@RequestMapping("/left.html")
public String left() throws InterruptedException {
leftFrontMotor.toggle();
rightFrontMotor.toggle();
return "Moving left...";
}
@RequestMapping("/back.html")
public String back() throws InterruptedException {
leftBackMotor.high();
rightBackMotor.high();
return "Moving backwards...";
}
@RequestMapping("/forward.htmlc")
public String forward() throws InterruptedException {
leftFrontMotor.high();
rightFrontMotor.high();
return "Moving forward...";
}
@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 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 void addBit(boolean bit) throws InterruptedException {
clear.setState(true);
clock.setState(false);
if (bit) {
dataIn.setState(true);
} else dataIn.setState(false);
clock.setState(true); // clock in bit
clock.setState(false); // turn off clock until next opersation
dataIn.setState(false);
}
public void clear() throws InterruptedException {
clear.setState(false);
clear.setState(true);
push();
}
public void push() throws InterruptedException {
latch.setState(false);
latch.setState(true);
latch.setState(false);
}
/**
* [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();
}
