spi.c File Reference

#include "spi/spi.h"
#include "bsp.h"

Go to the source code of this file.

Overview

SPI driver implementation.

Implements the functions defined in spi.h for controlling SPI input/output and interrupts on the EfxSapphireSoC platform.

Copyright

2013-2026 Efinix Inc. All rights reserved.
See the full License Information for Efinix and SaxonSoc MIT terms.

Definition in file spi.c.

Functions
void	spi_setDataMode (spi_instance_t *inst, enum cfg_mode Mode)
	Set SPI Data Mode (Full/Half Duplex, Dual/Quad Line).
u32	spi_cmdAvailability (spi_instance_t *inst)
	Returns the availability of command buffer space in the SPI buffer.
u32	spi_rspOccupancy (spi_instance_t *inst)
	Returns the occupancy of the response buffer in the SPI buffer.
u32	spi_read32 (spi_instance_t *inst)
	Reads a 32-bit data value from the SPI read register.
u32	spi_writeRead32 (spi_instance_t *inst, u32 data)
	Writes data to and reads data from the SPI data register.
u8	spi_read (spi_instance_t *inst)
	Reads an 8-bit data value from the SPI read register.
u8	spi_writeRead (spi_instance_t *inst, u8 data)
	Writes data to and reads data from the SPI data register.
void	spi_applyConfig (spi_instance_t *inst)
	Applies the current configuration settings stored in the spi_instance_t structure to the SPI hardware registers.
void	spi_write (spi_instance_t *inst, u8 data)
	Writes an 8-bit data value to the SPI data register.
void	spi_write32 (spi_instance_t *inst, u32 data)
	Writes a 32-bit data value to the SPI data register.
void	spi_select (spi_instance_t *inst, u32 cs)
	Selects the SPI slave by asserting the corresponding chip select (CS) line.
void	spi_diselect (spi_instance_t *inst, u32 cs)
	Deselects the SPI slave by deasserting the corresponding chip select (CS) line.
u32	spi_isBusy (spi_instance_t *inst)
	Check SPI if it has any command waiting to be executed in queue.
void	spi_waitUntilIdle (spi_instance_t *inst)
	Waits for SPI if it has any command waiting to be executed in queue.