RS232 class

[Przemo]

Hi,

Do you know some good RS232C class? There is one in
VB.NET 101 Examples, but I think it is poor.

1.
I can't for e.g. read into my application all data
received. I must tell how many bytes I would like to
read. If I specify too many exception occures, if too
less there are still some data in buffer.

2.
I use a GPS receiver which send data by RS232. Every line
end with codes 10 and 13. I would like to read from RS232
Class one, or more such lines of data. But full lines! I
have noticed that this class gives me what it has -
sometime partial data.
Is it a spoecific thing about RS232 serial transmition or
only of this class?

Thanks.

Przemo

[Dick Grier]

Hi,

I use a GPS receiver which send data by RS232. Every line
end with codes 10 and 13. I would like to read from RS232
Class one, or more such lines of data. But full lines! I
have noticed that this class gives me what it has -
sometime partial data.
Is it a spoecific thing about RS232 serial transmition or
only of this class?
<<

This is normal. Just append new data to a string buffer, and use the
Substring method to determine if the CRLF is present -- if it is, then
process the buffer up to the CRLF, and retain the balance for the next set
of data that you receive.

I have a .NET DecodeGPS example class in my book (and a .NET serial class).
See below.

Also, you may be interested in getting the (free) Visual Basic .NET Resource
Kit from Microsoft (do a search for it). I contains a serial class from Sax
Software that is quite complete.

Dick

--
Richard Grier (Microsoft Visual Basic MVP)

See www.hardandsoftware.net for contact information.

Author of Visual Basic Programmer's Guide to Serial Communications, 3rd
Edition ISBN 1-890422-27-4 (391 pages) published February 2002.

[Herfried K. Wagner [MVP]]

* "Przemo" <p.**********@d eltatrans.pl> scripsit:

Do you know some good RS232C class? There is one in
VB.NET 101 Examples, but I think it is poor.

Thomas Scheidegger's Serial Port FAQ (in German)
<URL:http://groups.google.c om/groups?selm=O2U yhTLvDHA.1680%4 0TK2MSFTNGP12.p hx.gbl>

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

[Cor Ligthert]

Przemo,

Will you be so kind not to multipost. Now you have three very good answers
one in the newsgroup dotnet.general and two in the newsgroup languages.vb.

However readers of those newsgroup sees only one or two.

Use instead of this crossposting, than everybody sees three answers and can
use those. (crossposting sending one message to more newsgroup in one time).

Thanks in advance.

Cor

Do you know some good RS232C class? There is one in
VB.NET 101 Examples, but I think it is poor.

1.
I can't for e.g. read into my application all data
received. I must tell how many bytes I would like to
read. If I specify too many exception occures, if too
less there are still some data in buffer.

2.
I use a GPS receiver which send data by RS232. Every line
end with codes 10 and 13. I would like to read from RS232
Class one, or more such lines of data. But full lines! I
have noticed that this class gives me what it has -
sometime partial data.
Is it a spoecific thing about RS232 serial transmition or
only of this class?

Thanks.

Przemo