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();
}
@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";
}
/**
* [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".
*
* <p>[ARGUMENT/OPTION "--pull (up|down|off)" | "-l (up|down|off)" | "--up" | "--down" ] This
* example program accepts an optional argument for specifying pin pull resistance. Supported
* values: "up|down" (or simply "1|0"). If no value is specified in the command argument, then the
* pin pull resistance will be set to PULL_UP by default. -- EXAMPLES: "--pull up", "-pull down",
* "--pull off", "--up", "--down", "-pull 0", "--pull 1", "-l up", "-l down".
*
* @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 BananaPro platform.
//
// ####################################################################
PlatformManager.setPlatform(Platform.BANANAPRO);
// 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 Input 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 BananaProPin 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(
BananaProPin.class, // pin provider class to obtain pin instance from
BananaProPin.GPIO_01, // default pin if no pin argument found
args); // argument array to search in
// by default we will use gpio pin PULL-UP; however, if an argument
// has been provided, then use the specified pull resistance
PinPullResistance pull =
CommandArgumentParser.getPinPullResistance(
PinPullResistance.PULL_UP, // default pin pull resistance if no pull argument found
args); // argument array to search in
// provision gpio pin as an input pin
final GpioPinDigitalInput input = gpio.provisionDigitalInputPin(pin, "MyInput", pull);
// set shutdown state for this pin: unexport the pin
input.setShutdownOptions(true);
// prompt user that we are ready
console.println("Successfully provisioned [" + pin + "] with PULL resistance = [" + pull + "]");
console.emptyLine();
console.box("The GPIO input pin states will be displayed below.");
console.emptyLine();
// display pin state
console.emptyLine();
console.println(
" ["
+ input.toString()
+ "] digital state is: "
+ ConsoleColor.conditional(
input.getState().isHigh(), // conditional expression
ConsoleColor.GREEN, // positive conditional color
ConsoleColor.RED, // negative conditional color
input.getState()));
console.emptyLine();
// 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();
}
/**
* This method can be called to forcefully shutdown all GPIO controller monitoring, listening,
* and task threads/executors.
*/
@Override
public synchronized void shutdown() {
delegate.shutdown();
}
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");
}
/**
* @param args --none-
* @throws InterruptedException
*/
public static void main(String[] args) throws InterruptedException {
// 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 -->", "IFTTT Maker Channel Trigger Example");
// allow for user to exit program using CTRL-C
console.promptForExit();
// create gpio controller
final GpioController gpio = GpioFactory.getInstance();
// provision gpio pin as an input pin
final GpioPinDigitalInput input =
gpio.provisionDigitalInputPin(RaspiPin.GPIO_00, "MyInputPin", PinPullResistance.PULL_DOWN);
// provide 500ms of pin debounce protection
input.setDebounce(500);
;
// -----------------------------------------
// Add the IFTTT Maker Channel Trigger
// (This is where the magic happens)
// -----------------------------------------
input.addTrigger(
new IFTTTMakerChannelTrigger(
IFTTT_MAKER_CHANNEL_API_KEY, // <<-- PROVIDE YOUR ACCOUNT SPECIFIC IFTTT MAKER CHANNEL
// API KEY
IFTTT_MAKER_CHANNEL_EVENT_NAME, // <<-- PROVIDE THE IFTTT MAKER CHANNEL EVENT NAME
// (defined in your IFTTTT recipe)
PinState.HIGH, // <<-- OPTIONALLY DEFINE A SPECIFIC STATE TO TRIGGER ON
// OPTIONALLY REGISTER A TRIGGER CALLBACK LISTENER
// (Note: this callback parameter is not required for basic functionality)
new IFTTTMakerChannelTriggerListener() {
@Override
public boolean onTriggered(IFTTTMakerChannelTriggerEvent event) {
// The IFTTT Maker Channel API accepts three value parameters (value1, value2, and
// value3)
// By default, Pi4J applies the following values to each:
//
// "value1" = {pin-name}
// "value2" = {pin-state-value} (as an Integer; 0==LOW, 1==HIGH)
// "value3" = {json-payload} Example:
// {
// "pin": {
// "name": "MyInputPin",
// "address": "0",
// "provider": "RaspberryPi GPIO Provider",
// "mode": "input",
// "direction": "IN",
// "pull": "down"
// },
// "state": {
// "name": "HIGH",
// "value": "1",
// "is-high": "true",
// "is-low": "false"
// },
// "timestamp": "2016-04-15T17:32:49.666-0400"
// }
//
// However, you can override any of these defaults in your callback listener by
// applying new string values via the 'setValueX()' methods on the event object.
//
// Example:
if (event.getValue2().equals("1")) {
event.setValue2("ON");
} else {
event.setValue2("OFF");
}
// display event trigger details on screen
console.println(" --> IFTTT MAKER CHANNEL EVENT TRIGGER");
console.println(" - GPIO PIN : " + event.getPin());
console.println(" - PIN STATE : " + event.getState());
console.println(" - IFTTT EVENT NAME : " + event.getEventName());
console.println(" - IFTTT EVENT VALUE 1 : " + event.getValue1());
console.println(" - IFTTT EVENT VALUE 2 : " + event.getValue2());
console.println(" - IFTTT EVENT VALUE 3 : " + event.getValue3());
console.emptyLine();
// MAKE SURE TO RETURN 'true' TO CONTINUE WITH THE IFTTT MAKER CHANNEL API CALL
// (you can optionally return 'false' if you want to abort the IFTTT API call)
return true;
}
}));
// set shutdown state for this pin: unexport the pin
input.setShutdownOptions(true);
// prompt user that we are ready
console.println(
"Successfully provisioned ["
+ input
+ "] with PULL resistance = ["
+ input.getPullResistance()
+ "]");
console.emptyLine();
// wait for user to exit by pressing CTRL-C
console.waitForExit();
// 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();
}
/**
* [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();
}
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();
}
