spi_state_t Struct Reference

One SPI_B channel: register shadow + a single-frame echo engine. More...

Data Fields
uint32_t	reg [k_spi_reg_words]
	Reflect-on-read register shadow.
uint32_t	spsr
	SPSR flags (SPTEF / SPRF / ...).
uint32_t	rx
	Receive holding register (echoed word).
bool	enabled
	SPCR.SPE: channel is running.
bool	loopback
	SPCR2.SPLP/SPLP2: internal rx = tx tie.
uint32_t	frames
	Frames echoed through this channel.

Detailed Description

One SPI_B channel: register shadow + a single-frame echo engine.

The model owns the registers the polling driver actually touches; the rest of the window reflects writes through reg. enabled tracks SPCR.SPE so the status flags only report ready once the channel is running, loopback latches SPCR2.SPLP/SPLP2 (the internal tie the example arms), rx holds the most recently echoed word an SPDR read returns, and spsr carries the SPTEF / SPRF flags the driver waits on (cleared through SPSRC).

Definition at line 109 of file board_periph_spi.c.

Field Documentation

enabled

bool spi_state_t::enabled

SPCR.SPE: channel is running.

Definition at line 113 of file board_periph_spi.c.

Referenced by internal_spi_spcr_write(), and internal_spi_spsrc_write().

frames

uint32_t spi_state_t::frames

Frames echoed through this channel.

Definition at line 115 of file board_periph_spi.c.

Referenced by internal_spi_spdr_write().

loopback

bool spi_state_t::loopback

SPCR2.SPLP/SPLP2: internal rx = tx tie.

Definition at line 114 of file board_periph_spi.c.

Referenced by internal_spi_spcr2_write(), and internal_spi_spdr_write().

reg

uint32_t spi_state_t::reg[k_spi_reg_words]

Reflect-on-read register shadow.

Definition at line 110 of file board_periph_spi.c.

Referenced by internal_spi_reg_read(), internal_spi_reg_write(), and internal_spi_spdr_write().

rx

uint32_t spi_state_t::rx

Receive holding register (echoed word).

Definition at line 112 of file board_periph_spi.c.

Referenced by internal_spi_reg_read(), and internal_spi_spdr_write().

spsr

uint32_t spi_state_t::spsr

SPSR flags (SPTEF / SPRF / ...).

Definition at line 111 of file board_periph_spi.c.

Referenced by internal_spi_reg_read(), internal_spi_spcr_write(), internal_spi_spdr_write(), and internal_spi_spsrc_write().

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The documentation for this struct was generated from the following file:

• tools/ra8_emulator/src/periph/board_periph_spi.c