用java阅读mcp 3202,用kura表示覆盆子
我尝试用jdk.dio读取java中的gaz传感器,但我总是在SPI总线上读取0,代码如下:用java阅读mcp 3202,用kura表示覆盆子,java,raspberry-pi,spi,kura,Java,Raspberry Pi,Spi,Kura,我尝试用jdk.dio读取java中的gaz传感器,但我总是在SPI总线上读取0,代码如下: import java.nio.ByteBuffer; import org.slf4j.Logger; import jdk.dio.Device; import jdk.dio.DeviceConfig; import jdk.dio.DeviceManager; import jdk.dio.spibus.SPIDevice; import jdk.dio.spibus.SPIDevice
import java.nio.ByteBuffer;
import org.slf4j.Logger;
import jdk.dio.Device;
import jdk.dio.DeviceConfig;
import jdk.dio.DeviceManager;
import jdk.dio.spibus.SPIDevice;
import jdk.dio.spibus.SPIDeviceConfig;
public class SPIDACDemo {
public static void startApp(Logger sLogger, int spiDeviceId) {
try {
SPIDeviceConfig config = new SPIDeviceConfig(0, 1, 300000, 0, DeviceConfig.DEFAULT, Device.BIG_ENDIAN);
SPIDevice spi = (SPIDevice) DeviceManager.open(config);
while (true) {
ByteBuffer rcvMsg = ByteBuffer.wrap(new byte[2]);
int resp = spi.read(rcvMsg);
System.out.println(resp);
for (byte b : rcvMsg.array()) {
System.out.println(b);
}
String message = "Response: " + resp + ", Received: " + new String(rcvMsg.array(),"ASCII");
System.out.println(message);
Thread.sleep(1000);
}
spi.close();
System.out.println("Done");
} catch (Exception ex) {
System.out.println(ex.getMessage());
sLogger.error(SPIDACDemo.class.getName() + ", error:" + ex);
}
}
}
我的连接正常,我可以用python读取值,但在Java中我只读取0 在阅读之前你必须发送任何命令吗?您确定选择了正确的从属服务器吗?这个问题和库拉有什么关系?你能向传感器发送什么样的命令?从属0的结果相同。Kura使用jdk.dio库而不是pi4j来验证问题是否出在Java上。您可以使用Kura外部的传感器进行检查。只需使用简单的pi4j库