at91_spi.h File Reference

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SPI Control Register
#define	SPI_CR_OFF   0x00000000
	Control register offset.
#define	SPI_SPIEN   0x00000001
	SPI enable.
#define	SPI_SPIDIS   0x00000002
	SPI disable.
#define	SPI_SWRST   0x00000080
	Software reset.
#define	SPI_LASTXFER   0x01000000
	Last transfer.
SPI Mode Register
#define	SPI_MR_OFF   0x00000004
	Mode register offset.
#define	SPI_MSTR   0x00000001
	Master mode.
#define	SPI_PS   0x00000002
	Peripheral select.
#define	SPI_PCSDEC   0x00000004
	Chip select decode.
#define	SPI_FDIV   0x00000008
	Clock selection.
#define	SPI_MODFDIS   0x00000010
	Mode fault detection.
#define	SPI_LLB   0x00000080
	Local loopback enable.
#define	SPI_PCS   0x000F0000
	Peripheral chip select mask.
#define	SPI_PCS_0   0x000E0000
	Peripheral chip select 0.
#define	SPI_PCS_1   0x000D0000
	Peripheral chip select 1.
#define	SPI_PCS_2   0x000B0000
	Peripheral chip select 2.
#define	SPI_PCS_3   0x00070000
	Peripheral chip select 3.
#define	SPI_PCS_LSB   16
	Least significant bit of peripheral chip select.
#define	SPI_DLYBCS   0xFF000000
	Mask for delay between chip selects.
#define	SPI_DLYBCS_LSB   24
	Least significant bit of delay between chip selects.
SPI Receive Data Register
#define	SPI_RDR_OFF   0x00000008
	Receive data register offset.
#define	SPI_RD   0x0000FFFF
	Receive data mask.
#define	SPI_RD_LSB   0
	Least significant bit of receive data.
SPI Transmit Data Register
#define	SPI_TDR_OFF   0x0000000C
	Transmit data register offset.
#define	SPI_TD   0x0000FFFF
	Transmit data mask.
#define	SPI_TD_LSB   0
	Least significant bit of transmit data.
SPI Status and Interrupt Register
#define	SPI_SR_OFF   0x00000010
	Status register offset.
#define	SPI_IER_OFF   0x00000014
	Interrupt enable register offset.
#define	SPI_IDR_OFF   0x00000018
	Interrupt disable register offset.
#define	SPI_IMR_OFF   0x0000001C
	Interrupt mask register offset.
#define	SPI_RDRF   0x00000001
	Receive data register full.
#define	SPI_TDRE   0x00000002
	Transmit data register empty.
#define	SPI_MODF   0x00000004
	Mode fault error.
#define	SPI_OVRES   0x00000008
	Overrun error status.
#define	SPI_ENDRX   0x00000010
	End of RX buffer.
#define	SPI_ENDTX   0x00000020
	End of TX buffer.
#define	SPI_RXBUFF   0x00000040
	RX buffer full.
#define	SPI_TXBUFE   0x00000080
	TX buffer empty.
#define	SPI_NSSR   0x00000100
	NSS rising.
#define	SPI_TXEMPTY   0x00000200
	Transmission register empty.
#define	SPI_SPIENS   0x00010000
	SPI enable status.
SPI Chip Select Registers
#define	SPI_CSR0_OFF   0x00000030
	Chip select register 0 offset.
#define	SPI_CSR1_OFF   0x00000034
	Chip select register 1 offset.
#define	SPI_CSR2_OFF   0x00000038
	Chip select register 2 offset.
#define	SPI_CSR3_OFF   0x0000003C
	Chip select register 3 offset.
#define	SPI_CPOL   0x00000001
	Clock polarity.
#define	SPI_NCPHA   0x00000002
	Clock phase.
#define	SPI_CSAAT   0x00000008
	Chip select active after transfer.
#define	SPI_BITS   0x000000F0
	Bits per transfer mask.
#define	SPI_BITS_8   0x00000000
	8 bits per transfer.
#define	SPI_BITS_9   0x00000010
	9 bits per transfer.
#define	SPI_BITS_10   0x00000020
	10 bits per transfer.
#define	SPI_BITS_11   0x00000030
	11 bits per transfer.
#define	SPI_BITS_12   0x00000040
	12 bits per transfer.
#define	SPI_BITS_13   0x00000050
	13 bits per transfer.
#define	SPI_BITS_14   0x00000060
	14 bits per transfer.
#define	SPI_BITS_15   0x00000070
	15 bits per transfer.
#define	SPI_BITS_16   0x00000080
	16 bits per transfer.
#define	SPI_BITS_LSB   4
	Least significant bit of bits per transfer.
#define	SPI_SCBR   0x0000FF00
	Serial clock baud rate mask.
#define	SPI_SCBR_LSB   8
	Least significant bit of serial clock baud rate.
#define	SPI_DLYBS   0x00FF0000
	Delay before SPCK mask.
#define	SPI_DLYBS_LSB   16
	Least significant bit of delay before SPCK.
#define	SPI_DLYBCT   0xFF000000
	Delay between consecutive transfers mask.
#define	SPI_DLYBCT_LSB   24
	Least significant bit of delay between consecutive transfers.