#include <modm/driver/gpio/mcp23_transport.hpp>

Inheritance diagram for modm::Mcp23TransportI2c< I2cMaster >:

Public Member Functions
	Mcp23TransportI2c (uint8_t address)

void	attachConfigurationHandler (I2c::ConfigurationHandler handler)

bool	ping ()

bool	read (uint8_t *buffer, std::size_t size)
	Starts a write transaction and waits until finished.

void	setAddress (uint8_t address)

bool	write (const uint8_t *buffer, std::size_t size)
	Starts a write transaction and waits until finished.

bool	writeRead (const uint8_t writeBuffer, std::size_t writeSize, uint8_t readBuffer, std::size_t readSize)
	Starts a write-read transaction and waits until finished.

Protected Member Functions
bool	write (uint8_t reg, uint8_t value)
	write a 8bit value

bool	write16 (uint8_t reg, uint16_t value)
	write a 16bit value

bool	read (uint8_t reg, uint8_t &value)
	read a 8bit value

bool	read (uint8_t reg, uint8_t *buffer, uint8_t length)
	read multiple 8bit values from a start register

bool	isTransactionRunning ()

bool	runTransaction ()
	Starts our own transaction and waits until finished.

bool	startTransaction ()
	Starts the transaction with our own transaction object.

bool	startTransaction (modm::I2cTransaction *transaction)
	Starts the transaction with a separate transaction object.

bool	wasTransactionSuccessful ()

Detailed Description

MCP23xxx I2C Transport Layer.

This class manages communication with the gpio expander via the I2C bus.

The I2C interface is compliant with Fast Mode (up to 400kHz).

Member Function Documentation

void modm::I2cDevice< I2cMaster, 10 , I2cWriteReadTransaction >::attachConfigurationHandler ( I2c::ConfigurationHandler handler )

inheritedinline

Attaches a configuration handler, which is called before a transaction, whenever the configuration has to be changed.

bool modm::I2cDevice< I2cMaster, 10 , I2cWriteReadTransaction >::isTransactionRunning ( )

inheritedinlineprotected

bool modm::I2cDevice< I2cMaster, 10 , I2cWriteReadTransaction >::ping ( )

inheritedinline

Return Values

true	device responds to address
false	no device with address found

void modm::I2cDevice< I2cMaster, 10 , I2cWriteReadTransaction >::setAddress ( uint8_t address )

inheritedinline

Sets a new address of the slave device.

Parameters

address the slave address not yet shifted left (address < 128).

bool modm::I2cDevice< I2cMaster, 10 , I2cWriteReadTransaction >::wasTransactionSuccessful ( )

inheritedinlineprotected

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