Detailed Description

Device driver for the NXP SC18IS602B I2C-to-SPI bridge.

The SC18IS602B is an SPI master that is controlled through an I2C bus, allowing indirect control of downstream SPI peripherals. This driver concerts each SPI transaction into a series of I2C commands.

Note: One SPI transaction at a time; no queueing is provided.

Reference: https://www.nxp.com/docs/en/data-sheet/SC18IS602B.pdf

Definition at line 23 of file i2c_sc18s602.h.

#include <i2c_sc18s602.h>

Inheritance diagram for satcat5::device::i2c::Sc18is602:

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Collaboration diagram for satcat5::device::i2c::Sc18is602:

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Public Member Functions
	Sc18is602 (satcat5::cfg::I2cGeneric *i2c, const satcat5::util::I2cAddr &devaddr)
	Constructor links to specified control register.

bool	configure (unsigned spi_mode)
	Configure the SPI mode (0/1/2/3 sets CPOL, CPHA)

bool	busy () override
	Is the SPI controller currently busy?

bool	exchange (u8 devidx, const u8 wrdata, u8 rwbytes, satcat5::cfg::SpiEventListener callback=0) override
	Queue a read-and-write SPI bus transaction. More...

bool	query (u8 devidx, const u8 wrdata, u8 wrbytes, u8 rdbytes, satcat5::cfg::SpiEventListener callback=0) override
	Queue a write-then-read SPI bus transaction. More...

Protected Member Functions
void	i2c_done (bool noack, const satcat5::util::I2cAddr &devaddr, u32 regaddr, unsigned nread, const u8 *rdata) override

bool	execute (u8 devidx, const u8 *wrdata, u8 rwbytes, u8 skip)

Protected Attributes
satcat5::cfg::I2cGeneric *const	m_parent

const satcat5::util::I2cAddr	m_devaddr

satcat5::cfg::SpiEventListener *	m_callback

u8	m_busy

u8	m_skip

Member Function Documentation

◆ exchange()

bool Sc18is602::exchange	(	u8	devidx,
		const u8 *	wrdata,
		u8	rwbytes,
		satcat5::cfg::SpiEventListener *	callback = `0`
	)

overridevirtual

Queue a read-and-write SPI bus transaction.

Write N bytes and concurrently read N bytes.

Implements satcat5::cfg::SpiGeneric.

Definition at line 53 of file i2c_sc18s602.cc.

◆ query()

bool Sc18is602::query	(	u8	devidx,
		const u8 *	wrdata,
		u8	wrbytes,
		u8	rdbytes,
		satcat5::cfg::SpiEventListener *	callback = `0`
	)

overridevirtual

Queue a write-then-read SPI bus transaction.

Write N bytes and then read M bytes.

Implements satcat5::cfg::SpiGeneric.

Definition at line 70 of file i2c_sc18s602.cc.

The documentation for this class was generated from the following files:

Detailed Description

Public Member Functions

Protected Member Functions

Protected Attributes

Member Function Documentation

◆ exchange()

◆ query()