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title: Spi_ChannelObjType summary: SPI Channel object structure.

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Spi_ChannelObjType

SPI Channel object structure.

#include <Spi_Priv.h>

Structure Members

Member Type	Member name	Brief
const Spi_ChannelConfigType *	chCfg	SPI channel config passed during init.
const Spi_DataBufferType *	txBufPtr	TX buffer pointer given by user. This should be persistent.
Spi_DataBufferType *	rxBufPtr	RX buffer pointer given by user. This should be persistent.
Spi_DataBufferType[SPI_IB_MAX_LENGTH]	txIb	Internal TX buffer.
Spi_DataBufferType[SPI_IB_MAX_LENGTH]	rxIb	Internal RX buffer.
const uint8 *	curTxBufPtr	Current TX buffer pointer.
uint8 *	curRxBufPtr	Current RX buffer pointer.
Spi_NumberOfDataType	numWordsTxRx	Number of words to transfer.
Spi_NumberOfDataType	curTxWords	Number of words transmitted. We need separate counters for TX/RX because when FIFO in enabled, TX writes happen in advance where as RX will happen on actual received data.
Spi_NumberOfDataType	curRxWords	Number of words received.
Spi_BufferWidthType	bufWidth	Width of buffer in bytes-used for accessing the TX/RX buffer. When dataWidth < 9, bufWidth = uint8 (1 bytes) When dataWidth >= 9 && < 17, bufWidth = uint16 (2 bytes)
uint16	effTxFifoDepth	Effective TX FIFO depth in words - depends on dataWidth.
uint16	dataWidthBitMask	Data width mask depending on SPI word size.