Solved

C#, Read serial Stream from Com1

Posted on 2011-03-04
1
1,160 Views
Last Modified: 2012-05-11
Hello
I have a device on my Com1 port, that sends me every 20ms data package with 10 Bytes, starting with a ":" .
To get this data, I open a serial Port.  
serialPort.Open();

Then I have a thread (1 sec cycle time) running that reads one byte after the other.
data = serialPort.ReadByte();

When I receive a ":" (start commando) I read nine Bytes:
serialPort.Read(buffer, 0, 9);

Now my Problem:
My thread reads the data only every second, but the Com1 device sends data every 20 ms.. When I disconect the Com1 device, I still read data on the Com1 port (has still data in its buffer). That means also, that I don't read the latest sent data from the Com1 device.
Can I empty or reset this Com1 buffer?
Or how can I read the latest recived data on the Com1 port?






I have VS2010 and .Net4.0

0
Comment
Question by:ICSAutomation
1 Comment
 
LVL 24

Accepted Solution

by:
alexey_gusev earned 200 total points
ID: 35042066
use DataReceived event to read the data (http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.datareceived.aspx)

DiscardInBuffer() clear incoming data buffer
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
XML & .net 5 40
XAML: Layout 8 25
User Authentication using Digital Certificate 2 20
Where can I ask about my ASP.NET MVC project? 6 16
Extention Methods in C# 3.0 by Ivo Stoykov C# 3.0 offers extension methods. They allow extending existing classes without changing the class's source code or relying on inheritance. These are static methods invoked as instance method. This…
Introduction                                                 Was the var keyword really only brought out to shorten your syntax? Or have the VB language guys got their way in C#? What type of variable is it? All will be revealed.   Also called…
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
This tutorial demonstrates a quick way of adding group price to multiple Magento products.

919 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now