Java GpioPinAnalogValueChangeEvent.getValue方法代码示例

import com.pi4j.io.gpio.event.GpioPinAnalogValueChangeEvent; //导入方法依赖的package包/类
public static void main(String args[]) throws Exception {

        System.out.println("<--Pi4J--> MCP3008 ADC Example ... started.");

        // Create gpio controller
        final GpioController gpio = GpioFactory.getInstance();

        // Create custom MCP3008 analog gpio provider
        // we must specify which chip select (CS) that that ADC chip is physically connected to.
        final AdcGpioProvider provider = new MCP3008GpioProvider(SpiChannel.CS0);

        // Provision gpio analog input pins for all channels of the MCP3008.
        // (you don't have to define them all if you only use a subset in your project)
        final GpioPinAnalogInput inputs[] = {
                gpio.provisionAnalogInputPin(provider, MCP3008Pin.CH0, "MyAnalogInput-CH0"),
                gpio.provisionAnalogInputPin(provider, MCP3008Pin.CH1, "MyAnalogInput-CH1"),
                gpio.provisionAnalogInputPin(provider, MCP3008Pin.CH2, "MyAnalogInput-CH2"),
                gpio.provisionAnalogInputPin(provider, MCP3008Pin.CH3, "MyAnalogInput-CH3"),
                gpio.provisionAnalogInputPin(provider, MCP3008Pin.CH4, "MyAnalogInput-CH4"),
                gpio.provisionAnalogInputPin(provider, MCP3008Pin.CH5, "MyAnalogInput-CH5"),
                gpio.provisionAnalogInputPin(provider, MCP3008Pin.CH6, "MyAnalogInput-CH6"),
                gpio.provisionAnalogInputPin(provider, MCP3008Pin.CH7, "MyAnalogInput-CH7")
        };


        // Define the amount that the ADC input conversion value must change before
        // a 'GpioPinAnalogValueChangeEvent' is raised.  This is used to prevent unnecessary
        // event dispatching for an analog input that may have an acceptable or expected
        // range of value drift.
        provider.setEventThreshold(100, inputs); // all inputs; alternatively you can set thresholds on each input discretely

        // Set the background monitoring interval timer for the underlying framework to
        // interrogate the ADC chip for input conversion values.  The acceptable monitoring
        // interval will be highly dependant on your specific project.  The lower this value
        // is set, the more CPU time will be spend collecting analog input conversion values
        // on a regular basis.  The higher this value the slower your application will get
        // analog input value change events/notifications.  Try to find a reasonable balance
        // for your project needs.
        provider.setMonitorInterval(250); // milliseconds

        // Print current analog input conversion values from each input channel
        for(GpioPinAnalogInput input : inputs){
            System.out.println("<INITIAL VALUE> [" + input.getName() + "] : RAW VALUE = " + input.getValue());
        }

        // Create an analog pin value change listener
        GpioPinListenerAnalog listener = new GpioPinListenerAnalog()
        {
            @Override
            public void handleGpioPinAnalogValueChangeEvent(GpioPinAnalogValueChangeEvent event)
            {
                // get RAW value
                double value = event.getValue();

                // display output
                System.out.println("<CHANGED VALUE> [" + event.getPin().getName() + "] : RAW VALUE = " + value);
            }
        };

        // Register the gpio analog input listener for all input pins
        gpio.addListener(listener, inputs);

        // Keep this sample program running for 10 minutes
        for (int count = 0; count < 600; count++) {
            Thread.sleep(1000);
        }

        // When your program is finished, make sure to stop all GPIO activity/threads by shutting
        // down the GPIO controller (this method will forcefully shutdown all GPIO monitoring threads
        // and background scheduled tasks)
        gpio.shutdown();

        System.out.println("Exiting MCP3008GpioExample");
    }
 

import com.pi4j.io.gpio.event.GpioPinAnalogValueChangeEvent; //导入方法依赖的package包/类
public static void main(String args[]) throws Exception {

        System.out.println("<--Pi4J--> MCP3204 ADC Example ... started.");

        // Create gpio controller
        final GpioController gpio = GpioFactory.getInstance();

        // Create custom MCP3204 analog gpio provider
        // we must specify which chip select (CS) that that ADC chip is physically connected to.
        final AdcGpioProvider provider = new MCP3204GpioProvider(SpiChannel.CS0);

        // Provision gpio analog input pins for all channels of the MCP3204.
        // (you don't have to define them all if you only use a subset in your project)
        final GpioPinAnalogInput inputs[] = {
                gpio.provisionAnalogInputPin(provider, MCP3204Pin.CH0, "MyAnalogInput-CH0"),
                gpio.provisionAnalogInputPin(provider, MCP3204Pin.CH1, "MyAnalogInput-CH1"),
                gpio.provisionAnalogInputPin(provider, MCP3204Pin.CH2, "MyAnalogInput-CH2"),
                gpio.provisionAnalogInputPin(provider, MCP3204Pin.CH3, "MyAnalogInput-CH3")
        };


        // Define the amount that the ADC input conversion value must change before
        // a 'GpioPinAnalogValueChangeEvent' is raised.  This is used to prevent unnecessary
        // event dispatching for an analog input that may have an acceptable or expected
        // range of value drift.
        provider.setEventThreshold(100, inputs); // all inputs; alternatively you can set thresholds on each input discretely

        // Set the background monitoring interval timer for the underlying framework to
        // interrogate the ADC chip for input conversion values.  The acceptable monitoring
        // interval will be highly dependant on your specific project.  The lower this value
        // is set, the more CPU time will be spend collecting analog input conversion values
        // on a regular basis.  The higher this value the slower your application will get
        // analog input value change events/notifications.  Try to find a reasonable balance
        // for your project needs.
        provider.setMonitorInterval(250); // milliseconds

        // Print current analog input conversion values from each input channel
        for(GpioPinAnalogInput input : inputs){
            System.out.println("<INITIAL VALUE> [" + input.getName() + "] : RAW VALUE = " + input.getValue());
        }

        // Create an analog pin value change listener
        GpioPinListenerAnalog listener = new GpioPinListenerAnalog()
        {
            @Override
            public void handleGpioPinAnalogValueChangeEvent(GpioPinAnalogValueChangeEvent event)
            {
                // get RAW value
                double value = event.getValue();

                // display output
                System.out.println("<CHANGED VALUE> [" + event.getPin().getName() + "] : RAW VALUE = " + value);
            }
        };

        // Register the gpio analog input listener for all input pins
        gpio.addListener(listener, inputs);

        // Keep this sample program running for 10 minutes
        for (int count = 0; count < 600; count++) {
            Thread.sleep(1000);
        }

        // When your program is finished, make sure to stop all GPIO activity/threads by shutting
        // down the GPIO controller (this method will forcefully shutdown all GPIO monitoring threads
        // and background scheduled tasks)
        gpio.shutdown();

        System.out.println("Exiting MCP3204GpioExample");
    }
 

import com.pi4j.io.gpio.event.GpioPinAnalogValueChangeEvent; //导入方法依赖的package包/类
public static void main(String args[]) throws Exception {

        System.out.println("<--Pi4J--> MCP3004 ADC Example ... started.");

        // Create gpio controller
        final GpioController gpio = GpioFactory.getInstance();

        // Create custom MCP3004 analog gpio provider
        // we must specify which chip select (CS) that that ADC chip is physically connected to.
        final AdcGpioProvider provider = new MCP3004GpioProvider(SpiChannel.CS0);

        // Provision gpio analog input pins for all channels of the MCP3004.
        // (you don't have to define them all if you only use a subset in your project)
        final GpioPinAnalogInput inputs[] = {
                gpio.provisionAnalogInputPin(provider, MCP3004Pin.CH0, "MyAnalogInput-CH0"),
                gpio.provisionAnalogInputPin(provider, MCP3004Pin.CH1, "MyAnalogInput-CH1"),
                gpio.provisionAnalogInputPin(provider, MCP3004Pin.CH2, "MyAnalogInput-CH2"),
                gpio.provisionAnalogInputPin(provider, MCP3004Pin.CH3, "MyAnalogInput-CH3")
        };


        // Define the amount that the ADC input conversion value must change before
        // a 'GpioPinAnalogValueChangeEvent' is raised.  This is used to prevent unnecessary
        // event dispatching for an analog input that may have an acceptable or expected
        // range of value drift.
        provider.setEventThreshold(100, inputs); // all inputs; alternatively you can set thresholds on each input discretely

        // Set the background monitoring interval timer for the underlying framework to
        // interrogate the ADC chip for input conversion values.  The acceptable monitoring
        // interval will be highly dependant on your specific project.  The lower this value
        // is set, the more CPU time will be spend collecting analog input conversion values
        // on a regular basis.  The higher this value the slower your application will get
        // analog input value change events/notifications.  Try to find a reasonable balance
        // for your project needs.
        provider.setMonitorInterval(250); // milliseconds

        // Print current analog input conversion values from each input channel
        for(GpioPinAnalogInput input : inputs){
            System.out.println("<INITIAL VALUE> [" + input.getName() + "] : RAW VALUE = " + input.getValue());
        }

        // Create an analog pin value change listener
        GpioPinListenerAnalog listener = new GpioPinListenerAnalog()
        {
            @Override
            public void handleGpioPinAnalogValueChangeEvent(GpioPinAnalogValueChangeEvent event)
            {
                // get RAW value
                double value = event.getValue();

                // display output
                System.out.println("<CHANGED VALUE> [" + event.getPin().getName() + "] : RAW VALUE = " + value);
            }
        };

        // Register the gpio analog input listener for all input pins
        gpio.addListener(listener, inputs);

        // Keep this sample program running for 10 minutes
        for (int count = 0; count < 600; count++) {
            Thread.sleep(1000);
        }

        // When your program is finished, make sure to stop all GPIO activity/threads by shutting
        // down the GPIO controller (this method will forcefully shutdown all GPIO monitoring threads
        // and background scheduled tasks)
        gpio.shutdown();

        System.out.println("Exiting MCP3004GpioExample");
    }
 

import com.pi4j.io.gpio.event.GpioPinAnalogValueChangeEvent; //导入方法依赖的package包/类
public static void main(String args[]) throws InterruptedException, UnsupportedBusNumberException, IOException {

        System.out.println("<--Pi4J--> ADS1115 GPIO Example ... started.");

        // number formatters
        final DecimalFormat df = new DecimalFormat("#.##");
        final DecimalFormat pdf = new DecimalFormat("###.#");

        // create gpio controller
        final GpioController gpio = GpioFactory.getInstance();

        // create custom ADS1115 GPIO provider
        final ADS1115GpioProvider gpioProvider = new ADS1115GpioProvider(I2CBus.BUS_1, ADS1115GpioProvider.ADS1115_ADDRESS_0x48);

        // provision gpio analog input pins from ADS1115
        GpioPinAnalogInput myInputs[] = {
                gpio.provisionAnalogInputPin(gpioProvider, ADS1115Pin.INPUT_A0, "MyAnalogInput-A0"),
                gpio.provisionAnalogInputPin(gpioProvider, ADS1115Pin.INPUT_A1, "MyAnalogInput-A1"),
                gpio.provisionAnalogInputPin(gpioProvider, ADS1115Pin.INPUT_A2, "MyAnalogInput-A2"),
                gpio.provisionAnalogInputPin(gpioProvider, ADS1115Pin.INPUT_A3, "MyAnalogInput-A3"),
            };

        // ATTENTION !!
        // It is important to set the PGA (Programmable Gain Amplifier) for all analog input pins.
        // (You can optionally set each input to a different value)
        // You measured input voltage should never exceed this value!
        //
        // In my testing, I am using a Sharp IR Distance Sensor (GP2Y0A21YK0F) whose voltage never exceeds 3.3 VDC
        // (http://www.adafruit.com/products/164)
        //
        // PGA value PGA_4_096V is a 1:1 scaled input,
        // so the output values are in direct proportion to the detected voltage on the input pins
        gpioProvider.setProgrammableGainAmplifier(ProgrammableGainAmplifierValue.PGA_4_096V, ADS1115Pin.ALL);


        // Define a threshold value for each pin for analog value change events to be raised.
        // It is important to set this threshold high enough so that you don't overwhelm your program with change events for insignificant changes
        gpioProvider.setEventThreshold(500, ADS1115Pin.ALL);


        // Define the monitoring thread refresh interval (in milliseconds).
        // This governs the rate at which the monitoring thread will read input values from the ADC chip
        // (a value less than 50 ms is not permitted)
        gpioProvider.setMonitorInterval(100);


        // create analog pin value change listener
        GpioPinListenerAnalog listener = new GpioPinListenerAnalog()
        {
            @Override
            public void handleGpioPinAnalogValueChangeEvent(GpioPinAnalogValueChangeEvent event)
            {
                // RAW value
                double value = event.getValue();

                // percentage
                double percent =  ((value * 100) / ADS1115GpioProvider.ADS1115_RANGE_MAX_VALUE);

                // approximate voltage ( *scaled based on PGA setting )
                double voltage = gpioProvider.getProgrammableGainAmplifier(event.getPin()).getVoltage() * (percent/100);

                // display output
                System.out.println(" (" + event.getPin().getName() +") : VOLTS=" + df.format(voltage) + "  | PERCENT=" + pdf.format(percent) + "% | RAW=" + value + "       ");
            }
        };

        myInputs[0].addListener(listener);
        myInputs[1].addListener(listener);
        myInputs[2].addListener(listener);
        myInputs[3].addListener(listener);

        // keep program running for 10 minutes
        Thread.sleep(600000);

        // 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 ADS1115GpioExample");
    }
 

import com.pi4j.io.gpio.event.GpioPinAnalogValueChangeEvent; //导入方法依赖的package包/类
public static void main(String args[]) throws InterruptedException, UnsupportedBusNumberException, IOException {

        System.out.println("<--Pi4J--> ADS1015 GPIO Example ... started.");

        // number formatters
        final DecimalFormat df = new DecimalFormat("#.##");
        final DecimalFormat pdf = new DecimalFormat("###.#");

        // create gpio controller
        final GpioController gpio = GpioFactory.getInstance();

        // create custom ADS1015 GPIO provider
        final ADS1015GpioProvider gpioProvider = new ADS1015GpioProvider(I2CBus.BUS_1, ADS1015GpioProvider.ADS1015_ADDRESS_0x48);

        // provision gpio analog input pins from ADS1015
        GpioPinAnalogInput myInputs[] = {
                gpio.provisionAnalogInputPin(gpioProvider, ADS1015Pin.INPUT_A0, "MyAnalogInput-A0"),
                gpio.provisionAnalogInputPin(gpioProvider, ADS1015Pin.INPUT_A1, "MyAnalogInput-A1"),
                gpio.provisionAnalogInputPin(gpioProvider, ADS1015Pin.INPUT_A2, "MyAnalogInput-A2"),
                gpio.provisionAnalogInputPin(gpioProvider, ADS1015Pin.INPUT_A3, "MyAnalogInput-A3"),
            };

        // ATTENTION !!
        // It is important to set the PGA (Programmable Gain Amplifier) for all analog input pins.
        // (You can optionally set each input to a different value)
        // You measured input voltage should never exceed this value!
        //
        // In my testing, I am using a Sharp IR Distance Sensor (GP2Y0A21YK0F) whose voltage never exceeds 3.3 VDC
        // (http://www.adafruit.com/products/164)
        //
        // PGA value PGA_4_096V is a 1:1 scaled input,
        // so the output values are in direct proportion to the detected voltage on the input pins
        gpioProvider.setProgrammableGainAmplifier(ProgrammableGainAmplifierValue.PGA_4_096V, ADS1015Pin.ALL);


        // Define a threshold value for each pin for analog value change events to be raised.
        // It is important to set this threshold high enough so that you don't overwhelm your program with change events for insignificant changes
        gpioProvider.setEventThreshold(500, ADS1015Pin.ALL);


        // Define the monitoring thread refresh interval (in milliseconds).
        // This governs the rate at which the monitoring thread will read input values from the ADC chip
        // (a value less than 50 ms is not permitted)
        gpioProvider.setMonitorInterval(100);


        // create analog pin value change listener
        GpioPinListenerAnalog listener = new GpioPinListenerAnalog()
        {
            @Override
            public void handleGpioPinAnalogValueChangeEvent(GpioPinAnalogValueChangeEvent event)
            {
                // RAW value
                double value = event.getValue();

                // percentage
                double percent =  ((value * 100) / ADS1015GpioProvider.ADS1015_RANGE_MAX_VALUE);

                // approximate voltage ( *scaled based on PGA setting )
                double voltage = gpioProvider.getProgrammableGainAmplifier(event.getPin()).getVoltage() * (percent/100);

                // display output
                System.out.println(" (" + event.getPin().getName() +") : VOLTS=" + df.format(voltage) + "  | PERCENT=" + pdf.format(percent) + "% | RAW=" + value + "       ");
            }
        };

        myInputs[0].addListener(listener);
        myInputs[1].addListener(listener);
        myInputs[2].addListener(listener);
        myInputs[3].addListener(listener);

        // keep program running for 10 minutes
        Thread.sleep(600000);

        // 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 ADS1015GpioExample");
    }
 

import com.pi4j.io.gpio.event.GpioPinAnalogValueChangeEvent; //导入方法依赖的package包/类
public static void main(String args[]) throws Exception {

        System.out.println("<--Pi4J--> MCP3208 ADC Example ... started.");

        // Create gpio controller
        final GpioController gpio = GpioFactory.getInstance();

        // Create custom MCP3208 analog gpio provider
        // we must specify which chip select (CS) that that ADC chip is physically connected to.
        final AdcGpioProvider provider = new MCP3208GpioProvider(SpiChannel.CS0);

        // Provision gpio analog input pins for all channels of the MCP3208.
        // (you don't have to define them all if you only use a subset in your project)
        final GpioPinAnalogInput inputs[] = {
                gpio.provisionAnalogInputPin(provider, MCP3208Pin.CH0, "MyAnalogInput-CH0"),
                gpio.provisionAnalogInputPin(provider, MCP3208Pin.CH1, "MyAnalogInput-CH1"),
                gpio.provisionAnalogInputPin(provider, MCP3208Pin.CH2, "MyAnalogInput-CH2"),
                gpio.provisionAnalogInputPin(provider, MCP3208Pin.CH3, "MyAnalogInput-CH3"),
                gpio.provisionAnalogInputPin(provider, MCP3208Pin.CH4, "MyAnalogInput-CH4"),
                gpio.provisionAnalogInputPin(provider, MCP3208Pin.CH5, "MyAnalogInput-CH5"),
                gpio.provisionAnalogInputPin(provider, MCP3208Pin.CH6, "MyAnalogInput-CH6"),
                gpio.provisionAnalogInputPin(provider, MCP3208Pin.CH7, "MyAnalogInput-CH7")
        };


        // Define the amount that the ADC input conversion value must change before
        // a 'GpioPinAnalogValueChangeEvent' is raised.  This is used to prevent unnecessary
        // event dispatching for an analog input that may have an acceptable or expected
        // range of value drift.
        provider.setEventThreshold(100, inputs); // all inputs; alternatively you can set thresholds on each input discretely

        // Set the background monitoring interval timer for the underlying framework to
        // interrogate the ADC chip for input conversion values.  The acceptable monitoring
        // interval will be highly dependant on your specific project.  The lower this value
        // is set, the more CPU time will be spend collecting analog input conversion values
        // on a regular basis.  The higher this value the slower your application will get
        // analog input value change events/notifications.  Try to find a reasonable balance
        // for your project needs.
        provider.setMonitorInterval(250); // milliseconds

        // Print current analog input conversion values from each input channel
        for(GpioPinAnalogInput input : inputs){
            System.out.println("<INITIAL VALUE> [" + input.getName() + "] : RAW VALUE = " + input.getValue());
        }

        // Create an analog pin value change listener
        GpioPinListenerAnalog listener = new GpioPinListenerAnalog()
        {
            @Override
            public void handleGpioPinAnalogValueChangeEvent(GpioPinAnalogValueChangeEvent event)
            {
                // get RAW value
                double value = event.getValue();

                // display output
                System.out.println("<CHANGED VALUE> [" + event.getPin().getName() + "] : RAW VALUE = " + value);
            }
        };

        // Register the gpio analog input listener for all input pins
        gpio.addListener(listener, inputs);

        // Keep this sample program running for 10 minutes
        for (int count = 0; count < 600; count++) {
            Thread.sleep(1000);
        }

        // When your program is finished, make sure to stop all GPIO activity/threads by shutting
        // down the GPIO controller (this method will forcefully shutdown all GPIO monitoring threads
        // and background scheduled tasks)
        gpio.shutdown();

        System.out.println("Exiting MCP3208GpioExample");
    }