Boost Serial Port Flush

2020. 3. 3. 18:36카테고리 없음

Boost Serial Port FlushBoost Serial Port Flush

Doug was born in Geelong, Australia which is 75 kms (45 miles) from Melbourne. He graduated from Deakin University in 1977 with a Bachelor of Engineering degree.His first job was with the then government owned monoploy telephone company - Telstra. Work here was with the Telstra Research Laboratories developing software for a Gerber IDS-2 Interactive Graphics System. This system comprised a HP 2100A with 32K of core memory and a 2.5M hard disc.Doug's next project at Telstra was an automated system for testing telephone lines. This system used a network of DEC PDP11s. The software was written in Oregon Pascal with an event driven structure. This early involvement in event driven structures proved to be an invaluable stepping stone into Windows programming some years latter.In the IT contracting world Doug was involved in a project where the plan was to use DCOM for interprocess communications.

This idea was latter squashed in favour of an asynchronous system. While Doug agreed with that decision, the seed of interest in COM as a means of communicating with Microsoft products was planted.

Boost Serial Port

After all, if you are writing an application with a word processing component, why not leverage off the word processing software that is probably already installed on the machine?The birth of Doug's son coincided with a downturn in the IT industry in Australia. However, this was a great opportunity for Doug to spend quality time with the baby. In fact Doug was the parent that stayed home with the baby while mother went out to work.In 2003 Doug completed a Graduate Diploma in Education at La Trobe University to become a qualified secondary school Mathematics and Physics teacher. Subsequent IT contracts have been with universities that seem to like employing qualified educators. One such contract was to add functionality to MSN Messenger.Doug is currently working on the Dotric Station Blue series of model railway controllers. Orhan Albay 21-Oct-10 5:5721-Oct-10 5:57Hello,First of all, thanks Doug for this great article.

C# Flush Serial Port

I have developed a serial port programming language which is using the similar queue based send/recv threads.It is a handy, simple serial port programming language specially designed to simplify the development of RS232 based applications. It makes it easy not only to communicate with the serial port but also data parsing and extraction.It is freely available and I will appreciate if you test the application and let me know your thoughts.Download:Project Website:Thanks for taking your time.Orhan. Ron Beyer 17-Sep-Sep-10 17:27I run time critical applications in C# at 9600 baud and get almost no lag from a remote device to the local device.

This is accomplished by creating a new class called a SerialStreamReader which runs it's own continuous thread. The thread reads data from the serial port as soon as it's available and adds it to a queue until the data forms a complete message, at which time it raises an event to allow the upstream code to further process without slowing down the reading of the data at the serial port.My experience with the.NET serial port events is much like yours, poor performance on the stack. Using the DataRecievedEvent can cause problems with concurrency at slower baud rates when the serial line is near capacity (actually sending 9600bps).

Events start to overlap and you can get jumbled messages if not handled correctly. Event chains start backing up, the thread pool becomes saturated and the application excepts. Good article that needed to be written - 5 from me.I encountered this performance limitation when writing a gateway for an 8 modem pool.I created a Modem class that inherited the.NET serial port control. The applicatiion launched 8 instances of Modem on 8 separate threads and the GUI on its own thread. During testing I attempted to transfer 85k data files from several clients and was dismayed to find that as soon as there were two incoming data streams, the application would lock up hard, forcing me to kill the process. Run it in the debugger and lock up VS too! At first I thought the problem was with BeginInvoke and the GUI but later determined that the problem was more likely some sort of thread pool issue.I ended up reworking the Modem class to inherit from JH.CommBase, it launched a data received event in its own unique thread when bytes appeared on the serial port.

Parallel Port

Serial

This, to my relief, worked just fine.