1 将串口转USB设备的usb口插入麒麟主机,打开麒麟主机终端,执行 cd /dev 会产生一个文件夹serial,如果只有一个串口,串口名称为/dev/ttyUSB0,ll /dev/ttyUSB0 查看设备信息
2 写java程序接入
<dependency> <groupId>com.fazecast</groupId> <artifactId>jSerialComm</artifactId> <version>2.9.0</version> </dependency>
编写程序
public class ReadSer{
StringBuilder sb = new StringBuilder();
public static void main(String[] args) {
SerialPort serialPort = SerialPort.getCommPort("/dev/ttyUSB0"); // 替换为你的串口名称
try {
// 配置串口参数
serialPort.setComPortParameters(115200, 8, 1, 0);
if (serialPort.openPort()) {
log.info("串口已打开: " + serialPort.getSystemPortName());
} else {
log.info("串口打开失败: " + serialPort.getSystemPortName());
return;
}
// 读取数据
byte[] buffer = new byte[1024];
while(true){
int bytesRead = serialPort.readBytes(buffer, buffer.length);
log.info("接收到数据大小:" + bytesRead);
if (bytesRead > 0) {
List<String> str = new ArrayList<>();
sb.delete(0, sb.length());
for (int i = 0; i < bytesRead; i++) {
sb.append(String.format("%02x", buffer[i]&0xFF));
}
String value = sb.toString();
log.info("接收到数据,转换成16进制:" + value);
byte[] aByte = CRC8.getByte(value.substring(0, value.length() - 4));
int compute = CRC8.compute(aByte);
int crc = buffer[bytesRead - 2] & 0xFF;
if (compute != crc) {
log.info("接收到数据不正确,丢弃");
continue;
}
}
Thread.sleep(1000);
}
} catch (Exception e) {
log.error("串口失败", e);
log.info("串口失败," + e.getMessage());
if(serialPort.isOpen()){
serialPort.closePort();
}
}finally{
if(serialPort.isOpen()){
serialPort.closePort();
}
}
}
}
执行程序会报串口打开失败,原因是设备权限的问题
sudo usermod -aG dilout username 可解决