我正在使用名为Diozero的库从 Java 中的树莓派控制 WS2811 LED 灯条。
当我第一次为 LED 设置颜色时，没有问题，但是当我再次尝试这样做时，LED 只是变成白色而不是我设置的颜色。当我重新启动应用程序时，我可以重新着色 LED，即使我没有重启它们，但同样，只有一次。
请帮忙！
package venus;
import com.diozero.api.DigitalOutputDevice;
import com.diozero.ws281xj.LedDriverInterface;
import com.diozero.ws281xj.PixelColour;
import com.diozero.ws281xj.StripType;
import com.diozero.ws281xj.rpiws281x.WS281x;
import java.awt.Color;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
* @author RETEC error
*/
public class Venus {
private static Venus instance;
private LedDriverInterface driver;
private DigitalOutputDevice power;
public Venus() {
int dataPin = 10; //bcm 10
int brightness = 127;
int numPixels = 50;
int powerPin = 26; //bcm 26 (inside, second from bottom)
//power = new DigitalOutputDevice(powerPin); //create a toggleable power supply
//powerOn(); //add power
driver = new WS281x(0, 0, dataPin, brightness, numPixels, StripType.WS2811_RGB); //create the driver for the leds
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
instance = new Venus();
instance.paintGradient(Color.red, Color.blue);
}
//power control methods
/**
* sudo Gives power to the designated power pin.
*/
private void powerOn() {
power.on();
}
/**
* Cuts power from the designated power pin.
*/
private void powerOff() {
power.off();
}
/**
* Cuts the power from the designated power pin and gives back power after 5
* secs.
*/
private void powerCycle() {
powerOff();
try {
Thread.sleep(5000);
} catch (InterruptedException ex) {
Logger.getLogger(Venus.class.getName()).log(Level.SEVERE, null, ex);
}
powerOn();
}
//color control methods
/**
* Paints a gradient on the full length of the LED driver, fading from c1 to
* c2.
*
* @param c1 Starting color
* @param c2 Ending color
*/
public void paintGradient(Color c1, Color c2) {
int[] colorValues = new int[driver.getNumPixels()]; //the 24 bit color values to be sent to the LEDs
for (int i = 0; i < colorValues.length; i++) {
float t = (float) i / (float) colorValues.length - 1;
Vector3 v1 = new Vector3(c1.getRed(), c1.getGreen(), c1.getBlue());
Vector3 v2 = new Vector3(c2.getRed(), c2.getGreen(), c2.getBlue());
Vector3 color = Vector3.Lerp(v1, v2, t);
colorValues[i] = PixelColour.createColourRGB((int) color.x, (int) color.y, (int) color.z);
}
//paint the pixels
for (int i = 0; i < driver.getNumPixels(); i++) {
driver.setPixelColour(i, colorValues[i]);
}
driver.render();
}
}