com.phidgets
Class BridgePhidget

java.lang.Object
  com.phidgets.Phidget
      com.phidgets.BridgePhidget

public final class BridgePhidget

extends Phidget

This class represents a Phidget Bridge. All methods to manipulate the Phidget Bridge are implemented in this class.

Author:

Phidgets Inc.

Field Summary

static int	PHIDGET_BRIDGE_GAIN_1 1 Gain.
static int	PHIDGET_BRIDGE_GAIN_128 128 Gain.
static int	PHIDGET_BRIDGE_GAIN_16 16 Gain.
static int	PHIDGET_BRIDGE_GAIN_32 32 Gain.
static int	PHIDGET_BRIDGE_GAIN_64 64 Gain.
static int	PHIDGET_BRIDGE_GAIN_8 8 Gain.
static int	PHIDGET_BRIDGE_GAIN_UNKNOWN Unknown Gain.

Fields inherited from class com.phidgets.Phidget

PHIDCLASS_ACCELEROMETER, PHIDCLASS_ADVANCEDSERVO, PHIDCLASS_ANALOG, PHIDCLASS_BRIDGE, PHIDCLASS_ENCODER, PHIDCLASS_FREQUENCYCOUNTER, PHIDCLASS_GPS, PHIDCLASS_INTERFACEKIT, PHIDCLASS_LED, PHIDCLASS_MOTORCONTROL, PHIDCLASS_NOTHING, PHIDCLASS_PHSENSOR, PHIDCLASS_RFID, PHIDCLASS_SERVO, PHIDCLASS_STEPPER, PHIDCLASS_TEMPERATURESENSOR, PHIDCLASS_TEXTLCD, PHIDCLASS_TEXTLED, PHIDCLASS_WEIGHTSENSOR, PHIDGET_LOG_CRITICAL, PHIDGET_LOG_DEBUG, PHIDGET_LOG_ERROR, PHIDGET_LOG_INFO, PHIDGET_LOG_VERBOSE, PHIDGET_LOG_WARNING, PHIDID_ACCELEROMETER_2AXIS, PHIDID_ACCELEROMETER_3AXIS, PHIDID_ADVANCEDSERVO_1MOTOR, PHIDID_ADVANCEDSERVO_8MOTOR, PHIDID_ANALOG_4OUTPUT, PHIDID_BIPOLAR_STEPPER_1MOTOR, PHIDID_BRIDGE_4INPUT, PHIDID_ENCODER_1ENCODER_1INPUT, PHIDID_ENCODER_HS_1ENCODER, PHIDID_ENCODER_HS_4ENCODER_4INPUT, PHIDID_FREQUENCYCOUNTER_2INPUT, PHIDID_GPS, PHIDID_INTERFACEKIT_0_0_4, PHIDID_INTERFACEKIT_0_0_8, PHIDID_INTERFACEKIT_0_16_16, PHIDID_INTERFACEKIT_0_8_8_w_LCD, PHIDID_INTERFACEKIT_2_2_2, PHIDID_INTERFACEKIT_4_8_8, PHIDID_INTERFACEKIT_8_8_8, PHIDID_INTERFACEKIT_8_8_8_w_LCD, PHIDID_IR, PHIDID_LED_64, PHIDID_LED_64_ADV, PHIDID_LINEAR_TOUCH, PHIDID_MOTORCONTROL_1MOTOR, PHIDID_MOTORCONTROL_HC_2MOTOR, PHIDID_MOTORCONTROL_LV_2MOTOR_4INPUT, PHIDID_NOTHING, PHIDID_PHSENSOR, PHIDID_RFID, PHIDID_RFID_2OUTPUT, PHIDID_RFID_2OUTPUT_READ_WRITE, PHIDID_ROTARY_TOUCH, PHIDID_SERVO_1MOTOR, PHIDID_SERVO_1MOTOR_OLD, PHIDID_SERVO_4MOTOR, PHIDID_SERVO_4MOTOR_OLD, PHIDID_SPATIAL_ACCEL_3AXIS, PHIDID_SPATIAL_ACCEL_GYRO_COMPASS, PHIDID_TEMPERATURESENSOR, PHIDID_TEMPERATURESENSOR_4, PHIDID_TEMPERATURESENSOR_IR, PHIDID_TEXTLCD_2x20, PHIDID_TEXTLCD_2x20_w_0_8_8, PHIDID_TEXTLCD_2x20_w_8_8_8, PHIDID_TEXTLCD_ADAPTER, PHIDID_TEXTLED_1x8, PHIDID_TEXTLED_4x8, PHIDID_UNIPOLAR_STEPPER_4MOTOR, PHIDID_WEIGHTSENSOR

Constructor Summary

BridgePhidget()

Method Summary

void	addBridgeDataListener(BridgeDataListener l) Adds a bridge data listener.
double	getBridgeMax(int index) Returns the maximum value that the selected bridge can measure, in mV/V.
double	getBridgeMin(int index) Returns the minimum value that the selected bridge can measure, in mV/V.
double	getBridgeValue(int index) Returns the value of the selected input, in mV/V.
int	getDataRate() Returns the data rate, in ms.
int	getDataRateMax() Gets the maximum supported data rate, in ms.
int	getDataRateMin() Gets the minimum supported data rate, in ms.
boolean	getEnabled(int index) Returns the enabled state of the specified bridge.
int	getGain(int index) Returns the gain for the selected bridge.
int	getInputCount() Returns the number of bridges.
void	removeBridgeDataListener(BridgeDataListener l)
void	setDataRate(int rate) Sets the data rate, in ms.
void	setEnabled(int index, boolean state) Sets the enabled state of the specified bridge.
void	setGain(int index, int gain) Sets the gain for the selected bridge.

Methods inherited from class com.phidgets.Phidget

addAttachListener, addDetachListener, addErrorListener, addServerConnectListener, addServerDisconnectListener, close, disableLogging, enableLogging, equals, getDeviceClass, getDeviceID, getDeviceLabel, getDeviceName, getDeviceType, getDeviceVersion, getLibraryVersion, getSerialNumber, getServerAddress, getServerID, getServerPort, isAttached, isAttachedToServer, log, open, open, open, open, open, openAny, openAny, openAny, openAny, openAny, openLabel, openLabel, openLabel, openLabel, openLabel, removeAttachListener, removeDetachListener, removeErrorListener, removeServerConnectListener, removeServerDisconnectListener, setDeviceLabel, toString, waitForAttachment, waitForAttachment

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

PHIDGET_BRIDGE_GAIN_1

public static final int PHIDGET_BRIDGE_GAIN_1

1 Gain. This is used with getGain and setGain

See Also:

Constant Field Values

PHIDGET_BRIDGE_GAIN_8

public static final int PHIDGET_BRIDGE_GAIN_8

8 Gain. This is used with getGain and setGain

See Also:

Constant Field Values

PHIDGET_BRIDGE_GAIN_16

public static final int PHIDGET_BRIDGE_GAIN_16

16 Gain. This is used with getGain and setGain

See Also:

Constant Field Values

PHIDGET_BRIDGE_GAIN_32

public static final int PHIDGET_BRIDGE_GAIN_32

32 Gain. This is used with getGain and setGain

See Also:

Constant Field Values

PHIDGET_BRIDGE_GAIN_64

public static final int PHIDGET_BRIDGE_GAIN_64

64 Gain. This is used with getGain and setGain

See Also:

Constant Field Values

PHIDGET_BRIDGE_GAIN_128

public static final int PHIDGET_BRIDGE_GAIN_128

128 Gain. This is used with getGain and setGain

See Also:

Constant Field Values

PHIDGET_BRIDGE_GAIN_UNKNOWN

public static final int PHIDGET_BRIDGE_GAIN_UNKNOWN

Unknown Gain. This is used with getGain and setGain

See Also:

Constant Field Values

Constructor Detail

BridgePhidget

public BridgePhidget()
              throws PhidgetException

Method Detail

getInputCount

public int getInputCount()
                  throws PhidgetException

Returns the number of bridges.

Returns:

Number of bridges

Throws:

PhidgetException

getBridgeValue

public double getBridgeValue(int index)
                      throws PhidgetException

Returns the value of the selected input, in mV/V. If the input is not enabled, an EPHIDGET_UNKNOWNVAL exception will be thrown. If the bridge is saturated , this will be equal to BridgeMax or BridgeMin and an error event will be fired - in this case, gain should be reduced if possible.

Parameters:

index - Index of the bridge

Returns:

bridge value

Throws:

PhidgetException - If this Phidget is not opened and attached, or if the index is out of range. See open for information on determining if a device is attached.

getBridgeMin

public double getBridgeMin(int index)
                    throws PhidgetException

Returns the minimum value that the selected bridge can measure, in mV/V. This value will depend on the selected gain. At a gain of 1, BridgeMin == -1000 mV/V.

Parameters:

index - Index of the bridge

Returns:

minimum value

Throws:

PhidgetException - If this Phidget is not opened and attached, or if the index is out of range. See open for information on determining if a device is attached.

getBridgeMax

public double getBridgeMax(int index)
                    throws PhidgetException

Returns the maximum value that the selected bridge can measure, in mV/V. This value will depend on the selected gain. At a gain of 1, BridgeMin == 1000 mV/V.

Parameters:

index - Index of the bridge

Returns:

maximum value

Throws:

PhidgetException - If this Phidget is not opened and attached, or if the index is out of range. See open for information on determining if a device is attached.

getEnabled

public boolean getEnabled(int index)
                   throws PhidgetException

Returns the enabled state of the specified bridge. This applies power between +5v and Ground, and starts measuring the differential on the +/- pins. By default, all bridges are disabled, and need to be explicitly enabled on startup.

Parameters:

index - Index of the bridge

Returns:

state of the specified bridge

Throws:

PhidgetException - If this Phidget is not opened and attached, or if the index is invalid. See open for information on determining if a device is attached.

setEnabled

public void setEnabled(int index,
                       boolean state)
                throws PhidgetException

Sets the enabled state of the specified bridge. This applies power between +5v and Ground, and starts measuring the differential on the +/- pins. By default, all bridges are disabled, and need to be explicitly enabled on startup.

Parameters:

index - Index of the bridge

state - new state of the specified bridge

Throws:

PhidgetException - If this Phidget is not opened and attached, or if the index is invalid. See open for information on determining if a device is attached.

getGain

public int getGain(int index)
            throws PhidgetException

Returns the gain for the selected bridge. Note that increasing the gains will reduce the measurable voltage difference by the gain factor, with +-1000 mV/V being the maximum, with no gain. The possible values for gain are PHIDGET_BRIDGE_GAIN_1, PHIDGET_BRIDGE_GAIN_8, PHIDGET_BRIDGE_GAIN_16, PHIDGET_BRIDGE_GAIN_32, PHIDGET_BRIDGE_GAIN_64, PHIDGET_BRIDGE_GAIN_128, PHIDGET_BRIDGE_GAIN_UNKNOWN

Parameters:

index - Index of the bridge

Returns:

gain

Throws:

PhidgetException - If this Phidget is not opened and attached, or if the index is invalid. See open for information on determining if a device is attached.

setGain

public void setGain(int index,
                    int gain)
             throws PhidgetException

Sets the gain for the selected bridge. Note that increasing the gains will reduce the measurable voltage difference by the gain factor, with +-1000 mV/V being the maximum, with no gain.

The possible values for gain are PHIDGET_BRIDGE_GAIN_1, PHIDGET_BRIDGE_GAIN_8, PHIDGET_BRIDGE_GAIN_16, PHIDGET_BRIDGE_GAIN_32, PHIDGET_BRIDGE_GAIN_64, PHIDGET_BRIDGE_GAIN_128, PHIDGET_BRIDGE_GAIN_UNKNOWN

Parameters:

index - Index of the bridge

gain - new gain

Throws:

PhidgetException - If this Phidget is not opened and attached, or if the index is invalid. See open for information on determining if a device is attached.

getDataRate

public int getDataRate()
                throws PhidgetException

Returns the data rate, in ms. Data rate applies to all 4 bridges simultaneously. Setting a slower data rate will reduce noise at the cost of sample time. Also note that each bridge is being sampled only 1/4 of the time - this is okay for very stable signals, but for changing signals, it is best to set a higher sampling rate and do averaging in the software.

Data rate must be a multiple of 8ms. Trying to set something between multiplies of 8 will cause an EPHIDGET_INVALIDARG exception.

Returns:

Data Rate

Throws:

PhidgetException - If this Phidget is not opened and attached, or if the index is invalid. See open for information on determining if a device is attached.

setDataRate

public void setDataRate(int rate)
                 throws PhidgetException

Sets the data rate, in ms. Data rate applies to all 4 bridges simultaneously. Setting a slower data rate will reduce noise at the cost of sample time. Also note that each bridge is being sampled only 1/4 of the time - this is okay for very stable signals, but for changing signals, it is best to set a higher sampling rate and do averaging in the software.

Data rate must be a multiple of 8ms. Trying to set something between multiplies of 8 will cause an EPHIDGET_INVALIDARG exception.

Parameters:

rate - new data rate

Throws:

PhidgetException - If this Phidget is not opened and attached, or if the data rate is out of range See open for information on determining if a device is attached.

getDataRateMin

public int getDataRateMin()
                   throws PhidgetException

Gets the minimum supported data rate, in ms.

Returns:

minimum supported data rate

Throws:

PhidgetException - If this Phidget is not opened and attached. See open for information on determining if a device is attached.

getDataRateMax

public int getDataRateMax()
                   throws PhidgetException

Gets the maximum supported data rate, in ms.

Returns:

maximum supported data rate

Throws:

PhidgetException - If this Phidget is not opened and attached. See open for information on determining if a device is attached.

addBridgeDataListener

public final void addBridgeDataListener(BridgeDataListener l)

Adds a bridge data listener. The bridge data handler is a method that will be called at the specified data rate, for each enabled bridge. Value is the bridgeValue, in mV/V.

There is no limit on the number of bridge data handlers that can be registered for a particular Phidget.

Parameters:

l - An implemetation of the BridgeDataListener interface

removeBridgeDataListener

public final void removeBridgeDataListener(BridgeDataListener l)