spi_dma.c File Reference

#include "chip.h"

Go to the source code of this file.

Defines
#define	USE_SPI_DMA
#define	DMA_SPI_LLI   2
Functions
uint32_t	SPID_Configure (Spid *pSpid, Spi *pSpiHw, uint8_t spiId, uint32_t spiMode, sXdmad *pXdmad)
	Initializes the Spid structure and the corresponding SPI & DMA hardware. select value. The driver will uses DMA channel 0 for RX and DMA channel 1 for TX. The DMA channels are freed automatically when no SPI command processing.
void	SPID_ConfigureCS (Spid *pSpid, uint32_t dwCS, uint32_t dwCsr)
	Configures the parameters for the device corresponding to the cs value.
uint32_t	SPID_SendCommand (Spid *pSpid, SpidCmd *pCommand)
	Starts a SPI master transfer. This is a non blocking function. It will return as soon as the transfer is started.
uint32_t	SPID_IsBusy (const Spid *pSpid)
	Check if the SPI driver is busy.

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Detailed Description

Implementation for the SPI Flash with xDMA driver.

Definition in file spi_dma.c.

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Define Documentation

#define DMA_SPI_LLI   2

xDMA Link List size for SPI transmission

Definition at line 69 of file spi_dma.c.

#define USE_SPI_DMA

xDMA support

Definition at line 66 of file spi_dma.c.

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Function Documentation

uint32_t SPID_Configure	(	Spid *	pSpid,
		Spi *	pSpiHw,
		uint8_t	spiId,
		uint32_t	spiMode,
		sXdmad *	pXdmad
	)

Initializes the Spid structure and the corresponding SPI & DMA hardware. select value. The driver will uses DMA channel 0 for RX and DMA channel 1 for TX. The DMA channels are freed automatically when no SPI command processing.

Parameters:

	pSpid	Pointer to a Spid instance.
	pSpiHw	Associated SPI peripheral.
	spiId	SPI peripheral identifier.
	pDmad	Pointer to a Dmad instance.

Definition at line 282 of file spi_dma.c.

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void SPID_ConfigureCS	(	Spid *	pSpid,
		uint32_t	dwCS,
		uint32_t	dwCsr
	)

Configures the parameters for the device corresponding to the cs value.

Parameters:

	pSpid	Pointer to a Spid instance.
	cs	number corresponding to the SPI chip select.
	csr	SPI_CSR value to setup.

Definition at line 309 of file spi_dma.c.

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uint32_t SPID_IsBusy

(

const Spid *

pSpid

)

Check if the SPI driver is busy.

Parameters:

pSpid

Pointer to a Spid instance.

Returns:

1 if the SPI driver is currently busy executing a command; otherwise

Definition at line 387 of file spi_dma.c.

uint32_t SPID_SendCommand	(	Spid *	pSpid,
		SpidCmd *	pCommand
	)

Starts a SPI master transfer. This is a non blocking function. It will return as soon as the transfer is started.

Parameters:

	pSpid	Pointer to a Spid instance.
	pCommand	Pointer to the SPI command to execute.

Returns:

0 if the transfer has been started successfully; otherwise returns SPID_ERROR_LOCK is the driver is in use, or SPID_ERROR if the command is not valid.

Definition at line 335 of file spi_dma.c.

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