serial-port

问题 I used jssc library to read and write data from serial port. package serial; import jssc.*; public class Serial { public static void main(String[] args) { String[] portNames = null; portNames = SerialPortList.getPortNames(); for (String string : portNames) { System.out.println(string); } if (portNames.length == 0) { System.out.println("There are no serial-ports"); } else { SerialPort serialPort = new SerialPort("com2"); try { serialPort.openPort(); serialPort.setParams(SerialPort.BAUDRATE

问题 I am trying to setup a network interface over one of serialports of the system. I am using beaglebone and Xbee-wifi modules. Basically I'm trying to communicate 2 beaglebone over serialport bu using a TCP/IP protocole. I need to connect to the beaglebone via ssh, telnet or via default web port 80. So I do not need a single port working on the serial interface. I need a newtork intarface running over serialport. Is there anyway to do this? Hardware : beaglebone black os : angstrom 回答1: Here's

问题 I am trying to setup a network interface over one of serialports of the system. I am using beaglebone and Xbee-wifi modules. Basically I'm trying to communicate 2 beaglebone over serialport bu using a TCP/IP protocole. I need to connect to the beaglebone via ssh, telnet or via default web port 80. So I do not need a single port working on the serial interface. I need a newtork intarface running over serialport. Is there anyway to do this? Hardware : beaglebone black os : angstrom 回答1: Here's

问题 I'm trying to plot data from mpu6050 imu with arduino. MPU6050 sends data faster than plot. Arduino code gives 6 data which are yaw, pitch, roll, ax,ay and az from serial port. I need suggestions for fast plot . Python Code: import serial import matplotlib.pyplot as plt #import matplotlib library from drawnow import * ser = serial.Serial('COM9', 115200) yaw = 0.0 pitch =0.0 roll =0.0 ax =0.0 ay =0.0 az =0.0 o_yaw= [0] o_pitch= [0] o_roll= [0] o_ax= [0] o_ay= [0] o_az= [0] plt.ion() cnt=0 def

问题 How to get the Device Descriptor of a SerialPort using jssc ( java-simple-serial-connector) ? The getPortName() method gives port name ( e.g. COM2 ), but descriptor would be more helpful. If it's necessary to patch this opensource API to get the Device Descriptor how can it be done? 回答1: Look at gohai/java-simple-serial-connector, the SerialPortList class has a getPortProperties(String portName) method to get the port properties, unfortunately is not implemented yet for windows but is easy to

问题 The CreateFile function is useful for opening files or devices for read/write access, providing a handle. The third parameter, dwShareMode , specifies if the file/device can later be accessed by others. An example, with files: void* pFileHandle1 = ::CreateFileA("C:\\test.txt", GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0); DWORD lastError = GetLastError(); // 0, ERROR_SUCCESS void* pFileHandle2 = ::CreateFileA("C:\\test.txt", GENERIC_READ|GENERIC_WRITE,

问题 I have the following scenario: Rasperry pi connected to a device via Serial port 3g Dongle connected to the raspberry (with the ability to make/recieve calls) One process reading the data from the serial port and redirecting it to a server (using 3g) Another process waiting for a incoming call, and when someone calls the program takes the data from the serial port and redirect it via the 3g dongle using AT commands ( like fax-call). When someone calls, the call is made using AT commands and

问题 Hello I am using Read() method to read 10 characters say 0123456789 from serial port. Actually the characters are sent by a PIC Micro-controller. Here is my code: serialPort1.PortName = "com4"; serialPort1.BaudRate = 9600; serialPort1.Open(); char[] result = new char[10]; serialPort1.Read(result, 0, result.Length); string s = new string(result); MessageBox.Show(s); serialPort1.Close(); When I run the code, a message box shows up and displays only the first character. "0" alone is displayed in

问题 I am reading data from multiple serial ports. At present I am using a custom signal handler (by setting sa_handler) to compare and wake threads based on file descriptor information. I was searching for a way out to have individual threads with unique signal handlers, in this regard I found that select system call is to be used. Now I have following questions: If I am using a thread (Qt) then where do I put the select system call to monitor the serial port? Is the select system call thread

问题 I am reading data from multiple serial ports. At present I am using a custom signal handler (by setting sa_handler) to compare and wake threads based on file descriptor information. I was searching for a way out to have individual threads with unique signal handlers, in this regard I found that select system call is to be used. Now I have following questions: If I am using a thread (Qt) then where do I put the select system call to monitor the serial port? Is the select system call thread