I started looking for the same thing couple weeks ago, and I’ve been very happy with the multi-platform RXTX library so far. Works with any Windows, Linux and OS X. Has a very clean, easy to understand API. edit: RXTX is also open source.
Please take a look here: RS-232 for Linux and Windows 1) Windows Serial Port Programming 2) Using the Serial Ports in Visual C++ 3) Serial Communication in Windows 1) You can use this with Windows (incl. MinGW) as well as Linux. Alternative you can only use the code as an example. 2) Step-by-step tutorial how … Read more
We have moved to java-simple-serial-connector which seems to be very stable and comfortable at the current release 0.9.0. For now, it works on windows and linux systems. We use it for modem interactions.
On Windows, if you want to just make the computer make a beep sound: import winsound frequency = 2500 # Set Frequency To 2500 Hertz duration = 1000 # Set Duration To 1000 ms == 1 second winsound.Beep(frequency, duration) The winsound.Beep() can be used wherever you want the beep to occur.
this is not a good way to do it, it far better to work on the DataReceived event. basically with serial ports there’s a 3 stage process that works well. Receiving the Data from the serial port Waiting till you have a relevant chunk of data Interpreting the data so something like class DataCollector { … Read more
Thank you very much for your comments. I was able to reduce the delay to ~0.4ms. The command setserial(8) was referenced in the AEL manual. And bingo, I found the low_latency flag there with the following description: Minimize the receive latency of the serial device at the cost of greater CPU utilization. (Normally there is … Read more
What you need is a way to block the execution of some code, until something else has happened, or – how to get things running on two threads synchronously. .NET has quite a few classes in the System.Threading namespace for synchronization. We’ll use AutoResetEvent here. Think of AutoResetEvent as a turnstile. You can’t move forward … Read more
Busy waiting like while (!isReceived) {} will yield horrible performance so if keeping that structure you should change the variable from a boolean to a mutex/semaphore or something similar. But you should not keep it, so I mention this just for reference. Start by fetching a copy of the V.250 modem standard and read at … Read more
I assume you work on linux. First setup your serial port: stty -F /dev/ttyACM0 cs8 9600 ignbrk -brkint -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts Then you can use good old fashion fread/fwrite $fp =fopen(“/dev/ttyACM0”, “w+”); if( !$fp) { echo “Error”;die(); } fwrite($fp, $_SERVER[‘argv’][1] . 0x00); echo fread($fp, … Read more
Posting tonight’s code, for everybody’s enjoyment: public class SetupDiWrap { static public string ComPortNameFromFriendlyNamePrefix(string friendlyNamePrefix) { const string className = “Ports”; Guid[] guids = GetClassGUIDs(className); System.Text.RegularExpressions.Regex friendlyNameToComPort = new System.Text.RegularExpressions.Regex(@”.? \((COM\d+)\)$”); // “….. (COMxxx)” -> COMxxxx foreach (Guid guid in guids) { // We start at the “root” of the device tree and look for … Read more