@Override
public GpioPin provisionPin(GpioProvider provider, Pin pin, String name, PinMode mode) {
// if an existing pin has been previously created, then throw an error
for (GpioPin p : pins) {
if (p.getProvider().equals(provider) && p.getPin().equals(pin)) {
throw new GpioPinExistsException(pin);
}
}
// create new GPIO pin instance
GpioPin gpioPin = new GpioPinImpl(this, provider, pin);
// set the gpio pin name
if (name != null) {
gpioPin.setName(name);
}
// export this pin
gpioPin.export(mode);
// add this new pin instance to the managed collection
pins.add(gpioPin);
// return new new pin instance
return gpioPin;
}
public void setShutdownOptions(Boolean unexport, PinState state, GpioPin... pin) {
for (GpioPin p : pin) {
if (!pins.contains(p)) {
throw new GpioPinNotProvisionedException(p.getPin());
}
p.setShutdownOptions(unexport, state);
}
}
public void setShutdownOptions(GpioPinShutdown options, GpioPin... pin) {
for (GpioPin p : pin) {
if (!pins.contains(p)) {
throw new GpioPinNotProvisionedException(p.getPin());
}
p.setShutdownOptions(options);
}
}
private void unprovision(Pin pin) {
for (GpioPin e : gpioContoller.getProvisionedPins()) {
if (e.getPin().equals(pin)) {
gpioContoller.unprovisionPin(e);
break;
}
}
}
@Override
public PinPullResistance getPullResistance(GpioPin pin) {
// ensure the requested pin has been provisioned
if (!pins.contains(pin)) {
throw new GpioPinNotProvisionedException(pin.getPin());
}
// get pin pull resistance
return pin.getPullResistance();
}
@Override
public PinMode getMode(GpioPin pin) {
// ensure the requested pin has been provisioned
if (!pins.contains(pin)) {
throw new GpioPinNotProvisionedException(pin.getPin());
}
// return pin edge setting
return pin.getMode();
}
@Override
public void export(PinMode mode, GpioPin... pin) {
if (pin == null || pin.length == 0) {
throw new IllegalArgumentException("Missing pin argument.");
}
for (GpioPin p : pin) {
// ensure the requested pin has been provisioned
if (!pins.contains(p)) {
throw new GpioPinNotProvisionedException(p.getPin());
}
// export the pin
p.export(mode);
}
}
@Override
public void setPullResistance(PinPullResistance resistance, GpioPin... pin) {
if (pin == null || pin.length == 0) {
throw new IllegalArgumentException("Missing pin argument.");
}
for (GpioPin p : pin) {
// ensure the requested pin has been provisioned
if (!pins.contains(p)) {
throw new GpioPinNotProvisionedException(p.getPin());
}
// set pin pull resistance
p.setPullResistance(resistance);
}
}
/**
* @param pin
* @return
* <p>A value of 'true' is returned if the requested pin is exported.
*/
@Override
public boolean isExported(GpioPin... pin) {
if (pin == null || pin.length == 0) {
throw new IllegalArgumentException("Missing pin argument.");
}
for (GpioPin p : pin) {
// ensure the requested pin has been provisioned
if (!pins.contains(pin)) {
throw new GpioPinNotProvisionedException(p.getPin());
}
if (!p.isExported()) {
return false;
}
}
// return the pin exported state
return true;
}
@Override
public void unprovisionPin(GpioPin... pin) {
if (pin == null || pin.length == 0) {
throw new IllegalArgumentException("Missing pin argument.");
}
for (int index = (pin.length - 1); index >= 0; index--) {
GpioPin p = pin[index];
// ensure the requested pin has been provisioned
if (!pins.contains(p)) {
throw new GpioPinNotProvisionedException(p.getPin());
}
// remove all listeners and triggers
if (p instanceof GpioPinInput) {
((GpioPinInput) p).removeAllListeners();
((GpioPinInput) p).removeAllTriggers();
}
// remove this pin instance from the managed collection
pins.remove(p);
}
}