.c.