// default constructor
public PiFaceBase(byte spiAddress, SpiChannel spiChannel) throws IOException {
// create Pi-Face GPIO provider
gpioProvider = new PiFaceGpioProvider(spiAddress, spiChannel);
// provision gpio input pins for the Pi-Face board
inputPins =
new GpioPinDigitalInput[] {
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_00),
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_01),
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_02),
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_03),
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_04),
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_05),
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_06),
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_07)
};
// provision gpio output pins for the Pi-Face board
outputPins =
new GpioPinDigitalOutput[] {
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_00),
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_01),
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_02),
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_03),
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_04),
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_05),
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_06),
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_07)
};
// create relay components for the first two output pins on the Pi-Face board
relays =
new Relay[] {new GpioRelayComponent(outputPins[0]), new GpioRelayComponent(outputPins[1])};
// create switch components for the first four input pins on the Pi-Face board
switches =
new Switch[] {
new GpioSwitchComponent(inputPins[0], PinState.HIGH, PinState.LOW),
new GpioSwitchComponent(inputPins[1], PinState.HIGH, PinState.LOW),
new GpioSwitchComponent(inputPins[2], PinState.HIGH, PinState.LOW),
new GpioSwitchComponent(inputPins[3], PinState.HIGH, PinState.LOW)
};
// create LED components for the eight output pins on the Pi-Face board
leds =
new LED[] {
new GpioLEDComponent(outputPins[0]),
new GpioLEDComponent(outputPins[1]),
new GpioLEDComponent(outputPins[2]),
new GpioLEDComponent(outputPins[3]),
new GpioLEDComponent(outputPins[4]),
new GpioLEDComponent(outputPins[5]),
new GpioLEDComponent(outputPins[6]),
new GpioLEDComponent(outputPins[7])
};
}
public static void main(String[] args) throws InterruptedException {
System.out.println("<--Pi4J--> GPIO Trigger Example ... started.");
// create gpio controller
final GpioController gpio = GpioFactory.getInstance();
// provision gpio pin #02 as an input pin with its internal pull down resistor enabled
final GpioPinDigitalInput myButton =
gpio.provisionDigitalInputPin(RaspiPin.GPIO_02, PinPullResistance.PULL_DOWN);
System.out.println(" ... complete the GPIO #02 circuit and see the triggers take effect.");
// setup gpio pins #04, #05, #06 as an output pins and make sure they are all LOW at startup
GpioPinDigitalOutput myLed[] = {
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_04, "LED #1", PinState.LOW),
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_05, "LED #2", PinState.LOW),
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_06, "LED #3", PinState.LOW)
};
// create a gpio control trigger on the input pin ; when the input goes HIGH, also set gpio pin
// #04 to HIGH
myButton.addTrigger(new GpioSetStateTrigger(PinState.HIGH, myLed[0], PinState.HIGH));
// create a gpio control trigger on the input pin ; when the input goes LOW, also set gpio pin
// #04 to LOW
myButton.addTrigger(new GpioSetStateTrigger(PinState.LOW, myLed[0], PinState.LOW));
// create a gpio synchronization trigger on the input pin; when the input changes, also set gpio
// pin #05 to same state
myButton.addTrigger(new GpioSyncStateTrigger(myLed[1]));
// create a gpio pulse trigger on the input pin; when the input goes HIGH, also pulse gpio pin
// #06 to the HIGH state for 1 second
myButton.addTrigger(new GpioPulseStateTrigger(PinState.HIGH, myLed[2], 1000));
// create a gpio callback trigger on gpio pin#4; when #4 changes state, perform a callback
// invocation on the user defined 'Callable' class instance
myButton.addTrigger(
new GpioCallbackTrigger(
new Callable<Void>() {
public Void call() throws Exception {
System.out.println(" --> GPIO TRIGGER CALLBACK RECEIVED ");
return null;
}
}));
// keep program running until user aborts (CTRL-C)
for (; ; ) {
Thread.sleep(500);
}
// stop all GPIO activity/threads by shutting down the GPIO controller
// (this method will forcefully shutdown all GPIO monitoring threads and scheduled tasks)
// gpio.shutdown(); <--- implement this method call if you wish to terminate the Pi4J GPIO
// controller
}
private void provisionPins() {
System.out.println(gpio.toString());
dataIn =
gpio.provisionDigitalOutputPin(
new PinImpl(
"RaspberryPi GPIO Provider",
pins[0],
"Pin1",
EnumSet.of(PinMode.DIGITAL_INPUT, PinMode.DIGITAL_OUTPUT),
PinPullResistance.all()),
"MyLED",
PinState.LOW);
outputEnable =
gpio.provisionDigitalOutputPin(
new PinImpl(
"RaspberryPi GPIO Provider",
pins[1],
"Pin4",
EnumSet.of(PinMode.DIGITAL_INPUT, PinMode.DIGITAL_OUTPUT),
PinPullResistance.all()),
"MyLED",
PinState.LOW);
latch =
gpio.provisionDigitalOutputPin(
new PinImpl(
"RaspberryPi GPIO Provider",
pins[2],
"Pin5",
EnumSet.of(PinMode.DIGITAL_INPUT, PinMode.DIGITAL_OUTPUT),
PinPullResistance.all()),
"MyLED",
PinState.LOW);
clear =
gpio.provisionDigitalOutputPin(
new PinImpl(
"RaspberryPi GPIO Provider",
pins[3],
"Pin3",
EnumSet.of(PinMode.DIGITAL_INPUT, PinMode.DIGITAL_OUTPUT),
PinPullResistance.all()),
"MyLED",
PinState.HIGH);
clock =
gpio.provisionDigitalOutputPin(
new PinImpl(
"RaspberryPi GPIO Provider",
pins[4],
"Pin2",
EnumSet.of(PinMode.DIGITAL_INPUT, PinMode.DIGITAL_OUTPUT),
PinPullResistance.all()),
"MyLED",
PinState.LOW);
}
public static void main(String[] args) throws InterruptedException {
System.out.println("works");
GpioController gpio = GpioFactory.getInstance();
GpioPinDigitalOutput pin1 =
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_01, "MyLed", PinState.HIGH);
pin1.setShutdownOptions(true, PinState.LOW);
Thread.sleep(5000);
System.out.println("pin low");
pin1.low();
Thread.sleep(5000);
System.out.println("pin toggle");
pin1.toggle();
Thread.sleep(5000);
System.out.println("pin pulse");
pin1.pulse(1000, true);
Thread.sleep(2000);
System.out.println("pin blink");
pin1.blink(500, 5000);
Thread.sleep(2000);
System.out.println("koniec");
gpio.shutdown();
}
public static void main(String[] args) throws InterruptedException {
System.out.println("<--Pi4J--> GPIO Cylon Example ... started.");
// create gpio controller
final GpioController gpio = GpioFactory.getInstance();
// provision gpio pin #01 as an output pin and turn on
final GpioPinDigitalOutput[] pins = {
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_00, PinState.LOW),
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_01, PinState.LOW),
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_02, PinState.LOW),
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_03, PinState.LOW),
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_04, PinState.LOW),
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_05, PinState.LOW),
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_06, PinState.LOW),
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_07, PinState.LOW)
};
System.out.println("--> GPIO state should be: ON");
// set shutdown options on all pins
gpio.setShutdownOptions(true, PinState.LOW, pins);
// infinite loop
while (true) {
for (int index = 0; index <= 6; index++) {
pins[index].pulse(50);
Thread.sleep(50);
}
for (int index = 6; index >= 0; index--) {
pins[index].pulse(50);
Thread.sleep(50);
}
}
// stop all GPIO activity/threads by shutting down the GPIO controller
// (this method will forcefully shutdown all GPIO monitoring threads and scheduled tasks)
// gpio.shutdown(); <--- implement this method call if you wish to terminate the Pi4J GPIO
// controller
}
@Before
public void setup() {
// create a mock gpio provider and controller
provider = MockGpioFactory.getMockProvider();
gpio = MockGpioFactory.getInstance();
// provision pins for testing
inputPin = gpio.provisionDigitalInputPin(MockPin.DIGITAL_INPUT_PIN, "digitalInputPin");
outputPin = gpio.provisionDigitalOutputPin(MockPin.DIGITAL_OUTPUT_PIN, "digitalOutputPin");
// create triggers
triggerHigh = new GpioSetStateTrigger(PinState.HIGH, outputPin, PinState.HIGH);
triggerLow = new GpioSetStateTrigger(PinState.LOW, outputPin, PinState.LOW);
// add triggers to input pin
inputPin.addTrigger(triggerHigh);
inputPin.addTrigger(triggerLow);
}
public static void main(String[] args) {
System.out.println("<--Pi4J--> GPIO Frequency Example ... started.");
// create gpio controller
final GpioController gpio = GpioFactory.getInstance();
// provision gpio pin #01 as an output pin and turn on
final GpioPinDigitalOutput pin = gpio.provisionDigitalOutputPin(RaspiPin.GPIO_01, PinState.LOW);
// continuous loop
while (true) {
pin.setState(true);
pin.setState(false);
}
// stop all GPIO activity/threads by shutting down the GPIO controller
// (this method will forcefully shutdown all GPIO monitoring threads and scheduled tasks)
// gpio.shutdown(); <--- implement this method call if you wish to terminate the Pi4J GPIO
// controller
}
public GpioPinDigitalOutput getOutputPin(Integer pinNumber) {
switch (pinNumber) {
case 0:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_00);
case 1:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_01);
case 2:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_02);
case 3:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_03);
case 4:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_04);
case 5:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_05);
case 6:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_06);
case 7:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_07);
case 8:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_08);
case 9:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_09);
case 10:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_10);
case 11:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_11);
case 12:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_12);
case 13:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_13);
case 14:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_14);
case 15:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_15);
case 16:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_16);
case 17:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_17);
case 18:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_18);
case 19:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_19);
case 20:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_20);
case 21:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_21);
case 22:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_22);
case 23:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_23);
case 24:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_24);
case 25:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_25);
case 26:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_26);
case 27:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_27);
case 28:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_28);
case 29:
return gpio.provisionDigitalOutputPin(RaspiPin.GPIO_29);
default:
return null;
}
}
public static void main(String[] args) throws InterruptedException {
// START SNIPPET: usage-create-controller-snippet
// create gpio controller instance
final GpioController gpio = GpioFactory.getInstance();
// END SNIPPET: usage-create-controller-snippet
// START SNIPPET: usage-provision-input-pin-snippet
// provision gpio pin #02 as an input pin with its internal pull down resistor enabled
// (configure pin edge to both rising and falling to get notified for HIGH and LOW state
// changes)
GpioPinDigitalInput myButton =
gpio.provisionDigitalInputPin(
RaspiPin.GPIO_02, // PIN NUMBER
"MyButton", // PIN FRIENDLY NAME (optional)
PinPullResistance.PULL_DOWN); // PIN RESISTANCE (optional)
// END SNIPPET: usage-provision-input-pin-snippet
// START SNIPPET: usage-provision-output-pin-snippet
// provision gpio pins #04 as an output pin and make sure is is set to LOW at startup
GpioPinDigitalOutput myLed =
gpio.provisionDigitalOutputPin(
RaspiPin.GPIO_04, // PIN NUMBER
"My LED", // PIN FRIENDLY NAME (optional)
PinState.LOW); // PIN STARTUP STATE (optional)
// END SNIPPET: usage-provision-output-pin-snippet
// START SNIPPET: usage-shutdown-pin-snippet
// configure the pin shutdown behavior; these settings will be
// automatically applied to the pin when the application is terminated
// ensure that the LED is turned OFF when the application is shutdown
myLed.setShutdownOptions(true, PinState.LOW, PinPullResistance.OFF);
// END SNIPPET: usage-shutdown-pin-snippet
// START SNIPPET: usage-control-pin-snippet
// explicitly set a state on the pin object
myLed.setState(PinState.HIGH);
// use convenience wrapper method to set state on the pin object
myLed.low();
myLed.high();
// use toggle method to apply inverse state on the pin object
myLed.toggle();
// use pulse method to set the pin to the HIGH state for
// an explicit length of time in milliseconds
myLed.pulse(1000);
// END SNIPPET: usage-control-pin-snippet
// START SNIPPET: usage-read-pin-snippet
// get explicit state enumeration for the GPIO pin associated with the button
PinState myButtonState = myButton.getState();
// use convenience wrapper method to interrogate the button state
boolean buttonPressed = myButton.isHigh();
// END SNIPPET: usage-read-pin-snippet
// START SNIPPET: usage-register-listener-snippet
// create and register gpio pin listener
myButton.addListener(new GpioUsageExampleListener());
// END SNIPPET: usage-register-listener-snippet
// START SNIPPET: usage-trigger-snippet
// create a gpio synchronization trigger on the input pin
// when the input state changes, also set LED controlling gpio pin to same state
myButton.addTrigger(new GpioSyncStateTrigger(myLed));
// END SNIPPET: usage-trigger-snippet
// keep program running until user aborts (CTRL-C)
while (true) {
Thread.sleep(500);
}
// stop all GPIO activity/threads by shutting down the GPIO controller
// (this method will forcefully shutdown all GPIO monitoring threads and scheduled tasks)
// gpio.shutdown(); <--- implement this method call if you wish to terminate the Pi4J GPIO
// controller
}
@Override
public GpioPinDigitalOutput provisionDigitalOutputPin(Pin pin, PinState defaultState) {
return delegate.provisionDigitalOutputPin(pin, defaultState);
}
@Override
public GpioPinDigitalOutput provisionDigitalOutputPin(
GpioProvider provider, Pin pin, String name, PinState defaultState) {
return delegate.provisionDigitalOutputPin(provider, pin, name, defaultState);
}
@Override
public GpioPinDigitalOutput provisionDigitalOutputPin(Pin pin) {
return delegate.provisionDigitalOutputPin(pin);
}
public static void main(String args[]) throws InterruptedException {
System.out.println("<--Pi4J--> GPIO Listen Example ... started.");
// create gpio controller
final GpioController gpio = GpioFactory.getInstance();
// provision gpio pin #02 as an input pin with its internal pull down resistor enabled
final GpioPinDigitalInput myButton =
gpio.provisionDigitalInputPin(RaspiPin.GPIO_02, PinPullResistance.PULL_DOWN);
// create custom Olimex GPIO provider
final OlimexAVRIOGpioProvider olimexProvider =
new OlimexAVRIOGpioProvider(Serial.DEFAULT_COM_PORT);
// provision gpio input pin #01 from Olimex
final GpioPinDigitalInput myInput =
gpio.provisionDigitalInputPin(olimexProvider, OlimexAVRIOPin.IN_01);
// create gpio pin listener
GpioPinListenerDigital listener =
new GpioPinListenerDigital() {
@Override
public void handleGpioPinDigitalStateChangeEvent(GpioPinDigitalStateChangeEvent event) {
// display pin state on console
System.out.println(
" --> GPIO PIN STATE CHANGE: " + event.getPin() + " = " + event.getState());
}
};
// register gpio pin listener for each input pin
myButton.addListener(listener);
myInput.addListener(listener);
// setup gpio pins #04, #05, #06 as an output pins and make sure they are all LOW at startup
GpioPinDigitalOutput myRelays[] = {
gpio.provisionDigitalOutputPin(
olimexProvider, OlimexAVRIOPin.RELAY_01, "RELAY #1", PinState.LOW),
gpio.provisionDigitalOutputPin(
olimexProvider, OlimexAVRIOPin.RELAY_02, "RELAY #2", PinState.LOW),
gpio.provisionDigitalOutputPin(
olimexProvider, OlimexAVRIOPin.RELAY_03, "RELAY #3", PinState.LOW),
gpio.provisionDigitalOutputPin(
olimexProvider, OlimexAVRIOPin.RELAY_04, "RELAY #4", PinState.LOW)
};
// create a gpio control trigger on the input pin ; when the input goes HIGH, also set gpio pin
// #04 to HIGH
myButton.addTrigger(new GpioSetStateTrigger(PinState.HIGH, myRelays[0], PinState.HIGH));
// create a gpio control trigger on the input pin ; when the input goes LOW, also set gpio pin
// #04 to LOW
myButton.addTrigger(new GpioSetStateTrigger(PinState.LOW, myRelays[0], PinState.LOW));
// create a gpio synchronization trigger on the input pin; when the input changes, also set gpio
// pin #05 to same state
myButton.addTrigger(new GpioSyncStateTrigger(myRelays[1]));
// create a gpio synchronization trigger on the input pin; when the input changes, also set gpio
// pin #05 to same state
myButton.addTrigger(new GpioSyncStateTrigger(myRelays[2]));
// create a gpio pulse trigger on the input pin; when the input goes HIGH, also pulse gpio pin
// #06 to the HIGH state for 1 second
myButton.addTrigger(new GpioPulseStateTrigger(PinState.HIGH, myRelays[3], 1000));
System.out.println(
" ... complete the GPIO #02 circuit and see the listener feedback here in the console.");
// keep program running until user aborts (CTRL-C)
// or we reach 60 seconds
for (int seconds = 0; seconds < 60; seconds++) {
Thread.sleep(1000);
}
System.out.println(" ... exiting program.");
// stop all GPIO activity/threads by shutting down the GPIO controller
// (this method will forcefully shutdown all GPIO monitoring threads and scheduled tasks)
gpio.shutdown();
}
/*
*
* Essa classe foi criada a partir do exemplo em python do endereço abaixo
* https://www.modmypi.com/blog/hc-sr04-ultrasonic-range-sensor-on-the-raspberry-pi
*
*
*/
public class HCSR04 {
GpioController gpio = GpioFactory.getInstance();
// Configura os pinos
GpioPinDigitalOutput trigger =
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_04, "trigger", PinState.LOW);
GpioPinDigitalInput echo =
gpio.provisionDigitalInputPin(RaspiPin.GPIO_05, "echo", PinPullResistance.PULL_DOWN);
public long getDistancia() {
System.out.println("Medição de distância em progresso...");
this.trigger.low();
System.out.println("Aguardando tempo do pino...");
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Iniciando a leitura
System.out.println("Iniciando a leitura");
try {
// Envia o sinal no pino Trigger
// Coloca o trigger em HIGH por 10uS (8 ultrasound bursts at 40 kHz)
this.trigger.high();
TimeUnit.MICROSECONDS.sleep(10);
this.trigger.low();
// Escuta o pino de ECHO
// O sensor emitirá uma onda sonora que ao encontrar um obstáculo
// rebaterá de volta em direção ao módulo, sendo que o neste tempo
// de emissão e recebimento do sinal o pino ECHO ficará em nivel alto.
// Logo o calcula da distância pode ser feito de acordo com o tempo em
// que o pino ECHO permaneceu em nível alto após o pino Trigger ter
// sido colocado em nível alto.
long inicio = 0;
long fim = 0;
while (this.echo.isLow()) {
inicio = System.nanoTime();
}
while (this.echo.isHigh()) {
fim = System.nanoTime();
}
// Calcula a diferença entre "fim" e "inicio"
long duracao_pulso = fim - inicio;
// Calcula distância
long distancia = 17150 * duracao_pulso;
// Round
distancia = Math.round(distancia);
System.out.println("Distancia: " + distancia);
return distancia;
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return 0;
}
}
public static void main(String args[]) throws InterruptedException, IOException {
System.out.println("<--Pi4J--> PiFace (MCP23017) GPIO Example ... started.");
// create gpio controller
final GpioController gpio = GpioFactory.getInstance();
// create custom PiFace GPIO provider
final PiFaceGpioProvider gpioProvider =
new PiFaceGpioProvider(PiFaceGpioProvider.DEFAULT_ADDRESS, SpiChannel.CS0);
// provision gpio input pins from PiFaceGpioProvider
GpioPinDigitalInput myInputs[] = {
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_00),
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_01),
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_02),
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_03),
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_04),
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_05),
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_06),
gpio.provisionDigitalInputPin(gpioProvider, PiFacePin.INPUT_07)
};
// create and register gpio pin listener
gpio.addListener(
new GpioPinListenerDigital() {
@Override
public void handleGpioPinDigitalStateChangeEvent(GpioPinDigitalStateChangeEvent event) {
// display pin state on console
System.out.println(
" --> GPIO PIN STATE CHANGE: " + event.getPin() + " = " + event.getState());
}
},
myInputs);
// provision gpio output pins and make sure they are all LOW at startup
GpioPinDigitalOutput myOutputs[] = {
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_00),
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_01),
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_02),
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_03),
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_04),
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_05),
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_06),
gpio.provisionDigitalOutputPin(gpioProvider, PiFacePin.OUTPUT_07),
};
// keep program running for 20 seconds
for (int count = 0; count < 10; count++) {
gpio.setState(true, myOutputs);
Thread.sleep(1000);
gpio.setState(false, myOutputs);
Thread.sleep(1000);
}
// stop all GPIO activity/threads by shutting down the GPIO controller
// (this method will forcefully shutdown all GPIO monitoring threads and scheduled tasks)
gpio.shutdown();
System.out.println("Exiting PiFaceGpioExample");
}
/**
* [ARGUMENT/OPTION "--pin (#)" | "-p (#)" ] This example program accepts an optional argument for
* specifying the GPIO pin (by number) to use with this GPIO listener example. If no argument is
* provided, then GPIO #1 will be used. -- EXAMPLE: "--pin 4" or "-p 0".
*
* @param args
* @throws InterruptedException
* @throws PlatformAlreadyAssignedException
*/
public static void main(String[] args)
throws InterruptedException, PlatformAlreadyAssignedException {
// ####################################################################
//
// since we are not using the default Raspberry Pi platform, we should
// explicitly assign the platform as the BananaPi platform.
//
// ####################################################################
PlatformManager.setPlatform(Platform.BANANAPI);
// create Pi4J console wrapper/helper
// (This is a utility class to abstract some of the boilerplate code)
final Console console = new Console();
// print program title/header
console.title("<-- The Pi4J Project -->", "GPIO Output Example");
// allow for user to exit program using CTRL-C
console.promptForExit();
// create gpio controller
final GpioController gpio = GpioFactory.getInstance();
// ####################################################################
//
// When provisioning a pin, use the BananaPiPin class.
//
// ####################################################################
// by default we will use gpio pin #01; however, if an argument
// has been provided, then lookup the pin by address
Pin pin =
CommandArgumentParser.getPin(
BananaPiPin.class, // pin provider class to obtain pin instance from
BananaPiPin.GPIO_01, // default pin if no pin argument found
args); // argument array to search in
// provision gpio pin as an output pin and turn on
final GpioPinDigitalOutput output =
gpio.provisionDigitalOutputPin(pin, "My Output", PinState.HIGH);
// set shutdown state for this pin: keep as output pin, set to low state
output.setShutdownOptions(false, PinState.LOW);
// create a pin listener to print out changes to the output gpio pin state
output.addListener(
new GpioPinListenerDigital() {
@Override
public void handleGpioPinDigitalStateChangeEvent(GpioPinDigitalStateChangeEvent event) {
// display pin state on console
console.println(
" --> GPIO PIN STATE CHANGE: "
+ event.getPin()
+ " = "
+ ConsoleColor.conditional(
event.getState().isHigh(), // conditional expression
ConsoleColor.GREEN, // positive conditional color
ConsoleColor.RED, // negative conditional color
event.getState())); // text to display
}
});
// prompt user that we are ready
console.println(" ... Successfully provisioned output pin: " + output.toString());
console.emptyLine();
console.box("The GPIO output pin states will cycle HIGH and LOW states now.");
console.emptyLine();
// notify user of current pin state
console.println(
"--> ["
+ output.toString()
+ "] state was provisioned with state = "
+ ConsoleColor.conditional(
output.getState().isHigh(), // conditional expression
ConsoleColor.GREEN, // positive conditional color
ConsoleColor.RED, // negative conditional color
output.getState())); // text to display
// wait
Thread.sleep(500);
// --------------------------------------------------------------------------
// tset gpio pin state to LOW
console.emptyLine();
console.println("Setting output pin state is set to LOW.");
output.low(); // or ... output.setState(PinState.LOW);
// wait
Thread.sleep(500);
// --------------------------------------------------------------------------
// tset gpio pin state to HIGH
console.emptyLine();
console.println("Setting output pin state from LOW to HIGH.");
output.setState(PinState.HIGH); // or ... output.high();
// wait
Thread.sleep(500);
// --------------------------------------------------------------------------
// toggle the current state of gpio pin (from HIGH to LOW)
console.emptyLine();
console.println("Toggling output pin state from HIGH to LOW.");
output.toggle();
// wait
Thread.sleep(500);
// --------------------------------------------------------------------------
// pulse gpio pin state for 1 second HIGH and then return to LOW
console.emptyLine();
console.println("Pulsing output pin state HIGH for 1 second.");
output.pulse(1000, true); // set second argument to 'true' use a blocking call
Thread.sleep(50);
// --------------------------------------------------------------------------
// blink gpio pin state for 1 second between HIGH and LOW states
console.emptyLine();
console.println(
"Blinking output pin state between HIGH and LOW for 3 seconds with a blink rate of 250ms.");
Future future = output.blink(250, 3000);
// --------------------------------------------------------------------------
// wait for blinking to finish; we are notified in a future object
while (!future.isDone()) {
Thread.sleep(50);
}
// stop all GPIO activity/threads by shutting down the GPIO controller
// (this method will forcefully shutdown all GPIO monitoring threads and scheduled tasks)
gpio.shutdown();
}
@Override
public GpioPinDigitalOutput provisionDigitalOutputPin(Pin pin, String name) {
return delegate.provisionDigitalOutputPin(pin, name);
}
@RestController
public class motorController {
GpioController gpio = GpioFactory.getInstance();
GpioPinDigitalOutput leftBackMotor =
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_04, "Motor Izquierda", PinState.LOW);
GpioPinDigitalOutput rightBackMotor =
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_05, "Motor Derecha", PinState.LOW);
GpioPinDigitalOutput rightFrontMotor =
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_02, "Motor Derecha", PinState.LOW);
GpioPinDigitalOutput leftFrontMotor =
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_03, "Motor Derecha", PinState.LOW);
@RequestMapping("/index")
public String start() {
return "app is running ok.";
}
@RequestMapping("/forward.htmlc")
public String forward() throws InterruptedException {
leftFrontMotor.high();
rightFrontMotor.high();
return "Moving forward...";
}
@RequestMapping("/back.html")
public String back() throws InterruptedException {
leftBackMotor.high();
rightBackMotor.high();
return "Moving backwards...";
}
@RequestMapping("/right.html")
public String right() throws InterruptedException {
leftFrontMotor.toggle();
rightFrontMotor.toggle();
return "Moving right...";
}
@RequestMapping("/left.html")
public String left() throws InterruptedException {
leftFrontMotor.toggle();
rightFrontMotor.toggle();
return "Moving left...";
}
@RequestMapping("/shutdown.html")
public String shutdown() {
gpio.shutdown();
leftBackMotor.low();
leftFrontMotor.low();
rightBackMotor.low();
rightFrontMotor.low();
gpio.unprovisionPin(leftBackMotor);
gpio.unprovisionPin(rightBackMotor);
gpio.unprovisionPin(rightFrontMotor);
gpio.unprovisionPin(leftFrontMotor);
return "Program was shutdown correctly";
}
}
public class SocketServer {
private ServerSocket serverSocket;
public static final int SERVERPORT = 6000;
// ================
// Commands
// ================
private static String LIGHT_ON = "light_on";
private static String LIGHT_OFF = "light_off";
private static String DOOR_OPEN = "door_open";
private static String DOOR_CLOSE = "door_close";
// ================
// GPIO block
// ================
final GpioController gpio = GpioFactory.getInstance();
final GpioPinDigitalOutput lightPin =
gpio.provisionDigitalOutputPin(RaspiPin.GPIO_01, "MyLED", PinState.LOW);
final GpioPinDigitalInput myButton =
gpio.provisionDigitalInputPin(RaspiPin.GPIO_02, PinPullResistance.PULL_DOWN);
Socket socket = null;
GpioCallbackTrigger doorRingTrigger;
public SocketServer() {
try {
initializeSoftPWM();
System.out.println("Waiting for connect ...");
createSocket();
System.out.println("Device is connected");
createDoorBell();
createCommandReader();
// Wait until user stops the application
Scanner scanIn = new Scanner(System.in);
String nextLine = "";
while (true) {
nextLine = scanIn.nextLine();
if (nextLine.equals("!exit")) {
System.exit(0);
}
;
}
} catch (SocketException e) {
System.out.println(String.format("Socket connect is broken: \n %s", e.getMessage()));
System.exit(0);
} catch (IOException e) {
System.out.println(String.format("Something wrong: \n %s", e.getMessage()));
System.exit(0);
}
}
private void createSocket() throws IOException, SocketException {
serverSocket = new ServerSocket(SERVERPORT);
socket = serverSocket.accept();
socket.setKeepAlive(true);
}
private void initializeSoftPWM() {
Gpio.wiringPiSetup();
SoftPwm.softPwmCreate(26, 0, 100);
}
private void createCommandReader() {
new Thread(new CommandReader()).start();
}
private class CommandReader implements Runnable {
public void run() {
try {
BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
while (true) {
String read = input.readLine();
if (read != null && !read.isEmpty()) {
System.out.println(String.format("Message: '%s' was received", read));
reactToCommand(read);
}
}
} catch (IOException e) {
System.out.println(String.format("Cannot create input stream: \n %s", e.getMessage()));
}
}
}
private void createDoorBell() {
new Thread(new DoorRingListener()).start();
}
private class DoorRingListener implements Runnable {
public void run() {
try {
PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
doorRingTrigger = creareDoorRingTrigger(out);
myButton.addTrigger(doorRingTrigger);
} catch (IOException e) {
System.out.println(String.format("Cannot create output stream: \n %s", e.getMessage()));
}
}
}
private GpioCallbackTrigger creareDoorRingTrigger(final PrintWriter out) {
return new GpioCallbackTrigger(
new Callable<Void>() {
public Void call() throws Exception {
myButton.removeAllTriggers();
System.out.println("Someone comes to home");
sendNotificationToClient(out);
try {
Thread.sleep(500);
} catch (InterruptedException e) {
}
myButton.addTrigger(doorRingTrigger);
return null;
}
});
}
private void sendNotificationToClient(PrintWriter out) {
out.println("Someone comes to home");
out.flush();
}
private void reactToCommand(String read) {
if (read.equalsIgnoreCase(LIGHT_ON)) {
turnLightOn();
} else if (read.equalsIgnoreCase(LIGHT_OFF)) {
turnLightOff();
} else if (read.equalsIgnoreCase(DOOR_OPEN)) {
openDoor();
} else if (read.equalsIgnoreCase(DOOR_CLOSE)) {
closeDoor();
}
}
private void closeDoor() {
SoftPwm.softPwmWrite(26, 5);
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
SoftPwm.softPwmWrite(26, 00);
}
private void openDoor() {
SoftPwm.softPwmWrite(26, 45);
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
SoftPwm.softPwmWrite(26, 00);
}
private void turnLightOff() {
lightPin.low();
System.out.println(String.format("Light was turned off"));
}
private void turnLightOn() {
lightPin.high();
System.out.println(String.format("Light was turned on"));
}
public static void main(String[] args) {
new SocketServer();
}
}
