DMA transfers management functions.
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DMA transfers management functions.
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##### DMA transfers management functions #####
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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
-
- 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
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Definition at line 1009 of file stm32f4xx_spi.c.
void SPI_LastDMATransferCmd |
( |
SPI_TypeDef * |
SPIx, |
|
|
uint16_t |
SPI_LastDMATransfer |
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) |
| |
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
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Definition at line 1125 of file stm32f30x_spi.c.