lejos.hardware.port

Interface UARTPort

All Superinterfaces:

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

All Known Implementing Classes:

RemoteRequestUARTPort, RemoteUARTPort

public interface UARTPort
extends IOPort, BasicSensorPort

Field Summary

Fields

Modifier and Type	Field and Description
static int	UART_RAW_MODE

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
byte	getByte() read a single byte from the device
void	getBytes(byte[] vals, int offset, int len) read a number of bytes from the device
java.lang.String	getModeName(int mode) Get the string name of the specified mode.
int	getShort() read a single short from the device.
void	getShorts(short[] vals, int offset, int len) read a number of shorts from the device
boolean	initialiseSensor(int mode) Initialise the attached sensor and set it to the required operating mode. Note: This method is not normally needed as the sensor will be initialised when it is opened.
int	rawRead(byte[] buffer, int offset, int len) Read bytes from the uart port.
int	rawWrite(byte[] buffer, int offset, int len) Attempt to write a series of bytes to the uart port.
void	resetSensor() Reset the attached sensor.
void	setBitRate(int bitRate) Set the bit rate of the port when operating in RAW mode.
java.lang.String	toString() Return the current sensor reading to a string.
int	write(byte[] buffer, int offset, int len) Write bytes to the sensor

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

UART_RAW_MODE

static final int UART_RAW_MODE

See Also:

Constant Field Values

Method Detail

getByte

byte getByte()

read a single byte from the device

Returns:

the byte value

getBytes

void getBytes(byte[] vals,
              int offset,
              int len)

read a number of bytes from the device

Parameters:

vals - byte array to accept the data

offset - offset at which to store the data

len - number of bytes to read

getShort

int getShort()

read a single short from the device.

Returns:

the short value

getShorts

void getShorts(short[] vals,
               int offset,
               int len)

read a number of shorts from the device

Parameters:

vals - short array to accept the data

offset - offset at which to store the data

len - number of shorts to read

getModeName

java.lang.String getModeName(int mode)

Get the string name of the specified mode.

TODO: Make other mode data available.

Parameters:

mode - mode to lookup

Returns:

String version of the mode name

toString

java.lang.String toString()

Return the current sensor reading to a string.

Overrides:

toString in class java.lang.Object

initialiseSensor

boolean initialiseSensor(int mode)

Initialise the attached sensor and set it to the required operating mode.
Note: This method is not normally needed as the sensor will be initialised when it is opened. However it may be of use if the sensor needs to be reset or in other cases.

Parameters:

mode - target mode

Returns:

true if ok false if error

resetSensor

void resetSensor()

Reset the attached sensor. Following this the sensor must be initialised before it can be used.

write

int write(byte[] buffer,
          int offset,
          int len)

Write bytes to the sensor

Parameters:

buffer - bytes to be written

offset - offset to the start of the write

len - length of the write

Returns:

number of bytes written

rawRead

int rawRead(byte[] buffer,
            int offset,
            int len)

Read bytes from the uart port. If no bytes are available return 0.

Note: The port must have been set into RAW mode to use this method.

Parameters:

buffer - The buffer to store the read bytes

offset - The offset at which to start storing the bytes

len - The maximum number of bytes to read

Returns:

The actual number of bytes read

rawWrite

int rawWrite(byte[] buffer,
             int offset,
             int len)

Attempt to write a series of bytes to the uart port. This call is non-blocking if there is no space in the write buffer a count of 0 is returned.

Note: The port must have been set into RAW mode before attempting to use the method.

Parameters:

buffer - The buffer containing the bytes to write

offset - The offset of the first byte

len - The number of bytes to attempt to write

Returns:

The actual number of bytes written

setBitRate

void setBitRate(int bitRate)

Set the bit rate of the port when operating in RAW mode.

Parameters:

bitRate - The new bit rate