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PwmDriver

public interface PwmDriver
implements Pwm

com.google.android.things.userdriver.pio.PwmDriver


PWM user driver. A PwmDriver must implement all Pwm functions, but additionally this class provides an open() function that will be called whenever a process obtains ownership of the PWM, to match the existing close() function.

Summary

Public methods

abstract void close()

Closes the PWM.

default String getName()

Returns null.

abstract void open()

Opens the PWM.

Inherited methods

From interface com.google.android.things.pio.Pwm
From interface java.io.Closeable
From interface java.lang.AutoCloseable

Public methods

close

void close ()

Closes the PWM. This will be called when the PWM is closed by its owner. Any resources that need to be cleaned up should be done so here. This method may throw IOException to indicate I/O failure, but will still be considered closed and may attempt to be re-opened in the future.

Throws
IOException on I/O failure; the driver will still be considered closed.

getName

String getName ()

Returns null. I/O user drivers can be registered under any name so this returns null by default. Child classes may override this if other behavior is desired.

Returns
String

open

void open ()

Opens the PWM. This will be called when ownership of a PWM is obtained. The driver should do any initialization needed to configure the PWM for use here.

Throws
IOException on I/O failure; the driver will remain closed.