本文整理匯總了Java中com.pi4j.io.gpio.GpioController.provisionAnalogOutputPin方法的典型用法代碼示例。如果您正苦於以下問題：Java GpioController.provisionAnalogOutputPin方法的具體用法？Java GpioController.provisionAnalogOutputPin怎麽用？Java GpioController.provisionAnalogOutputPin使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類com.pi4j.io.gpio.GpioController的用法示例。
在下文中一共展示了GpioController.provisionAnalogOutputPin方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: main
import com.pi4j.io.gpio.GpioController; //導入方法依賴的package包/類
public static void main(String args[]) throws Exception {
System.out.println("<--Pi4J--> MCP4725 DAC Example ... started.");
// create gpio controller
final GpioController gpio = GpioFactory.getInstance();
// create gpio provider
final MCP4725GpioProvider gpioProvider = new MCP4725GpioProvider(I2CBus.BUS_1, MCP4725GpioProvider.MCP4725_ADDRESS_1);
// create output pin
final GpioPinAnalogOutput vout = gpio.provisionAnalogOutputPin(gpioProvider, MCP4725Pin.OUTPUT);
// generate sinus wave on output pin
for (int i = 0; i < 360; i++) {
double y = Math.sin(Math.toRadians(i));
y = y / 2 + 0.5;
vout.setValue(y);
if (i == 359) {
i = 0;
}
}
}
示例2: main
import com.pi4j.io.gpio.GpioController; //導入方法依賴的package包/類
public static void main(String args[]) throws Exception {
System.out.println("<--Pi4J--> MCP4725 DAC Example ... started.");
// create gpio controller
final GpioController gpio = GpioFactory.getInstance();
// create gpio provider
final DacGpioProvider provider = new MCP4725GpioProvider(
I2CBus.BUS_1, // I2C BUS 1 on newer Raspberry Pi's
MCP4725GpioProvider.MCP4725_ADDRESS_1 // default address
);
// create output pin
final GpioPinAnalogOutput output = gpio.provisionAnalogOutputPin(provider, MCP4725Pin.OUTPUT);
// set a startup value for the output pin
output.setValue(0);
// set a shutdown value for the output pin
provider.setShutdownValue(MCP4725GpioProvider.MAX_VALUE, output);
// generate sinus wave on output pin
for (int i = 0; i < 360; i++) {
double y = Math.sin(Math.toRadians(i));
y = (y / 2 + 0.5) * 100;
// assign a percentage value instead of raw value
// (we have to use a helper method within the provider instead of directly on the pin instance)
provider.setPercentValue(output, y);
// rollover
if (i == 359) { i = 0; }
}
// generate a square wave on output pin
// for(int i = 0; i < 100000; i++) {
// output.setValue(gpioProvider.getMaxSupportedValue());
// Thread.sleep(2);
// output.setValue(gpioProvider.getMinSupportedValue());
// Thread.sleep(2);
// }
// 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 MCP4725GpioExample");
}