Module com.pi4j.plugin.linuxfs

Package com.pi4j.plugin.linuxfs.provider.i2c

Class LinuxFsI2CBus

java.lang.Object

com.pi4j.plugin.linuxfs.provider.i2c.LinuxFsI2CBus

public class LinuxFsI2CBus
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final long	DEFAULT_LOCK_ACQUIRE_TIMEOUT
static final TimeUnit	DEFAULT_LOCK_ACQUIRE_TIMEOUT_UNITS
protected LinuxFile	file	File handle for this i2c bus
protected long	lockAquireTimeout
protected TimeUnit	lockAquireTimeoutUnit
protected org.slf4j.Logger	logger

Constructor Summary

Constructors

Constructor	Description
LinuxFsI2CBus(I2CConfig config)

Method Summary

Modifier and Type	Method	Description
<R> R	execute(I2C i2c, CheckedFunction<LinuxFile,R> action)
int	executeIOCTL(I2C i2c, long command, ByteBuffer data, IntBuffer offsets)
protected void	selectBusSlave(I2C i2c)	Selects the slave device if not already selected on this bus.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

DEFAULT_LOCK_ACQUIRE_TIMEOUT

public static final long DEFAULT_LOCK_ACQUIRE_TIMEOUT

See Also:

• Constant Field Values

DEFAULT_LOCK_ACQUIRE_TIMEOUT_UNITS

public static final TimeUnit DEFAULT_LOCK_ACQUIRE_TIMEOUT_UNITS

logger

protected org.slf4j.Logger logger

file

protected LinuxFile file

File handle for this i2c bus

lockAquireTimeout

protected long lockAquireTimeout

lockAquireTimeoutUnit

protected TimeUnit lockAquireTimeoutUnit

Constructor Details

LinuxFsI2CBus

public LinuxFsI2CBus(I2CConfig config)

Method Details

selectBusSlave

protected void selectBusSlave(I2C i2c)
                       throws IOException

Selects the slave device if not already selected on this bus. Runs the required ioctl's via JNI.

Parameters:

i2c - Device to select

Throws:

IOException

executeIOCTL

public int executeIOCTL(I2C i2c,
 long command,
 ByteBuffer data,
 IntBuffer offsets)

Parameters:

i2c -

command - From I2CConstants

data - values in bytes for all structures, with 4 or 8 byte alignment enforced by filling holes before pointers

offsets - ByteBuffer: offsets of pointer/ byte offset of pointedToData

Returns:

0 if success, else -1

execute

public <R> R execute(I2C i2c,
 CheckedFunction<LinuxFile,R> action)