Class PwmChannel

java.lang.Object

com.codename1.hardware.PwmChannel

public final class PwmChannel
extends Object

A hardware PWM channel, opened through Hardware.openPwm(int, int).

PwmChannel servo = Hardware.getInstance().openPwm(0, 0);
servo.configure(20000000L, 1500000L, true);  // 50 Hz, 1.5 ms pulse: centred

Method Summary

Modifier and Type	Method	Description
void	close()	Disables the output and releases the channel.
void	configure(long periodNanos, long dutyNanos, boolean enabled)	Sets the period, the high time and whether the output runs.
int	getChannel()	The channel within the controller.
int	getChip()	The PWM controller number.
long	getDutyNanos()	The configured high time in nanoseconds.
long	getPeriodNanos()	The configured period in nanoseconds, 0 before configure(long, long, boolean).
boolean	isEnabled()	true while the output runs.
void	setDutyCycle(double fraction)	Sets the duty cycle as a fraction of the current period, keeping the period and enabled state.

Methods inherited from class Object

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

Method Details

getChip

public int getChip()

The PWM controller number.

getChannel

public int getChannel()

The channel within the controller.

configure

public void configure(long periodNanos,
 long dutyNanos,
 boolean enabled)
               throws HardwareException

Sets the period, the high time and whether the output runs.

Throws

• HardwareException: when the duty exceeds the period, the controller rejects the values, or the channel is closed

Throws:

HardwareException

setDutyCycle

public void setDutyCycle(double fraction)
                  throws HardwareException

Sets the duty cycle as a fraction of the current period, keeping the period and enabled state.

Throws

• HardwareException: when no period was configured yet

Throws:

HardwareException

getPeriodNanos

public long getPeriodNanos()

The configured period in nanoseconds, 0 before configure(long, long, boolean).

getDutyNanos

public long getDutyNanos()

The configured high time in nanoseconds.

isEnabled

public boolean isEnabled()

true while the output runs.

close

public void close()

Disables the output and releases the channel. Closing twice is harmless.