lejos.hardware.port

Interface I2CPort

All Superinterfaces:

java.lang.AutoCloseable, BasicSensorPort, java.io.Closeable, IOPort, SensorConstants

All Known Implementing Classes:

RemoteI2CPort, RemoteNXTI2CPort, RemoteRequestI2CPort

public interface I2CPort
extends IOPort, BasicSensorPort

Abstraction for a port that supports I2C sensors.

Author:

Lawrie Griffiths

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_IO Maximum read/write request length

Fields inherited from interface lejos.hardware.sensor.SensorConstants

BLACK, BLANK_INDEX, BLUE, BLUE_INDEX, BROWN, GREEN, GREEN_INDEX, MAX_TYPE, MIN_TYPE, MODE_RAW, NXT_ADC_RES, RED, RED_INDEX, TYPE_ANGLE, TYPE_COLORBLUE, TYPE_COLORFULL, TYPE_COLORGREEN, TYPE_COLORNONE, TYPE_COLORRED, TYPE_CUSTOM, TYPE_HIGHSPEED, TYPE_HIGHSPEED_9V, TYPE_HISPEED, TYPE_LIGHT_ACTIVE, TYPE_LIGHT_INACTIVE, TYPE_LOWSPEED, TYPE_LOWSPEED_9V, TYPE_NO_SENSOR, TYPE_REFLECTION, TYPE_SOUND_DB, TYPE_SOUND_DBA, TYPE_SWITCH, TYPE_TEMPERATURE, WHITE, YELLOW

Method Summary

Modifier and Type	Method and Description
void	i2cTransaction(int deviceAddress, byte[] writeBuf, int writeOffset, int writeLen, byte[] readBuf, int readOffset, int readLen) High level i2c interface.

Methods inherited from interface lejos.hardware.port.IOPort

close, getName, setPinMode

Methods inherited from interface lejos.hardware.port.BasicSensorPort

getMode, getType, setMode, setType, setTypeAndMode

Field Detail

MAX_IO

static final int MAX_IO

Maximum read/write request length

See Also:

Constant Field Values

Method Detail

i2cTransaction

void i2cTransaction(int deviceAddress,
                    byte[] writeBuf,
                    int writeOffset,
                    int writeLen,
                    byte[] readBuf,
                    int readOffset,
                    int readLen)

High level i2c interface. Perform a complete i2c transaction and return the results. Writes the specified data to the device and then reads the requested bytes from it.

Parameters:

deviceAddress - The I2C device address.

writeBuf - The buffer containing data to be written to the device.

writeOffset - The offset of the data within the write buffer

writeLen - The number of bytes to write.

readBuf - The buffer to use for the transaction results

readOffset - Location to write the results to

readLen - The length of the read